1
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Laigre E, Bonnet H, Beauvineau C, Lavergne T, Verga D, Defrancq E, Dejeu J, Teulade-Fichou MP. Systematic Evaluation of Benchmark G4 Probes and G4 Clinical Drugs using three Biophysical Methods: A Guideline to Evaluate Rapidly G4-Binding Affinity. Chembiochem 2024; 25:e202400210. [PMID: 38619969 DOI: 10.1002/cbic.202400210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 04/12/2024] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
G-quadruplex DNA structures (G4) are proven to interfere with most genetic and epigenetic processes. Small molecules binding these structures (G4 ligands) are invaluable tools to probe G4-biology and address G4-druggability in various diseases (cancer, viral infections). However, the large number of reported G4 ligands (>1000) could lead to confusion while selecting one for a given application. Herein we conducted a systematic affinity ranking of 11 popular G4 ligands vs 5 classical G4 sequences using FRET-melting, G4-FID assays and SPR. Interestingly SPR data globally align with the rankings obtained from the two semi-quantitative assays despite discrepancies due to limits and characteristics of each assay. In the whole, PhenDC3 emerges as the most potent binder irrespective of the G4 sequence. Immediately below PDS, PDC-360A, BRACO19, TMPyP4 and RHPS4 feature strong to medium binding again with poor G4 topology discrimination. More strikingly, the G4 drugs Quarfloxin, CX5461 and c-PDS exhibit weak affinity with all G4s studied. Finally, NMM and Cu-ttpy showed heterogeneous behaviors due, in part, to their physicochemical particularities poorly compatible with screening conditions. The remarkable properties of PhenDC3 led us to propose its use for benchmarking FRET-melting and G4-FID assays for rapid G4-affinity evaluation of newly developed ligands.
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Affiliation(s)
- E Laigre
- CNRS UMR9187, INSERM U1196, Institut Curie, PSL Research University, F-91405, Orsay, France
- CNRS UMR9187, INSERM U1196, Université Paris-Saclay, F-91405, Orsay, France
| | - H Bonnet
- DCM, UMR 5250, Univ. Grenoble Alpes, CNRS, 570 Rue de la Chimie, 38000, Grenoble, France
| | - C Beauvineau
- CNRS UMR9187, INSERM U1196, Institut Curie, PSL Research University, F-91405, Orsay, France
- CNRS UMR9187, INSERM U1196, Université Paris-Saclay, F-91405, Orsay, France
| | - T Lavergne
- DCM, UMR 5250, Univ. Grenoble Alpes, CNRS, 570 Rue de la Chimie, 38000, Grenoble, France
| | - D Verga
- CNRS UMR9187, INSERM U1196, Institut Curie, PSL Research University, F-91405, Orsay, France
- CNRS UMR9187, INSERM U1196, Université Paris-Saclay, F-91405, Orsay, France
| | - E Defrancq
- DCM, UMR 5250, Univ. Grenoble Alpes, CNRS, 570 Rue de la Chimie, 38000, Grenoble, France
| | - J Dejeu
- DCM, UMR 5250, Univ. Grenoble Alpes, CNRS, 570 Rue de la Chimie, 38000, Grenoble, France
- SUPMICROTECH, Université Franche-Comté, CNRS, Institut FEMTO-ST, 25000, Besançon, France
| | - M-P Teulade-Fichou
- CNRS UMR9187, INSERM U1196, Institut Curie, PSL Research University, F-91405, Orsay, France
- CNRS UMR9187, INSERM U1196, Université Paris-Saclay, F-91405, Orsay, France
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2
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Zhang Y, Bux K, Attana F, Wei D, Haider S, Parkinson GN. Structural descriptions of ligand interactions to RNA quadruplexes folded from the non-coding region of pseudorabies virus. Biochimie 2024:S0300-9084(24)00139-1. [PMID: 38876382 DOI: 10.1016/j.biochi.2024.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 05/02/2024] [Accepted: 06/12/2024] [Indexed: 06/16/2024]
Abstract
To rationalise the binding of specific ligands to RNA-quadruplex we investigated several naphthalene diimide ligands that interact with the non-coding region of Pseudorabies virus (PRV). Herein we report on the x-ray structure of the naphthalene diimide ND11 with an RNA G-quadruplex putative forming sequence from rPRV. Consistent with previously observed rPRV sequence it assembles into a bimolecular RNA G-quadruplex consisting of a pair of two tetrads stacked 3' to 5'. We observe that ND11 interacts by binding on both the externally available 5' and 3' quartets. The CUC (loop 1) is structurally altered to enhance the 5' mode of interaction. These loop residues are shifted significantly to generate a new ligand binding pocket whereas the terminal A14 residue is lifted away from the RNA G-quadruplex tetrad plane to be restacked above the bound ND11 ligand NDI core. CD analysis of this family of NDI ligands shows consistency in the spectra between the different ligands in the presence of the rPRV RNA G-quadruplex motif, reflecting a common folded topology and mode of ligand interaction. FRET melt assay confirms the strong stabilising properties of the tetrasubstituted NDI compounds and the contributions length of the substituted groups have on melt temperatures.
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Affiliation(s)
- Yashu Zhang
- Department of Pharmaceutical and Biological Chemistry, University College London School of Pharmacy, London, WC1N 1AX, UK; Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, China; State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Khair Bux
- Faculty of Life Science, Shaheed Zulfikar Ali Bhutto Institute of Science and Technology, Karachi, 75600, Pakistan
| | - Fedaa Attana
- Department of Pharmaceutical and Biological Chemistry, University College London School of Pharmacy, London, WC1N 1AX, UK
| | - Dengguo Wei
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Shozeb Haider
- Department of Pharmaceutical and Biological Chemistry, University College London School of Pharmacy, London, WC1N 1AX, UK
| | - Gary N Parkinson
- Department of Pharmaceutical and Biological Chemistry, University College London School of Pharmacy, London, WC1N 1AX, UK.
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3
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Geng Y, Liu C, Xu N, Suen MC, Miao H, Xie Y, Zhang B, Chen X, Song Y, Wang Z, Cai Q, Zhu G. Crystal structure of a tetrameric RNA G-quadruplex formed by hexanucleotide repeat expansions of C9orf72 in ALS/FTD. Nucleic Acids Res 2024:gkae473. [PMID: 38860430 DOI: 10.1093/nar/gkae473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 05/16/2024] [Accepted: 05/29/2024] [Indexed: 06/12/2024] Open
Abstract
The abnormal GGGGCC hexanucleotide repeat expansions (HREs) in C9orf72 cause the fatal neurodegenerative diseases including amyotrophic lateral sclerosis and frontotemporal dementia. The transcribed RNA HREs, short for r(G4C2)n, can form toxic RNA foci which sequestrate RNA binding proteins and impair RNA processing, ultimately leading to neurodegeneration. Here, we determined the crystal structure of r(G4C2)2, which folds into a parallel tetrameric G-quadruplex composed of two four-layer dimeric G-quadruplex via 5'-to-5' stacking in coordination with a K+ ion. Notably, the two C bases locate at 3'- end stack on the outer G-tetrad with the assistance of two additional K+ ions. The high-resolution structure reported here lays a foundation in understanding the mechanism of neurological toxicity of RNA HREs. Furthermore, the atomic details provide a structural basis for the development of potential therapeutic agents against the fatal neurodegenerative diseases ALS/FTD.
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Affiliation(s)
- Yanyan Geng
- Clinical Research Institute of the First Affiliated Hospital of Xiamen University, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Institute for Advanced Study and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Department of Neurosurgery and Department of Neuroscience, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Changdong Liu
- Institute for Advanced Study and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- HKUST Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen, Guangdong, China
| | - Naining Xu
- Institute for Advanced Study and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- HKUST Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen, Guangdong, China
| | - Monica Ching Suen
- Institute for Advanced Study and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- HKUST Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen, Guangdong, China
| | - Haitao Miao
- Institute for Advanced Study and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yuanyuan Xie
- Department of Neurosurgery and Department of Neuroscience, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Bingchang Zhang
- Department of Neurosurgery and Department of Neuroscience, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Xueqin Chen
- Clinical Research Institute of the First Affiliated Hospital of Xiamen University, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Yuanjian Song
- Jiangsu Key Laboratory of Brain Disease Bioinformation, Department of Genetics, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Zhanxiang Wang
- Department of Neurosurgery and Department of Neuroscience, Fujian Key Laboratory of Brain Tumors Diagnosis and Precision Treatment, Xiamen Key Laboratory of Brain Center, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Qixu Cai
- State Key Laboratory of Vaccines for Infectious Diseases, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Guang Zhu
- Institute for Advanced Study and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- HKUST Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen, Guangdong, China
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4
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Leisegang MS, Warwick T, Stötzel J, Brandes RP. RNA-DNA triplexes: molecular mechanisms and functional relevance. Trends Biochem Sci 2024; 49:532-544. [PMID: 38582689 DOI: 10.1016/j.tibs.2024.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/05/2024] [Accepted: 03/18/2024] [Indexed: 04/08/2024]
Abstract
Interactions of RNA with DNA are principles of gene expression control that have recently gained considerable attention. Among RNA-DNA interactions are R-loops and RNA-DNA hybrid G-quadruplexes, as well as RNA-DNA triplexes. It is proposed that RNA-DNA triplexes guide RNA-associated regulatory proteins to specific genomic locations, influencing transcription and epigenetic decision making. Although triplex formation initially was considered solely an in vitro event, recent progress in computational, biochemical, and biophysical methods support in vivo functionality with relevance for gene expression control. Here, we review the central methodology and biology of triplexes, outline paradigms required for triplex function, and provide examples of physiologically important triplex-forming long non-coding RNAs.
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Affiliation(s)
- Matthias S Leisegang
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, Frankfurt, Germany; German Centre of Cardiovascular Research (DZHK), Partner site RheinMain, Frankfurt, Germany.
| | - Timothy Warwick
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, Frankfurt, Germany; German Centre of Cardiovascular Research (DZHK), Partner site RheinMain, Frankfurt, Germany
| | - Julia Stötzel
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, Frankfurt, Germany; German Centre of Cardiovascular Research (DZHK), Partner site RheinMain, Frankfurt, Germany
| | - Ralf P Brandes
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, Frankfurt, Germany; German Centre of Cardiovascular Research (DZHK), Partner site RheinMain, Frankfurt, Germany
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5
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Chen Y, Long J, Wu S, Wei Y, Yan F, Li Q, Yan J, Zhang N, Xu W. Disruption of a DNA G-quadruplex causes a gain-of-function SCL45A1 variant relevant to developmental disorders. Acta Biochim Biophys Sin (Shanghai) 2024; 56:709-716. [PMID: 38655615 PMCID: PMC11177108 DOI: 10.3724/abbs.2024053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 01/04/2024] [Indexed: 04/26/2024] Open
Abstract
SLC45A1 encodes a glucose transporter protein highly expressed in the brain. Mutations in SLC45A1 may lead to neurological diseases and developmental disorders, but its exact role is poorly understood. DNA G-quadruplexes (DNA G4s) are stable structures formed by four guanine bases and play a role in gene regulation and genomic stability. Changes in DNA G4s may affect brain development and function. The mechanism linking alterations in DNA G-quadruplex structures to SLC45A1 pathogenicity remains unknown. In this study, we identify a functional DNA G-quadruplex and its key binding site on SLC45A1 (NM_001080397.3: exon 2: c.449 G>A: p.R150K). This variant results in the upregulation of mRNA and protein expression, which may lead to intellectual developmental disorder with neuropsychiatric features. Mechanistically, the mutation is found to disrupt DNA G-quadruplex structures on SLC45A1, leading to transcriptional enhancement and a gain-of-function mutation, which further causes increased expression and function of the SLC45A1 protein. The identification of the functional DNA G-quadruplex and its effects on DNA G4s may provide new insights into the genetic basis of SLC45A1 pathogenicity and highlight the importance of DNA G4s of SLC45A1 in regulating gene expression and brain development.
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Affiliation(s)
- Yuxi Chen
- Joint Laboratory of Reproductive MedicineGynaecology and Paediatric Diseases and Birth Defects of Ministry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
- West China School of PharmacySichuan UniversityChengdu610041China
| | - Jiang Long
- The Mental Health Centre and the Psychiatric LaboratoryWest China HospitalSichuan UniversityChengdu610041China
| | - Sixian Wu
- Joint Laboratory of Reproductive MedicineGynaecology and Paediatric Diseases and Birth Defects of Ministry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
| | - Yazhen Wei
- West China School of PharmacySichuan UniversityChengdu610041China
| | - Fei Yan
- Joint Laboratory of Reproductive MedicineGynaecology and Paediatric Diseases and Birth Defects of Ministry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
| | - Qing Li
- Joint Laboratory of Reproductive MedicineGynaecology and Paediatric Diseases and Birth Defects of Ministry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
| | - Jierui Yan
- Joint Laboratory of Reproductive MedicineGynaecology and Paediatric Diseases and Birth Defects of Ministry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
| | - Nannan Zhang
- National Centre for Birth Defect MonitoringKey Laboratory of Birth Defects and Related Diseases of Women and ChildrenMinistry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
| | - Wenming Xu
- Joint Laboratory of Reproductive MedicineGynaecology and Paediatric Diseases and Birth Defects of Ministry of EducationWest China Second University HospitalSichuan UniversityChengdu610041China
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6
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Zhang Z, Mlýnský V, Krepl M, Šponer J, Stadlbauer P. Mechanical Stability and Unfolding Pathways of Parallel Tetrameric G-Quadruplexes Probed by Pulling Simulations. J Chem Inf Model 2024; 64:3896-3911. [PMID: 38630447 PMCID: PMC11094737 DOI: 10.1021/acs.jcim.4c00227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 05/14/2024]
Abstract
Guanine quadruplex (GQ) is a noncanonical nucleic acid structure formed by guanine-rich DNA and RNA sequences. Folding of GQs is a complex process, where several aspects remain elusive, despite being important for understanding structure formation and biological functions of GQs. Pulling experiments are a common tool for acquiring insights into the folding landscape of GQs. Herein, we applied a computational pulling strategy─steered molecular dynamics (SMD) simulations─in combination with standard molecular dynamics (MD) simulations to explore the unfolding landscapes of tetrameric parallel GQs. We identified anisotropic properties of elastic conformational changes, unfolding transitions, and GQ mechanical stabilities. Using a special set of structural parameters, we found that the vertical component of pulling force (perpendicular to the average G-quartet plane) plays a significant role in disrupting GQ structures and weakening their mechanical stabilities. We demonstrated that the magnitude of the vertical force component depends on the pulling anchor positions and the number of G-quartets. Typical unfolding transitions for tetrameric parallel GQs involve base unzipping, opening of the G-stem, strand slippage, and rotation to cross-like structures. The unzipping was detected as the first and dominant unfolding event, and it usually started at the 3'-end. Furthermore, results from both SMD and standard MD simulations indicate that partial spiral conformations serve as a transient ensemble during the (un)folding of GQs.
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Affiliation(s)
- Zhengyue Zhang
- Institute
of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno 61200, Czech Republic
- CEITEC−Central
European Institute of Technology, Masaryk
University, Kamenice
5, Brno 625 00, Czech Republic
- National
Center for Biomolecular Research,
Faculty of Science, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic
| | - Vojtěch Mlýnský
- Institute
of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno 61200, Czech Republic
| | - Miroslav Krepl
- Institute
of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno 61200, Czech Republic
| | - Jiří Šponer
- Institute
of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno 61200, Czech Republic
| | - Petr Stadlbauer
- Institute
of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno 61200, Czech Republic
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7
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Zhuk AS, Stepchenkova EI, Zotova IV, Belopolskaya OB, Pavlov YI, Kostroma II, Gritsaev SV, Aksenova AY. G-Quadruplex Forming DNA Sequence Context Is Enriched around Points of Somatic Mutations in a Subset of Multiple Myeloma Patients. Int J Mol Sci 2024; 25:5269. [PMID: 38791307 PMCID: PMC11121618 DOI: 10.3390/ijms25105269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Multiple myeloma (MM) is the second most common hematological malignancy, which remains incurable despite recent advances in treatment strategies. Like other forms of cancer, MM is characterized by genomic instability, caused by defects in DNA repair. Along with mutations in DNA repair genes and genotoxic drugs used to treat MM, non-canonical secondary DNA structures (four-stranded G-quadruplex structures) can affect accumulation of somatic mutations and chromosomal abnormalities in the tumor cells of MM patients. Here, we tested the hypothesis that G-quadruplex structures may influence the distribution of somatic mutations in the tumor cells of MM patients. We sequenced exomes of normal and tumor cells of 11 MM patients and analyzed the data for the presence of G4 context around points of somatic mutations. To identify molecular mechanisms that could affect mutational profile of tumors, we also analyzed mutational signatures in tumor cells as well as germline mutations for the presence of specific SNPs in DNA repair genes or in genes regulating G-quadruplex unwinding. In several patients, we found that sites of somatic mutations are frequently located in regions with G4 context. This pattern correlated with specific germline variants found in these patients. We discuss the possible implications of these variants for mutation accumulation and specificity in MM and propose that the extent of G4 context enrichment around somatic mutation sites may be a novel metric characterizing mutational processes in tumors.
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Affiliation(s)
- Anna S. Zhuk
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.S.Z.); (I.V.Z.)
- Institute of Applied Computer Science, ITMO University, 197101 St. Petersburg, Russia
| | - Elena I. Stepchenkova
- Vavilov Institute of General Genetics, St. Petersburg Branch, Russian Academy of Sciences, 199034 St. Petersburg, Russia;
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Irina V. Zotova
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.S.Z.); (I.V.Z.)
- Vavilov Institute of General Genetics, St. Petersburg Branch, Russian Academy of Sciences, 199034 St. Petersburg, Russia;
| | - Olesya B. Belopolskaya
- Resource Center “Bio-Bank Center”, Research Park of St. Petersburg State University, 198504 St. Petersburg, Russia;
- The Laboratory of Genogeography, Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Youri I. Pavlov
- Eppley Institute for Research in Cancer, Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA;
- Departments of Biochemistry and Molecular Biology, Microbiology and Pathology, Genetics Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ivan I. Kostroma
- City Hospital No. 15, 198205 St. Petersburg, Russia; (I.I.K.); (S.V.G.)
| | | | - Anna Y. Aksenova
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.S.Z.); (I.V.Z.)
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8
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Galli S, Flint G, Růžičková L, Di Antonio M. Genome-wide mapping of G-quadruplex DNA: a step-by-step guide to select the most effective method. RSC Chem Biol 2024; 5:426-438. [PMID: 38725910 PMCID: PMC11078208 DOI: 10.1039/d4cb00023d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 03/21/2024] [Indexed: 05/12/2024] Open
Abstract
The development of methods that enabled genome-wide mapping of DNA G-quadruplex structures in chromatin has played a critical role in providing evidence to support the formation of these structures in living cells. Over the past decade, a variety of methods aimed at mapping G-quadruplexes have been reported in the literature. In this critical review, we have sought to provide a technical overview on the relative strengths and weaknesses of the genomics approaches currently available, offering step-by-step guidance to assessing experimental needs and selecting the most appropriate method to achieve effective genome-wide mapping of DNA G-quadruplexes.
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Affiliation(s)
- Silvia Galli
- Imperial College London, Chemistry Department, Molecular Science Research Hub 82 Wood Lane London UK
| | - Gem Flint
- Imperial College London, Chemistry Department, Molecular Science Research Hub 82 Wood Lane London UK
- Institute of Chemical Biology, Molecular Science Research Hub 82 Wood Lane London UK
| | - Lucie Růžičková
- Imperial College London, Chemistry Department, Molecular Science Research Hub 82 Wood Lane London UK
| | - Marco Di Antonio
- Imperial College London, Chemistry Department, Molecular Science Research Hub 82 Wood Lane London UK
- Institute of Chemical Biology, Molecular Science Research Hub 82 Wood Lane London UK
- The Francis Crick Institute 1 Midland Road London UK
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9
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Comptdaer T, Tardivel M, Schirmer C, Buée L, Galas MC. Cell redistribution of G quadruplex-structured DNA is associated with morphological changes of nuclei and nucleoli in neurons during tau pathology progression. Brain Pathol 2024:e13262. [PMID: 38649330 DOI: 10.1111/bpa.13262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 04/02/2024] [Indexed: 04/25/2024] Open
Abstract
While the double helical structure has long been its iconic representation, DNA is structurally dynamic and can adopt alternative secondary configurations. Specifically, guanine-rich DNA sequences can fold in guanine quadruplexes (G4) structures. These G4 play pivotal roles as regulators of gene expression and genomic stability, and influence protein homeostasis. Despite their significance, the association of G4 with neurodegenerative diseases such as Alzheimer's disease (AD) has been underappreciated. Recent findings have identified DNA sequences predicted to form G4 in sarkosyl-insoluble aggregates from AD brains, questioning the involvement of G4-structured DNA (G4 DNA) in the pathology. Using immunofluorescence coupled to confocal microscopy analysis we investigated the impact of tau pathology, a hallmark of tauopathies including AD, on the distribution of G4 DNA in murine neurons and its relevance to AD brains. In healthy neurons, G4 DNA is detected in nuclei with a notable presence in nucleoli. However, in a transgenic mouse model of tau pathology (THY-Tau22), early stages of the disease exhibit an impairment in the nuclear distribution of G4 DNA. In addition, G4 DNA accumulates in the cytoplasm of neurons exhibiting oligomerized tau and oxidative DNA damage. This altered distribution persists in the later stage of the pathology when larger tau aggregates are present. Still cytoplasmic deposition of G4 DNA does not appear to be a critical factor in the tau aggregation process. Similar patterns are observed in neurons from the AD cortex. Furthermore, the disturbance in G4 DNA distribution is associated with various changes in the size of neuronal nuclei and nucleoli, indicative of responses to stress and the activation of pro-survival mechanisms. Our results shed light on a significant impact of tau pathology on the dynamics of G4 DNA and on nuclear and nucleolar mechanobiology in neurons. These findings reveal new dimensions in the etiopathogenesis of tauopathies.
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Affiliation(s)
- Thomas Comptdaer
- University of Lille, Inserm, CHU Lille, CNRS, LilNCog-Lille Neuroscience and Cognition, Lille, France
| | - Meryem Tardivel
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US41-UAR 2014-PLBS, Lille, France
| | - Claire Schirmer
- University of Lille, Inserm, CHU Lille, CNRS, LilNCog-Lille Neuroscience and Cognition, Lille, France
| | - Luc Buée
- University of Lille, Inserm, CHU Lille, CNRS, LilNCog-Lille Neuroscience and Cognition, Lille, France
| | - Marie-Christine Galas
- University of Lille, Inserm, CHU Lille, CNRS, LilNCog-Lille Neuroscience and Cognition, Lille, France
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10
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Fleming AM, Guerra Castañaza Jenkins BL, Buck BA, Burrows CJ. DNA Damage Accelerates G-Quadruplex Folding in a Duplex-G-Quadruplex-Duplex Context. J Am Chem Soc 2024; 146. [PMID: 38602473 PMCID: PMC11046481 DOI: 10.1021/jacs.4c00960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/12/2024]
Abstract
Molecular details for the impact of DNA damage on folding of potential G-quadruplex sequences (PQSs) to noncanonical DNA structures involved in gene regulation are poorly understood. Here, the effects of DNA base damage and strand breaks on PQS folding kinetics were studied in the context of the VEGF promoter sequence embedded between two DNA duplex anchors, termed a duplex-G-quadruplex-duplex (DGD) motif. This DGD scaffold imposes constraints on the PQS folding process that more closely mimic those found in genomic DNA. Folding kinetics were monitored by circular dichroism (CD) to find folding half-lives ranging from 2 s to 12 min depending on the DNA damage type and sequence position. The presence of Mg2+ ions and G-quadruplex (G4)-binding protein APE1 facilitated the folding reactions. A strand break placing all four G runs required for G4 formation on one side of the break accelerated the folding rate by >150-fold compared to the undamaged sequence. Combined 1D 1H NMR and CD analyses confirmed that isothermal folding of the VEGF-DGD constructs yielded spectral signatures that suggest the formation of G4 motifs and demonstrated a folding dependency on the nature and location of DNA damage. Importantly, the PQS folding half-lives measured are relevant to replication, transcription, and DNA repair time frames.
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Affiliation(s)
- Aaron M. Fleming
- Department of Chemistry, University
of Utah, 315 South 1400 East, Salt
Lake City, Utah 84112-0850, United States
| | | | - Bethany A. Buck
- Department of Chemistry, University
of Utah, 315 South 1400 East, Salt
Lake City, Utah 84112-0850, United States
| | - Cynthia J. Burrows
- Department of Chemistry, University
of Utah, 315 South 1400 East, Salt
Lake City, Utah 84112-0850, United States
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11
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Marshall PR, Davies J, Zhao Q, Liau WS, Lee Y, Basic D, Periyakaruppiah A, Zajaczkowski EL, Leighton LJ, Madugalle SU, Musgrove M, Kielar M, Brueckner AM, Gong H, Ren H, Walsh A, Kaczmarczyk L, Jackson WS, Chen A, Spitale RC, Bredy TW. DNA G-Quadruplex Is a Transcriptional Control Device That Regulates Memory. J Neurosci 2024; 44:e0093232024. [PMID: 38418220 PMCID: PMC11007313 DOI: 10.1523/jneurosci.0093-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/14/2024] [Accepted: 02/20/2024] [Indexed: 03/01/2024] Open
Abstract
The conformational state of DNA fine-tunes the transcriptional rate and abundance of RNA. Here, we report that G-quadruplex DNA (G4-DNA) accumulates in neurons, in an experience-dependent manner, and that this is required for the transient silencing and activation of genes that are critically involved in learning and memory in male C57/BL6 mice. In addition, site-specific resolution of G4-DNA by dCas9-mediated deposition of the helicase DHX36 impairs fear extinction memory. Dynamic DNA structure states therefore represent a key molecular mechanism underlying memory consolidation.One-Sentence Summary: G4-DNA is a molecular switch that enables the temporal regulation of the gene expression underlying the formation of fear extinction memory.
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Affiliation(s)
- Paul R Marshall
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
- Genome Sciences and Cancer Division & Eccles Institute of Neuroscience, John Curtin School of Medical Research, Australian National University, Canberra 2601, Australia
| | - Joshua Davies
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Qiongyi Zhao
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Wei-Siang Liau
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Yujin Lee
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Dean Basic
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Ambika Periyakaruppiah
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Esmi L Zajaczkowski
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Laura J Leighton
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Sachithrani U Madugalle
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Mason Musgrove
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Marcin Kielar
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Arie Maeve Brueckner
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Hao Gong
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Haobin Ren
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Alexander Walsh
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
| | - Lech Kaczmarczyk
- Department of Biomedical and Clinical Sciences (BKV), Division of Neurobiology (NEURO), Linköping University, Linköping 581 83, Sweden
| | - Walker S Jackson
- Department of Biomedical and Clinical Sciences (BKV), Division of Neurobiology (NEURO), Linköping University, Linköping 581 83, Sweden
| | - Alon Chen
- Neurobiology of Stress Laboratory, Department Brain Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Robert C Spitale
- Department of Pharmaceutical Sciences, University of California Irvine, Irvine, California 92697
| | - Timothy W Bredy
- Cognitive Neuroepigenetics Laboratory, The Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072, Australia
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12
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Hussen AS, Kravitz HL, Freudenthal BD, Whitaker AM. Oxidative DNA damage on the VEGF G-quadruplex forming promoter is repaired via long-patch BER. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2024; 65 Suppl 1:25-39. [PMID: 37606505 PMCID: PMC10984112 DOI: 10.1002/em.22570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/01/2023] [Accepted: 08/20/2023] [Indexed: 08/23/2023]
Abstract
In response to oxidative damage, base excision repair (BER) enzymes perturb the structural equilibrium of the VEGF promoter between B-form and G4 DNA conformations, resulting in epigenetic-like modifications of gene expression. However, the mechanistic details remain enigmatic, including the activity and coordination of BER enzymes on the damaged G4 promoter. To address this, we investigated the ability of each BER factor to conduct its repair activity on VEGF promoter G4 DNA substrates by employing pre-steady-state kinetics assays and in vitro coupled BER assays. OGG1 was able to initiate BER on double-stranded VEGF promoter G4 DNA substrates. Moreover, pre-steady-state kinetics revealed that compared to B-form DNA, APE1 repair activity on the G4 was decreased ~two-fold and is the result of slower product release as opposed to inefficient strand cleavage. Interestingly, Pol β performs multiple insertions on G4 substrates via strand displacement DNA synthesis in contrast to a single insertion on B-form DNA. The multiple insertions inhibit ligation of the Pol β products, and hence BER is not completed on the VEGF G4 promoter substrates through canonical short-patch BER. Instead, repair requires the long-patch BER flap-endonuclease activity of FEN1 in response to the multiple insertions by Pol β prior to ligation. Because the BER proteins and their repair activities are a key part of the VEGF transcriptional enhancement in response to oxidative DNA damage of the G4 VEGF promoter, the new insights reported here on BER activity in the context of this promoter are relevant toward understanding the mechanism of transcriptional regulation.
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Affiliation(s)
- Adil S. Hussen
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Haley L. Kravitz
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Bret D. Freudenthal
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Amy M. Whitaker
- Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
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13
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Chaudhuri R, Prasanth T, Biswas D, Mandal S, Dash J. Combating multidrug-resistance in S. pneumoniae: a G-quadruplex binding inhibitor of efflux pump and its bio-orthogonal assembly. NAR MOLECULAR MEDICINE 2024; 1:ugae005. [PMID: 38694210 PMCID: PMC11059089 DOI: 10.1093/narmme/ugae005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/26/2024] [Accepted: 04/10/2024] [Indexed: 05/04/2024]
Abstract
Antibiotic resistance poses a significant global health threat, necessitating innovative strategies to combat multidrug-resistant bacterial infections. Streptococcus pneumoniae, a pathogen responsible for various infections, harbors highly conserved DNA quadruplexes in genes linked to its pathogenesis. In this study, we introduce a novel approach to counter antibiotic resistance by stabilizing G-quadruplex structures within the open reading frames of key resistance-associated genes (pmrA, recD and hsdS). We synthesized An4, a bis-anthracene derivative, using Cu(I)-catalyzed azide-alkyne cycloaddition, which exhibited remarkable binding and stabilization of the G-quadruplex in the pmrA gene responsible for drug efflux. An4 effectively permeated multidrug-resistant S. pneumoniae strains, leading to a substantial 12.5-fold reduction in ciprofloxacin resistance. Furthermore, An4 downregulated pmrA gene expression, enhancing drug retention within bacterial cells. Remarkably, the pmrA G-quadruplex cloned into the pET28a(+) plasmid transformed into Escherichia coli BL21 cells can template Cu-free bio-orthogonal synthesis of An4 from its corresponding alkyne and azide fragments. This study presents a pioneering strategy to combat antibiotic resistance by genetically reducing drug efflux pump expression through G-quadruplex stabilization, offering promising avenues for addressing antibiotic resistance.
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Affiliation(s)
- Ritapa Chaudhuri
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, West-Bengal 700032, India
| | - Thumpati Prasanth
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, West-Bengal 700032, India
| | - Debasmita Biswas
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, West-Bengal 700032, India
| | - Subhranshu Mandal
- Laboratory Medicine, Chittaranjan National Cancer Institute, Kolkata, West Bengal 700156, India
| | - Jyotirmayee Dash
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, West-Bengal 700032, India
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14
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Wang Y, Wang J, Yan Z, Hou J, Wan L, Yang Y, Liu Y, Yi J, Guo P, Han D. Structural investigation of pathogenic RFC1 AAGGG pentanucleotide repeats reveals a role of G-quadruplex in dysregulated gene expression in CANVAS. Nucleic Acids Res 2024; 52:2698-2710. [PMID: 38266156 PMCID: PMC10954463 DOI: 10.1093/nar/gkae032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/04/2024] [Accepted: 01/08/2024] [Indexed: 01/26/2024] Open
Abstract
An expansion of AAGGG pentanucleotide repeats in the replication factor C subunit 1 (RFC1) gene is the genetic cause of cerebellar ataxia, neuropathy, and vestibular areflexia syndrome (CANVAS), and it also links to several other neurodegenerative diseases including the Parkinson's disease. However, the pathogenic mechanism of RFC1 AAGGG repeat expansion remains enigmatic. Here, we report that the pathogenic RFC1 AAGGG repeats form DNA and RNA parallel G-quadruplex (G4) structures that play a role in impairing biological processes. We determine the first high-resolution nuclear magnetic resonance (NMR) structure of a bimolecular parallel G4 formed by d(AAGGG)2AA and reveal how AAGGG repeats fold into a higher-order structure composed of three G-tetrad layers, and further demonstrate the formation of intramolecular G4s in longer DNA and RNA repeats. The pathogenic AAGGG repeats, but not the nonpathogenic AAAAG repeats, form G4 structures to stall DNA replication and reduce gene expression via impairing the translation process in a repeat-length-dependent manner. Our results provide an unprecedented structural basis for understanding the pathogenic mechanism of AAGGG repeat expansion associated with CANVAS. In addition, the high-resolution structures resolved in this study will facilitate rational design of small-molecule ligands and helicases targeting G4s formed by AAGGG repeats for therapeutic interventions.
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Affiliation(s)
- Yang Wang
- School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Junyan Wang
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Zhenzhen Yan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Jianing Hou
- Institute of Molecular Medicine (IMM) Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Liqi Wan
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Yingquan Yang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, Guangdong 510006, China
| | - Yu Liu
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Jie Yi
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Pei Guo
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Da Han
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
- Institute of Molecular Medicine (IMM) Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
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15
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Giraud G, Rodà M, Huchon P, Michelet M, Maadadi S, Jutzi D, Montserret R, Ruepp MD, Parent R, Combet C, Zoulim F, Testoni B. G-quadruplexes control hepatitis B virus replication by promoting cccDNA transcription and phase separation in hepatocytes. Nucleic Acids Res 2024; 52:2290-2305. [PMID: 38113270 PMCID: PMC10954475 DOI: 10.1093/nar/gkad1200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 11/12/2023] [Accepted: 12/05/2023] [Indexed: 12/21/2023] Open
Abstract
Phase separation regulates fundamental processes in gene expression and is mediated by the local concentration of proteins and nucleic acids, as well as nucleic acid secondary structures such as G-quadruplexes (G4s). These structures play fundamental roles in both host gene expression and in viral replication due to their peculiar localisation in regulatory sequences. Hepatitis B virus (HBV) covalently closed circular DNA (cccDNA) is an episomal minichromosome whose persistence is at the basis of chronic infection. Identifying the mechanisms controlling its transcriptional activity is indispensable to develop new therapeutic strategies against chronic hepatitis B. The aim of this study was to determine whether G4s are formed in cccDNA and regulate viral replication. Combining biochemistry and functional studies, we demonstrate that cccDNA indeed contains ten G4s structures. Furthermore, mutations disrupting two G4s located in the enhancer I HBV regulatory region altered cccDNA transcription and viral replication. Finally, we showed for the first time that cccDNA undergoes phase separation in a G4-dependent manner to promote its transcription in infected hepatocytes. Altogether, our data give new insight in the transcriptional regulation of the HBV minichromosome that might pave the way for the identification of novel targets to destabilize or silence cccDNA.
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Affiliation(s)
- Guillaume Giraud
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
| | - Mélanie Rodà
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
| | - Pélagie Huchon
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
- Université Claude-Bernard Lyon I, 69003 Lyon, France
| | - Maud Michelet
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
| | - Sarah Maadadi
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 lyon, france; université claude-bernard lyon i, 69003 Lyon, France
| | - Daniel Jutzi
- United Kingdom Dementia Research Institute Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, Maurice Wohl Clinical Neuroscience Institute, WC2R 2LS London, UK
| | - Roland Montserret
- Molecular Microbiology and Structural Biochemistry (MMSB) UMR 5086 CNRS/Université de Lyon, Labex Ecofect, 7 Passage du Vercors 69367Lyon, France
| | - Marc-David Ruepp
- United Kingdom Dementia Research Institute Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, Maurice Wohl Clinical Neuroscience Institute, WC2R 2LS London, UK
| | - Romain Parent
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
| | - Christophe Combet
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
| | - Fabien Zoulim
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
- Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Service, Hospices Civils de Lyon, 69004 Lyon, France
| | - Barbara Testoni
- INSERM U1052, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR)-5286, Cancer Research Center of Lyon, 69003 Lyon, France; Université Claude-Bernard Lyon I, 69003 Lyon, France
- Hepatology Institute of Lyon, 69004 Lyon, France
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16
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Datta S, Patel M, Sathyaseelan C, Ghosh C, Mudgal A, Patel D, Rathinavelan T, Singh U. G-quadruplex landscape and its regulation revealed by a new antibody capture method. Oncotarget 2024; 15:175-198. [PMID: 38484151 PMCID: PMC10939474 DOI: 10.18632/oncotarget.28564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 02/12/2024] [Indexed: 03/17/2024] Open
Abstract
Our understanding of DNA G-quadruplexes (G4s) from in vitro studies has been complemented by genome-wide G4 landscapes from cultured cells. Conventionally, the formation of G4s is accepted to depend on G-repeats such that they form tetrads. However, genome-wide G4s characterized through high-throughput sequencing suggest that these structures form at a large number of regions with no such canonical G4-forming signatures. Many G4-binding proteins have been described with no evidence for any protein that binds to and stabilizes G4s. It remains unknown what fraction of G4s formed in human cells are protein-bound. The G4-chromatin immunoprecipitation (G4-ChIP) method hitherto employed to describe G4 landscapes preferentially reports G4s that get crosslinked to proteins in their proximity. Our current understanding of the G4 landscape is biased against representation of G4s which escape crosslinking as they are not stabilized by protein-binding and presumably transient. We report a protocol that captures G4s from the cells efficiently without any bias as well as eliminates the detection of G4s formed artifactually on crosslinked sheared chromatin post-fixation. We discover that G4s form sparingly at SINEs. An application of this method shows that depletion of a repeat-binding protein CGGBP1 enhances net G4 capture at CGGBP1-dependent CTCF-binding sites and regions of sharp interstrand G/C-skew transitions. Thus, we present an improved method for G4 landscape determination and by applying it we show that sequence property-specific constraints of the nuclear environment mitigate G4 formation.
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Affiliation(s)
- Subhamoy Datta
- HoMeCell Lab, Discipline of Biological Engineering, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat 382355, India
| | - Manthan Patel
- Centre for Genomics and Child Health, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Chakkarai Sathyaseelan
- Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi Campus, Telangana 502285, India
| | - Chandrama Ghosh
- Azrieli Faculty of Medicine, Bar-Ilan University, Henrietta Szold 8A, Safed 1311502, Israel
| | - Akanksha Mudgal
- Department of Biopharmacy, Medical University of Lublin, Lublin 20059, Poland
| | - Divyesh Patel
- Research Programs Unit, Applied Tumor Genomics Program, Faculty of Medicine, University of Helsinki, Biomedicum, Helsinki 00290, Finland
| | | | - Umashankar Singh
- HoMeCell Lab, Discipline of Biological Engineering, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat 382355, India
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17
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Han X, Xu S, Wang L, Bi Z, Wang D, Bu H, Da J, Liu Y, Tan W. Artificial DNA Framework Channel Modulates Antiapoptotic Behavior in Ischemia-Stressed Cells via Destabilizing Promoter G-Quadruplex. ACS NANO 2024; 18:6147-6161. [PMID: 38372229 DOI: 10.1021/acsnano.3c06563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Regulating folding/unfolding of gene promoter G-quadruplexes (G4s) is important for understanding the topological changes in genomic DNAs and the biological effects of such changes on important cellular events. Although many G4-stabilizing ligands have been screened out, effective G4-destabilizing ligands are extremely rare, posing a great challenge for illustrating how G4 destabilization affects gene function in living cells under stress, a long-standing question in neuroscience. Herein, we report a distinct methodology able to destabilize gene promoter G4s in ischemia-stressed neural cells by mitigating the ischemia-induced accumulation of intracellular K+ with an artificial membrane-spanning DNA framework channel (DFC). We also show that ischemia-triggered K+ influx is positively correlated to anomalous stabilization of promoter G4s and downregulation of Bcl-2, an antiapoptotic gene with neuroprotective effects against ischemic injury. Intriguingly, the DFC enables rapid transmembrane transport of excessive K+ mediated by the internal G4 filter, leading to the destabilization of endogenous promoter G4 in Bcl-2 and subsequent turnover of gene expression at both transcription and translation levels under ischemia. Consequently, this work enriches our understanding of the biological roles of endogenous G4s and may offer important clues to study the cellular behaviors in response to stress.
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Affiliation(s)
- Xiaoyan Han
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Shujuan Xu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Linlin Wang
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Zhengyan Bi
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Dan Wang
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Huitong Bu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Jun Da
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Yanlan Liu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
| | - Weihong Tan
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China
- The Key Laboratory of Zhejiang Province for Aptamers and Theranostics, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
- Institute of Molecular Medicine (IMM), Renji Hospital, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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18
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Leuzzi G, Vasciaveo A, Taglialatela A, Chen X, Firestone TM, Hickman AR, Mao W, Thakar T, Vaitsiankova A, Huang JW, Cuella-Martin R, Hayward SB, Kesner JS, Ghasemzadeh A, Nambiar TS, Ho P, Rialdi A, Hebrard M, Li Y, Gao J, Gopinath S, Adeleke OA, Venters BJ, Drake CG, Baer R, Izar B, Guccione E, Keogh MC, Guerois R, Sun L, Lu C, Califano A, Ciccia A. SMARCAL1 is a dual regulator of innate immune signaling and PD-L1 expression that promotes tumor immune evasion. Cell 2024; 187:861-881.e32. [PMID: 38301646 PMCID: PMC10980358 DOI: 10.1016/j.cell.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 07/23/2023] [Accepted: 01/05/2024] [Indexed: 02/03/2024]
Abstract
Genomic instability can trigger cancer-intrinsic innate immune responses that promote tumor rejection. However, cancer cells often evade these responses by overexpressing immune checkpoint regulators, such as PD-L1. Here, we identify the SNF2-family DNA translocase SMARCAL1 as a factor that favors tumor immune evasion by a dual mechanism involving both the suppression of innate immune signaling and the induction of PD-L1-mediated immune checkpoint responses. Mechanistically, SMARCAL1 limits endogenous DNA damage, thereby suppressing cGAS-STING-dependent signaling during cancer cell growth. Simultaneously, it cooperates with the AP-1 family member JUN to maintain chromatin accessibility at a PD-L1 transcriptional regulatory element, thereby promoting PD-L1 expression in cancer cells. SMARCAL1 loss hinders the ability of tumor cells to induce PD-L1 in response to genomic instability, enhances anti-tumor immune responses and sensitizes tumors to immune checkpoint blockade in a mouse melanoma model. Collectively, these studies uncover SMARCAL1 as a promising target for cancer immunotherapy.
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Affiliation(s)
- Giuseppe Leuzzi
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Alessandro Vasciaveo
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Angelo Taglialatela
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Xiao Chen
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | | | | | - Wendy Mao
- Columbia Center for Translational Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Tanay Thakar
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Alina Vaitsiankova
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jen-Wei Huang
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Raquel Cuella-Martin
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Samuel B Hayward
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jordan S Kesner
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Ali Ghasemzadeh
- Columbia Center for Translational Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Tarun S Nambiar
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Patricia Ho
- Columbia Center for Translational Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Medicine, Division of Hematology and Oncology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Alexander Rialdi
- Center for OncoGenomics and Innovative Therapeutics (COGIT), Center for Therapeutics Discovery, Department of Oncological Sciences and Pharmacological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Maxime Hebrard
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Yinglu Li
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jinmei Gao
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | | | | | | | - Charles G Drake
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Columbia Center for Translational Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Urology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Richard Baer
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Benjamin Izar
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA; Columbia Center for Translational Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Medicine, Division of Hematology and Oncology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Ernesto Guccione
- Center for OncoGenomics and Innovative Therapeutics (COGIT), Center for Therapeutics Discovery, Department of Oncological Sciences and Pharmacological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | | | - Raphael Guerois
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Lu Sun
- EpiCypher Inc., Durham, NC 27709, USA
| | - Chao Lu
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Andrea Califano
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Biochemistry and Molecular Biophysics, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Alberto Ciccia
- Department of Genetics and Development, Columbia University Irving Medical Center, New York, NY 10032, USA; Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA; Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, NY 10032, USA.
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19
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Nadai M, Doria F, Frasson I, Perrone R, Pirota V, Bergamaschi G, Freccero M, Richter SN. Naphthalene Diimide-Tetraazacycloalkane Conjugates Are G-Quadruplex-Based HIV-1 Inhibitors with a Dual Mode of Action. ACS Infect Dis 2024; 10:489-499. [PMID: 38175706 PMCID: PMC10862543 DOI: 10.1021/acsinfecdis.3c00453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 01/05/2024]
Abstract
Human immunodeficiency virus 1 (HIV-1) therapeutic regimens consist of three or more drugs targeting different steps of the viral life cycle to limit the emergence of viral resistance. In line with the multitargeting strategy, here we conjugated a naphthalene diimide (NDI) moiety with a tetraazacycloalkane to obtain novel naphthalene diimide (NDI)-tetraazacycloalkane conjugates. The NDI inhibits the HIV-1 promoter activity by binding to LTR G-quadruplexes, and the tetraazacycloalkane mimics AMD3100, which blocks HIV entry into cells by interfering with the CXCR4 coreceptor. We synthesized, purified, and tested the metal-free NDI-tetraazacycloalkane conjugate and the two derived metal-organic complexes (MOCs) that incorporate Cu2+ and Zn2+. The NDI-MOCs showed enhanced binding to LTR G4s as assessed by FRET and CD assays in vitro. They also showed enhanced activity in cells where they dose-dependently reduced LTR promoter activity and inhibited viral entry only of the HIV-1 strain that exploited the CXCR4 coreceptor. The time of addition assay confirmed the dual targeting at the different HIV-1 steps. Our results indicate that the NDI-MOC conjugates can simultaneously inhibit viral entry, by targeting the CXCR4 coreceptor, and LTR promoter activity, by stabilizing the LTR G-quadruplexes. The approach of combining multiple targets in a single compound may streamline treatment regimens and improve the overall patient outcomes.
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Affiliation(s)
- Matteo Nadai
- Department
of Molecular Medicine, University of Padua, Via Gabelli 63, 35121 Padua, Italy
| | - Filippo Doria
- Department
of Chemistry, University of Pavia, V.le Taramelli 10, 27100 Pavia, Italy
| | - Ilaria Frasson
- Department
of Molecular Medicine, University of Padua, Via Gabelli 63, 35121 Padua, Italy
| | - Rosalba Perrone
- Buck
Institute for Research on Aging, Novato, California 94945, United States
| | - Valentina Pirota
- Department
of Chemistry, University of Pavia, V.le Taramelli 10, 27100 Pavia, Italy
| | - Greta Bergamaschi
- National
Research Council of Italy, Istituto di Scienze e Tecnologie Chimiche
“Giulio Natta” (SCITEC–CNR), Via Mario Bianco 9, 20131 Milano, Italy
| | - Mauro Freccero
- Department
of Chemistry, University of Pavia, V.le Taramelli 10, 27100 Pavia, Italy
| | - Sara N. Richter
- Department
of Molecular Medicine, University of Padua, Via Gabelli 63, 35121 Padua, Italy
- Microbiology
and Virology Unit, Padua University Hospital, 35121 Padua, Italy
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20
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Paez‐Perez M, Kuimova MK. Molecular Rotors: Fluorescent Sensors for Microviscosity and Conformation of Biomolecules. Angew Chem Int Ed Engl 2024; 63:e202311233. [PMID: 37856157 PMCID: PMC10952837 DOI: 10.1002/anie.202311233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/17/2023] [Accepted: 10/17/2023] [Indexed: 10/20/2023]
Abstract
The viscosity and crowding of biological environment are considered vital for the correct cellular function, and alterations in these parameters are known to underly a number of pathologies including diabetes, malaria, cancer and neurodegenerative diseases, to name a few. Over the last decades, fluorescent molecular probes termed molecular rotors proved extremely useful for exploring viscosity, crowding, and underlying molecular interactions in biologically relevant settings. In this review, we will discuss the basic principles underpinning the functionality of these probes and will review advances in their use as sensors for lipid order, protein crowding and conformation, temperature and non-canonical nucleic acid structures in live cells and other relevant biological settings.
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Affiliation(s)
- Miguel Paez‐Perez
- Department of Chemistry, Imperial College London, MSRHImperial College LondonWood LaneLondonW12 0BZUK
| | - Marina K. Kuimova
- Department of Chemistry, Imperial College London, MSRHImperial College LondonWood LaneLondonW12 0BZUK
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21
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Fleming AM, Jenkins BLGC, Buck BA, Burrows CJ. DNA Damage Accelerates G-Quadruplex Folding in a Duplex-G-Quadruplex-Duplex Context. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.20.576387. [PMID: 38293204 PMCID: PMC10827223 DOI: 10.1101/2024.01.20.576387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Molecular details for DNA damage impact on the folding of potential G-quadruplex sequences (PQS) to non-canonical DNA structures that are involved in gene regulation are poorly understood. Here, the effects of DNA base damage and strand breaks on PQS folding kinetics were studied in the context of the VEGF promoter sequence embedded between two DNA duplex anchors, referred to as a duplex-G-quadruplex-duplex (DGD) motif. This DGD scaffold imposes constraints on the PQS folding process that more closely mimic those found in genomic DNA. Folding kinetics were monitored by circular dichroism (CD) to find folding half-lives ranging from 2 s to 12 min depending on the DNA damage type and sequence position. The presence of Mg2+ ions and the G-quadruplex (G4)-binding protein APE1 facilitated the folding reactions. A strand break placing all four G runs required for G4 formation on one side of the break accelerated the folding rate by >150-fold compared to the undamaged sequence. Combined 1D 1H-NMR and CD analyses confirmed that isothermal folding of the VEGF-DGD constructs yielded spectral signatures that suggest formation of G4 motifs, and demonstrated a folding dependency with the nature and location of DNA damage. Importantly, the PQS folding half-lives measured are relevant to replication, transcription, and DNA repair time frames.
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Affiliation(s)
- Aaron M Fleming
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112-0850 United States
| | | | - Bethany A Buck
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112-0850 United States
| | - Cynthia J Burrows
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112-0850 United States
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22
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De Rache A, Marquevielle J, Bouaziz S, Vialet B, Andreola ML, Mergny JL, Amrane S. Structure of a DNA G-quadruplex that Modulates SP1 Binding Sites Architecture in HIV-1 Promoter. J Mol Biol 2024; 436:168359. [PMID: 37952768 DOI: 10.1016/j.jmb.2023.168359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
Nucleic acid sequences containing guanine tracts are able to form non-canonical DNA or RNA structures known as G-quadruplexes (or G4s). These structures, based on the stacking of G-tetrads, are involved in various biological processes such as gene expression regulation. Here, we investigated a G4 forming sequence, HIVpro2, derived from the HIV-1 promoter. This motif is located 60 nucleotides upstream of the proviral Transcription Starting Site (TSS) and overlaps with two SP1 transcription factor binding sites. Using NMR spectroscopy, we determined that HIVpro2 forms a hybrid type G4 structure with a core that is interrupted by a single nucleotide bulge. An additional reverse-Hoogsteen AT base pair is stacked on top of the tetrad. SP1 transcription factor is known to regulate transcription activity of many genes through the recognition of Guanine-rich duplex motifs. Here, the formation of HIVpro2 G4 may modulate SP1 binding sites architecture by competing with the formation of the canonical duplex structure. Such DNA structural switch potentially participates to the regulation of viral transcription and may also interfere with HIV-1 reactivation or viral latency.
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Affiliation(s)
- Aurore De Rache
- Université de Bordeaux, Bordeaux, France; ARNA Laboratory, INSERM U1212, CNRS UMR 5320, IECB, Bordeaux, France; Department of Chemistry, U. Namur, 61 rue de Bruxelles, B5000 Namur, Belgium
| | - Julien Marquevielle
- Université de Bordeaux, Bordeaux, France; ARNA Laboratory, INSERM U1212, CNRS UMR 5320, IECB, Bordeaux, France
| | | | - Brune Vialet
- Université de Bordeaux, Bordeaux, France; ARNA Laboratory, INSERM U1212, CNRS UMR 5320, IECB, Bordeaux, France
| | - Marie-Line Andreola
- Université de Bordeaux, Bordeaux, France; MFP Laboratory, UMR5234, CNRS, Bordeaux, France
| | - Jean-Louis Mergny
- Laboratoire d'Optique & Biosciences, École Polytechnique, CNRS, Inserm, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Samir Amrane
- Université de Bordeaux, Bordeaux, France; ARNA Laboratory, INSERM U1212, CNRS UMR 5320, IECB, Bordeaux, France.
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23
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Sale JE, Stoddard BL. Fifty years of Nucleic Acids Research. Nucleic Acids Res 2024; 52:1-3. [PMID: 38178306 PMCID: PMC10783492 DOI: 10.1093/nar/gkad1156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 01/06/2024] Open
Affiliation(s)
- Julian E Sale
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Barry L Stoddard
- Division of Basic Sciences, Fred Hutchinson Cancer Center, 1100 Fairview Ave. N., Seattle WA 98109, USA
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24
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Robinson J, Stenspil SG, Maleckaite K, Bartlett M, Di Antonio M, Vilar R, Kuimova MK. Cellular Visualization of G-Quadruplex RNA via Fluorescence- Lifetime Imaging Microscopy. J Am Chem Soc 2024; 146:1009-1018. [PMID: 38151240 PMCID: PMC10786036 DOI: 10.1021/jacs.3c11908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/29/2023]
Abstract
Over the past decade, appreciation of the roles of G-quadruplex (G4) structures in cellular regulation and maintenance has rapidly grown, making the establishment of robust methods to visualize G4s increasingly important. Fluorescent probes are commonly used for G4 detection in vitro; however, achieving sufficient selectivity to detect G4s in a dense and structurally diverse cellular environment is challenging. The use of fluorescent probes for G4 detection is further complicated by variations of probe uptake into cells, which may affect fluorescence intensity independently of G4 abundance. In this work, we report an alternative small-molecule approach to visualize G4s that does not rely on fluorescence intensity switch-on and, thus, does not require the use of molecules with exclusive G4 binding selectivity. Specifically, we have developed a novel thiazole orange derivative, TOR-G4, that exhibits a unique fluorescence lifetime when bound to G4s compared to other structures, allowing G4 binding to be sensitively distinguished from non-G4 binding, independent of the local probe concentration. Furthermore, TOR-G4 primarily colocalizes with RNA in the cytoplasm and nucleoli of cells, making it the first lifetime-based probe validated for exploring the emerging roles of RNA G4s in cellulo.
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Affiliation(s)
- Jenna Robinson
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
- The
Francis Crick Institute, 1 Midland Road, London NW1 1AT, U.K.
| | - Stine G. Stenspil
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
| | - Karolina Maleckaite
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
| | - Molly Bartlett
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
| | - Marco Di Antonio
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
- The
Francis Crick Institute, 1 Midland Road, London NW1 1AT, U.K.
| | - Ramon Vilar
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
| | - Marina K. Kuimova
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
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25
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Mitteaux J, Raevens S, Wang Z, Pirrotta M, Valverde IE, Hudson RHE, Monchaud D. PhpC modulates G-quadruplex-RNA landscapes in human cells. Chem Commun (Camb) 2024; 60:424-427. [PMID: 38086624 DOI: 10.1039/d3cc05155b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Stabilizing DNA/RNA G-quadruplexes (G4s) using small molecules (ligands) has proven an efficient strategy to decipher G4 biology. Quite paradoxically, this search has also highlighted the need for finding molecules able to disrupt G4s to tackle G4-associated cellular dysfunctions. We report here on both qualitative and quantitative investigations that validate the G4-RNA-destabilizing properties of the leading compound PhpC in human cells.
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Affiliation(s)
- Jérémie Mitteaux
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), CNRS UMR 6302, 9, avenue Alain Savary, Dijon 21078, France.
| | - Sandy Raevens
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), CNRS UMR 6302, 9, avenue Alain Savary, Dijon 21078, France.
| | - Zi Wang
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
| | - Marc Pirrotta
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), CNRS UMR 6302, 9, avenue Alain Savary, Dijon 21078, France.
| | - Ibai E Valverde
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), CNRS UMR 6302, 9, avenue Alain Savary, Dijon 21078, France.
| | - Robert H E Hudson
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
| | - David Monchaud
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), CNRS UMR 6302, 9, avenue Alain Savary, Dijon 21078, France.
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26
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Laspata N, Muoio D, Fouquerel E. Multifaceted Role of PARP1 in Maintaining Genome Stability Through Its Binding to Alternative DNA Structures. J Mol Biol 2024; 436:168207. [PMID: 37481154 DOI: 10.1016/j.jmb.2023.168207] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/28/2023] [Accepted: 07/12/2023] [Indexed: 07/24/2023]
Abstract
Alternative DNA structures that differ from the canonical B-form of DNA can arise from repetitive sequences and play beneficial roles in many cellular processes such as gene regulation and chromatin organization. However, they also threaten genomic stability in several ways including mutagenesis and collisions with replication and/or transcription machinery, which lead to genomic instability that is associated with human disease. Thus, the careful regulation of non-B-DNA structure formation and resolution is crucial for the maintenance of genome integrity. Several protein factors have been demonstrated to associate with alternative DNA structures to facilitate their removal, one of which is the ADP-ribose transferase (ART) PARP1 (also called ADP-ribosyltransferase diphtheria toxin-like 1 or ARTD1), a multifaceted DNA repair enzyme that recognizes single- and double-stranded DNA breaks and synthesizes chains of poly (ADP-ribose) (PAR) to recruit DNA repair proteins. It is now well appreciated that PARP1 recognizes several nucleic acid structures beyond DNA lesions, including stalled replication forks, DNA hairpins and cruciforms, R-loops, and DNA G-quadruplexes (G4 DNA). In this review, we summarize the current evidence of a direct association of PARP1 with each of these aforementioned alternative DNA structures, as well as discuss the role of PARP1 in the prevention of non-B-DNA structure-induced genetic instability. We will focus on the mechanisms of the recognition and binding by PARP1 to each alternative structure and the structure-based stimulation of PARP1 catalytic activity upon binding. Finally, we will discuss some of the outstanding gaps in the literature and offer speculative insight for questions that remain to be experimentally addressed.
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Affiliation(s)
- Natalie Laspata
- UPMC Hillman Cancer Center, University of Pittsburgh Cancer Institute, Department of Pharmacology and Chemical Biology, Pittsburgh, PA 15232, USA; Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Daniela Muoio
- UPMC Hillman Cancer Center, University of Pittsburgh Cancer Institute, Department of Pharmacology and Chemical Biology, Pittsburgh, PA 15232, USA
| | - Elise Fouquerel
- UPMC Hillman Cancer Center, University of Pittsburgh Cancer Institute, Department of Pharmacology and Chemical Biology, Pittsburgh, PA 15232, USA.
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27
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Fazelifar P, Cucchiarini A, Khoshbin Z, Mergny JL, Kazemi Noureini S. Strong and selective interactions of palmatine with G-rich sequences in TRF2 promoter; experimental and computational studies. J Biomol Struct Dyn 2023:1-15. [PMID: 38100552 DOI: 10.1080/07391102.2023.2292793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 11/25/2023] [Indexed: 12/17/2023]
Abstract
G-rich sequences have the potential to fold into G-quadruplexes (GQs). G-quadruplexes, particularly those positioned in the regulatory regions of proto-oncogenes, have recently garnered attention in anti-cancer drug design. A thermal FRET assay was employed to conduct preliminary screening of various alkaloids, aiming to identify stronger interactions with a specific set of G-rich double-labeled oligonucleotides in both K + and Na + buffers. These oligonucleotides were derived from regions associated with Kit, Myc, Ceb, Bcl2, human telomeres, and potential G-quadruplex forming sequences found in the Nrf2 and Trf2 promoters. Palmatine generally increased the stability of different G-rich sequences into their folded GQ structures, more or less in a concentration dependent manner. The thermal stability and interaction of palmatine was further studied using transition FRET (t-FRET), CD and UV-visible spectroscopy and molecular dynamics simulation methods. Palmatine showed the strongest interaction with T RF2 in both K+ and Na+ buffers even at equimolar concentration ratio. T-FRET studies revealed that palmatine has the potential to disrupt double-strand formation by the T RF2 sequence in the presence of its complementary strand. Palmatine exhibits a stronger interaction with G-rich strand DNA, promoting its folding into G-quadruplex structures. It is noteworthy that palmatine exhibits the strongest interaction with T RF2, which is the shortest sequence among the G-rich oligonucleotides studied, featuring only one nucleotide for two of its loops. Palmatine represents a suitable structure for drug design to develop more specific ligands targeting G-quadruplexes. Whether palmatine can also affect the expression of the T RF2 gene requires further studies.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Pegah Fazelifar
- Department of Biology, Faculty of Basic Science, Hakim Sabzevari University, Sabzevar, Iran
| | - Anne Cucchiarini
- Laboratoire d'Optique et Biosciences (LOB), Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, Palaiseau, France
| | - Zahra Khoshbin
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Jean-Louis Mergny
- Laboratoire d'Optique et Biosciences (LOB), Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, Palaiseau, France
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Maltby CJ, Krans A, Grudzien SJ, Palacios Y, Muiños J, Suárez A, Asher M, Khurana V, Barmada SJ, Dijkstra AA, Todd PK. AAGGG repeat expansions trigger RFC1-independent synaptic dysregulation in human CANVAS Neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.13.571345. [PMID: 38168171 PMCID: PMC10760133 DOI: 10.1101/2023.12.13.571345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Cerebellar ataxia with neuropathy and vestibular areflexia syndrome (CANVAS) is a late onset, recessively inherited neurodegenerative disorder caused by biallelic, non-reference pentameric AAGGG(CCCTT) repeat expansions within the second intron of replication factor complex subunit 1 (RFC1). To investigate how these repeats cause disease, we generated CANVAS patient induced pluripotent stem cell (iPSC) derived neurons (iNeurons) and utilized calcium imaging and transcriptomic analysis to define repeat-elicited gain-of-function and loss-of-function contributions to neuronal toxicity. AAGGG repeat expansions do not alter neuronal RFC1 splicing, expression, or DNA repair pathway functions. In reporter assays, AAGGG repeats are translated into pentapeptide repeat proteins that selectively accumulate in CANVAS patient brains. However, neither these proteins nor repeat RNA foci were detected in iNeurons, and overexpression of these repeats in isolation did not induce neuronal toxicity. CANVAS iNeurons exhibit defects in neuronal development and diminished synaptic connectivity that is rescued by CRISPR deletion of a single expanded allele. These phenotypic deficits were not replicated by knockdown of RFC1 in control neurons and were not rescued by ectopic expression of RFC1. These findings support a repeat-dependent but RFC1-independent cause of neuronal dysfunction in CANVAS, with important implications for therapeutic development in this currently untreatable condition.
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Affiliation(s)
- Connor J. Maltby
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - Amy Krans
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- Ann Arbor Veterans Administration Healthcare, Ann Arbor, MI, USA
| | - Samantha J. Grudzien
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI, USA
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
| | - Yomira Palacios
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- Postbaccalaureate Research Education Program, University of Michigan, Ann Arbor, MI, USA
| | - Jessica Muiños
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- UM SMART Undergraduate Summer Program, University of Michigan, Ann Arbor, MI, USA
| | - Andrea Suárez
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- Postbaccalaureate Research Education Program, University of Michigan, Ann Arbor, MI, USA
| | - Melissa Asher
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - Vikram Khurana
- Department of Neurology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Sami J. Barmada
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - Anke A. Dijkstra
- Department of Pathology, Amsterdam UMC, Amsterdam Neuroscience, Amsterdam, The Netherlands
- Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands
| | - Peter K. Todd
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- Ann Arbor Veterans Administration Healthcare, Ann Arbor, MI, USA
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29
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Raguseo F, Wang Y, Li J, Petrić Howe M, Balendra R, Huyghebaert A, Vadukul DM, Tanase DA, Maher TE, Malouf L, Rubio-Sánchez R, Aprile FA, Elani Y, Patani R, Di Michele L, Di Antonio M. The ALS/FTD-related C9orf72 hexanucleotide repeat expansion forms RNA condensates through multimolecular G-quadruplexes. Nat Commun 2023; 14:8272. [PMID: 38092738 PMCID: PMC10719400 DOI: 10.1038/s41467-023-43872-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 11/21/2023] [Indexed: 12/17/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are neurodegenerative diseases that exist on a clinico-pathogenetic spectrum, designated ALS/FTD. The most common genetic cause of ALS/FTD is expansion of the intronic hexanucleotide repeat (GGGGCC)n in C9orf72. Here, we investigate the formation of nucleic acid secondary structures in these expansion repeats, and their role in generating condensates characteristic of ALS/FTD. We observe significant aggregation of the hexanucleotide sequence (GGGGCC)n, which we associate to the formation of multimolecular G-quadruplexes (mG4s) by using a range of biophysical techniques. Exposing the condensates to G4-unfolding conditions leads to prompt disassembly, highlighting the key role of mG4-formation in the condensation process. We further validate the biological relevance of our findings by detecting an increased prevalence of G4-structures in C9orf72 mutant human motor neurons when compared to healthy motor neurons by staining with a G4-selective fluorescent probe, revealing signal in putative condensates. Our findings strongly suggest that RNA G-rich repetitive sequences can form protein-free condensates sustained by multimolecular G-quadruplexes, highlighting their potential relevance as therapeutic targets for C9orf72 mutation-related ALS/FTD.
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Affiliation(s)
- Federica Raguseo
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
- University of Cambridge, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Imperial College London, Institute of Chemical Biology, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
| | - Yiran Wang
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Jessica Li
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Marija Petrić Howe
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Rubika Balendra
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Anouk Huyghebaert
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
- Imperial College London, Institute of Chemical Biology, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
| | - Devkee M Vadukul
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
| | - Diana A Tanase
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
- University of Cambridge, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Thomas E Maher
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
- Imperial College London, Institute of Chemical Biology, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
| | - Layla Malouf
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
- University of Cambridge, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Roger Rubio-Sánchez
- University of Cambridge, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Francesco A Aprile
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
- Imperial College London, Institute of Chemical Biology, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK
| | - Yuval Elani
- Imperial College London, Department of Chemical Engineering, South Kensington, London, SW7 2AZ, UK
| | - Rickie Patani
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK.
| | - Lorenzo Di Michele
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK.
- University of Cambridge, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK.
| | - Marco Di Antonio
- Imperial College London, Department of Chemistry, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK.
- Imperial College London, Institute of Chemical Biology, Molecular Sciences Research Hub, 82 Wood Lane, London, W12 0BZ, UK.
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
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30
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Lorenzatti A, Piga EJ, Gismondi M, Binolfi A, Margarit E, Calcaterra N, Armas P. Genetic variations in G-quadruplex forming sequences affect the transcription of human disease-related genes. Nucleic Acids Res 2023; 51:12124-12139. [PMID: 37930868 PMCID: PMC10711447 DOI: 10.1093/nar/gkad948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/22/2023] [Accepted: 10/12/2023] [Indexed: 11/08/2023] Open
Abstract
Guanine-rich DNA strands can fold into non-canonical four-stranded secondary structures named G-quadruplexes (G4s). G4s folded in proximal promoter regions (PPR) are associated either with positive or negative transcriptional regulation. Given that single nucleotide variants (SNVs) affecting G4 folding (G4-Vars) may alter gene transcription, and that SNVs are associated with the human diseases' onset, we undertook a novel comprehensive study of the G4-Vars genome-wide (G4-variome) to find disease-associated G4-Vars located into PPRs. We developed a bioinformatics strategy to find disease-related SNVs located into PPRs simultaneously overlapping with putative G4-forming sequences (PQSs). We studied five G4-Vars disturbing in vitro the folding and stability of the G4s located into PPRs, which had been formerly associated with sporadic Alzheimer's disease (GRIN2B), a severe familiar coagulopathy (F7), atopic dermatitis (CSF2), myocardial infarction (SIRT1) and deafness (LHFPL5). Results obtained in cultured cells for these five G4-Vars suggest that the changes in the G4s affect the transcription, potentially contributing to the development of the mentioned diseases. Collectively, data reinforce the general idea that G4-Vars may impact on the different susceptibilities to human genetic diseases' onset, and could be novel targets for diagnosis and drug design in precision medicine.
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Affiliation(s)
- Agustín Lorenzatti
- Instituto de Biología Molecular y Celular de Rosario (IBR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda, Rosario S2000EZP, Santa Fe, Argentina
| | - Ernesto J Piga
- Instituto de Biología Molecular y Celular de Rosario (IBR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda, Rosario S2000EZP, Santa Fe, Argentina
| | - Mauro Gismondi
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Suipacha 531, Rosario, Santa Fe, Argentina
| | - Andrés Binolfi
- Instituto de Biología Molecular y Celular de Rosario (IBR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda, Rosario S2000EZP, Santa Fe, Argentina
- Plataforma Argentina de Biología Estructural y Metabolómica (PLABEM), Ocampo y Esmeralda, Rosario S200EZP, Santa Fe, Argentina
| | - Ezequiel Margarit
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Suipacha 531, Rosario, Santa Fe, Argentina
| | - Nora B Calcaterra
- Instituto de Biología Molecular y Celular de Rosario (IBR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda, Rosario S2000EZP, Santa Fe, Argentina
| | - Pablo Armas
- Instituto de Biología Molecular y Celular de Rosario (IBR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda, Rosario S2000EZP, Santa Fe, Argentina
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31
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Williams SL, Casas‐Delucchi CS, Raguseo F, Guneri D, Li Y, Minamino M, Fletcher EE, Yeeles JTP, Keyser UF, Waller ZAE, Di Antonio M, Coster G. Replication-induced DNA secondary structures drive fork uncoupling and breakage. EMBO J 2023; 42:e114334. [PMID: 37781931 PMCID: PMC10646557 DOI: 10.15252/embj.2023114334] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 10/03/2023] Open
Abstract
Sequences that form DNA secondary structures, such as G-quadruplexes (G4s) and intercalated-Motifs (iMs), are abundant in the human genome and play various physiological roles. However, they can also interfere with replication and threaten genome stability. Multiple lines of evidence suggest G4s inhibit replication, but the underlying mechanism remains unclear. Moreover, evidence of how iMs affect the replisome is lacking. Here, we reconstitute replication of physiologically derived structure-forming sequences to find that a single G4 or iM arrest DNA replication. Direct single-molecule structure detection within solid-state nanopores reveals structures form as a consequence of replication. Combined genetic and biophysical characterisation establishes that structure stability and probability of structure formation are key determinants of replisome arrest. Mechanistically, replication arrest is caused by impaired synthesis, resulting in helicase-polymerase uncoupling. Significantly, iMs also induce breakage of nascent DNA. Finally, stalled forks are only rescued by a specialised helicase, Pif1, but not Rrm3, Sgs1, Chl1 or Hrq1. Altogether, we provide a mechanism for quadruplex structure formation and resolution during replication and highlight G4s and iMs as endogenous sources of replication stress.
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Affiliation(s)
- Sophie L Williams
- Genome Replication Lab, Division of Cancer Biology, Institute of Cancer ResearchChester Beatty LaboratoriesLondonUK
| | - Corella S Casas‐Delucchi
- Genome Replication Lab, Division of Cancer Biology, Institute of Cancer ResearchChester Beatty LaboratoriesLondonUK
| | - Federica Raguseo
- Chemistry DepartmentImperial College London, MSRHLondonUK
- Institute of Chemical Biology, MSRHLondonUK
| | | | - Yunxuan Li
- Cavendish LaboratoryUniversity of CambridgeCambridgeUK
| | | | | | | | | | | | - Marco Di Antonio
- Chemistry DepartmentImperial College London, MSRHLondonUK
- Institute of Chemical Biology, MSRHLondonUK
- Francis Crick InstituteLondonUK
| | - Gideon Coster
- Genome Replication Lab, Division of Cancer Biology, Institute of Cancer ResearchChester Beatty LaboratoriesLondonUK
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32
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Duardo RC, Guerra F, Pepe S, Capranico G. Non-B DNA structures as a booster of genome instability. Biochimie 2023; 214:176-192. [PMID: 37429410 DOI: 10.1016/j.biochi.2023.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023]
Abstract
Non-canonical secondary structures (NCSs) are alternative nucleic acid structures that differ from the canonical B-DNA conformation. NCSs often occur in repetitive DNA sequences and can adopt different conformations depending on the sequence. The majority of these structures form in the context of physiological processes, such as transcription-associated R-loops, G4s, as well as hairpins and slipped-strand DNA, whose formation can be dependent on DNA replication. It is therefore not surprising that NCSs play important roles in the regulation of key biological processes. In the last years, increasing published data have supported their biological role thanks to genome-wide studies and the development of bioinformatic prediction tools. Data have also highlighted the pathological role of these secondary structures. Indeed, the alteration or stabilization of NCSs can cause the impairment of transcription and DNA replication, modification in chromatin structure and DNA damage. These events lead to a wide range of recombination events, deletions, mutations and chromosomal aberrations, well-known hallmarks of genome instability which are strongly associated with human diseases. In this review, we summarize molecular processes through which NCSs trigger genome instability, with a focus on G-quadruplex, i-motif, R-loop, Z-DNA, hairpin, cruciform and multi-stranded structures known as triplexes.
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Affiliation(s)
- Renée C Duardo
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, via Selmi 3, 40126, Bologna, Italy
| | - Federico Guerra
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, via Selmi 3, 40126, Bologna, Italy
| | - Simona Pepe
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, via Selmi 3, 40126, Bologna, Italy
| | - Giovanni Capranico
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, via Selmi 3, 40126, Bologna, Italy.
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Fleming AM, Omaga CA, Burrows CJ. NEIL3 promoter G-quadruplex with oxidatively modified bases shows magnesium-dependent folding that stalls polymerase bypass. Biochimie 2023; 214:156-166. [PMID: 37437684 PMCID: PMC10592359 DOI: 10.1016/j.biochi.2023.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/14/2023]
Abstract
Oxidative stress unleashes reactive species capable of oxidizing 2'-deoxyguanosine (G) nucleotides in G-rich sequences of the genome, such as the potential G-quadruplex forming sequencing (PQS) in the NEIL3 gene promoter. Oxidative modification of G yields 8-oxo-7,8-dihydro-2'-deoxyguanosine (OG) that can be further oxidized to hydantoin products. Herein, OG was synthesized into the NEIL3 PQS that was allowed to fold to a G-quadruplex (G4) in K+ ion solutions with varying amounts of Mg2+ in the physiological range. The Mg2+ dependency in the oxidatively modified NEIL3 G4 to stall a replicative DNA polymerase was evaluated. The polymerase was found to stall at the G4 or OG, as well as continue to full-length extension with dependency on the location of the modification and the concentration of Mg2+. To provide some clarity on these findings, OG or the hydantoins were synthesized in model NEIL3 G4 folding sequences at the positions of the polymerase study. The model G4 sequences were allowed to fold in K+ ion solutions with varying levels of Mg2+ to identify how the presence of the divalent metal impacted G4 folding depending on the location of the modification. The presence of Mg2+ either caused the transition of the NEIL3 G4 folds from an antiparallel to parallel orientation of the strands or had no impact. Structural models are proposed to understand the findings using the literature as a guide. The biological significance of the results is discussed.
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Affiliation(s)
- Aaron M Fleming
- Department of Chemistry, University of Utah, Salt Lake City, UT, 84112-0850, USA
| | - Carla A Omaga
- Department of Chemistry, University of Utah, Salt Lake City, UT, 84112-0850, USA
| | - Cynthia J Burrows
- Department of Chemistry, University of Utah, Salt Lake City, UT, 84112-0850, USA.
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Swarup N, Cheng J, Choi I, Heo YJ, Kordi M, Aziz M, Arora A, Li F, Chia D, Wei F, Elashoff D, Zhang L, Kim S, Kim Y, Wong DTW. Multi-faceted attributes of salivary cell-free DNA as liquid biopsy biomarkers for gastric cancer detection. Biomark Res 2023; 11:90. [PMID: 37817261 PMCID: PMC10566128 DOI: 10.1186/s40364-023-00524-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/12/2023] [Indexed: 10/12/2023] Open
Abstract
BACKGROUND Recent advances in circulating cell-free DNA (cfDNA) analysis from biofluids have opened new avenues for liquid biopsy (LB). However, current cfDNA LB assays are limited by the availability of existing information on established genotypes associated with tumor tissues. Certain cancers present with a limited list of established mutated cfDNA biomarkers, and thus, nonmutated cfDNA characteristics along with alternative biofluids are needed to broaden the available cfDNA targets for cancer detection. Saliva is an intriguing and accessible biofluid that has yet to be fully explored for its clinical utility for cancer detection. METHODS In this report, we employed a low-coverage single stranded (ss) library NGS pipeline "Broad-Range cell-free DNA-Seq" (BRcfDNA-Seq) using saliva to comprehensively investigate the characteristics of salivary cfDNA (ScfDNA). The identification of cfDNA features has been made possible by applying novel cfDNA processing techniques that permit the incorporation of ultrashort, ss, and jagged DNA fragments. As a proof of concept using 10 gastric cancer (GC) and 10 noncancer samples, we examined whether ScfDNA characteristics, including fragmentomics, end motif profiles, microbial contribution, and human chromosomal mapping, could differentiate between these two groups. RESULTS Individual and integrative analysis of these ScfDNA features demonstrated significant differences between the two cohorts, suggesting that disease state may affect the ScfDNA population by altering nuclear cleavage or the profile of contributory organism cfDNA to total ScfDNA. We report that principal component analysis integration of several aspects of salivary cell-free DNA fragmentomic profiles, genomic element profiles, end-motif sequence patterns, and distinct oral microbiome populations can differentiate the two populations with a p value of < 0.0001 (PC1). CONCLUSION These novel features of ScfDNA characteristics could be clinically useful for improving saliva-based LB detection and the eventual monitoring of local or systemic diseases.
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Affiliation(s)
- Neeti Swarup
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jordan Cheng
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Irene Choi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - You Jeong Heo
- The Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, 06355, Republic of Korea
| | - Misagh Kordi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Mohammad Aziz
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Akanksha Arora
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Indraprastha Institute of Information Technology (IIIT), Delhi, India
| | - Feng Li
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David Chia
- Indraprastha Institute of Information Technology (IIIT), Delhi, India
| | - Fang Wei
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David Elashoff
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Liying Zhang
- Indraprastha Institute of Information Technology (IIIT), Delhi, India
| | - Sung Kim
- Department of Medicine, Biostatistics and Computational Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, 06355, South Korea
| | - Yong Kim
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
| | - David T W Wong
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
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35
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Lu K, Wang HC, Tu YC, Lou PJ, Chang TC, Lin JJ. EGFR suppression contributes to growth inhibitory activity of G-quadruplex ligands in non-small cell lung cancers. Biochem Pharmacol 2023; 216:115788. [PMID: 37683841 DOI: 10.1016/j.bcp.2023.115788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023]
Abstract
Non-small cell lung carcinomas (NSCLCs) commonly harbor activating mutations in the epidermal growth factor receptor (EGFR). Drugs targeting the tyrosine kinase activity of EGFR have shown effectiveness in inhibiting the growth of cancer cells with EGFR mutations. However, the development of additional mutations in cancer cells often leads to the persistence of the disease, necessitating alternative strategies to overcome this challenge. We explored the efficacy of stabilizing the G-quadruplex structure formed in the promoter region of EGFR as a means to suppress its expression and impede the growth of cancer cells with EGFR mutations. We revealed that the carbazole derivative BMVC-8C3O effectively suppressed EGFR expression and demonstrated significant growth inhibition in EGFR-mutated NSCLC cells, both in cell culture and mouse xenograft models. Importantly, the observed repression of EGFR expression and growth inhibition were not exclusive to carbazole derivatives, as several other G-quadruplex ligands exhibited similar effects. The growth-inhibitory activity of BMVC-8C3O is attributed, at least in part, to the repression of EGFR, although it is possible that additional cellular targets are also affected. Remarkably, the growth-inhibitory effect was observed even in osimertinib-resistant cells, indicating that BMVC-8C3O holds promise for treating drug-resistant NSCLC. Our findings present a promising and innovative approach for inhibiting the growth of NSCLC cells with EGFR mutations by effectively suppressing EGFR expression. The demonstrated efficacy of G-quadruplex ligands in this study highlights their potential as candidates for further development in NSCLC therapy.
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Affiliation(s)
- Kai Lu
- Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hsin-Chiao Wang
- Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yi-Chen Tu
- Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Pei-Jen Lou
- Department of Otolaryngology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 110, Taiwan
| | - Ta-Chau Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei, 106, Taiwan.
| | - Jing-Jer Lin
- Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan.
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Dai Y, Teng X, Zhang Q, Hou H, Li J. Advances and challenges in identifying and characterizing G-quadruplex-protein interactions. Trends Biochem Sci 2023; 48:894-909. [PMID: 37422364 DOI: 10.1016/j.tibs.2023.06.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 06/01/2023] [Accepted: 06/16/2023] [Indexed: 07/10/2023]
Abstract
G-quadruplexes (G4s) are peculiar nucleic acid secondary structures formed by DNA or RNA and are considered as fundamental features of the genome. Many proteins can specifically bind to G4 structures. There is increasing evidence that G4-protein interactions involve in the regulation of important cellular processes, such as DNA replication, transcription, RNA splicing, and translation. Additionally, G4-protein interactions have been demonstrated to be potential targets for disease treatment. In order to unravel the detailed regulatory mechanisms of G4-binding proteins (G4BPs), biochemical methods for detecting G4-protein interactions with high specificity and sensitivity are highly demanded. Here, we review recent advances in screening and validation of new G4BPs and highlight both their features and limitations.
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Affiliation(s)
- Yicong Dai
- Department of Chemistry, Center for BioAnalytical Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China; New Cornerstone Science Laboratory, Shenzhen 518054, China
| | - Xucong Teng
- Department of Chemistry, Center for BioAnalytical Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China; New Cornerstone Science Laboratory, Shenzhen 518054, China
| | - Qiushuang Zhang
- Department of Chemistry, Center for BioAnalytical Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China; New Cornerstone Science Laboratory, Shenzhen 518054, China
| | - Hongwei Hou
- Beijing Life Science Academy, Beijing 102209, China.
| | - Jinghong Li
- Department of Chemistry, Center for BioAnalytical Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China; New Cornerstone Science Laboratory, Shenzhen 518054, China; Beijing Life Science Academy, Beijing 102209, China; Center for BioAnalytical Chemistry, Hefei National Laboratory of Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, Anhui, China.
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Princiotto S, Karelou M, Ioannidi R, Beretta GL, Zaffaroni N, Artali R, Kostakis IK, Mazzini S, Dallavalle S. Exploring the Interaction of New Pyridoquinazoline Derivatives with G-Quadruplex in the c-MYC Promoter Region. Int J Mol Sci 2023; 24:14346. [PMID: 37762650 PMCID: PMC10531603 DOI: 10.3390/ijms241814346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023] Open
Abstract
Novel amino-substituted pyridoquinazolinone derivatives have been designed and synthesized as potential c-MYC G-quadruplex (G4) ligands, employing an efficient methodology. All the new compounds exhibited moderate to good antiproliferative activity against the human osteosarcoma U2OS cell line. NMR and docking experiments revealed that the recently synthesized compounds interact with the Pu22 G-quadruplex in the c-MYC promoter region, establishing a 2:1 complex, with each molecule positioned over the tetrads at the 3'- and 5'-ends.
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Affiliation(s)
- Salvatore Princiotto
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy; (S.P.); (S.D.)
| | - Maria Karelou
- Department of Pharmacy, Division of Pharmaceutical Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15771 Athens, Greece; (M.K.); (R.I.)
| | - Rachel Ioannidi
- Department of Pharmacy, Division of Pharmaceutical Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15771 Athens, Greece; (M.K.); (R.I.)
| | - Giovanni Luca Beretta
- Molecular Pharmacology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Via Amadeo 42, 20133 Milan, Italy; (G.L.B.); (N.Z.)
| | - Nadia Zaffaroni
- Molecular Pharmacology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Via Amadeo 42, 20133 Milan, Italy; (G.L.B.); (N.Z.)
| | | | - Ioannis K. Kostakis
- Department of Pharmacy, Division of Pharmaceutical Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15771 Athens, Greece; (M.K.); (R.I.)
| | - Stefania Mazzini
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy; (S.P.); (S.D.)
| | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy; (S.P.); (S.D.)
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Yuan J, He X, Wang Y. G-quadruplex DNA contributes to RNA polymerase II-mediated 3D chromatin architecture. Nucleic Acids Res 2023; 51:8434-8446. [PMID: 37427784 PMCID: PMC10484665 DOI: 10.1093/nar/gkad588] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 06/22/2023] [Accepted: 06/28/2023] [Indexed: 07/11/2023] Open
Abstract
High-order chromatin organization plays an important role in biological processes and disease development. Previous studies revealed a widespread occurrence of guanine quadruplex (G4) structures in the human genome, with enrichment in gene regulatory regions, especially in promoters. However, it remains unclear whether G4 structures contribute to RNA polymerase II (RNAPII)-mediated long-range DNA interactions and transcription activity. In this study, we conducted an intuitive overlapping analysis of previously published RNAPII ChIA-PET (chromatin interaction analysis with paired-end tag) and BG4 ChIP-seq (chromatin immunoprecipitation followed by sequencing using a G4 structure-specific antibody) data. We observed a strong positive correlation between RNAPII-linked DNA loops and G4 structures in chromatin. Additionally, our RNAPII HiChIP-seq (in situ Hi-C followed by ChIP-seq) results showed that treatment of HepG2 cells with pyridostatin (PDS), a small-molecule G4-binding ligand, could diminish RNAPII-linked long-range DNA contacts, with more pronounced diminutions being observed for those contacts involving G4 structure loci. RNA sequencing data revealed that PDS treatment modulates the expression of not only genes with G4 structures in their promoters, but also those with promoters being connected with distal G4s through RNAPII-linked long-range DNA interactions. Together, our data substantiate the function of DNA G4s in RNAPII-associated DNA looping and transcription regulation.
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Affiliation(s)
- Jun Yuan
- Environmental Toxicology Graduate Program, University of California, Riverside, Riverside, CA 92521-0403, USA
| | - Xiaomei He
- Department of Chemistry, University of California, Riverside, Riverside, CA 92521-0403, USA
| | - Yinsheng Wang
- Environmental Toxicology Graduate Program, University of California, Riverside, Riverside, CA 92521-0403, USA
- Department of Chemistry, University of California, Riverside, Riverside, CA 92521-0403, USA
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Zanin I, Ruggiero E, Nicoletto G, Lago S, Maurizio I, Gallina I, Richter SN. Genome-wide mapping of i-motifs reveals their association with transcription regulation in live human cells. Nucleic Acids Res 2023; 51:8309-8321. [PMID: 37528048 PMCID: PMC10484731 DOI: 10.1093/nar/gkad626] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 07/07/2023] [Accepted: 07/23/2023] [Indexed: 08/03/2023] Open
Abstract
i-Motifs (iMs) are four-stranded DNA structures that form at cytosine (C)-rich sequences in acidic conditions in vitro. Their formation in cells is still under debate. We performed CUT&Tag sequencing using the anti-iM antibody iMab and showed that iMs form within the human genome in live cells. We mapped iMs in two human cell lines and recovered C-rich sequences that were confirmed to fold into iMs in vitro. We found that iMs in cells are mainly present at actively transcribing gene promoters, in open chromatin regions, they overlap with R-loops, and their abundance and distribution are specific to each cell type. iMs with both long and short C-tracts were recovered, further extending the relevance of iMs. By simultaneously mapping G-quadruplexes (G4s), which form at guanine-rich regions, and comparing the results with iMs, we proved that the two structures can form in independent regions; however, when both iMs and G4s are present in the same genomic tract, their formation is enhanced. iMs and G4s were mainly found at genes with low and high transcription rates, respectively. Our findings support the in vivo formation of iM structures and provide new insights into their interplay with G4s as new regulatory elements in the human genome.
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Affiliation(s)
- Irene Zanin
- Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
| | - Emanuela Ruggiero
- Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
| | - Giulia Nicoletto
- Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
| | - Sara Lago
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, 38123 Trento, Italy
| | - Ilaria Maurizio
- Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
| | - Irene Gallina
- Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
| | - Sara N Richter
- Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
- Microbiology and Virology Unit, Padua University Hospital, 35121 Padua, Italy
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Wulfridge P, Yan Q, Rell N, Doherty J, Jacobson S, Offley S, Deliard S, Feng K, Phillips-Cremins JE, Gardini A, Sarma K. G-quadruplexes associated with R-loops promote CTCF binding. Mol Cell 2023; 83:3064-3079.e5. [PMID: 37552993 PMCID: PMC10529333 DOI: 10.1016/j.molcel.2023.07.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 03/24/2023] [Accepted: 07/07/2023] [Indexed: 08/10/2023]
Abstract
CTCF is a critical regulator of genome architecture and gene expression that binds thousands of sites on chromatin. CTCF genomic localization is controlled by the recognition of a DNA sequence motif and regulated by DNA modifications. However, CTCF does not bind to all its potential sites in all cell types, raising the question of whether the underlying chromatin structure can regulate CTCF occupancy. Here, we report that R-loops facilitate CTCF binding through the formation of associated G-quadruplex (G4) structures. R-loops and G4s co-localize with CTCF at many genomic regions in mouse embryonic stem cells and promote CTCF binding to its cognate DNA motif in vitro. R-loop attenuation reduces CTCF binding in vivo. Deletion of a specific G4-forming motif in a gene reduces CTCF binding and alters gene expression. Conversely, chemical stabilization of G4s results in CTCF gains and accompanying alterations in chromatin organization, suggesting a pivotal role for G4 structures in reinforcing long-range genome interactions through CTCF.
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Affiliation(s)
- Phillip Wulfridge
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Qingqing Yan
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nathaniel Rell
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - John Doherty
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Skye Jacobson
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sarah Offley
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Department of Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sandra Deliard
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Kelly Feng
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jennifer E Phillips-Cremins
- Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Alessandro Gardini
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Kavitha Sarma
- Gene expression and Regulation program, The Wistar Institute, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.
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Ali JH, Walter M. Combining old and new concepts in targeting telomerase for cancer therapy: transient, immediate, complete and combinatory attack (TICCA). Cancer Cell Int 2023; 23:197. [PMID: 37679807 PMCID: PMC10483736 DOI: 10.1186/s12935-023-03041-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 08/25/2023] [Indexed: 09/09/2023] Open
Abstract
Telomerase can overcome replicative senescence by elongation of telomeres but is also a specific element in most cancer cells. It is expressed more vastly than any other tumor marker. Telomerase as a tumor target inducing replicative immortality can be overcome by only one other mechanism: alternative lengthening of telomeres (ALT). This limits the probability to develop resistance to treatments. Moreover, telomerase inhibition offers some degree of specificity with a low risk of toxicity in normal cells. Nevertheless, only one telomerase antagonist reached late preclinical studies. The underlying causes, the pitfalls of telomerase-based therapies, and future chances based on recent technical advancements are summarized in this review. Based on new findings and approaches, we propose a concept how long-term survival in telomerase-based cancer therapies can be significantly improved: the TICCA (Transient Immediate Complete and Combinatory Attack) strategy.
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Affiliation(s)
- Jaber Haj Ali
- Institute of Laboratory Medicine, Clinical Chemistry and Pathobiochemistry, Charité Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
- Institute of Clinical Chemistry and Laboratory Medicine, Universitätsmedizin Rostock, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany
| | - Michael Walter
- Institute of Clinical Chemistry and Laboratory Medicine, Universitätsmedizin Rostock, Ernst-Heydemann-Straße 6, 18057, Rostock, Germany.
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42
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Porubiaková O, Havlík J, Indu, Šedý M, Přepechalová V, Bartas M, Bidula S, Šťastný J, Fojta M, Brázda V. Variability of Inverted Repeats in All Available Genomes of Bacteria. Microbiol Spectr 2023; 11:e0164823. [PMID: 37358458 PMCID: PMC10434271 DOI: 10.1128/spectrum.01648-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/03/2023] [Indexed: 06/27/2023] Open
Abstract
Noncanonical secondary structures in nucleic acids have been studied intensively in recent years. Important biological roles of cruciform structures formed by inverted repeats (IRs) have been demonstrated in diverse organisms, including humans. Using Palindrome analyser, we analyzed IRs in all accessible bacterial genome sequences to determine their frequencies, lengths, and localizations. IR sequences were identified in all species, but their frequencies differed significantly across various evolutionary groups. We detected 242,373,717 IRs in all 1,565 bacterial genomes. The highest mean IR frequency was detected in the Tenericutes (61.89 IRs/kbp) and the lowest mean frequency was found in the Alphaproteobacteria (27.08 IRs/kbp). IRs were abundant near genes and around regulatory, tRNA, transfer-messenger RNA (tmRNA), and rRNA regions, pointing to the importance of IRs in such basic cellular processes as genome maintenance, DNA replication, and transcription. Moreover, we found that organisms with high IR frequencies were more likely to be endosymbiotic, antibiotic producing, or pathogenic. On the other hand, those with low IR frequencies were far more likely to be thermophilic. This first comprehensive analysis of IRs in all available bacterial genomes demonstrates their genomic ubiquity, nonrandom distribution, and enrichment in genomic regulatory regions. IMPORTANCE Our manuscript reports for the first time a complete analysis of inverted repeats in all fully sequenced bacterial genomes. Thanks to the availability of unique computational resources, we were able to statistically evaluate the presence and localization of these important regulatory sequences in bacterial genomes. This work revealed a strong abundance of these sequences in regulatory regions and provides researchers with a valuable tool for their manipulation.
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Affiliation(s)
- Otília Porubiaková
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
| | - Jan Havlík
- Mendel University in Brno, Brno, Czech Republic
| | - Indu
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Michal Šedý
- Brno University of Technology, Faculty of Chemistry, Brno, Czech Republic
| | - Veronika Přepechalová
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
- Brno University of Technology, Faculty of Chemistry, Brno, Czech Republic
| | - Martin Bartas
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Ostrava, Czech Republic
| | - Stefan Bidula
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, United Kingdom
| | - Jiří Šťastný
- Mendel University in Brno, Brno, Czech Republic
- Brno University of Technology, Faculty of Mechanical Engineering, Brno, Czech Republic
| | - Miroslav Fojta
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
| | - Václav Brázda
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
- Brno University of Technology, Faculty of Chemistry, Brno, Czech Republic
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Liu Y, Li J, Zhang Y, Wang Y, Chen J, Bian Y, Xia Y, Yang MH, Zheng K, Wang KB, Kong LY. Structure of the Major G-Quadruplex in the Human EGFR Oncogene Promoter Adopts a Unique Folding Topology with a Distinctive Snap-Back Loop. J Am Chem Soc 2023; 145:16228-16237. [PMID: 37460135 DOI: 10.1021/jacs.3c05214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
EGFR tyrosine kinase inhibitors have made remarkable success in targeted cancer therapy. However, therapeutic resistance inevitably occurred and EGFR-targeting therapy has been demonstrated to have limited efficacy or utility in glioblastoma, colorectal cancer, and hepatocellular carcinoma. Therefore, there is a high demand for the development of new targets to inhibit EGFR signaling. Herein, we found that the EGFR oncogene proximal promoter sequence forms a unique type of snap-back loop containing G-quadruplex (G4), which can be targeted by small molecules. For the first time, we determined the NMR solution structure of this snap-back EGFR-G4, a three-tetrad-core, parallel-stranded G4 with naturally occurring flanking residues at both the 5'-end and 3'-end. The snap-back loop located at the 3'-end region forms a stable capping structure through two stacked G-triads connected by multiple potential hydrogen bonds. Notably, the flanking residues are consistently absent in reported snap-back G4s, raising the question of whether such structures truly exist under in vivo conditions. The resolved EGFR-G4 structure has eliminated the doubt and showed distinct structural features that distinguish it from the previously reported snap-back G4s, which lack the flanking residues. Furthermore, we found that the snap-back EGFR-G4 structure is highly stable and can form on an elongated DNA template to inhibit DNA polymerase. The unprecedented high-resolution EGFR-G4 structure has thus contributed a promising molecular target for developing alternative EGFR signaling inhibitors in cancer therapeutics. Meanwhile, the two stacked triads may provide an attractive site for specific small-molecule targeting.
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Affiliation(s)
- Yushuang Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Jinzhu Li
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Yongqiang Zhang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Yingying Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Juannan Chen
- School of Biomedical Sciences, Hunan University, Changsha, Hunan 410082, People's Republic of China
| | - Yuting Bian
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Yuanzheng Xia
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Ming-Hua Yang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Kewei Zheng
- School of Biomedical Sciences, Hunan University, Changsha, Hunan 410082, People's Republic of China
| | - Kai-Bo Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 210009, People's Republic of China
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Han ZQ, Wen LN. Application of G-quadruplex targets in gastrointestinal cancers: Advancements, challenges and prospects. World J Gastrointest Oncol 2023; 15:1149-1173. [PMID: 37546556 PMCID: PMC10401460 DOI: 10.4251/wjgo.v15.i7.1149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/11/2023] [Accepted: 05/08/2023] [Indexed: 07/12/2023] Open
Abstract
Genomic instability and inflammation are considered to be two enabling characteristics that support cancer development and progression. G-quadruplex structure is a key element that contributes to genomic instability and inflammation. G-quadruplexes were once regarded as simply an obstacle that can block the transcription of oncogenes. A ligand targeting G-quadruplexes was found to have anticancer activity, making G-quadruplexes potential anticancer targets. However, further investigation has revealed that G-quadruplexes are widely distributed throughout the human genome and have many functions, such as regulating DNA replication, DNA repair, transcription, translation, epigenetics, and inflammatory response. G-quadruplexes play double regulatory roles in transcription and translation. In this review, we focus on G-quadruplexes as novel targets for the treatment of gastrointestinal cancers. We summarize the application basis of G-quadruplexes in gastrointestinal cancers, including their distribution sites, structural characteristics, and physiological functions. We describe the current status of applications for the treatment of esophageal cancer, pancreatic cancer, hepatocellular carcinoma, gastric cancer, colorectal cancer, and gastrointestinal stromal tumors, as well as the associated challenges. Finally, we review the prospective clinical applications of G-quadruplex targets, providing references for targeted treatment strategies in gastrointestinal cancers.
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Affiliation(s)
- Zong-Qiang Han
- Department of Laboratory Medicine, Beijing Xiaotangshan Hospital, Beijing 102211, China
| | - Li-Na Wen
- Department of Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
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Swarup N, Cheng J, Choi I, Heo YJ, Kordi M, Li F, Aziz M, Chia D, Wei F, Elashoff D, Zhang L, Kim S, Kim Y, Wong DT. Multi-Faceted Attributes of Salivary Cell-free DNA as Liquid Biopsy Biomarkers for Gastric Cancer Detection. RESEARCH SQUARE 2023:rs.3.rs-3154388. [PMID: 37503289 PMCID: PMC10371094 DOI: 10.21203/rs.3.rs-3154388/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Background Recent advances in circulating cell-free DNA (cfDNA) analysis from biofluids have opened new avenues for liquid biopsy (LB). However, current cfDNA LB assays are limited by the availability of existing information on established genotypes associated with tumor tissues. Certain cancers present with a limited list of established mutated cfDNA biomarkers, and thus, nonmutated cfDNA characteristics along with alternative biofluids are needed to broaden the available cfDNA targets for cancer detection. Saliva is an intriguing and accessible biofluid that has yet to be fully explored for its clinical utility for cancer detection. Methods In this report, we employed a low-coverage single stranded (ss) library NGS pipeline "Broad-Range cell-free DNA-Seq" (BRcfDNA-Seq) using saliva to comprehensively investigate the characteristics of salivary cfDNA (ScfDNA). The identification of cfDNA features has been made possible by applying novel cfDNA processing techniques that permit the incorporation of ultrashort, ss, and jagged DNA fragments. As a proof of concept using 10 gastric cancer (GC) and 10 noncancer samples, we examined whether ScfDNA characteristics, including fragmentomics, end motif profiles, microbial contribution, and human chromosomal mapping, could differentiate between these two groups. Results Individual and integrative analysis of these ScfDNA features demonstrated significant differences between the two cohorts, suggesting that disease state may affect the ScfDNA population by altering nuclear cleavage or the profile of contributory organism cfDNA to total ScfDNA. We report that principal component analysis integration of several aspects of salivary cell-free DNA fragmentomic profiles, genomic element profiles, end-motif sequence patterns, and distinct oral microbiome populations can differentiate the two populations with a p value of < 0.0001 (PC1). Conclusion These novel features of ScfDNA characteristics could be clinically useful for improving saliva-based LB detection and the eventual monitoring of local or systemic diseases.
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Affiliation(s)
- Neeti Swarup
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jordan Cheng
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Irene Choi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - You Jeong Heo
- The Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06355, Republic of Korea
| | - Misagh Kordi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Feng Li
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Mohammad Aziz
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David Chia
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Fang Wei
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David Elashoff
- Department of Medicine, Biostatistics and Computational Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Liying Zhang
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Sung Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06355, South Korea
| | - Yong Kim
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David T.W. Wong
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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Ketkar A, Sewilam RS, McCrury MJ, Hall JS, Bell A, Paxton BC, Tripathi S, Gunderson JEC, Eoff RL. Conservation of the insert-2 motif confers Rev1 from different species with an ability to disrupt G-quadruplexes and stimulate translesion DNA synthesis. RSC Chem Biol 2023; 4:466-485. [PMID: 37415867 PMCID: PMC10320842 DOI: 10.1039/d3cb00027c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 05/08/2023] [Indexed: 07/08/2023] Open
Abstract
In some organisms, the replication of G-quadruplex (G4) structures is supported by the Rev1 DNA polymerase. We previously showed that residues in the insert-2 motif of human Rev1 (hRev1) increased the affinity of the enzyme for G4 DNA and mediated suppression of mutagenic replication near G4 motifs. We have now investigated the conservation of G4-selective properties in Rev1 from other species. We compared Rev1 from Danio rerio (zRev1), Saccharomyces cerevisiae (yRev1), and Leishmania donovani (lRev1) with hRev1, including an insert-2 mutant form of hRev1 (E466A/Y470A or EY). We found that zRev1 retained all of the G4-selective prowess of the human enzyme, but there was a marked attenuation of G4 binding affinity for the EY hRev1 mutant and the two Rev1 proteins lacking insert-2 (yRev1 and lRev1). Perhaps most strikingly, we found that insert-2 was important for disruption of the G4 structure and optimal stimulation of processive DNA synthesis across the guanine-rich motif by DNA polymerase kappa (pol κ). Our findings have implications for how Rev1 might contribute to G4 replication in different species spanning the evolutionary tree - signaling the importance of selection for enzymes with robust G4-selective properties in organisms where these non-B DNA structures may fulfill taxa-specific physiological functions.
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Affiliation(s)
- Amit Ketkar
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
| | - Reham S Sewilam
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
| | - Mason J McCrury
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
| | - Jaycelyn S Hall
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
| | - Ashtyn Bell
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
| | - Bethany C Paxton
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
| | - Shreyam Tripathi
- Arkansas School for Mathematics, Sciences, and the Arts Hot Springs AR 71901 USA
| | | | - Robert L Eoff
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences Little Rock AR 72205 USA +1 501 686 8169 +1 501 686 8343
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Hernández‐Carralero E, Cabrera E, Rodríguez-Torres G, Hernández-Reyes Y, Singh A, Santa-María C, Fernández-Justel J, Janssens R, Marteijn J, Evert B, Mailand N, Gómez M, Ramadan K, Smits VJ, Freire R. ATXN3 controls DNA replication and transcription by regulating chromatin structure. Nucleic Acids Res 2023; 51:5396-5413. [PMID: 36971114 PMCID: PMC10287915 DOI: 10.1093/nar/gkad212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 02/10/2023] [Accepted: 03/14/2023] [Indexed: 11/18/2023] Open
Abstract
The deubiquitinating enzyme Ataxin-3 (ATXN3) contains a polyglutamine (PolyQ) region, the expansion of which causes spinocerebellar ataxia type-3 (SCA3). ATXN3 has multiple functions, such as regulating transcription or controlling genomic stability after DNA damage. Here we report the role of ATXN3 in chromatin organization during unperturbed conditions, in a catalytic-independent manner. The lack of ATXN3 leads to abnormalities in nuclear and nucleolar morphology, alters DNA replication timing and increases transcription. Additionally, indicators of more open chromatin, such as increased mobility of histone H1, changes in epigenetic marks and higher sensitivity to micrococcal nuclease digestion were detected in the absence of ATXN3. Interestingly, the effects observed in cells lacking ATXN3 are epistatic to the inhibition or lack of the histone deacetylase 3 (HDAC3), an interaction partner of ATXN3. The absence of ATXN3 decreases the recruitment of endogenous HDAC3 to the chromatin, as well as the HDAC3 nuclear/cytoplasm ratio after HDAC3 overexpression, suggesting that ATXN3 controls the subcellular localization of HDAC3. Importantly, the overexpression of a PolyQ-expanded version of ATXN3 behaves as a null mutant, altering DNA replication parameters, epigenetic marks and the subcellular distribution of HDAC3, giving new insights into the molecular basis of the disease.
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Affiliation(s)
- Esperanza Hernández‐Carralero
- Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain
- Escuela de Doctorado y Estudios de Posgrado, Universidad de la Laguna, Santa Cruz de Tenerife, Spain
- Instituto de Tecnologías Biomédicas, Centro de Investigaciones Biomédicas de Canarias, Facultad de Medicina, Campus Ciencias de la Salud, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
| | - Elisa Cabrera
- Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain
| | - Gara Rodríguez-Torres
- Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain
- Escuela de Doctorado y Estudios de Posgrado, Universidad de la Laguna, Santa Cruz de Tenerife, Spain
- Instituto de Tecnologías Biomédicas, Centro de Investigaciones Biomédicas de Canarias, Facultad de Medicina, Campus Ciencias de la Salud, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
| | - Yeray Hernández-Reyes
- Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain
- Escuela de Doctorado y Estudios de Posgrado, Universidad de la Laguna, Santa Cruz de Tenerife, Spain
- Instituto de Tecnologías Biomédicas, Centro de Investigaciones Biomédicas de Canarias, Facultad de Medicina, Campus Ciencias de la Salud, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
| | - Abhay N Singh
- MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Cristina Santa-María
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas/Universidad Autónoma de Madrid (CSIC/UAM), Madrid, Spain
| | - José Miguel Fernández-Justel
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas/Universidad Autónoma de Madrid (CSIC/UAM), Madrid, Spain
| | - Roel C Janssens
- Department of Molecular Genetics, Oncode Institute, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Jurgen A Marteijn
- Department of Molecular Genetics, Oncode Institute, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Bernd O Evert
- Department of Neurology, University Hospital Bonn, Bonn, Germany
| | - Niels Mailand
- Protein Signaling Program, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark
- Center for Chromosome Stability, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - María Gómez
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas/Universidad Autónoma de Madrid (CSIC/UAM), Madrid, Spain
| | - Kristijan Ramadan
- MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Veronique A J Smits
- Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain
- Instituto de Tecnologías Biomédicas, Centro de Investigaciones Biomédicas de Canarias, Facultad de Medicina, Campus Ciencias de la Salud, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
- Universidad Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
| | - Raimundo Freire
- Unidad de Investigación, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain
- Instituto de Tecnologías Biomédicas, Centro de Investigaciones Biomédicas de Canarias, Facultad de Medicina, Campus Ciencias de la Salud, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
- Universidad Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
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48
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Xiao CD, Jia MH, Zhong MQ, Xu Y, Yu ZT, He ZY, Lu X, Zhang Y, Zhou X, Fu LY, Shen XC. Unveiling the role of G-quadruplex structure in promoter region: Regulation of ABCA1 expression in macrophages possibly via NONO protein recruitment. Int J Biol Macromol 2023:125443. [PMID: 37353131 DOI: 10.1016/j.ijbiomac.2023.125443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/25/2023]
Abstract
ABCA1 has been found to be critical for cholesterol efflux in macrophages. Understanding the mechanism regulating ABCA1 expression is important for the prevention and treatment of atherosclerosis. In the present study, a G-quadruplex (G4) structure was identified in the ABCA1 promoter region. This G4 was shown to be essential for ABCA1 transcription. Stabilizing the G4 by ligands surprisingly upregulated ABCA1 expression in macrophages. Knocking out the G4 remarkably reduced ABCA1 expression, and abolished the increase of ABCA1 expression induced by the G4 ligand. By pull-down assays, the protein NONO was identified as an ABCA1 G4 binder. Overexpression or repression of NONO significantly induced upregulation and downregulation of ABCA1 expression, respectively. ChIP and EMSA experiments showed that the G4 ligand promoted the binding between the ABCA1 G4 and NONO, which led to more recruitment of NONO to the promoter region and enhanced ABCA1 transcription. Finally, the G4 ligand was shown to significantly reduce the accumulation of cholesterol in macrophages. This study showed a new insight into the regulation of gene expression by G4, and provided a new molecular mechanism regulating ABCA1 expression in macrophages. Furthermore, the study showed a possible novel application of the G4 ligand: preventing and treating atherosclerosis.
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Affiliation(s)
- Chao-Da Xiao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China; The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China.
| | - Meng-Hao Jia
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China.
| | - Ming-Qing Zhong
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China
| | - Yan Xu
- Division of Chemistry, Department of Medical Sciences, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Zu-Tao Yu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK
| | - Zhi-Yong He
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China
| | - Xu Lu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China
| | - Yan Zhang
- Department of Radiology, Affiliated Hospital of Guizhou Medical University, Guiyang 550001, China
| | - Xue Zhou
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China
| | - Lin-Yun Fu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China
| | - Xiang-Chun Shen
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China; The Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, University Town, Guian New District, Guiyang 550025, China.
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49
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Mu ZC, Tan YL, Liu J, Zhang BG, Shi YZ. Computational Modeling of DNA 3D Structures: From Dynamics and Mechanics to Folding. Molecules 2023; 28:4833. [PMID: 37375388 DOI: 10.3390/molecules28124833] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/11/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
DNA carries the genetic information required for the synthesis of RNA and proteins and plays an important role in many processes of biological development. Understanding the three-dimensional (3D) structures and dynamics of DNA is crucial for understanding their biological functions and guiding the development of novel materials. In this review, we discuss the recent advancements in computer methods for studying DNA 3D structures. This includes molecular dynamics simulations to analyze DNA dynamics, flexibility, and ion binding. We also explore various coarse-grained models used for DNA structure prediction or folding, along with fragment assembly methods for constructing DNA 3D structures. Furthermore, we also discuss the advantages and disadvantages of these methods and highlight their differences.
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Affiliation(s)
- Zi-Chun Mu
- Research Center of Nonlinear Science, School of Mathematical & Physical Sciences, Wuhan Textile University, Wuhan 430073, China
- School of Computer Science and Artificial Intelligence, Wuhan Textile University, Wuhan 430073, China
| | - Ya-Lan Tan
- Research Center of Nonlinear Science, School of Mathematical & Physical Sciences, Wuhan Textile University, Wuhan 430073, China
| | - Jie Liu
- Research Center of Nonlinear Science, School of Mathematical & Physical Sciences, Wuhan Textile University, Wuhan 430073, China
| | - Ben-Gong Zhang
- Research Center of Nonlinear Science, School of Mathematical & Physical Sciences, Wuhan Textile University, Wuhan 430073, China
| | - Ya-Zhou Shi
- Research Center of Nonlinear Science, School of Mathematical & Physical Sciences, Wuhan Textile University, Wuhan 430073, China
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50
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D'Amico F, Graziano R, D'Aria F, Russomanno P, Di Fonzo S, Amato J, Pagano B. Cytosine epigenetic modifications and conformational changes in G-quadruplex DNA: An ultraviolet resonance Raman spectroscopy study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 300:122901. [PMID: 37244027 DOI: 10.1016/j.saa.2023.122901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/26/2023] [Accepted: 05/17/2023] [Indexed: 05/29/2023]
Abstract
Epigenetic modifications of DNA are known to play important regulatory roles in biological systems, especially in regulation of gene expression, and are associated with many types of human diseases, including cancer. Alternative DNA secondary structures, such as G-quadruplexes, can also influence gene transcription, thus suggesting that such structures may represent a distinctive layer of epigenetic information. G-quadruplex structures and DNA epigenetic modifications often go side by side, and recent evidence reveals that cytosine modifications within loops of G-quadruplexes can play a role in modulating their stability and structural polymorphism. Therefore, the development and validation of experimental techniques that can easily and reliably analyse G-quadruplex structures are highly desirable. In the present study, we propose to exploit the advantages of UV resonance Raman (UVRR) spectroscopy to investigate cytosine epigenetic modifications along with conformational changes in G-quadruplex-forming DNA. Our findings show that clear and specific spectral changes occur when there is a change in a G-quadruplex structure. Moreover, UVRR spectral analysis can indirectly distinguish the spectral variations occurring because of modifications in the guanine glycosidic conformations, as well as detect changes in the loops induced by H-bond formation or hydration of nitrogenous bases. The results further underscore the utility of UVRR spectroscopy for G-quadruplex structure elucidation under biologically relevant solution conditions.
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Affiliation(s)
- Francesco D'Amico
- Elettra-Sincrotrone Trieste S. C. p. A., Science Park, Trieste I-34149, Italy
| | - Raffaele Graziano
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Federica D'Aria
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Pasquale Russomanno
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Silvia Di Fonzo
- Elettra-Sincrotrone Trieste S. C. p. A., Science Park, Trieste I-34149, Italy
| | - Jussara Amato
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy.
| | - Bruno Pagano
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Naples, Italy.
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