1
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Kolganova NA, Tsvetkov VB, Stomakhin AA, Surzhikov SA, Timofeev EN, Varizhuk IV. Alpha-Deoxyguanosine to Reshape the Alpha-Thrombin Binding Aptamer. Int J Mol Sci 2023; 24:ijms24098406. [PMID: 37176113 PMCID: PMC10179326 DOI: 10.3390/ijms24098406] [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: 03/27/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Modification of DNA aptamers is aimed at increasing their thermodynamic stability, and improving affinity and resistance to biodegradation. G-quadruplex DNA aptamers are a family of affinity ligands that form non-canonical DNA assemblies based on a G-tetrads stack. Modification of the quadruplex core is challenging since it can cause complete loss of affinity of the aptamer. On the other hand, increased thermodynamic stability could be a worthy reward. In the current paper, we developed new three- and four-layer modified analogues of the thrombin binding aptamer with high thermal stability, which retain anticoagulant activity against alpha-thrombin. In the modified aptamers, one or two G-tetrads contained non-natural anti-preferred alpha-deoxyguanosines at specific positions. The use of this nucleotide analogue made it possible to control the topology of the modified structures. Due to the presence of non-natural tetrads, we observed some decrease in the anticoagulant activity of the modified aptamers compared to the natural prototype. This negative effect was completely compensated by conjugation of the aptamers with optimized tripeptide sequences.
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Affiliation(s)
- Natalia A Kolganova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Vladimir B Tsvetkov
- Federal Research and Clinical Center of Physical-Chemical Medicine, 119435 Moscow, Russia
- Institute of Biodesign and Complex System Modeling, Sechenov First Moscow State Medical University, 119146 Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Andrey A Stomakhin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Sergei A Surzhikov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Edward N Timofeev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Irina V Varizhuk
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
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2
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Gao C, Deng J, Anwar N, Umer M, Chen J, Wu Q, Dong X, Xu H, He Y, Wang Z. Molecular crowding promotes the aggregation of parallel structured G-quadruplexes. Int J Biol Macromol 2023; 240:124442. [PMID: 37062387 DOI: 10.1016/j.ijbiomac.2023.124442] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 04/09/2023] [Accepted: 04/10/2023] [Indexed: 04/18/2023]
Abstract
G-quadruplexes are widely distributed in cells and are usually essential in mediating biological processes. The intracellular environment is often in a state of molecular crowding, and the current research considerably focuses on the effect of molecular crowding on the conformation of telomeric G-quadruplexes. However, G-quadruplex-forming oligonucleotides are primarily located in the promoter region of the proto-oncogene and on mRNA inside the cell and are reported to fold into parallel structures. Thus, studying the interaction mechanism between ligands and parallel structured G-quadruplexes under crowding conditions is crucial for the design of drugs targeting G-quadruplexes. In our study, molecular crowding was simulated through polyethylene glycol with an average molecular weight of 200 (PEG200) to investigate the parallel structure of the canonical G-quadruplexes c-KIT1, c-MYC, and 32KRAS and their interactions with ligands. Circular dichroism (CD) spectral scanning, fluorescence resonance energy transfer (FRET), and native polyacrylamide gel electrophoresis (PAGE) analysis revealed that molecular crowding failed to induce oligonucleotides to form parallel G-quadruplex structures in the explored model sequences while induced telomeric G-rich sequences to form antiparallel G-quadruplexes in solution without K+. Molecular crowding did not induce changes in their parallel structures but promoted the formation of G-quadruplex aggregates. Moreover, to some extent, molecular crowding also induced a looser structure of the monomer G-quadruplexes. Further studies showed that molecular crowding did not alter the binding stoichiometry of the ligand 3,11-difluoro-6,8,13-trimethyl-8H-quino [4,3,2-kl] acridinium methosulfate (RHPS4) to c-KIT1, while it inhibited its interaction with parallel structured G-quadruplexes. This work provides new insights into developing anticancer drugs targeting parallel structured G-quadruplexes.
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Affiliation(s)
- Chao Gao
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Jieya Deng
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Naureen Anwar
- Department of Zoology, University of Narowal, Narowal, Punjab 51600, Pakistan
| | - Muhammad Umer
- Institute for Forest Resources and Environment of Guizhou and Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang 550025, China
| | - Jixin Chen
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Qiao Wu
- Wuhan Botanical Garden, Chinese Academy of Science, Wuhan 40074, China
| | - Xingxing Dong
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Hua Xu
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Yi He
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
| | - Zhangqian Wang
- National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China; State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China.
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3
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Xu Q, Yang M, Chang Y, Peng S, Wang D, Zhou X, Shao Y. Switching G-quadruplex to parallel duplex by molecular rotor clustering. Nucleic Acids Res 2022; 50:10249-10263. [PMID: 36130267 PMCID: PMC9561263 DOI: 10.1093/nar/gkac811] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 08/31/2022] [Accepted: 09/10/2022] [Indexed: 11/12/2022] Open
Abstract
Switching of G-quadruplex (G4) structures between variant types of folding has been proved to be a versatile tool for regulation of genomic expression and development of nucleic acid-based constructs. Various specific ligands have been developed to target G4s in K+ solution with therapeutic prospects. Although G4 structures have been reported to be converted by sequence modification or a unimolecular ligand binding event in K+-deficient conditions, switching G4s towards non-G4 folding continues to be a great challenge due to the stability of G4 in physiological K+ conditions. Herein, we first observed the G4 switching towards parallel-stranded duplex (psDNA) by multimolecular ligand binding (namely ligand clustering) to overcome the switching barrier in K+. Purine-rich sequences (e.g. those from the KRAS promoter region) can be converted from G4 structures to dimeric psDNAs using molecular rotors (e.g. thioflavin T and thiazole orange) as initiators. The formed psDNAs provided multiple binding sites for molecular rotor clustering to favor subsequent structures with stability higher than the corresponding G4 folding. Our finding provides a clue to designing ligands with the competency of molecular rotor clustering to implement an efficient G4 switching.
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Affiliation(s)
- Qiuda Xu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Mujing Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Yun Chang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Shuzhen Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Dandan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Xiaoshun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Yong Shao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
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4
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Zhang Q, Yang T, Zheng G, Gao H, Yan C, Zheng X, Zhou X, Shao Y. Characterization of intermolecular G-quadruplex formation over intramolecular G-triplex for DNA containing three G-tracts. Analyst 2021; 145:4254-4259. [PMID: 32478785 DOI: 10.1039/d0an00791a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
G-triplex (G3) has been recognized as a popular intermediate during the folding of G-quadruplex (G4). This has raised interest to anticipate the ultimate formation of G3 by shortening the G4-forming oligonucleotides with the remaining three G-tracts. Some G3 structures have been validated and their stability has been found to be affected by the loop sequences similar to G4s. In this work, however, we first found that an intermolecular parallel G4 structure was preferred in K+ for the oligonucleotide 5'-TGGGTAGGGCGGG-3' (DZ3) containing only three G-tracts. We screened auramine O (AO) as the appropriate fluorophore with a molecular rotor feature to target this G4 structure. AO bound with DZ3 in a 1 : 4 ratio, as confirmed by isothermal titration calorimetry experiments, suggesting the formation of a tetramolecular G4 structure (4erG4). The excimer emission from the labelled pyrene and the DNA melting behavior at various pHs in the presence of Ag+ proved the formation of the 4erG4 structure rather than the prevalent intramolecular G3 folding. This work demonstrates that one should be cautious while putatively predicting a G3 structure from an oligonucleotide containing three G-tracts.
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Affiliation(s)
- Qingqing Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Tong Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Guoxiang Zheng
- Undergraduate Teaching Department, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
| | - Heng Gao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Chenxiao Yan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Xiong Zheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Xiaoshun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Yong Shao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
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5
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Hao X, Wang C, Wang Y, Li C, Hou J, Zhang F, Kang C, Gao L. Topological conversion of human telomeric G-quadruplexes from hybrid to parallel form induced by naphthalene diimide ligands. Int J Biol Macromol 2020; 167:1048-1058. [PMID: 33188810 DOI: 10.1016/j.ijbiomac.2020.11.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/09/2020] [Accepted: 11/09/2020] [Indexed: 12/17/2022]
Abstract
G-quadruplexes (GQs) have become promising anti-cancer therapeutic targets, which are formed by the folding of a guanine-rich repeat DNA/RNA sequence at human telomeres or oncogene promoters. Polymorphism has been observed for the folding topologies of intramolecular GQs. Here we report the topological conversion of human telomeric GQ induced by naphthalene diimide (NDI) ligands in K+ solution. The ligands selectively induce metastable hybrid-type GQs to highly stable parallel-type GQ at physiological temperature (37 °C) in dilute aqueous solutions and under crowding conditions that mimic cellular bioenvironment. According to spectroscopic analyses, the topological conversion is speculated to undergo stepwise unfolding of hybrid-type GQ through intermediate states to parallel-type GQ. The results will prompt further studies on the designs of ligands with GQ conformation regulation functions and nanotechnological systems based on nucleic acids with dynamic regulation of GQ conformation.
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Affiliation(s)
- Xueyu Hao
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Science and Technology of China, Hefei 230026, China
| | - Chunyu Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Yu Wang
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Science and Technology of China, Hefei 230026, China
| | - Chunjie Li
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Jingwei Hou
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Feng Zhang
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Chuanqing Kang
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Science and Technology of China, Hefei 230026, China.
| | - Lianxun Gao
- Laboratory of Polymer Composite and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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6
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Smirnov IP, Kolganova NA, Surzhikov SA, Grechishnikova IV, Novikov RA, Timofeev EN. Folding topology, structural polymorphism, and dimerization of intramolecular DNA G-quadruplexes with inverted polarity strands and non-natural loops. Int J Biol Macromol 2020; 162:1972-1981. [PMID: 32800956 DOI: 10.1016/j.ijbiomac.2020.08.097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 01/27/2023]
Abstract
Synthetically modified DNA G-quadruplexes (GQs) have great potential in the development of designer molecules for a wide range of applications. Identification of the role of various structural elements in the folding and final topology of artificial GQs is necessary to predict their secondary structure. We report here the results of spectroscopic and electrophoretic studies of GQ scaffolds formed by G-rich sequences comprising four G3-tracts of different polarity connected by either a single-nucleotide thymine loop or a non-natural tetraethyleneglycol loop. Depending on G-strand polarities, loop arrangement and the presence of extra 5'-base G-rich oligonucleotides form monomeric, dimeric, or multimeric species of different topologies. In most cases, oligonucleotides were able to fold into stable parallel or hybrid GQs. However, certain specific arrangements of loops and G-tracts resulted in a diverse mixture of low stable structures. Comparative analysis of topology, stability, and structural heterogeneity of different G-rich sequences suggests the important role of loop type and arrangement, G3-tract polarities, and the presence of 5'-capping residues in the outcome of the folding process. The results also imply that the formation of anti-parallel G-hairpin intermediates is a key event in major favourable folding pathways.
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Affiliation(s)
- Igor P Smirnov
- Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow 119435, Russia
| | - Natalia A Kolganova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Sergei A Surzhikov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Irina V Grechishnikova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Roman A Novikov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia
| | - Edward N Timofeev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia.
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7
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Su Y, Edwards PJB, Stetsenko DA, Filichev VV. The Importance of Phosphates for DNA G-Quadruplex Formation: Evaluation of Zwitterionic G-Rich Oligodeoxynucleotides. Chembiochem 2020; 21:2455-2466. [PMID: 32281223 DOI: 10.1002/cbic.202000110] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/09/2020] [Indexed: 12/21/2022]
Abstract
A quaternary ammonium butylsulfonyl phosphoramidate group (N+) was designed to replace all the phosphates in a G-rich oligodeoxynucleotide d(TG4 T), resulting in a formally charge-neutral zwitterionic N+TG4 T sequence. We evaluated the effects of N+phosphate modifications on the structural, thermodynamic and kinetic properties of the parallel G-quadruplexes (G4) formed by TG4 T and compared them to the properties of the recently published phosphoryl guanidine d(TG4 T) (PG-TG4 T). Using size-exclusion chromatography, we established that, unlike PG-TG4 T, which exists as a mixture of complexes of different molecularity in solution, N+TG4 T forms an individual tetramolecular complex. In contrast to PG modifications that destabilized G4s, the presence of N+ modifications increased thermal stability relative to unmodified [d(TG4 T)]4 . The initial stage of assembly of N+TG4 T proceeded faster in the presence of Na+ than K+ ions and, similarly to PG-TG4 T, was independent of the salt concentration. However, after complex formation exceeded 75 %, N+TG4 T in solution with Na+ showed slower association than with K+ . N+TG4 T could also form G4s in solution with Li+ ions at a very low strand concentration (10 μM); something that has never been reported for the native d(TG4 T). Charge-neutral PG-G4s can invade preformed native G4s, whereas no invasion was observed between N+and native G4s, possibly due to the increased thermal stability of [N+TG4 T]4 . The N+ modification makes d(TG4 T) fully resistant to enzymatic digestion, which could be useful for intracellular application of N+-modified DNA or RNA.
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Affiliation(s)
- Yongdong Su
- School of Fundamental Sciences, Massey University, Private Bag 11-222, 4442, Palmerston North, New Zealand
| | - Patrick J B Edwards
- School of Fundamental Sciences, Massey University, Private Bag 11-222, 4442, Palmerston North, New Zealand
| | - Dmitry A Stetsenko
- Novosibirsk State University, 2 Pirogov Street, Novosibirsk, 630090, Russia.,Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 10 Lavrentiev Avenue, Novosibirsk, 630090, Russia
| | - Vyacheslav V Filichev
- School of Fundamental Sciences, Massey University, Private Bag 11-222, 4442, Palmerston North, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, 1142, New Zealand
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8
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Roach RJ, Garavís M, González C, Jameson GB, Filichev VV, Hale TK. Heterochromatin protein 1α interacts with parallel RNA and DNA G-quadruplexes. Nucleic Acids Res 2020; 48:682-693. [PMID: 31799602 PMCID: PMC6954420 DOI: 10.1093/nar/gkz1138] [Citation(s) in RCA: 207] [Impact Index Per Article: 51.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 11/19/2019] [Accepted: 11/25/2019] [Indexed: 02/06/2023] Open
Abstract
The eukaryotic genome is functionally organized into domains of transcriptionally active euchromatin and domains of highly compact transcriptionally silent heterochromatin. Heterochromatin is constitutively assembled at repetitive elements that include the telomeres and centromeres. The histone code model proposes that HP1α forms and maintains these domains of heterochromatin through the interaction of its chromodomain with trimethylated lysine 9 of histone 3, although this interaction is not the sole determinant. We show here that the unstructured hinge domain, necessary for the targeting of HP1α to constitutive heterochromatin, recognizes parallel G-quadruplex (G4) assemblies formed by the TElomeric Repeat-containing RNA (TERRA) transcribed from the telomere. This provides a mechanism by which TERRA can lead to the enrichment of HP1α at telomeres to maintain heterochromatin. Furthermore, we show that HP1α binds with a faster association rate to DNA G4s of parallel topology compared to antiparallel G4s that bind slowly or not at all. Such G4–DNAs are found in the regulatory regions of several oncogenes. This implicates specific non-canonical nucleic acid structures as determinants of HP1α function and thus RNA and DNA G4s need to be considered as contributors to chromatin domain organization and the epigenome.
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Affiliation(s)
- Ruby J Roach
- School of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
| | - Miguel Garavís
- Instituto de Química Física 'Rocasolano', CSIC, Serrano 119, 28006 Madrid, Spain
| | - Carlos González
- Instituto de Química Física 'Rocasolano', CSIC, Serrano 119, 28006 Madrid, Spain
| | - Geoffrey B Jameson
- School of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand.,Maurice Wilkins Centre, Private Bag 92019, Auckland, New Zealand
| | - Vyacheslav V Filichev
- School of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand.,Maurice Wilkins Centre, Private Bag 92019, Auckland, New Zealand
| | - Tracy K Hale
- School of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand.,Maurice Wilkins Centre, Private Bag 92019, Auckland, New Zealand
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9
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Ma Y, Iida K, Nagasawa K. Topologies of G-quadruplex: Biological functions and regulation by ligands. Biochem Biophys Res Commun 2020; 531:3-17. [PMID: 31948752 DOI: 10.1016/j.bbrc.2019.12.103] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 12/20/2019] [Accepted: 12/28/2019] [Indexed: 01/06/2023]
Abstract
G-Quadruplex (G4) is one of the higher-order structures occurring in guanine-rich sequences of nucleic acids, and plays critical roles in biological processes. The G4-forming sequences can generate three kinds of topologies, i.e., parallel, anti-parallel, and hybrid, and these polymorphic structures have an important influence on G4-related biological functions. In this review, we highlight variety of structures generated by G4s containing various sequences and under diverse conditions. We also discuss the G4 ligands which induce specific topologies and/or conversion between different topologies.
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Affiliation(s)
- Yue Ma
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Japan.
| | - Keisuke Iida
- Department of Chemistry, Chiba University, Japan
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Japan.
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