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Ruiz N, Jarosova P, Taborsky P, Gargallo R. Study of the interaction of the palmatine alkaloid with hybrid G-quadruplex/duplex and i-motif/duplex DNA structures. Biophys Chem 2021; 281:106715. [PMID: 34784553 DOI: 10.1016/j.bpc.2021.106715] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/22/2021] [Accepted: 11/04/2021] [Indexed: 11/19/2022]
Abstract
There is an increasing interest in the study of guanine or cytosine-rich sequences that may fold into G-quadruplex (G4) or i-motif (iM) structures showing a short hairpin (or stem-loop) stabilized by Watson-Crick base pairs. These hybrid spatial arrangements may be target of ligands that have been shown to interact strongly with B-DNA. In this work, the interaction of the palmatine alkaloid with several sequences forming different G4s, iMs, and hybrid structures has been studied by means of spectroscopic and separation techniques, as well as multivariate data analysis methods. At the experimental conditions used in this work, the results have shown that this ligand strongly stabilizes parallel G4 structures, whereas a weaker interaction was observed with the antiparallel G4 adopted by the thrombin-binding aptamer or iMs. The presence of hairpins within the loops scarcely affects the affinity of this ligand for the hybrid G4/duplex or iM/duplex structures. Fluorescence measurements have provided evidence of a certain interaction with iMs at pH 5.1, despite the absence of thermal stabilization effects.
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Affiliation(s)
- Noelia Ruiz
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí I Franqués 1-11, E-08028 Barcelona, Spain
| | - Petra Jarosova
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - Petr Taborsky
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic.
| | - Raimundo Gargallo
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí I Franqués 1-11, E-08028 Barcelona, Spain.
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Largy E, König A, Ghosh A, Ghosh D, Benabou S, Rosu F, Gabelica V. Mass Spectrometry of Nucleic Acid Noncovalent Complexes. Chem Rev 2021; 122:7720-7839. [PMID: 34587741 DOI: 10.1021/acs.chemrev.1c00386] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nucleic acids have been among the first targets for antitumor drugs and antibiotics. With the unveiling of new biological roles in regulation of gene expression, specific DNA and RNA structures have become very attractive targets, especially when the corresponding proteins are undruggable. Biophysical assays to assess target structure as well as ligand binding stoichiometry, affinity, specificity, and binding modes are part of the drug development process. Mass spectrometry offers unique advantages as a biophysical method owing to its ability to distinguish each stoichiometry present in a mixture. In addition, advanced mass spectrometry approaches (reactive probing, fragmentation techniques, ion mobility spectrometry, ion spectroscopy) provide more detailed information on the complexes. Here, we review the fundamentals of mass spectrometry and all its particularities when studying noncovalent nucleic acid structures, and then review what has been learned thanks to mass spectrometry on nucleic acid structures, self-assemblies (e.g., duplexes or G-quadruplexes), and their complexes with ligands.
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Affiliation(s)
- Eric Largy
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Alexander König
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Anirban Ghosh
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Debasmita Ghosh
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Sanae Benabou
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Frédéric Rosu
- Univ. Bordeaux, CNRS, INSERM, IECB, UMS 3033, F-33600 Pessac, France
| | - Valérie Gabelica
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
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G-Quadruplex surveillance in BCL-2 gene: a promising therapeutic intervention in cancer treatment. Drug Discov Today 2017; 22:1165-1186. [PMID: 28506718 DOI: 10.1016/j.drudis.2017.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 03/20/2017] [Accepted: 05/05/2017] [Indexed: 02/07/2023]
Abstract
Recently, therapeutic implications of BCL-2 quadruplex invigorated the field of clinical oncology. This Keynote review discusses how a BCL-2 quadruplex-selective approach circumvents the limitations of existing therapeutics; and which improvisations might ameliorate the recent trends of quadruplex-based treatment.
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Abstract
G-quadruplexes are non-canonical secondary structures found in guanine rich regions of DNA and RNA. Reports have indicated the wide occurrence of RNA G-quadruplexes across the transcriptome in various regions of mRNAs and non-coding RNAs. RNA G-quadruplexes have been implicated in playing an important role in translational regulation, mRNA processing events and maintenance of chromosomal end integrity. In this review, we summarize the structural and functional aspects of RNA G-quadruplexes with emphasis on recent progress to understand the protein/trans factors binding these motifs. With the revelation of the importance of these secondary structures as regulatory modules in biology, we have also evaluated the various advancements towards targeting these structures and the challenges associated with them. Apart from this, numerous potential applications of this secondary motif have also been discussed.
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Affiliation(s)
- Prachi Agarwala
- Proteomics and Structural Biology Unit, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India.
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Tan W, Zhou J, Gu J, Xu M, Xu X, Yuan G. Probing the G‑quadruplex from hsa-miR-3620-5p and inhibition of its interaction with the target sequence. Talanta 2016; 154:560-6. [PMID: 27154715 DOI: 10.1016/j.talanta.2016.02.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/12/2016] [Accepted: 02/17/2016] [Indexed: 12/21/2022]
Abstract
G-quadruplexes have been reported to exist both in human genome and transcriptome and are of great interests due to their important biological functions. Up to now, the formation and property of G-quadruplex in human mature microRNAs has not been explored yet. In this study, we discovered that hsa-miR-3620-5p, a guanine rich human mature microRNA, could fold into a stable parallel G-quadruplex in near physiological condition for the first time. We explored the formation, folding pattern and binding affinity of the miR-3620-5p G-quadruplex by ESI-MS, CD, NMR and SPR. The results indicated that its high-order structure was comprised of three G-quartets with two bases in each parallel loop stretching outward and two bases flanking at each end. In addition, sanguinarine, a natural alkaloid screened from traditional Chinese medicine was characterized to have high binding affinity and thermodynamic stabilization effects through π-π stacking interaction with the external G-quartets. Furthermore, the potent interaction of sanguinarine with miR-3620-5p G-quadruplex could block the base pairing between miR-3620-5p and its target sequence. Therefore, our study revealed the possibility of regulating microRNA functions using potent G-quadruplex binders, and could provide a new approach to affect the microRNA:mRNA interactions.
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Affiliation(s)
- Wei Tan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jiang Zhou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Jiangyong Gu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ming Xu
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Xiaojie Xu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Gu Yuan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
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Laughlin S, Wilson WD. May the Best Molecule Win: Competition ESI Mass Spectrometry. Int J Mol Sci 2015; 16:24506-31. [PMID: 26501262 PMCID: PMC4632762 DOI: 10.3390/ijms161024506] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 09/18/2015] [Accepted: 10/09/2015] [Indexed: 02/07/2023] Open
Abstract
Electrospray ionization mass spectrometry has become invaluable in the characterization of macromolecular biological systems such as nucleic acids and proteins. Recent advances in the field of mass spectrometry and the soft conditions characteristic of electrospray ionization allow for the investigation of non-covalent interactions among large biomolecules and ligands. Modulation of genetic processes through the use of small molecule inhibitors with the DNA minor groove is gaining attention as a potential therapeutic approach. In this review, we discuss the development of a competition method using electrospray ionization mass spectrometry to probe the interactions of multiple DNA sequences with libraries of minor groove binding molecules. Such an approach acts as a high-throughput screening method to determine important information including the stoichiometry, binding mode, cooperativity, and relative binding affinity. In addition to small molecule-DNA complexes, we highlight other applications in which competition mass spectrometry has been used. A competitive approach to simultaneously investigate complex interactions promises to be a powerful tool in the discovery of small molecule inhibitors with high specificity and for specific, important DNA sequences.
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Affiliation(s)
- Sarah Laughlin
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA.
| | - W David Wilson
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA.
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Structure-based virtual screening of novel natural alkaloid derivatives as potential binders of h-telo and c-myc DNA G-quadruplex conformations. Molecules 2014; 20:206-23. [PMID: 25547724 PMCID: PMC6272608 DOI: 10.3390/molecules20010206] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 12/15/2014] [Indexed: 01/08/2023] Open
Abstract
Several ligands can bind to the non-canonical G-quadruplex DNA structures thereby stabilizing them. These molecules can act as effective anticancer agents by stabilizing the telomeric regions of DNA or by regulating oncogene expression. In order to better interact with the quartets of G-quadruplex structures, G-binders are generally characterized by a large aromatic core involved in π-π stacking. Some natural flexible cyclic molecules from Traditional Chinese Medicine have shown high binding affinity with G-quadruplex, such as berbamine and many other alkaloids. Using the structural information available on G-quadruplex structures, we performed a high throughput in silico screening of commercially available alkaloid derivative databases by means of a structure-based approach based on docking and molecular dynamics simulations against the human telomeric sequence d[AG3(T2AG3)3] and the c-myc promoter structure. We identified 69 best hits reporting an improved theoretical binding affinity with respect to the active set. Among them, a berberine derivative, already known to remarkably inhibit telomerase activity, was related to a better theoretical affinity versusc-myc.
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Desgrouas C, Taudon N, Bun SS, Baghdikian B, Bory S, Parzy D, Ollivier E. Ethnobotany, phytochemistry and pharmacology of Stephania rotunda Lour. JOURNAL OF ETHNOPHARMACOLOGY 2014; 154:537-563. [PMID: 24768769 DOI: 10.1016/j.jep.2014.04.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 04/11/2014] [Accepted: 04/12/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Stephania rotunda Lour. (Menispermaceae) is an important traditional medicinal plant that is grown in Southeast Asia. The stems, leaves, and tubers have been used in the Cambodian, Lao, Indian and Vietnamese folk medicine systems for years to treat a wide range of ailments, including asthma, headache, fever, and diarrhoea. AIM OF THE REVIEW To provide an up-to-date, comprehensive overview and analysis of the ethnobotany, phytochemistry, and pharmacology of Stephania rotunda for its potential benefits in human health, as well as to assess the scientific evidence of traditional use and provide a basis for future research directions. MATERIAL AND METHODS Peer-reviewed articles on Stephania rotunda were acquired via an electronic search of the major scientific databases (Pubmed, Google Scholar, and ScienceDirect). Data were collected from scientific journals, theses, and books. RESULTS The traditional uses of Stephania rotunda were recorded in countries throughout Southeast Asia (Cambodia, Vietnam, Laos, and India). Different parts of Stephania rotunda were used in traditional medicine to treat about twenty health disorders. Phytochemical analyses identified forty alkaloids. The roots primarily contain l-tetrahydropalmatine (l-THP), whereas the tubers contain cepharanthine and xylopinine. Furthermore, the chemical composition differs from one region to another and according to the harvest period. The alkaloids exhibited approximately ten different pharmacological activities. The main pharmacological activities of Stephania rotunda alkaloids are antiplasmodial, anticancer, and immunomodulatory effects. Sinomenine, cepharanthine, and l-stepholidine are the most promising components and have been tested in humans. The pharmacokinetic parameters have been studied for seven compounds, including the three most promising compounds. The toxicity has been evaluated for liriodenine, roemerine, cycleanine, l-tetrahydropalmatine, and oxostephanine. CONCLUSION Stephania rotunda is traditionally used for the treatment of a wide range of ailments. Pharmacological investigations have validated different uses of Stephania rotunda in folk medicine. The present review highlights the three most promising compounds of Stephania rotunda, which could constitute potential leads in various medicinal fields, including malaria and cancer.
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Affiliation(s)
- Camille Desgrouas
- UMR-MD3, IRBA, Faculté de Pharmacie, 27 boulevard Jean Moulin CS30064 13385 Marseille cedex 5, Aix-Marseille Université, France; UMR-MD3, Laboratoire de Pharmacognosie et Ethnopharmacologie, Faculté de Pharmacie, 27 boulevard Jean Moulin CS30064 13385 Marseille cedex 5, Aix-Marseille Université, France.
| | | | - Sok-Siya Bun
- UMR-MD3, Laboratoire de Pharmacognosie et Ethnopharmacologie, Faculté de Pharmacie, 27 boulevard Jean Moulin CS30064 13385 Marseille cedex 5, Aix-Marseille Université, France.
| | - Beatrice Baghdikian
- UMR-MD3, Laboratoire de Pharmacognosie et Ethnopharmacologie, Faculté de Pharmacie, 27 boulevard Jean Moulin CS30064 13385 Marseille cedex 5, Aix-Marseille Université, France.
| | - Sothavireak Bory
- Faculté de Pharmacie, Université des Sciences de la Santé, no. 73, Monivong Blvd, Daun Penh, Phnom Penh, Cambodia.
| | - Daniel Parzy
- UMR-MD3, IRBA, Faculté de Pharmacie, 27 boulevard Jean Moulin CS30064 13385 Marseille cedex 5, Aix-Marseille Université, France.
| | - Evelyne Ollivier
- UMR-MD3, Laboratoire de Pharmacognosie et Ethnopharmacologie, Faculté de Pharmacie, 27 boulevard Jean Moulin CS30064 13385 Marseille cedex 5, Aix-Marseille Université, France.
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Tan W, Zhou J, Yuan G. Electrospray ionization mass spectrometry probing of binding affinity of berbamine, a flexible cyclic alkaloid from traditional Chinese medicine, with G-quadruplex DNA. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:143-147. [PMID: 24285399 DOI: 10.1002/rcm.6763] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/05/2013] [Accepted: 10/05/2013] [Indexed: 06/02/2023]
Abstract
RATIONALE Classic G-quadruplex binders typically have a large aromatic core and interact with G-quadruplexes through π-π stacking with the quartets. There are rather few reports on natural flexible cyclic molecule from traditional Chinese medicine which has high binding affinity with G-quadruplex. METHODS Electrospray ionization mass spectrometry (ESI-MS) experiments were performed to evaluate the binding affinities of a natural alkaloid, berbamine, with seven G-quadruplexes. Furthermore, we utilized autodock4 analysis to uncover the binding mode of berbamine with the G-quadruplex. RESULTS ESI-MS experiments showed that berbamine has the best binding affinity toward the (GGA)8 G-quadruplex compared with the other six G-quadruplexes. Autodock4 analysis indicated that berbamine interacted with the (GGA)8 G-quadruplex through hydrogen bonding and van der Waals forces with a binding site at the lateral groove formed by DG8-DA9-DA15-DG16. CONCLUSIONS In this study, we discovered a novel G-quadruplex binder, berbamine, which has high binding affinity toward the (GGA)8 G-quadruplex. This study provided important clues regarding the probing of small molecule from traditional Chinese medicine which can target the G-quadruplex with high affinity.
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Affiliation(s)
- Wei Tan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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The effect of pyridyl substituents on the thermodynamics of porphyrin binding to G-quadruplex DNA. Bioorg Med Chem 2013; 21:7515-22. [DOI: 10.1016/j.bmc.2013.09.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 09/07/2013] [Accepted: 09/14/2013] [Indexed: 11/22/2022]
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Molecular basis of recognition of quadruplexes human telomere and c-myc promoter by the putative anticancer agent sanguinarine. Biochim Biophys Acta Gen Subj 2013; 1830:4189-201. [DOI: 10.1016/j.bbagen.2013.03.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 03/19/2013] [Accepted: 03/26/2013] [Indexed: 01/24/2023]
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