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Bonnat L, Bar L, Génnaro B, Bonnet H, Jarjayes O, Thomas F, Dejeu J, Defrancq E, Lavergne T. Template-Mediated Stabilization of a DNA G-Quadruplex formed in the HIV-1 Promoter and Comparative Binding Studies. Chemistry 2017; 23:5602-5613. [PMID: 28264144 DOI: 10.1002/chem.201700417] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Indexed: 02/06/2023]
Abstract
G-rich DNA oligonucleotides derived from the promoter region of the HIV-1 long terminal repeat (LTR) were assembled onto an addressable cyclopeptide platform through sequential oxime ligation, a thiol-iodoacetamide SN2 reaction, and copper-catalyzed azide-alkyne cycloaddition reactions. The resulting conjugate was shown to fold into a highly stable antiparallel G4 architecture as demonstrated by UV, circular dichroism (CD), and NMR spectroscopic analysis. The binding affinities of six state-of-the-art G4-binding ligands toward the HIV-G4 structure were compared to those obtained with a telomeric G4 structure and a hairpin structure. Surface plasmon resonance binding analysis provides new insights into the binding mode of broadly exploited G4 chemical probes and further suggests that potent and selective recognition of viral G4 structures of functional significance might be achieved.
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Affiliation(s)
- Laureen Bonnat
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France.,Univ. Grenoble Alpes, CNRS, DPM UMR-5063, 38000, Grenoble, France
| | - Laure Bar
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Béatrice Génnaro
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Hugues Bonnet
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Olivier Jarjayes
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Fabrice Thomas
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Jérôme Dejeu
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Eric Defrancq
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
| | - Thomas Lavergne
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, 38000, Grenoble, France
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