Specific Recognition of Promoter G-quadruplex DNAs by Small Molecule Ligands and Light-up Probes.

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ID: 51440
2019
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Abstract
: G-quadruplexes (G4s) are four-stranded nucleic acid structures whose underlying G-rich sequences are present across the chromosome and transcriptome. These highly structured elements are known to regulate many key biological functions such as replication, transcription, translation, and genomic stability, thereby providing an additional layer of gene regulation. G4s are structurally dynamic and diverse, and can fold into numerous topologies. They are potential targets for small molecules which can modulate their functions. To this end, myriad classes of small molecules have been developed and studied for their ability to bind and stabilize these unique structures. Though many of them can selectively target G4s over duplex DNA, only a few of them can distinguish one G4 topology from others. Design and development of G4-specific ligands are challenging owing to the subtle structural variations among G4 structures. However, screening assays and computational methods have identified a few classes of ligands that preferentially or specifically target the G4 topology of interest over others. This review focuses on the small molecules and fluorescent probes that specifically target human promoter G4s associated with oncogenes. Targeting promoter G4s could circumvent the issues such as undruggability and development of drug resistance associated with the protein targets. The ligands discussed here highlight that development of G4-specific ligands is an achievable goal in spite of the limited structural data available to date. The future goal of the field is to pursue the development of G4-specific ligands endowed with drug-like properties for G4-based therapeutics and diagnostics.
Reference Key
dhamodharan2019specificacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Dhamodharan, V;Pradeepkumar, Pushpangadan Indira;
Journal ACS chemical biology
Year 2019
DOI
10.1021/acschembio.9b00475
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