Interaction of G-quadruplexes with nonintercalating duplex-DNA minor groove binding ligands. Jain, A. K & Bhattacharya, S. Bioconjugate chemistry, 22(12):2355–68, December, 2011.
Interaction of G-quadruplexes with nonintercalating duplex-DNA minor groove binding ligands. [link]Paper  doi  abstract   bibtex   
The enzyme telomerase synthesizes the G-rich DNA strands of the telomere and its activity is often associated with cancer. The telomerase may be therefore responsible for the ability of a cancer cell to escape apoptosis. The G-rich DNA sequences often adopt tetra-stranded structure, known as the G-quadruplex DNA (G4-DNA). The stabilization of the telomeric DNA into the G4-DNA structures by small molecules has been the focus of many researchers for the design and development of new anticancer agents. The compounds which stabilize the G-quadruplex in the telomere inhibit the telomerase activity. Besides telomeres, the G4-DNA forming sequences are present in the genomic regions of biological significance including the transcriptional regulatory and promoter regions of several oncogenes. Inducing a G-quadruplex structure within the G-rich promoter sequences is a potential way of achieving selective gene regulation. Several G-quadruplex stabilizing ligands are known. Minor groove binding ligands (MGBLs) interact with the double-helical DNA through the minor grooves sequence-specifically and interfere with several DNA associated processes. These MGBLs when suitably modified switch their preference sometimes from the duplex DNA to G4-DNA and stabilize the G4-DNA as well. Herein, we focus on the recent advances in understanding the G-quadruplex structures, particularly made by the human telomeric ends, and review the results of various investigations of the interaction of designed organic ligands with the G-quadruplex DNA while highlighting the importance of MGBL-G-quadruplex interactions.
@article{Jain2011,
	title = {Interaction of {G}-quadruplexes with nonintercalating duplex-{DNA} minor groove binding ligands.},
	volume = {22},
	issn = {1520-4812},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/22074555},
	doi = {10.1021/bc200268a},
	abstract = {The enzyme telomerase synthesizes the G-rich DNA strands of the telomere and its activity is often associated with cancer. The telomerase may be therefore responsible for the ability of a cancer cell to escape apoptosis. The G-rich DNA sequences often adopt tetra-stranded structure, known as the G-quadruplex DNA (G4-DNA). The stabilization of the telomeric DNA into the G4-DNA structures by small molecules has been the focus of many researchers for the design and development of new anticancer agents. The compounds which stabilize the G-quadruplex in the telomere inhibit the telomerase activity. Besides telomeres, the G4-DNA forming sequences are present in the genomic regions of biological significance including the transcriptional regulatory and promoter regions of several oncogenes. Inducing a G-quadruplex structure within the G-rich promoter sequences is a potential way of achieving selective gene regulation. Several G-quadruplex stabilizing ligands are known. Minor groove binding ligands (MGBLs) interact with the double-helical DNA through the minor grooves sequence-specifically and interfere with several DNA associated processes. These MGBLs when suitably modified switch their preference sometimes from the duplex DNA to G4-DNA and stabilize the G4-DNA as well. Herein, we focus on the recent advances in understanding the G-quadruplex structures, particularly made by the human telomeric ends, and review the results of various investigations of the interaction of designed organic ligands with the G-quadruplex DNA while highlighting the importance of MGBL-G-quadruplex interactions.},
	number = {12},
	journal = {Bioconjugate chemistry},
	author = {Jain, Akash K and Bhattacharya, Santanu},
	month = dec,
	year = {2011},
	pmid = {22074555},
	keywords = {\#nosource, Animals, Binding Sites, DNA, DNA: chemistry, DNA: metabolism, G-Quadruplexes, Humans, Ligands, Models, Molecular, Telomere, Telomere: chemistry, Telomere: metabolism},
	pages = {2355--68},
}

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