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Topology Specific Stabilization of Promoter over Telomeric G-Quadruplex DNAs by Bisbenzimidazole Carboxamide Derivatives

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Title Topology Specific Stabilization of Promoter over Telomeric G-Quadruplex DNAs by Bisbenzimidazole Carboxamide Derivatives
 
Creator DHAMODHARAN, V
HARIKRISHNA, S
BHASIKUTTAN, AC
PRADEEPKUMAR, PI
 
Subject POLYMERASE STOP ASSAY
RNA G-QUADRUPLEX
BINDING LIGANDS
K+ SOLUTION
THERAPEUTIC TARGETS
CANCER-CELLS
HUMAN GENOME
INHIBITION
COMPLEXES
DESIGN
 
Description Various potential G-quadruplex forming sequences present in the genome offer a platform to modulate their function by means of stabilizing molecules. Though G-quadruplex structures exhibit diverse structural topologies, the presence of G-quartets as a common structural element makes the design of topology specific ligands a daunting task. To address this, the subtle structural variations of loops and grooves present in the quadruplex structures can be exploited. To this end, we report the design and synthesis of quadruplex stabilizing agents based on bisbenzimidazole carboxamide derivatives of pyridine, 1,8-naphthyridine, and 1,10-phenanthroline. The designed ligands specifically bind to and stabilize promoter quadruplexes having parallel topology over any of the human telomeric quadruplex topologies (parallel, hybrid, or antiparallel) and duplex DNAs. CD melting studies indicate that ligands could impart higher stabilization to c-MYC and c-KIT promoter quadruplexes (up to 21 degrees C increment in Tm) than telomeric and duplex DNAs (Delta T-m
 
Publisher AMER CHEMICAL SOC
 
Date 2016-01-15T06:21:32Z
2016-01-15T06:21:32Z
2015
 
Type Article
 
Identifier ACS CHEMICAL BIOLOGY, 10(3)821-833
1554-8929
1554-8937
http://dx.doi.org/10.1021/cb5008597
http://dspace.library.iitb.ac.in/jspui/handle/100/17919
 
Language en