作者:Jonathan B. Chaires、Jinsong Ren、Donald Hamelberg、Arvind Kumar、Vandna Pandya、David W. Boykin、W. David Wilson
DOI:10.1021/jm049491e
日期:2004.11.1
Competition dialysis was used to study the interactions of 13 substituted aromatic diamidine compounds with 13 nucleic acid structures and sequences. The results show a striking selectivity of these compounds for the triplex structure poly dA:(poly dT)(2), a novel aspect of their interaction with nucleic acids not previously described. The triplex selectivity of selected compounds was confirmed by thermal denaturation studies. Triplex selectivity was found to be modulated by the location of amidine substiuents on the core phenyl-furan-phenyl ring scaffold. Molecular models were constructed to rationalize the triplex selectivity of DB359, the most selective compound in the series. Its triplex selectivity was found to arise from optimal ring stacking on base triplets, along with proper positioning of its amidine substituents to occupy the minor and the major-minor grooves of the triplex. New insights into the molecular recognition of nucleic acid structures emerged from these studies, adding to the list of available design principles for selectively targeting DNA and RNA.
Discovery of new G-quadruplex binding chemotypes
作者:Stephan A. Ohnmacht、Ehsan Varavipour、Rupesh Nanjunda、Ingrida Pazitna、Gloria Di Vita、Mekala Gunaratnam、Arvind Kumar、Mohamed A. Ismail、David W. Boykin、W. David Wilson、Stephen Neidle
DOI:10.1039/c3cc48616h
日期:——
We report a novel furan-based low molecular weight chemotype with high G-quadruplex affinity and potent anti-proliferative activity.