PMID: 19173611

Authors:

Campbell NH, Patel M, Tofa AB, Ghosh R, Parkinson GN, Neidle S

Title:

Selectivity in Ligand Recognition of G-Quadruplex Loops (dagger).

Journal:

Biochemistry. 2009 Feb 4.

Abstract:

A series of disubstituted acridine ligands have been cocrystallized with a bimolecular DNA G-quadruplex. The ligands have a range of cyclic amino end groups of varying size. The crystal structures show that the diagonal loop in this quadruplex results in a large cavity for these groups, in contrast to the steric constraints imposed by propeller loops in human telomeric quadruplexes. We conclude that the nature of the loop has a significant influence on ligand selectivity for particular quadruplex folds.