Furan Based Cyclic Oligopeptides Selectively Target G-Quadruplex

Abstract
We report the binding properties of 18- and 24-membered cyclic oligopeptides developed from a novel furan amino acid, 5-(aminomethyl)-2-furancarboxylic acid, to G-quadruplex. Comparative analysis of the binding data of these ligands with G-quadruplex and double-strand DNA shows that 24-membered cyclic peptides are highly selective for telomeric G-quadruplex structures and thus can be used as a scaffold to target quadruplex structures at the genomic level.