Sequence selective recognition of DNA by hairpin conjugates of a racemic seco-cyclopropaneindoline-2-benzofurancarboxamide and polyamides
作者:James L Toth、Carly A Price、Erik C Madsen、Heather L Handl、Stephen J Hudson、Richard B Hubbard, III、J.Phillip Bowen、Konstantinos Kiakos、John A Hartley、Moses Lee
DOI:10.1016/s0960-894x(02)00341-4
日期:2002.8
Conjugates of racemic seco-cyclopropaneindoline-2-benzofurancarboxamide (CI-Bf) and four diamides (ImIm 1, ImPy 2, PyIm 3, and PyPy 4, where Py is pyrrole, and Im is imidazole), linked by a gamma-aminobutyrate group were synthesized. In addition to alkylating at adenine-N3 positions within an A(5) sequence, the imidazole-containing compounds 1 and 2 were found to also alkylate purine-N3 positions within a sequence 3'-GGGGGGA(888)CTGCTC(894)-5'. A model for the binding of hairpin conjugates I and 2 with the 3'-GACT-5' sequence is proposed. (C) 2002 Elsevier Science Ltd. All rights reserved.