Journal
BIOORGANIC & MEDICINAL CHEMISTRY
Volume 9, Issue 9, Pages 2381-2385Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0968-0896(01)00160-2
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Naphthyridine dimer composed of two 2-amino-1,8-naphthyridines and a connecting linker strongly binds to guanine-guanine (G-G) mismatch in duplex DNA. In order to improve G-G selectivity for the binding, we have examined structure modification of the linker. A new naphthyridine dimer possessing 3,6-diazaoctanedioic acid linker binds to G-G mismatch with an association constant of 1.18 x 10(7) M-1, which is somewhat weaker than that of the original naphthyridine dimer having a shorter connecting linker. However, the binding of the modified naphthyridine dimer to G-A mismatch was almost negligible as compared to that of the original. This results in a net increase of the selectivity for the binding to G-G mismatch by 4-folds. (C) 2001 Elsevier Science Ltd. All rights reserved.
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