期刊
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
卷 12, 期 21, 页码 3121-3124出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0960-894X(02)00658-3
关键词
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A novel bicyclic mimic of protonated cytosine [1,8-naphthyridin-2,7-(1,8H)-dione, (K)] for Hoogsteen type triplex recognition of guanine has been designed for incorporation into peptide nucleic acids. Bis-PNA clamps with the K base incorporated in the Hoogsteen strand showed a significant stabilization of the triplexes at pH 7 as compared to similar triplexes with PNA oligomers containing either cytosine (6.7degreesC per unit) or pseudoisocytosine (1.5degreesC per unit). Cooperative stabilization was observed when the K units were placed in adjacent positions (similar to3degreesC per unit). (C) 2002 Elsevier Science Ltd. All rights reserved.
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