Crystal structure of an intermolecular 2:1 complex between adenine and thymine.Evidence for both Hoogsteen and `quasi-Watson-Crick' interactions

Chandrasekhar, Sosale and Naik, TangaliRavikumar R and Nayak, Susanta K and Row, TayurGuru N (2010) Crystal structure of an intermolecular 2:1 complex between adenine and thymine.Evidence for both Hoogsteen and `quasi-Watson-Crick' interactions. In: Bioorganic & Medicinal Chemistry Letters, 20 (12). pp. 3530-3533.

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Abstract

The titled complex, obtained by co-crystallization (EtOH/25 degrees C),is apparently the only known complex of the free bases. Its crystal structure, as determined by X-ray diffraction at both 90 K and 313 K, showed that one A-T pair involves a Hoogsteen interaction, and the other a Watson-Crick interaction but only with respect to the adenine unit. The absence of a clear-cut Watson-Crick base pair raises intriguing questions about the basis of the DNA double helix. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Bioorganic & Medicinal Chemistry Letters
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Adenine;Base pair;Hoogsteen;Thymine;Watson-Crick;X-ray diffraction
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Chemical Sciences > Organic Chemistry
Date Deposited:	25 Jun 2010 06:07
Last Modified:	19 Sep 2010 06:09
URI:	http://eprints.iisc.ac.in/id/eprint/28562

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