Journal
ANTIVIRAL RESEARCH
Volume 81, Issue 3, Pages 267-276Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.antiviral.2008.12.010
Keywords
HIV-1 integrase inhibitors; Diketo acids; Photoaffinity labeling; Photoprobes
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Funding
- Campbell Foundation
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The diketo acid (DKA) class of HIV-1 integrase (IN) inhibitors is thought to function by chelating divalent metal ions on the enzyme catalytic site. However, differences in mutations conferring resistance to various DKA inhibitors suggest that multiple binding orientations may exist. In order to facilitate identification of DKA binding sites, a series of photoactivable analogues of two potent DKAs was prepared as novel photoaffinity probes. In cross-linking assays designed to measure disruption of substrate DNA binding, the photoprobes behaved similarly to a reference DKA inhibitor. Molecular modeling studies suggest that such photoprobes interact within the IN active site in a manner similar to that of the parent DKAs. Analogues la-c are novel photoaffinity ligands useful in clarifying the HIV-1 binding interactions of DKA inhibitors. (c) 2009 Elsevier B.V. All rights reserved.
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