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Lubkowski J , Yang F , Alexandratos J , Wlodawer A , Zhao H , Burke TR , Neamati N , Pommier Y , Merkel G , Skalka AM
Structure of the catalytic domain of avian sarcoma virus integrase with a bound HIV-1 integrase-targeted inhibitor
Proceedings of the National Academy of Sciences of the United States of America. 1998 Apr 28;95(9) :4831-4836
PMID: ISI:000073415700011   
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Abstract
The x-ray structures of an inhibitor complex of the catalytic core domain of avian sarcoma virus integrase (ASV IN) were solved at 1.9- to 2.0-Angstrom resolution at two pH values, with and without Mn2+ cations. This inhibitor (Y-3), originally identified in a screen for inhibitors of the catalytic activity of HIV type 1 integrase (HIV-1 IN), was found in the present study to be active against ASV IN as well as HIV-1 IN. The Y-3 molecule is located in close proximity to the enzyme active site, interacts with the flexible loop, alters loop conformation, and affects the conformations of active site residues. As crystallized, a Y-3 molecule stacks against its symmetry-related mate. Preincubation of IN with metal cations does not prevent inhibition, and Y-3 binding does not prevent binding of divalent cations to IN. Three compounds chemically related to Y-3 also were investigated, but no binding was observed in the crystals. Our results identify the structural elements of the inhibitor that likely determine its binding properties.
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Times Cited: 28 English Article ZL269 PROC NAT ACAD SCI USA