Download MendeleyStructure of the catalytic domain of avian sarcoma virus integrase with a bound HIV-1 integrase-targeted inhibitor.
Lubkowski, J., Yang, F., Alexandratos, J., Wlodawer, A., Zhao, H., Burke Jr., T.R., Neamati, N., Pommier, Y., Merkel, G., Skalka, A.M.(1998) Proc Natl Acad Sci U S A 95: 4831-4836
- PubMed: 9560188
- DOI: https://doi.org/10.1073/pnas.95.9.4831
- Primary Citation of Related Structures:
1A5V, 1A5W, 1A5X - PubMed 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-A 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.
Organizational Affiliation:
Macromolecular Structure Laboratory, Advanced BioScience Laboratories-Basic Research Program, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, MD 21702, USA.
