Photo-cross-linking studies suggest a model for the architecture of an active human immunodeficiency virus type 1 integrase-DNA complex. NLM AIDSLINE Important note: Information in this article was accurate in 1998. The state of the art may have changed since the publication date.

Click here to return to AIDSLINE main menu
DonateNow
Print this Article


Photo-cross-linking studies suggest a model for the architecture of an active human immunodeficiency virus type 1 integrase-DNA complex.

Biochemistry. 1998 May 12;37(19):6667-78. Unique Identifier : AIDSLINE MED/98244844
Heuer TS; Brown PO; Department of Biochemistry, Program in Cancer Biology, Stanford; University Medical Center, California 94305-5428, USA.

Abstract: The virally encoded integrase protein carries out retroviral integration, which requires specific interactions with the two ends of the viral DNA, and also with host DNA that is the target of integration. We attached a photo-cross-linking agent to specific viral and target DNA sites to identify regions of the integrase polypeptide that are in close proximity to those substrate features in the active integrase-DNA complex. The active form of integrase is a multimer. The higher-order organization of the active integration complex was therefore investigated by determining whether specific cross-links occurred to the active-site containing protomer. Both viral and target DNA cross-links to human immunodeficiency virus type 1 (HIV-1) integrase mapped predominantly to integrase protomers in trans to the active site, in a multimeric integrase complex. The results provide the basis for a model of the protein-DNA architecture of an active HIV-1 integration complex that suggests specific functions for the N-terminal, core, and C-terminal domains of retroviral integrase. One implication of this model is that the integrase multimer that mediates concerted integration of the viral DNA ends is composed of at least eight integrase protomers.
Keywords: *Cross-Linking Reagents/CHEMISTRY *DNA, Viral/CHEMISTRY *HIV Integrase/CHEMISTRY *HIV-1/ENZYMOLOGY *Models, MolecularKWDcross-linkingreagents/chemistryKWDdna,viral/chemistryKWDhivintegrase/chemistryKWDhiv-1/enzymologyKWDmodels,molecular
980830
M9881186

Copyright © 1998 - National Library of Medicine. Reproduced under license with the National Library of Medicine, Bethesda, MD.

AEGiS is a 501(c)3, not-for-profit, tax-exempt, educational corporation. AEGiS is made possible through unrestricted funding from Boehringer Ingelheim, Bridgestone/Firestone Charitable Trust, Bristol-Myers Squibb Company, Elton John AIDS Foundation, Gill Foundation, the National Library of Medicine, Quest Diagnostics, Roche and Trimeris, and donations from users like you. Always watch for outdated information. This article first appeared in 1998. This material is designed to support, not replace, the relationship that exists between you and your doctor.

AEGiS presents published material, reprinted with permission and neither endorses nor opposes any material. All information contained on this website, including information relating to health conditions, products, and treatments, is for informational purposes only. It is often presented in summary or aggregate form. It is not meant to be a substitute for the advice provided by your own physician or other medical professionals. Always discuss treatment options with a doctor who specializes in treating HIV.

Copyright ©1980, 1998. AEGiS. All materials appearing on AEGiS are protected by copyright as a collective work or compilation under U.S. copyright and other laws and are the property of AEGiS, or the party credited as the provider of the content. .