JVI Figure table search 04
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Carteau, S.
Right arrow Articles by Bushman, F. D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Carteau, S.
Right arrow Articles by Bushman, F. D.

 Previous Article  |  Next Article 

Journal of Virology, August 1999, p. 6670-6679, Vol. 73, No. 8
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Coupled Integration of Human Immunodeficiency Virus Type 1 cDNA Ends by Purified Integrase In Vitro: Stimulation by the Viral Nucleocapsid Protein

Sandrine Carteau,1 Robert J. Gorelick,2 and Frederic D. Bushman1,*

Infectious Disease Laboratory, Salk Institute, La Jolla, California 92037,1 and AIDS Vaccine Program, SAIC Frederick, National Cancer Institute, Frederick Cancer Research and Development Center, Frederick, Maryland 217022

Received 11 February 1999/Accepted 30 April 1999

Integration of retroviral cDNA involves coupled joining of the two ends of the viral genome at precisely spaced positions in the host cell DNA. Correct coupled joining is essential for viral replication, as shown, for example, by the finding that viral mutants defective in coupled joining are defective in integration and replication. To date, reactions with purified human immunodeficiency virus type 1 (HIV-1) integrase protein in vitro have supported mainly uncoupled joining of single cDNA ends. We have analyzed an activity stimulating coupled joining present in HIV-1 virions, which led to the finding that the HIV-1 nucleocapsid (NC) protein can stimulate coupled joining more than 1,000-fold under some conditions. The requirements for stimulating coupled joining were investigated in assays with mutant NC proteins, revealing that mutations in the zinc finger domains can influence stimulation of integration. These findings (i) provide a means for assembling more authentic integrase complexes for mechanistic studies, (ii) reveal a new activity of NC protein in vitro, (iii) indicate a possible role for NC in vivo, and (iv) provide a possible method for identifying a new class of inhibitors that disrupt coupled joining.

* Corresponding author. Mailing address: Infectious Disease Laboratory, Salk Institute, 10010 North Torrey Pines Rd., La Jolla, CA 92037. Phone: (619) 453-4100, ext. 1630. Fax: (619) 554-0341. E-mail: rick_bushman{at}qm.salk.edu.

Journal of Virology, August 1999, p. 6670-6679, Vol. 73, No. 8
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:



Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. Mol. Cell. Biol. Microbiol. Mol. Biol. Rev.
Clin. Vaccine Immunol. ALL ASM JOURNALS

Copyright © 1999 by the American Society for Microbiology. All rights reserved.