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Journal of Virology, September 1999, p. 7132-7137, Vol. 73, No. 9
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

The Presence of Human Immunodeficiency Virus Type 1 Vpr Correlates with a Decrease in the Frequency of Mutations in a Plasmid Shuttle Vector

Jeremy B. Jowett,1,2 Yi-ming Xie,1 and Irvin S. Y. Chen1,*

Departments of Microbiology & Immunology and Medicine, University of California---Los Angeles School of Medicine, Los Angeles, California 90095-1678,1 and International Diabetes Institute, Caulfield, Victoria 3162, Australia2

Received 21 January 1999/Accepted 3 May 1999

The human immunodeficiency virus type 1 (HIV-1) Vpr protein induces cell cycle arrest at the border of G2 and M similar to the arrest caused by agents which damage DNA. We determined whether the presence of Vpr would affect the ability of cells to repair DNA. We developed a shuttle vector system to analyze the effect of Vpr upon the repair of UV-damaged DNA. Our results demonstrated that the presence of Vpr decreased the rate of deletions in this system. Of note, cells arrested in G2 by other genotoxic agents also increased the frequency of DNA repair of UV-damaged shuttle vectors. We did not observe any direct effect of Vpr upon the rate of double-strand break repair and/or nucleotide excision repair of genomic DNA in cells. Our results suggest a role for HIV-1 Vpr in altering the frequency of DNA repair, a property which may have importance for HIV-1 replication and pathogenesis.

* Corresponding author. Mailing address: Departments of Microbiology & Immunology and Medicine, UCLA School of Medicine, Los Angeles, CA 90095-1678. Phone: (310) 825-4793. Fax: (310) 794-7682. E-mail: rtaweesu{at}ucla.edu.

Journal of Virology, September 1999, p. 7132-7137, Vol. 73, No. 9
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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