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- Document 0571
- DOCN M9620571
- TI Interaction of virion protein Vpr of human immunodeficiency virus type 1
- with cellular transcription factor Sp1 and trans-activation of viral
- long terminal repeat.
- DT 9602
- AU Wang L; Mukherjee S; Jia F; Narayan O; Zhao LJ; Marion Merrell Dow
- Foundation, Department of Microbiology,; Molecular Genetics and
- Immunology, University of Kansas Medical; Center, Kansas City
- 66160-7424, USA.
- SO J Biol Chem. 1995 Oct 27;270(43):25564-9. Unique Identifier : AIDSLINE
- MED/96029641
- AB Acquired immunodeficiency syndrome (AIDS) is a result of replication of
- the human immunodeficiency virus type 1 (HIV-1) predominantly in CD4+ T
- lymphocytes and macrophages. However, most of these cells in vivo are
- immunologically quiescent, a condition restricting HIV-1 replication.
- Vpr is an HIV-1 virion protein suspected to enhance HIV-1 replication in
- vivo. We demonstrate in this report that Vpr specifically activates
- HIV-1 long terminal repeat (LTR)-directed transcription. This effect is
- most pronounced on a minimal promoter from HIV-1 LTR containing the TATA
- box and binding motifs for the ubiquitous cellular transcription factor
- Sp1. Evidence is presented that Vpr interacts with Sp1 when Sp1 is bound
- to the Sp1 motifs within the HIV-1 LTR Both Vpr-Sp1 interaction and Vpr
- trans-activation require a central Leu/Ile-rich domain in Vpr. Our
- findings suggest that Vpr trans-activation through Sp1 is most critical
- for the immediate early transcription of HIV-1 when other positive
- regulators, such as NF-kappa B, are limited or inactive, a condition
- presumably present in vivo. By interacting with Sp1, Vpr also has the
- potential to influence cellular gene expression and cellular functions.
- Thus, therapeutic approaches directed toward blocking the Vpr
- trans-activation function could prove valuable in treating AIDS.
- DE Base Sequence Electrophoresis, Polyacrylamide Gel Gene Products,
- vpr/*METABOLISM Hela Cells Human HIV Long Terminal Repeat/*GENETICS
- HIV-1/*GENETICS Models, Genetic Molecular Sequence Data Precipitin
- Tests Promoter Regions (Genetics)/GENETICS Protein Binding
- Recombinant Proteins/METABOLISM Support, U.S. Gov't, P.H.S.
- *Trans-Activation (Genetics) Transcription Factor, Sp1/*METABOLISM
- Transcription, Genetic Transfection TATA Box Virion/GENETICS JOURNAL
- ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-