Human immunodeficiency virus type 1 Vpu protein is an oligomeric type I integral membrane protein.

Abstract:

:The human immunodeficiency virus type 1 Vpu protein is a 16-kDa phosphoprotein which enhances the efficiency of virion production and induces rapid degradation of CD4, the cellular receptor for human immunodeficiency virus. The topology of membrane-inserted Vpu was investigated by using in vitro-synthesized Vpu cotranslationally inserted into canine microsomal membranes. Proteolytic digestion and immunoprecipitation studies revealed that Vpu was a type I integral membrane protein, with the hydrophilic domain projecting from the cytoplasmic membrane face. In addition, several high-molecular-weight proteins containing Vpu were identified by chemical cross-linking. Such complexes also formed when wild-type Vpu and a Tat-Vpu fusion protein were coexpressed. Subsequent analysis by one- and two-dimensional electrophoresis revealed that these high-molecular-weight complexes consisted of homo-oligomers of Vpu. These findings indicate that Vpu is a type I integral membrane protein capable of multimerization.

journal_name

J Virol

journal_title

Journal of virology

authors

Maldarelli F,Chen MY,Willey RL,Strebel K

doi

10.1128/JVI.67.8.5056-5061.1993

subject

Has Abstract

pub_date

1993-08-01 00:00:00

pages

5056-61

issue

8

eissn

0022-538X

issn

1098-5514

journal_volume

67

pub_type

杂志文章