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1996-02-27
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Document 0323
DOCN M9630323
TI Crystal structure of SIV matrix antigen and implications for virus
assembly.
DT 9603
AU Rao Z; Belyaev AS; Fry E; Roy P; Jones IM; Stuart DI; Laboratory of
Molecular Biophysics, Oxford, UK.
SO Nature. 1995 Dec 14;378(6558):743-7. Unique Identifier : AIDSLINE
MED/96107318
AB Simian immunodeficiency virus (SIV) is closely related to human
immunodeficiency virus (HIV), their matrix antigens (MAs) sharing some
50% sequence identity. MA is a component of Pr55Gag, the sole protein
required for assembly of the virion shell. MA targets Pr55 to the plasma
membrane, and facilitates incorporation of the virus envelope protein
and assembly of the Pr55Gag shell. Cleavage of Pr55 by the viral
protease produces the mature protein of relative molecular mass 17-18K,
which underlies the host-derived membrane and is important in both virus
entry and nuclear localization of the virion core. Here we report the
crystal structure of SIV MA. The molecule forms a trimer consistent with
oligomerization in vitro, the observed virion architecture, and various
biological properties of MA.
DE Amino Acid Sequence Antigens, Viral/*CHEMISTRY/PHYSIOLOGY Computer
Graphics Crystallography, X-Ray Gene Products,
gag/*CHEMISTRY/PHYSIOLOGY Models, Molecular Molecular Sequence Data
Protein Conformation Support, Non-U.S. Gov't SIV/*CHEMISTRY/PHYSIOLOGY
Viral Matrix Proteins/*CHEMISTRY/PHYSIOLOGY Virus Replication JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).