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M9490570.TXT
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1994-09-24
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Document 0570
DOCN M9490570
TI Structural similarity between the p17 matrix protein of HIV-1 and
interferon-gamma.
DT 9411
AU Matthews S; Barlow P; Boyd J; Barton G; Russell R; Mills H; Cunningham
M; Meyers N; Burns N; Clark N; et al; Department of Biochemistry,
University of Oxford, UK.
SO Nature. 1994 Aug 25;370(6491):666-8. Unique Identifier : AIDSLINE
MED/94344244
AB The human immunodeficiency virus (HIV) matrix protein, p17, forms the
outer shell of the core of the virus, lining the inner surface of the
viral membrane. The protein has several key functions. It orchestrates
viral assembly via targeting signals that direct the gag precursor
polyprotein, p55, to the host cell membrane and it interacts with the
transmembrane protein, gp41, to retain the env-encoded proteins in the
virus. In addition, p17 contains a nuclear localization signal that
directs the preintegration complex to the nucleus of infected cells.
This permits the virus to infect productively non-dividing cells, a
distinguishing feature of HIV and other lentiviruses. We have determined
the solution structure of p17 by nuclear magnetic resonance (NMR) with a
root-mean square deviation for the backbone of the well-defined regions
of 0.9 A. It consists of four helices connected by short loops and an
irregular, mixed beta-sheet which provides a positively charged surface
for interaction with the inner layer of the membrane. The helical
topology is unusual; the Brookhaven protein database contains only one
similar structure, that of the immune modulator interferon-gamma.
DE Amino Acid Sequence Cloning, Molecular Computer Graphics Databases,
Factual Escherichia coli Gene Products, gag/*CHEMISTRY Human HIV
Antigens/*CHEMISTRY *HIV-1 Interferon Type II/*CHEMISTRY Molecular
Sequence Data Nuclear Magnetic Resonance Protein Conformation
Recombinant Proteins Sequence Homology, Amino Acid Support, Non-U.S.
Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).