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M9480492.TXT
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1994-08-20
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Document 0492
DOCN M9480492
TI Single amino acid changes in the human immunodeficiency virus type 1
matrix protein block virus particle production.
DT 9410
AU Freed EO; Orenstein JM; Buckler-White AJ; Martin MA; Laboratory of
Molecular Microbiology, National Institute of; Allergy and Infectious
Diseases, Bethesda, Maryland 20892.
SO J Virol. 1994 Aug;68(8):5311-20. Unique Identifier : AIDSLINE
MED/94309204
AB The matrix protein of human immunodeficiency virus type 1 is encoded by
the amino-terminal portion of the Gag precursor and is postulated to be
involved in a variety of functions in the virus life cycle. To define
domains and specific amino acid residues of the matrix protein that are
involved in virus particle assembly, we introduced 35 amino acid
substitution mutations in the human immunodeficiency virus type 1 matrix
protein. Using reverse transcriptase and radioimmunoprecipitation
analyses and transmission electron microscopy, we assessed the mutants
for their ability to form virus particles and to function in the
infection process. This study has identified several domains of the
matrix protein in which single amino acid substitutions dramatically
reduce the efficiency of virus particle production. These domains
include the six amino-terminal residues of matrix, the region of matrix
between amino acids 55 and 59, and the region between amino acids 84 and
95. Single amino acid substitutions in one of these domains (between
matrix amino acids 84 and 88) result in a redirection of the majority of
virus particle formation to sites within cytoplasmic vacuoles.
DE Amino Acid Sequence Cell Line Gene Products, gag/*CHEMISTRY/PHYSIOLOGY
Hela Cells Human HIV Antigens/*CHEMISTRY/PHYSIOLOGY
HIV-1/CHEMISTRY/*PHYSIOLOGY/ULTRASTRUCTURE Microscopy, Electron
Molecular Sequence Data Mutagenesis, Insertional Protein
Precursors/CHEMISTRY Radioimmunoprecipitation Assay Virus
Replication/PHYSIOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).