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M94A3288.TXT
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1994-10-25
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Document 3288
DOCN M94A3288
TI HIV-1 gp160 processing in furin-defective LoVo cells.
DT 9412
AU Nagai Y; Ohnishi Y; Shioda T; Institute of Medical Science, University
of Tokyo, Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):110 (abstract no. PA0057). Unique
Identifier : AIDSLINE ICA10/94369287
AB Furin, a subtilisin-like mammalian endopprotease, is believed to be
responsible for processing various proprotein precursors of cellular and
viral origin including the gp160 of HIV-1, which share the consensus
processing site motif, Arg-X-Lys/Arg-Arg, for protease recognition. To
confirm and extend the concept that the gp160 is processed by furin, we
used here a cell line, LoVo, which was recently demonstrated to be
furin-defective. Unexpectedly, LoVo cells were found to process gp160 as
efficiently as normal cell lines do, hence being able to fuse with
CD4-expressing HeLa cells and to produce fully infectious virions. On
the other hand, the same cell line was almost totally incapable of
processing Newcastle disease virus (NDV) fusion glycoprotein with a
similar oligobasic cleavage-recognition motif, providing a strong case
of furin-mediated processing. Our present study thus raises a further
need to search and identify the proteinases involved in HIV-1 gp160
processing rather than supports the notion that furin is responsible.
DE Amino Acid Sequence Binding Sites Cell Fusion Cell Line Consensus
Sequence Gene Products, env/GENETICS/*METABOLISM Hela Cells Human
HIV-1/*METABOLISM Molecular Sequence Data Newcastle Disease
Virus/METABOLISM Protein Precursors/GENETICS/*METABOLISM Protein
Processing, Post-Translational Substrate Specificity
Subtilisins/*METABOLISM Viral Fusion Proteins/METABOLISM MEETING
ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).