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M94A3255.TXT
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1994-10-25
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Document 3255
DOCN M94A3255
TI Difference in surface structure between mature and defective HIV virus
particles.
DT 9412
AU Morita C; Ashina T; Sukenaga A; Ikuta K; Goto T; Nakai M; Department of
Microbiology, Osaka Medical College, Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):118 (abstract no. PA0093). Unique
Identifier : AIDSLINE ICA10/94369320
AB OBJECTIVE: Surface projections(knobs) are essential for binding HIV-1 to
target cells, and spontaneous loss of them reduces infectivity of HIV-1.
Our objective is to clarify the structure difference of surface
projections between mature and defective particles. METHOD: Persistently
HIV-1 infected Molt-4 and infected MT4 cell derived subclone L-2 were
used. L-2 produced defective doughnut-shaped HIV-1 particles (K. Ohki et
al. J. AIDS 4:1233-1240, 1991). These structures were investigated by
TEM, SEM and STM. TEM specimens were examined after the staining of
envelope glycoproteins with either tannic acid or ruthenium red. RESULT:
The size of the mature particle showed a narrow range of diameter
included knobs with a mean of 122 nm. This size is similar to the SEM
data. On the other hand L-2 particles reveal a large variation with a
mean of 139 nm. The size distributions of the knob on mature and
defective virions are 17 nm and 11 nm respectively. Mature particles are
smaller than defective particles, but the size of knobs is larger than
L-2 ones. DISCUSSION AND CONCLUSION: We have extended the above study by
using ruthenium red techniques. This can be useful for studying the
projection structure. Defective particles had the small size of their
surface knobs, suggesting the low yield of infectivity.
DE Cell Line Comparative Study Defective Viruses/GROWTH &
DEVELOPMENT/PATHOGENICITY/ *ULTRASTRUCTURE Human HIV-1/GROWTH &
DEVELOPMENT/PATHOGENICITY/*ULTRASTRUCTURE Microscopy, Electron
Microscopy, Electron, Scanning Microscopy, Electron, Scanning
Transmission Particle Size Ruthenium Red Viral Envelope
Proteins/ULTRASTRUCTURE MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).