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M9610100.TXT
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Document 0100
DOCN M9610100
TI Identification of hypervariable and conserved regions in the surface
envelope gene in the bovine lentivirus.
DT 9601
AU Suarez DL; Whetstone CA; National Animal Disease Center, USDA,
Agriculture Research; Service, Ames, Iowa 50010, USA.
SO Virology. 1995 Oct 1;212(2):728-33. Unique Identifier : AIDSLINE
GENBANK/L43129
AB The surface envelope (SU) gene of nine different isolates of the bovine
lentivirus (BIV) were compared for nucleotide and deduced amino acid
(aa) sequence diversity. Analyses were done both on isolates derived
from the original reference strain, R29, and on field isolates of BIV.
Six conserved and six hypervariable regions were identified. Many of the
hypervariable regions were located in areas predicted to be on the
surface of the SU protein. The SU gene comparison among all isolates
showed up to a 50% aa sequence divergence. When a conserved region of
the reverse transcriptase gene was compared among eight of the isolates,
there was less than 11% aa sequence divergence. When comparing all
isolates, the greatest size differences in the SU gene are observed in
the 2nd hypervariable region (V2) with up to a 104-aa difference between
the largest and smallest variant. R29-106, an infectious molecular clone
of the original isolate of BIV, has an 87-bp deletion in V2 as compared
to prototype isolate R29-127. All R29-derived isolates sequenced for
this study had a SU gene size similar to R29-106. The four field
isolates sequenced for this study had SU genes larger than R29-127.
R29-derived isolates may not be representative of BIV currently present
in United States cattle.
DE Amino Acid Sequence Animal Base Sequence Cattle *Conserved Sequence
Genes, env/*GENETICS Lentiviruses, Bovine/*GENETICS Molecular Sequence
Data Sequence Analysis, DNA Sequence Homology, Amino Acid Sequence
Homology, Nucleic Acid Support, U.S. Gov't, Non-P.H.S. Support, U.S.
Gov't, P.H.S. Variation (Genetics)/*GENETICS Viral Envelope
Proteins/CHEMISTRY/*GENETICS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).