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1994-10-25
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Document 3277
DOCN M94A3277
TI Patterns of amino acid substitutions in the third variable envelope
region for HIV within a host.
DT 9412
AU Gojobori T; Yamaguchi Y; National Institute of Genetics, Shizuoka,
Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):112 (abstract no. PA0069). Unique
Identifier : AIDSLINE ICA10/94369298
AB OBJECTIVE: The purpose of this study is to examine the patterns of amino
acid changes in the third variable envelope (V3) region of HIV by
phylogenetic methods. The substitution patterns obtained would be useful
to develop effective vaccines. METHODS: We constructed phylogenetic
trees by use of nucleotide sequences of HIV within a host. Then, we
estimated the number of each kind of amino acid substitutions for the V3
region. RESULTS: We found hypervariable sites in the V3 region. At these
hypervariable sites, certain types of amino acid substitutions were
dominantly favored by HIV. In particular, it is observed that most of
amino acid substitutions were caused by single nucleotide substitutions
at each codon. DISCUSSION AND CONCLUSIONS: The pattern of amino acid
substitutions in the V3 region is dominantly determined by particular
types of amino acid changes at the hypervariable sites. This feature can
be utilized for future development of synthesized vaccines by predicting
evolutionary direction of HIV.
DE Amino Acid Sequence AIDS Vaccines/ISOLATION & PURIF Codon/GENETICS
Evolution Human HIV/*GENETICS/ISOLATION & PURIF HIV Envelope Protein
gp120/*GENETICS HIV Infections/MICROBIOLOGY Peptide
Fragments/*GENETICS Phylogeny *Variation (Genetics) MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).