The evolutionary significance of certain amino acid substitutions and their consequences for HIV-1 immunogenicity toward HLA's A*0201 and B*27
Identifieur interne : 001E89 ( Main/Exploration ); précédent : 001E88; suivant : 001E90The evolutionary significance of certain amino acid substitutions and their consequences for HIV-1 immunogenicity toward HLA's A*0201 and B*27
Auteurs : Luke Hecht [Royaume-Uni] ; Anton Dormer [États-Unis]Source :
- Bioinformation [ 0973-8894 ] ; 2013.
Abstract
Url:
DOI: 10.6026/97320630009315
PubMed: 23745018
PubMed Central: 3607191
Affiliations:
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">The evolutionary significance of certain amino acid substitutions and their consequences for HIV-1 immunogenicity toward HLA's A*0201 and B*27</title>
<author><name sortKey="Hecht, Luke" sort="Hecht, Luke" uniqKey="Hecht L" first="Luke" last="Hecht">Luke Hecht</name>
<affiliation wicri:level="4"><nlm:aff id="A2">Institute of Evolutionary Biology, The University of Edinburgh, Kings Buildings, Ashworth Laboratories, West Mains Road, Edinburgh EH9 3JT</nlm:aff>
<orgName type="university">Université d'Édimbourg</orgName>
<country>Royaume-Uni</country>
<placeName><settlement type="city">Édimbourg</settlement>
<region type="country">Écosse</region>
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<author><name sortKey="Dormer, Anton" sort="Dormer, Anton" uniqKey="Dormer A" first="Anton" last="Dormer">Anton Dormer</name>
<affiliation wicri:level="2"><nlm:aff id="A1">Washington Adventist University, Department of Biology, 7600 Flower Avenue Takoma Park, Maryland 20721</nlm:aff>
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<placeName><region type="state">Maryland</region>
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<series><title level="j">Bioinformation</title>
<idno type="ISSN">0973-8894</idno>
<idno type="eISSN">0973-2063</idno>
<imprint><date when="2013">2013</date>
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<front><div type="abstract" xml:lang="en"><p><italic>In silico</italic>
tools are employed to examine the evolutionary relationship to possible vaccine peptide candidates' development. This
perspective sheds light on the proteomic changes affecting the creation of HLA specific T-cell stimulating peptide vaccines for HIV.
Full-length sequences of the envelope protein of the HIV subtypes A, B, C and D were obtained through the NCBI Protein database
were aligned using CLUSTALW. They were then analyzed using RANKPEP specific to Human Leukocyte Antigen A*02 and B*27.
Geneious was used to catalogue the collected gp160 sequences and to construct a phylogenic tree. Mesquite was employed for
ancestral state reconstruction to infer the order of amino acid substitutions in the epitopes examined. The results showed that
consensus peptide identified SLAEKNITI had changes that indicated predicted escape mutation in strains of HIV responding to
pressure exerted by CD8+ cells expressing HLA A*02. The predominating 9-mers IRIGPGQAF of gp120 are significantly less
immunogenic toward HLA B*27 than to HLA A*02. The data confirms previous findings on the importance for efficacious binding,
of an arginine residue at the 2<sup>nd</sup>
position of the gag SL9 epitope, and extends this principle to other epitopes which interacts with
HLA B*27. This study shows that the understanding of viral evolution relating T-cell peptide vaccine design is a development that
has much relevance for the creation of personalized therapeutics for HIV treatment.</p>
</div>
</front>
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