TY - JOUR
T1 - Phylogenetic evaluation of Kenyan HIV type 1 isolates
AU - Poss, M.
AU - Gosink, J.
AU - Thomas, E.
AU - Kreiss, J. K.
AU - Ndinya-Achola, J.
AU - Mandaliya, K.
AU - Bwayo, J.
AU - Overbaugh, J.
PY - 1997
Y1 - 1997
N2 - Diversity among global isolates of HIV-1 presents a formidable challenge for vaccine development. As distinct clades of the virus are recognized, it will be important to monitor their geographic distribution and divergence. In this study, we characterized HIV-1 subtypes from 17 seropositive individuals in Nairobi and Mombasa, Kenya. Seventy-one percent of viruses were clade A and 29% were clade D. The most divergent clade A isolate in our survey, Q45- CxA, grouped closely with two other taxa that were previously reported as having no distinct clade affiliation. Thus, these data may suggest the emergence of an outlier group of clade A variants or a new subtype of HIV-1. Phylogenetic relatedness of the 17 Kenyan isolates was determined separately for C2-V3 and V2 sequences of envelope and subtype designation for these isolates was independent of the region analyzed. However, evaluation of transitions, transversions, and specific character state changes indicated that mutations characterizing V2 differed from those in V3 for clade A and clade D isolates. Comparison of secondary structural characteristics of the V1-V3 region between a clade A and a clade D virus revealed conservation of motifs.
AB - Diversity among global isolates of HIV-1 presents a formidable challenge for vaccine development. As distinct clades of the virus are recognized, it will be important to monitor their geographic distribution and divergence. In this study, we characterized HIV-1 subtypes from 17 seropositive individuals in Nairobi and Mombasa, Kenya. Seventy-one percent of viruses were clade A and 29% were clade D. The most divergent clade A isolate in our survey, Q45- CxA, grouped closely with two other taxa that were previously reported as having no distinct clade affiliation. Thus, these data may suggest the emergence of an outlier group of clade A variants or a new subtype of HIV-1. Phylogenetic relatedness of the 17 Kenyan isolates was determined separately for C2-V3 and V2 sequences of envelope and subtype designation for these isolates was independent of the region analyzed. However, evaluation of transitions, transversions, and specific character state changes indicated that mutations characterizing V2 differed from those in V3 for clade A and clade D isolates. Comparison of secondary structural characteristics of the V1-V3 region between a clade A and a clade D virus revealed conservation of motifs.
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U2 - 10.1089/aid.1997.13.493
DO - 10.1089/aid.1997.13.493
M3 - Article
C2 - 9100991
AN - SCOPUS:0030890915
SN - 0889-2229
VL - 13
SP - 493
EP - 499
JO - AIDS Research and Human Retroviruses
JF - AIDS Research and Human Retroviruses
IS - 6
ER -
