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- W2020069072 abstract "One of most intriguing features of the HIV-1 subtype B epidemic in Brazil is the high frequency of isolates exhibiting tryptophan (W) in the tetramer (GWGR) at the tip of the V3 loop. We observed that the frequencies of glutamic and aspartic acids at site 25 of the V3 loop are quite distinct in GWGR isolates compared with viruses with other tetramers. The basic amino acids at sites 11 and 25 of V3 are strongly linked with CCR5-to-CXCR4 coreceptor shift. We therefore predicted phenotype usage and found that GWGR isolates are exclusively CCR5-using. Further evidence of this came from intrahost sequences, where basic amino acid substitutions at sites 11 and 25 emerged only in isolates presenting a tryptophan-to-glycine replacement at the tetramer of the V3. In addition, modeled 3D-structures of the V3 loop of GWGR and GGGR in intrahost viruses differ essentially in the binding region of the coreceptor." @default.
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- W2020069072 date "2008-11-01" @default.
- W2020069072 modified "2023-10-17" @default.
- W2020069072 title "Molecular and structural characterization of HIV-1 subtype B Brazilian isolates with GWGR tetramer at the tip of the V3-loop" @default.
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- W2020069072 doi "https://doi.org/10.1016/j.virol.2008.08.029" @default.
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