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The bridging sheet region of the gp120 subunit of the HIV-1 Env protein interacts with the major virus coreceptors, CCR5 and CXCR4. We examined the impact of mutations in and adjacent to the bridging sheet region of an X4 tropic HIV-1 on membrane fusion and entry inhibitor susceptibility. When the V3-loop of this Env was changed so that CCR5 was used, the effects of these same mutations on CCR5 use...
Characterization of the mechanisms by which HIV-1 enters cells has allowed for an increased understanding of not only tropism and pathogenesis, but also the identification of new targets for rational drug design. Several classes of HIV-1 entry inhibitors have been developed. Antagonists targeting the interaction of the viral envelope protein and receptors on the cell surface, as well as peptides that...
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