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• W1966804706 abstract "The HIV-1 envelope glycoprotein binds cooperatively to its cellular receptor CD4 and a coreceptor, principally CXCR4 or CCR5. We have previously improved a natural amino-acid form of a scorpion toxin-derived CD4-mimetic peptide and in parallel generated sulfopeptide mimetics of the CCR5 amino terminus. Here we show that some fusions of these CCR5- and CD4-mimetic peptides, expressed as immunoadhesins, neutralize HIV-1 more efficiently than CD4-Fc or equimolar mixtures of immunoadhesin forms of each peptide. Specifically, double-mimetic peptides with linkers of 11 amino acids or greater, and with the CCR5-mimetic component preceding the CD4-mimetic component, were more efficient than constructs with shorter linkers or in a reverse orientation. The potency of these constructs derives from (i) their ability to simultaneously and cooperatively bind the CD4- and CCR5-binding sites of a single gp120 monomer of the HIV-1 envelope glycoprotein trimer and (ii) the ability of the CCR5-mimetic component to prevent the CD4-mimetic peptide from promoting infection when cellular CD4 is limiting. Thus, there is a significant advantage to simultaneously targeting both conserved regions of the HIV-1 envelope glycoprotein.This report describes a novel class of peptides that potently inhibit HIV-1 entry. These peptides simultaneously target the receptor- and coreceptor-binding sites of the HIV-1 envelope glycoprotein gp120. Peptides of this class overcome key limitations of inhibitors that target only one gp120 binding region and illustrate the utility of binding the sulfotyrosine-binding pockets of gp120." @default.
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• W1966804706 date "2014-03-15" @default.
• W1966804706 modified "2023-09-27" @default.
• W1966804706 title "A Double-Mimetic Peptide Efficiently Neutralizes HIV-1 by Bridging the CD4- and Coreceptor-Binding Sites of gp120" @default.
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• W1966804706 doi "https://doi.org/10.1128/jvi.03800-13" @default.
• W1966804706 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3957931" @default.
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