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• W1976011619 endingPage "8041" @default.
• W1976011619 startingPage "8033" @default.
• W1976011619 abstract "ABSTRACT The deadly paramyxovirus Nipah virus (NiV) contains a fusion glycoprotein (F) with canonical structural and functional features common to its class. Receptor binding to the NiV attachment glycoprotein (G) triggers F to undergo a two-phase conformational cascade: the first phase progresses from a metastable prefusion state to a prehairpin intermediate (PHI), while the second phase is marked by transition from the PHI to the six-helix-bundle hairpin. The PHI can be captured with peptides that mimic F's heptad repeat regions, and here we utilized a NiV heptad repeat peptide to quantify PHI formation and the half-lives ( t 1/2 ) of the first and second fusion cascade phases. We found that ephrinB2 receptor binding to G triggered ∼2-fold more F than that triggered by ephrinB3, consistent with the increased rate and extent of fusion observed with ephrinB2- versus ephrinB3-expressing cells. In addition, for a series of hyper- and hypofusogenic F mutants, we quantified F-triggering capacities and measured the kinetics of their fusion cascade phases. Hyper- and hypofusogenicity can each be manifested through distinct stages of the fusion cascade, giving rise to vastly different half-lives for the first ( t 1/2 , 1.9 to 7.5 min) or second ( t 1/2 , 1.5 to 15.6 min) phase. While three mutants had a shorter first phase and a longer second phase than the wild-type protein, one mutant had the opposite phenotype. Thus, our results reveal multiple critical parameters that govern the paramyxovirus fusion cascade, and our assays should help efforts to elucidate other class I membrane fusion processes." @default.
• W1976011619 created "2016-06-24" @default.
• W1976011619 creator A5003654135 @default.
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• W1976011619 creator A5085998035 @default.
• W1976011619 date "2010-08-15" @default.
• W1976011619 modified "2023-10-02" @default.
• W1976011619 title "A Quantitative and Kinetic Fusion Protein-Triggering Assay Can Discern Distinct Steps in the Nipah Virus Membrane Fusion Cascade" @default.
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• W1976011619 doi "https://doi.org/10.1128/jvi.00469-10" @default.
• W1976011619 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2916531" @default.
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• W1976011619 hasPublicationYear "2010" @default.
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