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- W2155440106 abstract "Here we report that the specificity of peptide release in the ribosome on a nonstop mRNA by ArfA and RF2 is achieved by an induced-fit mechanism. Using RF2 that is methylated on the glutamine of its GGQ motif (RF2(m)), we show that methylation substantially increases the rate of ArfA/RF2-catalyzed peptide release on a nonstop mRNA that does not occupy the ribosomal A site, but has only a modest effect on k(cat) by the same proteins on longer nonstop mRNAs occupying the A site of the mRNA channel in the ribosome. Our data suggest that enhancement in the kcat of peptide release by ArfA and RF2 under the cognate decoding condition is the result of favorable conformational changes in the nonstop complex. We demonstrate a shared mechanism between canonical and nonstop termination, supported by similarities in the kinetic mechanisms in antibiotic inhibition and methylation-correlated enhancement in the rate of peptide release. Despite these similarities, our data suggest that nonstop termination differs from canonical pathway in the downstream event of recycling." @default.
- W2155440106 created "2016-06-24" @default.
- W2155440106 creator A5025125604 @default.
- W2155440106 creator A5086659331 @default.
- W2155440106 date "2015-11-09" @default.
- W2155440106 modified "2023-10-13" @default.
- W2155440106 title "Peptide release promoted by methylated RF2 and ArfA in nonstop translation is achieved by an induced-fit mechanism" @default.
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- W2155440106 doi "https://doi.org/10.1261/rna.053082.115" @default.
- W2155440106 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4691834" @default.
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