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- W3135299970 abstract "Summary Programmed ribosomal frameshifting (PRF) is a translational recoding mechanism that enables the synthesis of multiple polypeptides from a single transcript. In the alphavirus structural polyprotein, -1PRF is coordinated by a “slippery” sequence in the transcript, an RNA stem-loop, and a conformational transition in the nascent polypeptide chain. To characterize each of these effectors, we measured the effects of 4,530 mutations on -1PRF by deep mutational scanning. While most mutations within the slip-site and stem-loop disrupt -1PRF, mutagenic effects upstream of the slip-site are far more variable. Molecular dynamics simulations of polyprotein biogenesis suggest many of these mutations alter stimulatory forces on the nascent chain through their effects on translocon-mediated cotranslational folding. Finally, we provide evidence suggesting the coupling between cotranslational folding and -1PRF depends on the translation kinetics upstream of the slip-site. These findings demonstrate how -1PRF is coordinated by features within both the transcript and nascent chain." @default.
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- W3135299970 date "2021-03-11" @default.
- W3135299970 modified "2023-10-15" @default.
- W3135299970 title "Coordination of -1 Programmed Ribosomal Frameshifting by Transcript and Nascent Chain Features Revealed by Deep Mutational Scanning" @default.
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- W3135299970 doi "https://doi.org/10.1101/2021.03.11.435011" @default.
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