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• W3026779910 abstract "Abstract The Ebola virus VP30 protein interacts with the viral nucleoprotein and with host protein RBBP6 via PPxPxY motifs. In these interactions the largely alpha-helical carboxy-terminal domain of the EBOV VP30 engages with the motif such that the prolines adopt non-canonical orientations, as compared to other proline-rich motifs. Affinity tag-purification mass spectrometry identified additional PPxPxY-containing host proteins, including hnRNP L, hnRNPUL1 and PEG10, as VP30 interactors. Of these, hnRNP L and PEG10, like RBBP6, inhibit viral RNA synthesis and EBOV replication, whereas hnRNPUL1 enhances. Further, double knockdown studies support additive effects of RBBP6 and hnRNP L. Binding studies demonstrate variable capacity of PPxPxY motifs to bind VP30 and the extended motif PxPPPPxY is demonstrated to confer optimal binding and to inhibit RNA synthesis, with the fifth proline and the tyrosine being most critical. Competition binding and hydrogen-deuterium exchange studies demonstrate that each protein binds a similar interface on VP30 and impacts VP30 phosphorylation. VP30 therefore represents a novel proline recognition domain that allows multiple host proteins to target a single viral protein-protein interface to modulate viral transcription." @default.
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• W3026779910 date "2020-05-20" @default.
• W3026779910 modified "2023-09-28" @default.
• W3026779910 title "Non-canonical proline-tyrosine interactions with multiple host proteins regulate Ebola virus infection" @default.
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• W3026779910 doi "https://doi.org/10.1101/2020.05.19.102954" @default.
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