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Barber, Claire; Netherton, Chris; Goatley, Lynnette; Moon, Alice; Goodbourn, Steve; Dixon, Linda (2017)
Publisher: Academic Press
Journal: Virology
Languages: English
Types: Article
Subjects: EIF2α, Protein translation, Unfolded protein response, African swine fever virus, Virology, CHOP, Article

Classified by OpenAIRE into

mesheuropmc: biological phenomena, cell phenomena, and immunity, macromolecular substances
The African swine fever virus DP71L protein recruits protein phosphatase 1 (PP1) to dephosphorylate the translation initiation factor 2α (eIF2α) and avoid shut-off of global protein synthesis and downstream activation of the pro-apoptotic factor CHOP. Residues V16 and F18A were critical for binding of DP71L to PP1. Mutation of this PP1 binding motif or deletion of residues between 52 and 66 reduced the ability of DP71L to cause dephosphorylation of eIF2α and inhibit CHOP induction. The residues LSAVL, between 57 and 61, were also required. PP1 was co-precipitated with wild type DP71L and the mutant lacking residues 52- 66 or the LSAVL motif, but not with the PP1 binding motif mutant. The residues in the LSAVL motif play a critical role in DP71L function but do not interfere with binding to PP1. Instead we propose these residues are important for DP71L binding to eIF2α.

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