id author title date pages extension mime words sentences flesch summary cache txt cord-353337-o302vxqm Visser, Linda J. Dissecting distinct proteolytic activities of FMDV L(pro) implicates cleavage and degradation of RLR signaling proteins, not its deISGylase/DUB activity, in type I interferon suppression 2020-07-15 .txt text/plain 9547 514 54 To study the effects of L pro on the induction of type I IFN in picornavirus-infected cells, we used two previously generated recombinant viruses; EMCV-L Zn , which contains inactivating mutations in the zinc-finger domain of the Leader (i.e. EMCV's RLR signaling antagonist) [1, 43, 44] , and EMCV-L pro , which was derived from EMCV-L Zn and additionally encodes FMDV L pro at the N-terminus of its polyprotein ( Fig 1A) [45]. Cleavage of RLR signaling proteins by FMDV L pro correlates with type I IFN suppression degradation of NF-κB p65 and DUB activity as well as to impair L pro 's ability to reduce IFN-β mRNA expression [36, 39] , also affected L pro 's ability to cleave MAVS and TBK1. Notably, infection with EMCV L pro L143A, which displayed wt deISGylase/DUB activity but is strongly impaired in its ability to cleave/degrade RLR signaling proteins MAVS, TBK1 and NFκB p65, failed to suppress the induction of IFN-β mRNA. ./cache/cord-353337-o302vxqm.txt ./txt/cord-353337-o302vxqm.txt