3.4.22.B50 FTKLAGGKISFS + H2O - 3.4.22.B50 additional information the enzyme is one of three distinct viral proteases (PLP1, PLP2 and 3CLpro) involved in processing of the replicase polyprotein 3.4.22.B50 polyubiquitin + H2O the enzyme cleaves Lys48- and Lys63-linked polyubiquitin to monoubiquitin but not linear polyubiquitin 3.4.22.B50 replicase polyprotein + H2O PLP2 cleaves a substrate encoding the first predicted membrane-spanning domain, MP1, of the replicase polyprotein. Processing the replicase polyprotein at this site generates the p150 replicase intermediate that is likely critical for embedding the replicase complex into cellular membranes. The enzyme acts efficiently in trans 3.4.22.B50 ubiquitin + H2O - 3.4.22.B50 ubiquitin + H2O the enzyme cleaves the LRGG tail of ubiquitin 3.4.22.B50 ubiquitin + H2O the enzyme processes both K-48 and K-63 linked polyubiquitin chains 3.4.22.B50 ubiquitinated RIG-I + H2O - 3.4.22.B50 ubiquitinated STING + H2O - 3.4.22.B50 VAKQGAGFKRTY + H2O -