The function of ENSG00000116750 (UCHL5, ubiquitin C-terminal hydrolase L5) is as follows. Protease that specifically cleaves 'Lys-48'-linked polyubiquitin chains. Deubiquitinating enzyme associated with the 19S regulatory subunit of the 26S proteasome. Putative regulatory component of the INO80 complex; however is inactive in the INO80 complex and is activated by a transient interaction of the INO80 complex with the proteasome via ADRM1. {ECO:0000269|PubMed:16906146, ECO:0000269|PubMed:18922472}.