Deubiquitinase that can remove conjugated ubiquitin from target proteins, such as RAB7A and LAMTOR1 . Acts as a positive regulator of the mTORC1 signaling by mediating deubiquitination of LAMTOR1, thereby promoting the association between LAMTOR1 and the lysosomal V-ATPase complex and subsequent activation of the mTORC1 complex .
Subcellular locations: Golgi apparatus membrane