Histone deubiquitinating component of the transcription regulatory histone acetylation (HAT complex SAGA. Catalyzes the deubiquitination of both histones H2A and H2B, thereby acting as a coactivator. Recruited to specific gene promoters by activators such as MYC, where it is required for transcription. Required for nuclear receptor-mediated transactivation and cell cycle progression.,USP3L,Cell Biology & Developmental Biology,Epigenetics & Nuclear Signaling,Ubiquitin,USP22