FEATURES

FAMILY

DESCRIPTION

Also known as UBP15_HUMAN, USP15, KIAA0529. Hydrolase that removes conjugated ubiquitin from target proteins and regulates various pathways such as the TGF-beta receptor signaling, NF-kappa-B and RNF41/NRDP1-PRKN pathways (PubMed:21947082, PubMed:22344298, PubMed:24852371, PubMed:16005295, PubMed:17318178, PubMed:19826004, PubMed:19576224). Acts as a key regulator of TGF-beta receptor signaling pathway, but the precise mechanism is still unclear: according to a report, acts by promoting deubiquitination of monoubiquitinated R-SMADs (SMAD1, SMAD2 and/or SMAD3), thereby alleviating inhibition of R-SMADs and promoting activation of TGF-beta target genes (PubMed:21947082). According to another reports, regulates the TGF-beta receptor signaling pathway by mediating deubiquitination and stabilization of TGFBR1, leading to an enhanced TGF-beta signal (PubMed:22344298). Able to mediate deubiquitination of monoubiquitinated substrates as well as 'Lys-48'-linked polyubiquitin chains, protecting them against proteasomal degradation. May also regulate gene expression and/or DNA repair through the deubiquitination of histone H2B (PubMed:24526689). Acts as an inhibitor of mitophagy by counteracting the action of parkin (PRKN): hydrolyzes cleavage of 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains attached by parkin on target proteins such as MFN2, thereby reducing parkin's ability to drive mitophagy (PubMed:24852371). Acts as an associated component of COP9 signalosome complex (CSN) and regulates different pathways via this association: regulates NF-kappa-B by mediating deubiquitination of NFKBIA and deubiquitinates substrates bound to VCP (PubMed:16005295, PubMed:17318178, PubMed:19826004, PubMed:19576224). Involved in endosome organization by mediating deubiquitination of SQSTM1: ubiquitinated SQSTM1 forms a molecular bridge that restrains cognate vesicles in the perinuclear region and its deubiquitination releases target vesicles for fast transport into the cell periphery (PubMed:27368102)., (Microbial infection) Protects APC and human papillomavirus type 16 protein E6 against degradation via the ubiquitin proteasome pathway. A homodimer structure has been reported; however it is unclear whether the protein form a homodimer in vivo (PubMed:22001210). Identified in a complex with the COP9 signalosome complex (CSN) (PubMed:16005295). Interacts with SMAD1, SMAD2 and SMAD3; the interaction is direct (PubMed:21947082). Forms a complex with SMURF2 and SMAD7 (PubMed:22344298). Interacts with TGFBR1 (PubMed:22344298). Interacts with SART3; the interaction is direct (PubMed:24526689). May interact with RNF20 and RNF40 (PubMed:24526689). May interact with PRKN (PubMed:24852371). Interacts with INCA1 (PubMed:21750715).

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EXTERNAL LINKS

USP15

Ubiquitin carboxyl-terminal hydrolase 15

ligandability Mutations

USP15

Molecular Synopsis