FEATURES

FAMILY

DESCRIPTION

Also known as UBP13_HUMAN, USP13, ISOT3. Deubiquitinase that mediates deubiquitination of target proteins such as BECN1, MITF, SKP2 and USP10 and is involved in various processes such as autophagy and endoplasmic reticulum-associated degradation (ERAD). Component of a regulatory loop that controls autophagy and p53/TP53 levels: mediates deubiquitination of BECN1, a key regulator of autophagy, leading to stabilize the PIK3C3/VPS34-containing complexes. Also deubiquitinates USP10, an essential regulator of p53/TP53 stability. In turn, PIK3C3/VPS34-containing complexes regulate USP13 stability, suggesting the existence of a regulatory system by which PIK3C3/VPS34-containing complexes regulate p53/TP53 protein levels via USP10 and USP13. Recruited by nuclear UFD1 and mediates deubiquitination of SKP2, thereby regulating endoplasmic reticulum-associated degradation (ERAD). Also regulates ERAD through the deubiquitination of UBL4A a component of the BAG6/BAT3 complex. Mediates stabilization of SIAH2 independently of deubiquitinase activity: binds ubiquitinated SIAH2 and acts by impairing SIAH2 autoubiquitination. Has a weak deubiquitinase activity in vitro and preferentially cleaves 'Lys-63'-linked polyubiquitin chains. In contrast to USP5, it is not able to mediate unanchored polyubiquitin disassembly. Able to cleave ISG15 in vitro; however, additional experiments are required to confirm such data. Interacts with UFD1. Interacts (via UBA domains) with SIAH2 (when ubiquitinated). Interacts with BAG6; the interaction is direct and may mediate UBL4A deubiquitination (PubMed:24424410). Interacts (via UBA 2 domain) with AMFR; the interaction is direct (PubMed:24424410). Interacts with UBL4A; may be indirect via BAG6 (PubMed:24424410).

EXTERNAL LINKS

USP13

Ubiquitin carboxyl-terminal hydrolase 13

USP13

Molecular Synopsis