May negatively regulate the ATPase activity of VCP, an ATP-driven segregase that associates with different cofactors to control a wide variety of cellular processes . As a cofactor of VCP, it may play a role in the transport of CAV1 to lysosomes for degradation . It may also play a role in endoplasmic reticulum-associated degradation (ERAD) of misfolded proteins . Together with VCP and other cofactors, it may play a role in macroautophagy, regulating for instance the clearance of damaged lysosomes .
Cytoplasm . Cytoplasm, cytosol . Membrane ; Peripheral membrane protein . Nucleus . Cytoplasm, cytoskeleton, microtubule organizing center, centrosome . Early endosome membrane ; Peripheral membrane protein . Late endosome membrane ; Peripheral membrane protein . Lysosome membrane ; Peripheral membrane protein . Localizes at the centrosome both in interphase and during mitosis (PubMed:18656546). May be recruited to endosomal and lysosomal membranes as part of a ternary complex with CAV1 and VCP (PubMed:21822278). Recruited to damaged lysosomes decorated with K48-linked ubiquitin chains (PubMed:27753622). .
Enhanced expression in testis.
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