Proteasome-associated deubiquitinase which releases ubiquitin from the proteasome targeted ubiquitinated proteins. Ensures the regeneration of ubiquitin at the proteasome. Is a reversibly associated subunit of the proteasome and a large fraction of proteasome-free protein exists within the cell. Required for the degradation of the chemokine receptor CXCR4 which is critical for CXCL12-induced cell chemotaxis. Serves also as a physiological inhibitor of endoplasmic reticulum-associated degradation (ERAD) under the non-stressed condition by inhibiting the degradation of unfolded endoplasmic reticulum proteins via interaction with ERN1. Indispensable for synaptic development and function at neuromuscular junctions (NMJs).
[1]tRNA-guanine transglycosylase cDNA from human placenta.Deshpande K.L., Katze J.R.Submitted (AUG-1995)[2]Cloning of human full-length CDSs in BD Creator(TM) system donor vector.Kalnine N., Chen X., Rolfs A., Halleck A., Hines L., Eisenstein S., Koundi
