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USP8 Hydrolase that can remove conjugated ubiquitin from proteins and therefore plays an important regulatory role at the level of protein turnover by preventing degradation. Converts both 'Lys-48' an 'Lys-63'-linked ubiquitin chains. Catalytic activity is enhanced in the M phase. Involved in cell proliferation. Required to enter into S phase in response to serum stimulation. May regulate T-cell anergy mediated by RNF128 via the formation of a complex containing RNF128 and OTUB1. Probably regulates the stability of STAM2 and RASGRF1. Regulates endosomal ubiquitin dynamics, cargo sorting, membrane traffic at early endosomes, and maintenance of ESCRT-0 stability. The level of protein ubiquitination on endosomes is essential for maintaining the morphology of the organelle. Deubiquitinates EPS15 and controles tyrosine kinase stability. Removes conjugated ubiquitin from EGFR thus regulating EGFR degradation and downstream MAPK signaling. Involved in acrosome biogenesis through interaction with the spermatid ESCRT-0 complex and microtubules. Deubiquitinates BIRC6/bruce and KIF23/MKLP1. Forms a ternary complex with RNF128 and OTUB1. Interacts (via C-terminal UCH catalytic domain) with OTUB1 isoform 1. Interacts with STAM2 (via SH3 domain). Interacts with DNAJB3, EGFR, EPS15, RASGRF1, RNF41, YWHAE, YWHAG and YWHAZ. Interacts with NBR1, RASGRF1, RNF41 and IST1. Associates with the ESCRT-0 complex and with microtubules. Interacts with BIRC6/bruce and KIF23/MKLP1. Upon growth stimulation in starved human fibroblasts. Decreases in response to growth arrest induced by cell-cell contact. Belongs to the peptidase C19 family. Note: This description may include information from UniProtKB.
Protein type: EC; Protease; Ubiquitin conjugating system; Ubiquitin-specific protease
Chromosomal Location of Human Ortholog: 15q21.2
Cellular Component: cytoplasm; cytosol; dendritic spine; early endosome; extrinsic component of plasma membrane; midbody; nucleus; postsynaptic density
Molecular Function: cadherin binding; cysteine-type endopeptidase activity; protein binding; SH3 domain binding; thiol-dependent ubiquitin-specific protease activity
Biological Process: cell proliferation; cellular response to dexamethasone stimulus; endosome organization and biogenesis; mitotic cytokinesis; positive regulation of canonical Wnt signaling pathway; protein deubiquitination; protein K48-linked deubiquitination; ubiquitin-dependent protein catabolic process
Disease: Pituitary Adenoma, Acth-secreting
Reference #:  P40818 (UniProtKB)
Alt. Names/Synonyms: Deubiquitinating enzyme 8; FLJ34456; hUBPy; HumORF8; KIAA0055; MGC129718; Ubiquitin carboxyl-terminal hydrolase 8; Ubiquitin isopeptidase Y; ubiquitin specific peptidase 8; ubiquitin specific protease 8; Ubiquitin thioesterase 8; Ubiquitin-specific-processing protease 8; UBP8; UBPY; USP8
Gene Symbols: USP8
Molecular weight: 127,523 Da
Basal Isoelectric point: 8.7  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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