Scientific Background: UBE2K also known as UBC1 or ubiquitin-conjugating enzyme E2K belongs to the ubiquitin-conjugating enzyme family which interacts with RING finger proteins. UBE2K can ubiquitinate huntingtin, the gene product for Huntington's disease. Huntingtin is ubiquitinated in peripheral cells, suggesting a role for UBE2K in the degradation of huntingtin (1). UBE2K plays a role in aggregate formation of expanded polyglutamine proteins and the suppression of apoptosis in polyglutamine diseases (2). UBE2K also plays a role in the dislocation of newly synthesized MHC class I heavy chains from the endoplasmic reticulum, and involvement in foam cell formation.
2. De Pril, R. et al: Ubiquitin-conjugating enzyme E2-25K increases aggregate formation and cell death in polyglutamine diseases. Mol Cell Neurosci. 2007 Jan;34(1):10-9.
NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene belongs to the ubiquitin-conjugating enzyme family. This protein interacts with RING finger proteins, and it can ubiquitinate huntingtin, the gene product for Huntington's disease. Known functions for this protein include a role in aggregate formation of expanded polyglutamine proteins and the suppression of apoptosis in polyglutamine diseases, a role in the dislocation of newly synthesized MHC class I heavy chains from the endoplasmic reticulum, and involvement in foam cell formation. Multiple transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]
Uniprot Description
Function: Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. In vitro, in the presence or in the absence of BRCA1-BARD1 E3 ubiquitin-protein ligase complex, catalyzes the synthesis of 'Lys-48'-linked polyubiquitin chains. Does not transfer ubiquitin directly to but elongates monoubiquitinated substrate protein. Mediates the selective degradation of short-lived and abnormal proteins, such as the endoplasmic reticulum-associated degradation (ERAD) of misfolded lumenal proteins. Ubiquitinates huntingtin. May mediate foam cell formation by the suppression of apoptosis of lipid-bearing macrophages through ubiquitination and subsequence degradation of p53/TP53. Proposed to be involved in ubiquitination and proteolytic processing of NF-kappa-B; in vitro supports ubiquitination of NFKB1. In case of infection by cytomegaloviruses may be involved in the US11-dependent degradation of MHC class I heavy chains following their export from the ER to the cytosol. In case of viral infections may be involved in the HPV E7 protein-dependent degradation of RB1. Ref.1 Ref.2 Ref.3 Ref.9 Ref.12 Ref.13 Ref.15 Ref.16
Catalytic activity: ATP + ubiquitin + protein lysine = AMP + diphosphate + protein N-ubiquityllysine.
Pathway: Protein modification; protein ubiquitination.
Subunit structure: Interacts with RNF138/NARF. Interacts with BRCA1. Ref.9 Ref.13
Subcellular location: Cytoplasm
By similarity.
Tissue specificity: Expressed in all tissues tested, including spleen, thymus, prostate, testis, ovary, small intestine, colon, peripheral blood leukocytes, T-lymphocytes, monocytes, granulocytes and bone marrow mononuclear cells. Highly expressed in brain, with highest levels found in cortex and striatum and at lower levels in cerebellum and brainstem. Ref.1 Ref.2 Ref.3
Induction: By aggregated low-density lipoprotein. Ref.2 Ref.3
Post-translational modification: Sumoylation at Lys-14 impairs catalytic activity
By similarity.
Sequence similarities: Belongs to the ubiquitin-conjugating enzyme family.Contains 1 UBA domain.
Research Articles on UBE2K (UBC1)
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Product Notes
The UBE2K (UBC1) ube2k (Catalog #AAA515093) is a Recombinant Protein produced from E Coli and is intended for research purposes only. The product is available for immediate purchase. The tag for this protein is His tag!!Expression System||E.coli!!Source Note||Recombinant full length human UBE2K (UBC1) was expressed in E. coli cells. AAA Biotech's UBE2K (UBC1) can be used in a range of immunoassay formats including, but not limited to, Western Blot (WB). Researchers should empirically determine the suitability of the UBE2K (UBC1) ube2k for an application not listed in the data sheet. Researchers commonly develop new applications and it is an integral, important part of the investigative research process. It is sometimes possible for the material contained within the vial of "UBE2K (UBC1), Recombinant Protein" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
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