UBE2W (UBC16) Recombinant Protein

This gene encodes a nuclear-localized ubiquitin-conjugating enzyme (E2) that, along with ubiquitin-activating (E1) and ligating (E3) enzymes, coordinates the addition of a ubiquitin moiety to existing proteins. The encoded protein promotes the ubiquitination of Fanconi anemia complementation group proteins and may be important in the repair of DNA damage. There is a pseudogene for this gene on chromosome 1. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2012]

Function: Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. Catalyzes monoubiquitination. Involved in degradation of misfolded chaperone substrates by mediating monoubiquitination of STUB1/CHIP, leading to recruitment of ATXN3 to monoubiquitinated STUB1/CHIP, and restriction of the length of ubiquitin chain attached to STUB1/CHIP substrates by ATXN3. After UV irradiation, but not after mitomycin-C (MMC) treatment, acts as a specific E2 ubiquitin-conjugating enzyme for the Fanconi anemia complex by associating with E3 ubiquitin-protein ligase FANCL and catalyzing monoubiquitination of FANCD2, a key step in the DNA damage pathway. In vitro catalyzes 'Lys-11'-linked polyubiquitination. Ref.7 Ref.8 Ref.9

Catalytic activity: ATP + ubiquitin + protein lysine = AMP + diphosphate + protein N-ubiquityllysine.

Pathway: Protein modification; protein ubiquitination.

Subunit structure: Homodimer. Interacts with FANCL. Interacts with STUB1/CHIP

By similarity. Ref.7 Ref.10

Subcellular location: Nucleus. Note: In the nucleus, colocalizes with FANCL. Ref.1

Tissue specificity: Widely expressed, with highest expression in brain, liver, pancreas and heart. Ref.1

Post-translational modification: Ubiquitinated in vitro in the presence of FANCL

By similarity.

Sequence similarities: Belongs to the ubiquitin-conjugating enzyme family.