UBE3B

The modification of proteins with ubiquitin is an important cellular mechanism for targeting abnormal or short-lived proteins for degradation. Ubiquitination involves at least three classes of enzymes: E1 ubiquitin-activating enzymes, E2 ubiquitin-conjugating enzymes, and E3 ubiquitin-protein ligases. This gene encodes a member of the E3 ubiquitin-conjugating enzyme family which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme and transfers the ubiquitin to the targeted substrates. A HECT (homology to E6-AP C-terminus) domain in the C-terminus of the longer isoform of this protein is the catalytic site of ubiquitin transfer and forms a complex with E2 conjugases. Shorter isoforms of this protein which lack the C-terminal HECT domain are therefore unlikely to bind E2 enzymes. Alternatively spliced transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2012]

Description

Ubiquitin protein ligase E3B

Tissue specificity

Low tissue specificity

Subcell location

Nuclear speckles, Mitochondria

Predicted location

Intracellular

Protein family

Disease related genes
Enzymes
Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Metabolic proteins
Potential drug targets
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)

Chromosome

12 (109477402 - 109536705)

Ensembl ID

ENSG00000151148  (ver. 103.38)

Orthologs

Mouse Ube3b: ENSMUSG00000029577

UniProt

Q7Z3V4

neXtProt

NX_Q7Z3V4

Human splice variants
Mouse splice variants

Protein structure