UBE2G1: Proteins and Enzymes

Ubiquitin-conjugating Enzyme E2G 1 (UBE2G1) is a 170 amino acid (aa) member of the Ubiquitin-conjugating (E2) enzyme family with a predicted molecular weight of 19.5 kDa. The human protein shares 100% aa sequence identity with the mouse and rat orthologs. UBE2G1 has an E2 catalytic core domain with an active site cysteine residue that is required for the formation of a thioester bond with Ubiquitin. The expression level of UBE2G1 is downregulated when miR-199a is overexpressed, suggesting that UBE2G1 mRNA is targeted by miR-199a. UBE2G1 has been reported to function with the CRL4(Cdt2) Ubiquitin ligase (E3) to promote the poly-ubiquitination and degradation of Cdt1. Reduced expression of UBE2G1 in medulloblastoma tumors has also been reported, suggesting that it may act as a tumor suppressor.