UBE2D3

UBE2D3, also known as E2-25k or UBC4/5 homolog D, is a human gene that encodes a ubiquitin-conjugating enzyme. This enzyme belongs to the E2 ubiquitin-conjugating enzyme family, which plays a crucial role in the ubiquitination process. Ubiquitination is a post-translational modification where ubiquitin, a small regulatory protein, is attached to a substrate protein. This process is essential for various cellular functions, including protein degradation, DNA repair, and signal transduction.

UBE2D3 specifically functions as an E2 conjugase, working in conjunction with E3 ubiquitin ligases. E3 ligases are responsible for substrate specificity, while E2 enzymes like UBE2D3 are responsible for forming the isopeptide bond between the C-terminus of ubiquitin and a lysine residue on the target protein. UBE2D3 has been implicated in the degradation of various proteins involved in cell cycle progression and DNA damage response.

Mutations or dysregulation of UBE2D3 have been associated with certain human diseases, although research is ongoing. Its involvement in fundamental cellular pathways suggests a broad impact on cellular health and disease. The precise mechanisms and the full spectrum of proteins regulated by UBE2D3 are areas of active investigation in molecular biology and biochemistry.