BHR6A, hHR6A, HR6A, mHR6A, RAD6 homolog A, RAD6A, RAD6B, UBC-1, UBC2, UBC6, UBCD6, UBE2A, UBE2A_HUMAN, UBE2B, Ubiquitin carrier protein A, Ubiquitin carrier protein, Ubiquitin conjugating enzyme E2 17 kDa, Ubiquitin conjugating enzyme E2 21.5 kDa, Ubiquitin conjugating enzyme E2 A, Ubiquitin protein ligase A, Ubiquitin-conjugating enzyme E2 A, Ubiquitin-conjugating enzyme E2-17 kDa, Ubiquitin-conjugating enzyme E2-21.5 kDa, Ubiquitin-protein ligase A.
The ubiquitin (Ub) pathway involves three sequential enzymatic steps that facilitate the conjugation of Ub and Ub-like molecules to specific protein substrates. The first step requires the ATP-dependent activation of the Ub C-terminus and the assembly of multi-Ub chains by the Ub-activating enzyme known as the E1 component. The Ub chain is then conjugated to the Ub-conjugating enzyme (E2) to generate an intermediate Ub-E2 complex. The Ub-ligase (E3) then catalyzes the transfer of Ub from E2 to the appropriate protein substrate. UBE2A (Ubiquitin-conjugating enzyme E2 A) and UBE2B (Ubiquitin-conjugating enzyme E2 B) are both Ub-conjugating enzymes that are essential to postreplication repair of UV-damaged DNA. UBE2A and UBE2B are both nuclear and cell membrane proteins that have been found to interact with Rad18.
