(E3-independent) E2 ubiquitin-conjugating enzyme EC#: 2.3.2.24; ChemWhat Code: 1377182

Product Name (E3-independent) E2 ubiquitin-conjugating enzyme
Example Structure Example Structure of (E3-independent) E2 ubiquitin-conjugating enzyme EC#: 2.3.2.24
Synonyms arsenite-sensitive E2, biquitin carrier protein D4, biquitin-conjugating enzyme E2 T, CDC34, CLF_100482, E2 ubiquitin-conjugating enzyme, E2230K, HIP2, N-terminus-conjugating E2, UB carrier protein (E2), Ubc1, Ubc3, UbcH10, UBE2A, UBE2B, UBE2C, UBE2D1, UBE2D2, UBE2D3, UBE2D4, UBE2E1, UBE2E2, UBE2E3, UBE2G1, UBE2G2, UBE2H, UBE2K, UBE2L3, UBE2N, UBE2Q2, UBE2R1, UBE2R2, UBE2S, UBE2T, UBE2V1, UBE2V2, UBE2W, ubiquitin carrier protein A, ubiquitin carrier protein B, ubiquitin carrier protein C, ubiquitin carrier protein D1, ubiquitin carrier protein D2, ubiquitin carrier protein D3, Ubiquitin carrier protein E1, ubiquitin carrier protein E2, ubiquitin carrier protein E3, Ubiquitin carrier protein G1, Ubiquitin carrier protein G2, ubiquitin carrier protein H, Ubiquitin carrier protein L3, ubiquitin carrier protein N, Ubiquitin carrier protein Q2, ubiquitin carrier protein R2, ubiquitin carrier protein S, ubiquitin carrier protein T, ubiquitin carrier protein W, ubiquitin-conjugating enzyme E2 A, ubiquitin-conjugating enzyme E2 B, ubiquitin-conjugating enzyme E2 C, ubiquitin-conjugating enzyme E2 D1, ubiquitin-conjugating enzyme E2 D2, ubiquitin-conjugating enzyme E2 D3, ubiquitin-conjugating enzyme E2 D4, ubiquitin-conjugating enzyme E2 E1, ubiquitin-conjugating enzyme E2 E2, ubiquitin-conjugating enzyme E2 E3, ubiquitin-conjugating enzyme E2 G1, ubiquitin-conjugating enzyme E2 G2, ubiquitin-conjugating enzyme E2 H, ubiquitin-conjugating enzyme E2 K, ubiquitin-conjugating enzyme E2 L3, ubiquitin-conjugating enzyme E2 N, Ubiquitin-conjugating enzyme E2 Q2, ubiquitin-conjugating enzyme E2 R1, ubiquitin-conjugating enzyme E2 R2, ubiquitin-conjugating enzyme E2 S, ubiquitin-conjugating enzyme E2 variant 1, ubiquitin-conjugating enzyme E2 variant 2, ubiquitin-conjugating enzyme E2 W, ubiquitin-conjugating enzyme E2-25 kDa, ubiquitin-conjugating enzyme E2-CDC34
EC Number 2.3.2.24
CAS Registry Number
Comments The enzyme transfers a single ubiquitin directly from an ubiquitinated E1 ubiquitin-activating enzyme to itself, and on to a lysine residue of the acceptor protein without involvement of E3 ubiquitin transferases (cf. EC 2.3.2.26, EC 2.3.2.27). It forms a labile ubiquitin adduct in the presence of E1, ubiquitin, and Mg2+-ATP and catalyses the conjugation of ubiquitin to protein substrates, independently of E3. This transfer has only been observed with small proteins. In vitro a transfer to small acceptors (e.g. L-lysine, N-acetyl-L-lysine methyl ester) has been observed [1].
Cofactor
History
Reactions S-ubiquitinyl-[E1 ubiquitin-activating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E1 ubiquitin-activating enzyme]-L-cysteine + N(6)- monoubiquitinyl-[acceptor protein]-L-lysine.

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