2.3.2.B12: ubiquitin transferase U-box E4
This is an abbreviated version!
For detailed information about ubiquitin transferase U-box E4, go to the full flat file.
Reaction
Synonyms
CHIP, CYC4, DUF1076 domain-containing protein, E4, E4 factor, E4 ligase, E4 ubiquitin ligase, E4 ubiquitin-protein ligase UFD2, MUSE3, PRP19, StoD, STY1076, Ub-conjugating E4 factor, Ube4A, UBE4B, ubiquitin chain elongation enzyme Ufd2, ubiquitin conjugation factor E4, ubiquitin fusion degradation protein 2, Ubr1-dependent E4 enzyme, UFD-2, Ufd2, Ufd2a, Ufd2b, Ufd4, Ufd4-enhancing ubiquitiylation enzyme
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Reaction
Reaction on EC 2.3.2.B12 - ubiquitin transferase U-box E4
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S-ubiquitinyl-[U-box-E4-ubiquitin-carrier protein]-L-cysteine + N6-ubiquitinyl-[acceptor protein]-L-lysine = [U-box-E4-ubiquitin-carrier protein]-L-cysteine + N6-(N6-ubiquitinyl-L-lysyl)-ubiquitinyl-[acceptor protein]-L-lysine
S-ubiquitinyl-[U-box-E4-ubiquitin-carrier protein]-L-cysteine + N6-ubiquitinyl-[acceptor protein]-L-lysine = [U-box-E4-ubiquitin-carrier protein]-L-cysteine + N6-[N6-ubiquitinyl-L-lysyl]-ubiquitinyl-[acceptor protein]-L-lysine
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S-ubiquitinyl-[U-box-E4-ubiquitin-carrier protein]-L-cysteine + N6-ubiquitinyl-[acceptor protein]-L-lysine = [U-box-E4-ubiquitin-carrier protein]-L-cysteine + N6-(N6-ubiquitinyl-L-lysyl)-ubiquitinyl-[acceptor protein]-L-lysine
E4 used to describe an E3 when it enhances ubiquitin chain elongation and potentialy also forms additional chains
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