2.3.2.B8: E2:E3 ubiquitin transferase
This is an abbreviated version!
For detailed information about E2:E3 ubiquitin transferase, go to the full flat file.
Reaction
Synonyms
E2-E3 ligase, E3 HECT, E3 ubiquitin-protein ligase, E3 ubiquitin-protein ligase Itchy homolog, Itch, UbcH5, UbcH5B-ubiquitin-HECT NEDD4L complex, UbcH6, UbcM3, UBE2D1, UBE2E1
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Substrates Products
Substrates Products on EC 2.3.2.B8 - E2:E3 ubiquitin transferase
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REACTION DIAGRAM
S-ubiquitinyl-[ubiquitin-carrier protein E2]-L-cysteine + [HECT-E3-ubiquitin-carrier protein cIAP2]-L-cysteine
[ubiquitin-carrier protein E2]-L-cysteine + S-ubiquitinyl-[HECT-E3-ubiquitin-carrier protein cIAP2]-L-cysteine
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S-ubiquitinyl-[ubiquitin-carrier protein E2]-L-cysteine + [HECT-E3-ubiquitin-carrier protein]-L-cysteine
[ubiquitin-carrier protein E2]-L-cysteine + S-ubiquitinyl-[HECT-E3-ubiquitin-carrier protein]-L-cysteine
[ubiquitin-carrier protein UbcH5]-S-ubiquitinyl-L-cysteine + [HECT-E3-ubiquitin-carrier protein E6-AP]-L-cysteine
[ubiquitin-carrier protein UbcH5]-L-cysteine + [HECT-E3-ubiquitin-carrier protein E6-AP]-S-ubiquitinyl-L-cysteine
a region of isoform UbcH5 encompassing the catalytic site cysteine residue is critical for its ability to interact with E3 enzymes E6-AP and RSP5. Of particular importance is a phenylalanine residue at position 62 of UbcH5 that is conserved among the members of the UBC4/UBC5 subfamily but is not present in any of the other known E2s
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[ubiquitin-carrier protein UbcH5]-S-ubiquitinyl-L-cysteine + [HECT-E3-ubiquitin-carrier protein Rsp5]-L-cysteine
[ubiquitin-carrier protein UbcH5]-L-cysteine + [HECT-E3-ubiquitin-carrier protein Rsp5]-S-ubiquitinyl-L-cysteine
a region of isoform UbcH5 encompassing the catalytic site cysteine residue is critical for its ability to interact with E3 enzymes E6-AP and RSP5. Of particular importance is a phenylalanine residue at position 62 of UbcH5 that is conserved among the members of the UBC4/UBC5 subfamily but is not present in any of the other known E2s
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S-ubiquitinyl-[ubiquitin-carrier protein E2]-L-cysteine + [HECT-E3-ubiquitin-carrier protein]-L-cysteine
[ubiquitin-carrier protein E2]-L-cysteine + S-ubiquitinyl-[HECT-E3-ubiquitin-carrier protein]-L-cysteine
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S-ubiquitinyl-[ubiquitin-carrier protein E2]-L-cysteine + [HECT-E3-ubiquitin-carrier protein]-L-cysteine
[ubiquitin-carrier protein E2]-L-cysteine + S-ubiquitinyl-[HECT-E3-ubiquitin-carrier protein]-L-cysteine
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the full-length UBE2E proteins primarily promote protein monoubiquitylation, whereas the core UBC domain of each can efficiently build polyubiquitin chains
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additional information
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the N-terminal extension of Ube2E1 undergoes intramolecular auto-ubiquitination. This self-ubiquitination activity is enhanced in the presence of interacting RING E3 ligases like RNF4 and results in a progressive attenuation of the E2 activity toward substrate/E3 modification
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additional information
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the enzyme is autoinhibited by an intramolecular interaction between its HECT (homologous to the E6-AP carboxy terminus domain) and two central WW domains. Ndfip1 binds these WW domains to release the HECT, allowing trans-thiolation and enzyme catalytic activity
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