CATH Classification
Level | CATH Code | Description |
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1 | Mainly Alpha |
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1.10 | Orthogonal Bundle |
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1.10.1170 | Inhibitor Of Apoptosis Protein (2mihbC-IAP-1); Chain A |
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1.10.1170.10 | Inhibitor Of Apoptosis Protein (2mihbC-IAP-1); Chain A |
Domain Context
CATH Clusters
Superfamily | Inhibitor Of Apoptosis Protein (2mihbC-IAP-1); Chain A |
Functional Family | Putative e3 ubiquitin-protein ligase xiap |
Enzyme Information
2.3.2.27 |
RING-type E3 ubiquitin transferase.
based on mapping to UniProt P98170
S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)- ubiquitinyl-[acceptor protein]-L-lysine.
-!- RING E3 ubiquitin transferases serve as mediators bringing the ubiquitin-charged E2 ubiquitin-conjugating enzyme (EC 2.3.2.23) and an acceptor protein together to enable the direct transfer of ubiquitin through the formation of an isopeptide bond between the C-terminal glycine residue of ubiquitin and the epsilon-amino group of an L-lysine residue of the acceptor protein. -!- Unlike EC 2.3.2.26 the RING-E3 domain does not form a catalytic thioester intermediate with ubiquitin. -!- Many members of the RING-type E3 ubiquitin transferase family are not able to bind a substrate directly, and form a complex with a cullin scaffold protein and a substrate recognition module (the complexes are named CRL for Cullin-RING-Ligase). -!- In these complexes, the RING-type E3 ubiquitin transferase provides an additional function, mediating the transfer of a NEDD8 protein from a dedicated E2 carrier to the cullin protein (see EC 2.3.2.32). -!- Cf. EC 2.3.2.31.
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UniProtKB Entries (1)
P98170 |
XIAP_HUMAN
Homo sapiens
E3 ubiquitin-protein ligase XIAP
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PDB Structure
PDB | 4J47 |
External Links | |
Method | X-RAY DIFFRACTION |
Organism | |
Primary Citation |
The structure of XIAP BIR2: understanding the selectivity of the BIR domains.
Acta Crystallogr.,Sect.D
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