CATH Classification

Domain Context

CATH Clusters

Superfamily Apoptosis, Tumor Necrosis Factor Receptor Associated Protein 2; Chain A
Functional Family TNF receptor-associated factor

Enzyme Information

2.3.2.27
RING-type E3 ubiquitin transferase.
based on mapping to UniProt Q13114
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.

UniProtKB Entries (1)

Q13114
TRAF3_HUMAN
Homo sapiens
TNF receptor-associated factor 3

PDB Structure

PDB 1KZZ
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Downstream regulator TANK binds to the CD40 recognition site on TRAF3.
Li, C., Ni, C.Z., Havert, M.L., Cabezas, E., He, J., Kaiser, D., Reed, J.C., Satterthwait, A.C., Cheng, G., Ely, K.R.
Structure