CATH Classification

Domain Context

CATH Clusters

Superfamily SWIB/MDM2 domain
Functional Family

Enzyme Information

2.3.2.27
RING-type E3 ubiquitin transferase.
based on mapping to UniProt Q00987
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)

Q00987
MDM2_HUMAN
Homo sapiens
E3 ubiquitin-protein ligase Mdm2

PDB Structure

PDB 4ZYI
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Discovery of a Dihydroisoquinolinone Derivative (NVP-CGM097): A Highly Potent and Selective MDM2 Inhibitor Undergoing Phase 1 Clinical Trials in p53wt Tumors.
Holzer, P., Masuya, K., Furet, P., Kallen, J., Valat-Stachyra, T., Ferretti, S., Berghausen, J., Bouisset-Leonard, M., Buschmann, N., Pissot-Soldermann, C., Rynn, C., Ruetz, S., Stutz, S., Chene, P., Jeay, S., Gessier, F.
J.Med.Chem.