CATH Classification

Domain Context

CATH Clusters

Superfamily 2.20.70.10
Functional Family E3 ubiquitin-protein ligase

Enzyme Information

2.3.2.26
HECT-type E3 ubiquitin transferase.
based on mapping to UniProt Q9HAU4
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.
-!- In the first step the enzyme transfers ubiquitin from the E2 ubiquitin-conjugating enzyme (EC 2.3.2.23) to a cysteine residue in its HECT domain (which is located in the C-terminal region), forming a thioester bond. -!- In a subsequent step the enzyme transfers the ubiquitin to an acceptor protein, resulting in 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. -!- Cf. EC 2.3.2.27 and EC 2.3.2.31.

UniProtKB Entries (1)

O15105
SMAD7_HUMAN
Homo sapiens
Mothers against decapentaplegic homolog 7

PDB Structure

PDB 2DJY
External Links
Method SOLUTION NMR
Organism Escherichia
Primary Citation
An Expanded WW Domain Recognition Motif Revealed by the Interaction between Smad7 and the E3 Ubiquitin Ligase Smurf2.
Chong, P.A., Lin, H., Wrana, J.L., Forman-Kay, J.D.
J.Biol.Chem.