CATH Classification

Domain Context

CATH Clusters

Superfamily 2.20.70.10
Functional Family

Enzyme Information

2.3.2.26
HECT-type E3 ubiquitin transferase.
based on mapping to UniProt Q96J02
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)

Q96J02
ITCH_HUMAN
Homo sapiens
E3 ubiquitin-protein ligase Itchy homolog

PDB Structure

PDB 2DMV
External Links
Method SOLUTION NMR
Organism
Primary Citation
Solution structure of the second ww domain of Itchy homolog E3 ubiquitin protein ligase (Itch)
Ohnishi, S., Paakkonen, K., Tochio, N., Tomizawa, T., Koshiba, S., Inoue, M., Guntert, P., Kigawa, T., Yokoyama, S.
To be Published
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