CATH Classification

Domain Context

CATH Clusters

Superfamily Ubiquitin Conjugating Enzyme
Functional Family Ubiquitin-conjugating enzyme E2 N

Enzyme Information

2.3.2.23
E2 ubiquitin-conjugating enzyme.
based on mapping to UniProt P61088
S-ubiquitinyl-[E1 ubiquitin-activating enzyme]-L-cysteine + [E2 ubiquitin-conjugating enzyme]-L-cysteine = [E1 ubiquitin-activating enzyme]-L-cysteine + S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L- cysteine.
-!- The E2 ubiquitin-conjugating enzyme acquires the activated ubquitin from the E1 ubiquitin-activating enzyme (EC 6.2.1.45) and binds it via a transthioesterification reaction to itself. -!- In the human enzyme the catalytic center is located at Cys-87 where ubiquitin is bound via its C-terminal glycine in a thioester linkage. -!- Formerly EC 6.3.2.19.

UniProtKB Entries (2)

O88846
RNF4_RAT
Rattus norvegicus
E3 ubiquitin-protein ligase RNF4
P0CG48
UBC_HUMAN
Homo sapiens
Polyubiquitin-C

PDB Structure

PDB 5AIU
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Structural Basis for the Ring Catalyzed Synthesis of K63 Linked Ubiquitin Chains
Branigan, E., Plechanovova, A., Jaffray, E., Naismith, J.H., Hay, R.T.
Nat.Struct.Mol.Biol.