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CATH Classification

Domain Context

CATH Clusters

Superfamily DNA helicase RuvA subunit, C-terminal domain
Functional Family Ubiquitin conjugating enzyme E2 K

Enzyme Information

2.3.2.23
E2 ubiquitin-conjugating enzyme.
based on mapping to UniProt P61086
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 (1)

P0CG47
UBB_HUMAN
Homo sapiens
Polyubiquitin-B

PDB Structure

PDB 5DFL
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
The molecular basis of lysine 48 ubiquitin chain synthesis by Ube2K.
Middleton, A.J., Day, C.L.
Sci Rep
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