CATH Classification

Domain Context

CATH Clusters

Superfamily Tetratricopeptide repeat domain
Functional Family UDP-N-acetylglucosamine--peptide N-acetylglucosaminyltransferase 110 kDa subunit

Enzyme Information

2.4.1.255
Protein O-GlcNAc transferase.
based on mapping to UniProt O15294
(1) UDP-N-acetyl-alpha-D-glucosamine + [protein]-L-serine = UDP + [protein]-3-O-(N-acetyl-beta-D-glucosaminyl)-L-serine. (2) UDP-N-acetyl-alpha-D-glucosamine + [protein]-L-threonine = UDP + [protein]-3-O-(N-acetyl-beta-D-glucosaminyl)-L-threonine.
-!- Within higher eukaryotes post-translational modification of protein serines/threonines with N-acetylglucosamine (O-GlcNAc) is dynamic, inducible and abundant, regulating many cellular processes by interfering with protein phosphorylation. -!- EC 2.4.1.255 transfers GlcNAc onto substrate proteins and EC 3.2.1.169 cleaves GlcNAc from the modified proteins.

UniProtKB Entries (1)

P68400
CSK21_HUMAN
Homo sapiens
Casein kinase II subunit alpha

PDB Structure

PDB 3TAX
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
A neutral diphosphate mimic crosslinks the active site of human O-GlcNAc transferase.
Jiang, J., Lazarus, M.B., Pasquina, L., Sliz, P., Walker, S.
Nat.Chem.Biol.