O GlcNAc transferase (OGT) is an essential mammalian enzyme that glycosylates proteins with O-linked β-N-acetylglucosamine (O-GlcNAc), and this regulates a variety of cellular signalling pathways. Here, the crystal structure of human OGT as a binary complex with UDP and a ternary complex with UDP and a peptide substrate is presented. The structures show how OGT recognizes peptide sequences and provide information on the enzymatic mechanism.
- Michael B. Lazarus
- Yunsun Nam
- Suzanne Walker
