Fig. 3: Interactions between PsChs1 and ligands.
a, Sliced-surface view (right) of the UDP-GlcNAc-binding site (right) and detailed interactions between UDP-GlcNAc and PsChs1 (left). The residues involved in interactions are labelled and shown as sticks. The hydrogen bonds are labelled as black dashed lines. The interaction between the manganese ion and the ligand is labelled with red dashed lines. The density of the ligand is shown as a grey mesh. b, Superimposition of the structures of apo-PsChs1 (light grey), UDP-GlcNAc-bound PsChs1 (yellow) and UDP/(GlcNAc)3-bound PsChs1 (pink) revealed conformational changes in the swinging loop and catalytic residues. c, Sliced-surface view of the two channels of PsChs1 in the UDP/(GlcNAc)3-bound state (middle). The density of UDP/(GlcNAc)3 (left) and detailed interactions with PsChs1 (right) are also shown. The hydrogen bonds are labelled as black dashed lines. d, Sliced-surface view (right) of the UDP-binding site and detailed interactions between UDP and PsChs1 (left). The hydrogen bonds are labelled as black dashed lines. e, Superimposition of the structures of UDP/(GlcNAc)3-bound PsChs1 (pink) and UDP-bound PsChs1 (cyan).
