Crystal structure of murine cyclooxygenase-2 complex with isoxicam

Structure

x-ray diffraction · 2 distinct chains · 47% helix, 9% strand (DSSP).

Ligands and binding sites

• HEM · Protoporphyrin IX containing Fe · ligand · 4 copies · chains A, B, C, D
• ICD · 4-hydroxy-2-methyl-N-(5-methyl-1,2-oxazol-3-yl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide · ligand · 4 copies · chains A, B, C, D
• NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 16 copies · chains A, B, C, D
• BOG · octyl beta-D-glucopyranoside · additive · 4 copies · chains B, C, D

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 15 with a druggability of 0.5 or more.

Interfaces

3 interfaces between chains.

• A–B · 2635 Ų buried · 51 hydrogen bonds · protein-protein
• C–D · 2625 Ų buried · 49 hydrogen bonds · protein-protein
• B–D · 434 Ų buried · 4 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 20 disulfide, 12 glycan (disulfide, N-glycosylation).

Compared structures

• 4M10 · Crystal Structure of Murine Cyclooxygenase-2 Complex with Isoxicam · the same entry in another collection · chain A against A, TM-score 1.00
• Q05769 · AlphaFold monomer V2.0 prediction for prostaglandin G/H synthase 2 (Q05769) · a predicted model of the same protein · chain A against A, TM-score 1.00

Analyse

• Open in the research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides and crosslinks on the 3D structure
• Every structure of UniProt Q05769
• Elsewhere: RCSB PDB 4M10 · PDBe 4M10 · UniProt Q05769