(A) Wall-eyed
stereo view of AA bound in the cyclooxygenase active
site of COX-1 and the side chains that make up the proximal binding
pocket (green), the central binding pocket (magenta), and the distal
binding pocket (cyan). This view is similar to that used to depict
most structures of fatty acids in complex with COX-1 or COX-2 throughout
the review. (B) Wall-eyed stereo view of an overlay of the structures
of four fatty acids in the active site of COX-1. Fatty acids and amino
acid side chains are colored from lightest to darkest in the order
of LA, DHLA, EPA, and AA. Notable is the minimal movement of active
site residues to accommodate the structural differences among the
various fatty acids. Monoscopic views of the individual structures
are provided in Figure S1. From PDB 1DIY (A and B) and 1IGZ, 1FE2, and 1IGX (B only).