7kxc
The aminoacrylate form of the wild-type salmonella typhimurium tryptophan synthase in complex with inhibitor n-(4'-trifluoromethoxybenzenesulfonyl)-2-amino-1-ethylphosphate (f9f) at the enzyme alpha-site, sodium ion at the metal coordination site and benzimidazole (bzi) at the enzyme beta-site at 1.30 angstrom resolution. one of the beta-q114 rotamer conformations allows a hydrogen bond to form with the plp oxygen at the position 3 in the ring
