7jmq
The external aldimine form of the mutant beta-s377a salmonella thypi tryptophan synthase in open conformation showing dual side chain conformations for the residue beta-q114, sodium ion at the metal coordination site, and f9 inhibitor at the alpha-site. one of the beta-q114 rotamer conformations allows a hydrogen bond to form with the plp oxygen at the position 3 in the ring
