Crystal Structure of imidazolonepropionase complexed with imidazole-4-acetic acid sodium salt, a substrate homologue

A catalytic mechanism revealed by the crystal structures of the imidazolonepropionase from Bacillus subtilis

MPKQIDTILINIGQLLTMESSGPRAGKSMQDLHVIEDAVVGIHEQKIVFAGQKGAEAGYEADEIIDCSGRLVTPGLVDPH
THLVFGGSREKEMNLKLQGISYLDILAQGGGILSTVKDTRAASEEELLQKAHFHLQRMLSYGTTTAEVKSGYGLEKETEL
KQLRVAKKLHESQPVDLVSTFMGAHAIPPEYQNDPDDFLDQMLSLLPEIKEQELASFADIFTETGVFTVSQSRRYLQKAA
EAGFGLKIHADEIDPLGGAELAGKLKAVSADHLVGTSDEGIKKLAEAGTIAVLLPGTTFYLGKSTYARARAMIDEGVCVS
LATDFNPGSSPTENIQLIMSIAALHLKMTAEEIWHAVTVNAAYAIGKGEEAGQLKAGRSADLVIWQAPNYMYIPYHYGVN
HVHQVMKNGTIVVNREGAILG

20%(w/v) PEG4000, 0.1M Tris-HCl pH7.5, 0.05M Imidazoli-4-acetic acid sodium salt, 2%(w/v) benzamidine hydrochloride, VAPOR DIFFUSION, temperature 289K