Protein
5-hydroxybenzimidazole synthase BzaA
Organism
Moorella thermoacetica (strain ATCC 39073 / JCM 9320)
Function
Together with BzaB, probably catalyzes the conversion of aminoimidazole ribotide (AIR) to 5-hydroxybenzimidazole (5-HBI) in a radical S-adenosyl-L-methionine (SAM)-dependent reaction. Is thus involved in the anaerobic biosynthesis of the benzimidazole lower axial ligand of the cobamide produced by M.thermoacetica (PubMed:26246619). Requires BzaB for catalytic activity, as BzaA alone displays no activity (By similarity).
Similarity
Belongs to the ThiC family. 5-hydroxybenzimidazole synthase subfamily.
Sequence
MNLIESARAGLITPEMEQVAVQEGVTPEFVRQGVADGTIVILRNARRQNVTPVGVGKGLRTKVSASVGLYGETGGIDVEVAKIKAAVEAGTDAIMDLSVSGDIEAMLAETLAVSPKPVGTLPLYQAMAEAGRKYGSSVNMRDEDLFDVIERHAAAGVDFLALHCGTTMNIVERARNEGRIDPLVSYGGSHLIGWMLANRRENPLYEHFDRVLAIARKYDVTISFADGMRPGCLADSLDGPQVEELVVLGELVRRAREAGVQVMVKGPGHVPLQQLKATVVLEKSLCHGAPYFVFGPLVTDIAIGYDHINAAIGGALSAWAGAEFLCYVTAAEHVGIPDIDQVREGVIAARIAAHAADLANGLTCAREWDRELSRARKELDWKRQIALAIDPERAGRLREERSDAAAAGCAMCGKYCAMEIVSRYLGTARHTC