    3.5.2.7 | more |
catalytic mechanism, modeling, optimized structures of transition states and intermediates, combined quantum mechanics and molecular mechanics (QM/MM) calculations and modeling, overview. Activation of hydrolytic water (a zinc-bound water) is performed by residue E252 via a bridging water molecule, which occurs before binding of the substrate. After the substrate binding, this activation channel is blocked by the substrate, and the other two residues (D324 and H272) cannot act as the general base to activate the hydrolytic water. For the two (S)-enantiomers of IPA, HutI can specifically convert one isomer of (S)-enantiomer (SIPA-1) to l-formiminoglutamic acid |
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