Substrates: - Products: i.e. (2S,3R)-2,3-dihydroxy-5-oxohexanedioate. Product is the enantiomer of the product obtained in the reaction catalyzed by bifunctional L-talarate/galactarate dehydratase. When the GalrD-II-catalyzed reaction is performed in D2O, the proS hydrogen is replaced with deuterium, i.e., the acid that facilitates the departure of the OH group is likely the acid that catalyzes the formation of the alpha-oxo-beta-methylene product
Substrates: - Products: i.e. (2S,3R)-2,3-dihydroxy-5-oxohexanedioate. Product is the enantiomer of the product obtained in the reaction catalyzed by bifunctional L-talarate/galactarate dehydratase. When the GalrD-II-catalyzed reaction is performed in D2O, the proS hydrogen is replaced with deuterium, i.e., the acid that facilitates the departure of the OH group is likely the acid that catalyzes the formation of the alpha-oxo-beta-methylene product
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CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
wild-type and mutant Y90F. A Tyr 164-Arg 162 dyad is the base that initiates the reaction by abstraction of the alpha-proton and Tyr 90 is the acid that facilitates departure of the beta-OH leaving group. The structure contains two Mg2+ ions located 10.4 A from one another, with one located in the canonical position in the (beta/alpha)7beta-barrel, the second is located in a site within the capping domain
Computation-facilitated assignment of the function in the enolase superfamily: a regiochemically distinct galactarate dehydratase from Oceanobacillus iheyensis
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