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EC 4.2.1.159 Details
EC number
4.2.1.159
Accepted name
dTDP-4-dehydro-6-deoxy-α-D-glucopyranose 2,3-dehydratase
Reaction
dTDP-4-dehydro-6-deoxy-α-D-glucopyranose = dTDP-3,4-didehydro-2,6-dideoxy-α-D-glucose + H2O (overall reaction);;(1a) dTDP-4-dehydro-6-deoxy-α-D-glucopyranose = dTDP-2,6-dideoxy-D-glycero-hex-2-enos-4-ulose + H2O;;(1b) dTDP-2,6-dideoxy-D-glycero-hex-2-enos-4-ulose = dTDP-3,4-didehydro-2,6-dideoxy-α-D-glucose (spontaneous)
Other name(s)
jadO (gene name), evaA (gene name), megBVI (gene name), eryBV (gene name), mtmV (gene name), oleV (gene name), spnO (gene name), TDP-4-keto-6-deoxy-D-glucose 2,3-dehydratase, dTDP-4-dehydro-6-deoxy-α-D-glucopyranose hydro-lyase (dTDP-(2R,6S)-2,4-dihydroxy-6-methyl-2,6-dihydropyran-3-one-forming)
Systematic name
dTDP-4-dehydro-6-deoxy-α-D-glucopyranose hydro-lyase (dTDP-2,6-dideoxy-D-glycero-hex-2-enos-4-ulose-forming)
Comment
The enzyme participates in the biosynthesis of several deoxysugars, including β-L-4-epi-vancosamine, α-L-megosamine, L- and D-olivose, D-oliose, D-mycarose, forosamine and β-L-digitoxose. In vitro the intermediate can undergo a spontaneous decomposition to maltol [2,3].
History
created 2015
EC Tree
1.14.13.45 created 1992, deleted 2003