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EC 5.1.3.31 Details
EC number
5.1.3.31
Accepted name
D-tagatose 3-epimerase
Reaction
(1) D-tagatose = D-sorbose;;(2) D-psicose = D-fructose
Other name(s)
L-ribulose 3-epimerase, ketose 3-epimerase
Systematic name
D-tagatose 3-epimerase
Comment
The enzymes isolated from the bacteria Pseudomonas cichorii [2], Pseudomonas sp. ST-24 [1], Rhodobacter sphaeroides [3] and Mesorhizobium loti [4] catalyse the epimerization of various ketoses at the C-3 position, interconverting D-fructose and D-psicose, D-tagatose and D-sorbose, D-ribulose and D-xylulose, and L-ribulose and L-xylulose. The specificity depends on the species. The enzymes from Pseudomonas cichorii and Rhodobacter sphaeroides require Mn2+ [2,3].
History
created 2014
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