1.1.1.406: galactitol 2-dehydrogenase (L-tagatose-forming)
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Reaction
Synonyms
galactitol dehydrogenase, GatDH, More
ECTree
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Systematic Name
Systematic Name on EC 1.1.1.406 - galactitol 2-dehydrogenase (L-tagatose-forming)
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galactitol:NAD+ 2-oxidoreductase (L-tagatose-forming)
The enzyme, characterized in the bacterium Rhodobacter sphaeroides, has a wide subtrate specificity. In addition to galactitol, it primarily oxidizes D-threitol and xylitol, and in addition to L-tagatose, it primarily reduces L-erythrulose, D-ribulose and L-glyceraldehyde. It is specific for NAD+. The enzyme also shows activity with D-tagatose (cf. EC 1.1.1.16, galactitol 2-dehydrogenase).