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EC 1.1.1.298 Details
EC number
1.1.1.298
Accepted name
3-hydroxypropionate dehydrogenase (NADP+)
Reaction
3-hydroxypropanoate + NADP+ = malonate semialdehyde + NADPH + H+
Other name(s)
3-hydroxypropanoate dehydrogenase (NADP+), 3-hydroxypropionate:NADP+ oxidoreductase
Systematic name
3-hydroxypropanoate:NADP+ oxidoreductase
Comment
Catalyses the reduction of malonate semialdehyde to 3-hydroxypropanoate, a key step in the 3-hydroxypropanoate and the 3-hydroxypropanoate/4-hydroxybutanoate cycles, autotrophic CO2 fixation pathways found in some green non-sulfur phototrophic bacteria and archaea, respectively [1,2]. The enzyme from Chloroflexus aurantiacus is bifunctional, and also catalyses the upstream reaction in the pathway, EC 1.2.1.75 [3]. Different from EC 1.1.1.59 [3-hydroxypropionate dehydrogenase (NAD+)] by cofactor preference.
History
created 2009
EC Tree
2.5.1.12 created 1972, deleted 1976
2.5.1.13 created 1972, deleted 1976
2.5.1.14 created 1972, deleted 1976
2.5.1.37 created 1989, deleted 2004
2.5.1.40 created 1992, deleted 1999