3-hydroxypropionate dehydrogenase (NADP+)

3-hydroxypropionate dehydrogenase (NADP⁺) (EC 1.1.1.298) is an enzyme with systematic name 3-hydroxypropionate:NADP⁺ oxidoreductase.^[1]^[2]^[3] This enzyme catalyses the following chemical reaction

3-hydroxypropionate + NADP⁺

\rightleftharpoons

malonate semialdehyde + NADPH + H⁺

This enzyme catalyses the reduction of malonate semialdehyde to 3-hydroxypropionate, which is a key step in the 3-hydroxypropionate and the 3-hydroxypropionate/4-hydroxybutyrate cycles, autotrophic CO₂ fixation pathways found in some green non-sulfur phototrophic bacteria and archaea, respectively. The enzyme from Chloroflexus aurantiacus is bifunctional, and also catalyses the upstream reaction in the pathway, EC 1.2.1.75. Different from EC 1.1.1.59, 3-hydroxypropionate dehydrogenase (NAD⁺), by cofactor preference.

References

↑ Strauss, G. and Fuchs, G. (1993). "Enzymes of a novel autotrophic CO₂ fixation pathway in the phototrophic bacterium Chloroflexus aurantiacus, the 3-hydroxypropionate cycle". Eur. J. Biochem. 215: 633–643. doi:10.1111/j.1432-1033.1993.tb18074.x. PMID 8354269.
↑ Berg, I. A., Kockelkorn, D., Buckel, W. and Fuchs, G. (2007). "A 3-hydroxypropionate/4-hydroxybutyrate autotrophic carbon dioxide assimilation pathway in Archaea". Science 318: 1782–1786. doi:10.1126/science.1149976. PMID 18079405.
↑ Hugler, M., Menendez, C., Schagger, H. and Fuchs, G. (2002). "Malonyl-coenzyme A reductase from Chloroflexus aurantiacus, a key enzyme of the 3-hydroxypropionate cycle for autotrophic CO₂ fixation". J. Bacteriol. 184 (9): 2404–2410. doi:10.1128/jb.184.9.2404-2410.2002. PMC 134993. PMID 11948153.

Oxidoreductases: alcohol oxidoreductases (EC 1.1)

1.1.1: NAD/NADP acceptor	3-hydroxyacyl-CoA dehydrogenase 3-hydroxybutyryl-CoA dehydrogenase Alcohol dehydrogenase Aldo-keto reductase 1A1 1B1 1B10 1C1 1C3 1C4 7A2 Aldose reductase Beta-Ketoacyl ACP reductase Carbohydrate dehydrogenases Carnitine dehydrogenase D-malate dehydrogenase (decarboxylating) DXP reductoisomerase Glucose-6-phosphate dehydrogenase Glycerol-3-phosphate dehydrogenase HMG-CoA reductase IMP dehydrogenase Isocitrate dehydrogenase Lactate dehydrogenase L-threonine dehydrogenase L-xylulose reductase Malate dehydrogenase Malate dehydrogenase (decarboxylating) Malate dehydrogenase (NADP+) Malate dehydrogenase (oxaloacetate-decarboxylating) Malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+) Phosphogluconate dehydrogenase Sorbitol dehydrogenase Hydroxysteroid dehydrogenase: 3 Beta 3-beta-HSD NSDHL 11 Beta HSD11B1 HSD11B2 17 Beta

1.1.2: cytochrome acceptor	D-lactate dehydrogenase (cytochrome) D-lactate dehydrogenase (cytochrome c-553) Mannitol dehydrogenase (cytochrome)

1.1.3: oxygen acceptor	Glucose oxidase L-gulonolactone oxidase Xanthine oxidase

1.1.4: disulfide as acceptor	Vitamin K epoxide reductase Vitamin-K-epoxide reductase (warfarin-insensitive)

1.1.5: quinone/similar acceptor	Malate dehydrogenase (quinone) Quinoprotein glucose dehydrogenase

1.1.99: other acceptors	Choline dehydrogenase L2HGDH

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases(list) EC2 Transferases(list) EC3 Hydrolases(list) EC4 Lyases(list) EC5 Isomerases(list) EC6 Ligases(list)

External links

3-hydroxypropionate dehydrogenase (NADP ) at the US National Library of Medicine Medical Subject Headings (MeSH)

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