Reaction: succinate semialdehyde + CoA + NADP+ = succinyl-CoA + NADPH + H+
For diagram of reaction click here.
Other name(s): succinyl-coA reductase; coenzyme-A-dependent succinate-semialdehyde dehydrogenase
Systematic name: succinate semialdehyde:NADP+ oxidoreductase (CoA-acetylating)
Comments: Catalyses the NADPH-dependent reduction of succinyl-CoA to succinate semialdehyde. The enzyme has been described in Clostridium kluyveri, where it participates in succinate fermentation [1]), and in Metallosphaera sedula, where it participates in the 3-hydroxypropanoate/4-hydroxybutanoate cycle, an autotrophic CO2 fixation pathway found in some thermoacidophilic archaea [2,3].
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:
References:
1. Sohling, B. and Gottschalk, G. Purification and characterization of a coenzyme-A-dependent succinate-semialdehyde dehydrogenase from Clostridium kluyveri. Eur. J. Biochem. 212 (1993) 121-127. [PMID: 8444151]
2. Alber, B., Olinger, M., Rieder, A., Kockelkorn, D., Jobst, B., Hugler, M. and Fuchs, G. Malonyl-coenzyme A reductase in the modified 3-hydroxypropionate cycle for autotrophic carbon fixation in archaeal Metallosphaera and Sulfolobus spp. J. Bacteriol. 188 (2006) 8551-8559. [PMID: 17041055]
3. Berg, I.A., Kockelkorn, D., Buckel, W. and Fuchs, G. A 3-hydroxypropionate/4-hydroxybutyrate autotrophic carbon dioxide assimilation pathway in Archaea. Science 318 (2007) 1782-1786. [PMID: 18079405]