- D-amino acid dehydrogenase
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D-amino-acid dehydrogenase (EC 1.4.99.1) is a bacterial enzyme that catalyses the oxidation of D-amino acids into their corresponding oxoacids. It contains both flavin and nonheme iron as cofactors.[1] The enzyme has a very broad specificity and can act on most D-amino acids.[2]
D-amino acid + H2O + acceptor <=> a 2-oxo acid + NH3 + reduced acceptor
This reaction is distinct from the oxidation reaction catalysed by D-amino acid oxidase that uses oxygen as a second substrate, as the dehydrogenase can use many different compounds as electron acceptors, with the physiological substrate being coenzyme Q.[1][3]
See also
References
- ^ a b Olsiewski PJ, Kaczorowski GJ, Walsh C (25 May 1980). "Purification and properties of D-amino acid dehydrogenase, an inducible membrane-bound iron-sulfur flavoenzyme from Escherichia coli B". J. Biol. Chem. 255 (10): 4487–94. PMID 6102989. http://www.jbc.org/cgi/reprint/255/10/4487.
- ^ Tsukada K (10 October 1966). "D-amino acid dehydrogenases of Pseudomonas fluorescens". J. Biol. Chem. 241 (19): 4522–8. PMID 5925166. http://www.jbc.org/cgi/reprint/241/19/4522.
- ^ Jones H, Venables WA (1983). "Effects of solubilisation on some properties of the membrane-bound respiratory enzyme D-amino acid dehydrogenase of Escherichia coli". FEBS Lett. 151 (2): 189–92. doi:10.1016/0014-5793(83)80066-0. PMID 6131836.
External links
CH-NH2 oxidoreductases (EC 1.4) - primarily amino acid oxidoreductases 1.4.1: NAD/NADP acceptor 1.4.3: oxygen acceptor 1.4.4: disulfide acceptor 1.4.99: other acceptors D-amino acid dehydrogenase - Amine dehydrogenaseMetabolism: Citric acid cycle enzymes Cycle Anaplerotic to acetyl-CoAPyruvate dehydrogenase complex (E1, E2, E3)
(regulated by Pyruvate dehydrogenase kinase and Pyruvate dehydrogenase phosphatase)to succinyl-CoAto oxaloacetateMitochondrial
electron transport chain/
oxidative phosphorylationPrimaryComplex I/NADH dehydrogenase · Complex II/Succinate dehydrogenase · Coenzyme Q · Complex III/Coenzyme Q - cytochrome c reductase · Cytochrome c · Complex IV/Cytochrome c oxidase
Coenzyme Q10 synthesis: COQ2 · COQ3 · COQ4 · COQ5 · COQ6 · COQ7 · COQ9 · COQ10A · COQ10B · PDSS1 · PDSS2OtherMetabolism (Catabolism, Anabolism) General Cellular respiration Aerobic RespirationSpecific paths HumanNonhumanOtherNucleotide metabolismOtherbiochemical families: prot · nucl · carb (glpr, alco, glys) · lipd (fata/i, phld, strd, gllp, eico) · amac/i · ncbs/i · ttpy/iThis enzyme-related article is a stub. You can help Wikipedia by expanding it. This article about metabolism is a stub. You can help Wikipedia by expanding it.