D-amino acid dehydrogenase

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Overview

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

  1. 1.0 1.1 Olsiewski PJ, Kaczorowski GJ, Walsh C (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.
  2. Tsukada K (1966). "D-amino acid dehydrogenases of Pseudomonas fluorescens". J. Biol. Chem. 241 (19): 4522–8. PMID 5925166.
  3. 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. PMID 6131836.

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