In enzymology, an aldehyde dehydrogenase [NAD(P)+] () is an enzyme that catalyzes the chemical reaction an aldehyde + NAD(P)+ + H2O an acid + NAD(P)H + H+ The 4 substrates of this enzyme are aldehyde, NAD+, NADP+, and H2O, whereas its 4 products are acid, NADH, NADPH, and H+. This enzyme belongs to the family of oxidoreductases, specifically those acting on the aldehyde or oxo group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is aldehyde:NAD(P)+ oxidoreductase. Other names in common use include aldehyde dehydrogenase [NAD(P)+], and ALDH. This enzyme participates in 5 metabolic pathways: glycolysis / gluconeogenesis, histidine metabolism, tyrosine metabolism, phenylalanine metabolism, and metabolism of xenobiotics by cytochrome p450. Structural studies As of late 2007, 4 structures have been solved for this class of enzymes, with PDB accession codes , , , and . References Boyer, P.D., Lardy, H. and Myrback, K. (Eds.), The Enzymes, 2nd ed., vol. 7, Academic Press, New York, 1963, p. 203-221. EC 1.2.1 NADPH-dependent enzymes NADH-dependent enzymes Enzymes of known structure