2,4-diaminopentanoate dehydrogenase

The 4 substrates of this enzyme are 2,4-diaminopentanoate, H₂O, NAD⁺, and NADP⁺, whereas its 5 products are 2-amino-4-oxopentanoate, NH₃, NADH, NADPH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH2 group of donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 2,4-diaminopentanoate:NAD(P)+ oxidoreductase (deaminating). This enzyme is also called 2,4-diaminopentanoic acid C4 dehydrogenase. This enzyme participates in 3 metabolic pathways: lysine degradation, arginine and proline metabolism, and d-arginine and d-ornithine metabolism.

References

Somack R, Costilow RN (1973). "2,4-diaminopentanoic acid C 4 dehydrogenase. Purification and properties of the protein". J. Biol. Chem. 248 (2): 385–8. PMID 4684685.
Stadtman TC (1973). "Lysine metabolism by clostridia. XIIB 2,4-Diaminohexanoate dehydrogenase (2,4-diaminopentanoate dehydrogenase)". Adv. Enzymol. Relat. Areas Mol. Biol. 38: 441–445.
Tsuda Y, Friedmann HC (1970). "Ornithine metabolism by Clostridium sticklandii. Oxidation of ornithine to 2-amino-4-ketopentanoic acid via 2,4-diaminopentanoic acid; participation of B12 coenzyme, pyridoxal phosphate, and pyridine nucleotide". J. Biol. Chem. 245 (22): 5914–26. PMID 4394942.

CH-NH₂ oxidoreductases (EC 1.4) - primarily amino acid oxidoreductases

1.4.1: NAD/NADP acceptor	Glutamate dehydrogenase GLUD1 GLUD2 Glutamate synthase (NADPH)

1.4.3: oxygen acceptor	D-amino acid oxidase Amine oxidase (Copper-containing (Lysyl Diamine Primary-amine)) (Flavin-containing (Monoamine)))

1.4.4: disulfide acceptor	Glycine cleavage system

1.4.99: other acceptors	D-amino acid dehydrogenase Amine dehydrogenase

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)

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