D-lysopine dehydrogenase

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D-lysopine dehydrogenase

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In enzymology, a D-lysopine dehydrogenase (EC 1.5.1.16) is an enzyme that catalyzes the chemical reaction

N₂-(D-1-carboxyethyl)-L-lysine + NADP⁺ + H₂O

\rightleftharpoons

L-lysine + pyruvate + NADPH + H⁺

The 3 substrates of this enzyme are N2-(D-1-carboxyethyl)-L-lysine, NADP⁺, and H₂O, whereas its 4 products are L-lysine, pyruvate, NADPH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH group of donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is N2-(D-1-carboxyethyl)-L-lysine:NADP+ oxidoreductase (L-lysine-forming). Other names in common use include D-lysopine synthase, lysopine dehydrogenase, D(+)-lysopine dehydrogenase, 2-N-(D-1-carboxyethyl)-L-lysine:NADP+ oxidoreductase, and (L-lysine-forming). This enzyme participates in lysine degradation.

References

Otten LA, Vreugdenhil D, Schilperoort RA (1977). "Properties of D(+)-lysopine dehydrogenase from crown gall tumour tissue". Biochim. Biophys. Acta. 485 (2): 268–77. doi:10.1016/0005-2744(77)90163-2. PMID 21695.

v t e Oxidoreductases: CH-NH (EC 1.5)
1.5.1: NAD or NADP acceptor	Dihydrofolate reductase Saccharopine dehydrogenase Methylenetetrahydrofolate reductase
1.5.3: oxygen acceptor	Dihydrobenzophenanthridine oxidase Sarcosine oxidase Proline oxidase
1.5.5: quinone acceptor	Electron-transferring-flavoprotein dehydrogenase
1.5.99	Sarcosine dehydrogenase Cytokinin dehydrogenase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

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