D-serine ammonia-lyase

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The enzyme D-serine ammonia-lyase (EC 4.3.1.18), with systematic name D-serine ammonia-lyase (pyruvate-forming), catalyzes the chemical reaction

D-serine = pyruvate + NH₃ (overall reaction)

(1a) D-serine = 2-aminoprop-2-enoate + H₂O

(1b) 2-aminoprop-2-enoate = 2-iminopropanoate (spontaneous)

(1c) 2-iminopropanoate + H₂O = pyruvate + NH₃ (spontaneous

Other names in common use include D-hydroxyaminoacid dehydratase, D-serine dehydrase, D-hydroxy amino acid dehydratase, D-serine hydrolase, D-serine dehydratase (deaminating), D-serine deaminase, and D-serine hydro-lyase (deaminating). This enzyme participates in glycine, serine and threonine metabolism. It employs one cofactor, pyridoxal phosphate.

References

Dupourque D, Newton WA, Snell EE (1966). "Purification and properties of D-serine dehydrase from Escherichia coli". J. Biol. Chem. 241 (5): 1233–8. PMID 5327100.
METZLER DE, SNELL EE (1952). "Deamination of serine. II. D-Serine dehydrase, a vitamin B₆ enzyme from Escherichia coli". J. Biol. Chem. 198 (1): 363–73. PMID 12999751.

v t e Carbon–nitrogen lyases (EC 4.3)
4.3.1: ammonia-lyases	Histidine ammonia-lyase Formiminotransferase cyclodeaminase Serine dehydratase Phenylalanine ammonia-lyase
4.3.2: amidine-lyases	Argininosuccinate lyase Adenylosuccinate lyase

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)