Aja viide. Aja lugu.

In enzymology, an ornithine racemase (EC 5.1.1.12) is an enzyme that catalyzes the chemical reaction:

L-ornithine

\rightleftharpoons

D-ornithine

Hence, this enzyme has one substrate, L-ornithine, and one product, D-ornithine.

This enzyme belongs to the family of isomerases, specifically those racemases and epimerases acting on amino acids and derivatives. The systematic name of this enzyme class is ornithine racemase. This enzyme participates in d-arginine and d-ornithine metabolism.

References

Isomerases: Epimerase and racemases (EC 5.1)
5.1.1: Amino acids	Amino-acid racemase: Phenylalanine racemase (ATP-hydrolysing) Serine racemase
5.1.2: Hydroxy acids	Mandelate racemase Isocitrate epimerase
5.1.3: Carbohydrates	UDP-glucose 4-epimerase N-acetylneuraminate epimerase Phosphopentose epimerase
5.1.99: Other	Methylmalonyl CoA epimerase

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)