Tetrahydroxypteridine cycloisomerase

This enzyme belongs to the family of isomerases, specifically the class of intramolecular lyases. The systematic name of this enzyme class is tetrahydroxypteridine lyase (isomerizing). It employs one cofactor, NAD+.

References

Mcnutt WS, Damle SP (December 1964). "Tetraoxypteridine isomerase". The Journal of Biological Chemistry. 239: 4272–9. PMID 14247682.

v t e Isomerase: Intramolecular Lyases (EC 5.5)
5.5.1 Intramolecular Lyases	muconate cycloisomerase 3-carboxy-cis,cis-muconate cycloisomerase tetrahydroxypteridine cycloisomerase inositol-3-phosphate synthase carboxy-cis,cis-muconate cyclase chalcone isomerase chloromuconate cycloisomerase bornyl diphosphate synthase cycloeucalenol cycloisomerase a-pinene-oxide decyclase dichloromuconate cycloisomerase copalyl diphosphate synthase ent-copalyl diphosphate synthase syn-copalyl-diphosphate synthase terpentedienyl-diphosphate synthase halimadienyl-diphosphate synthase (S)-beta-macrocarpene synthase lycopene epsilon-cyclase lycopene beta-cyclase prosolanapyrone-III cycloisomerase

Isomerase: Intramolecular Lyases (EC 5.5)

5.5.1 Intramolecular Lyases

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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