Beta-seco-amyrin synthase - Misplaced Pages

β-seco-amyrin synthase (EC 5.4.99.54) is an enzyme with systematic name (3S)-2,3-epoxy-2,3-dihydrosqualene mutase (cyclizing, beta-seco-amyrin-forming). This enzyme catalyses the following chemical reaction

(3S)-2,3-epoxy-2,3-dihydrosqualene

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beta-seco-amyrin

The enzyme from Arabidopsis thaliana is multifunctional.

References

Shibuya M, Xiang T, Katsube Y, Otsuka M, Zhang H, Ebizuka Y (February 2007). "Origin of structural diversity in natural triterpenes: direct synthesis of seco-triterpene skeletons by oxidosqualene cyclase". Journal of the American Chemical Society. 129 (5): 1450–5. doi:10.1021/ja066873w. PMID 17263431.

v t e Isomerase: mutases (EC 5.4)
5.4.1 Acyl Groups	Lysolecithin acylmutase Precorrin-8X methylmutase
5.4.2 Phosphomutases	Phosphoglycerate mutase Bisphosphoglycerate mutase Phosphoglucomutase Phosphomannomutase PMM1 PMM2 Phosphoenolpyruvate mutase
5.4.99 Other groups	Cycloartenol synthase Lanosterol synthase Lupeol synthase Methylmalonyl-CoA mutase

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)