Delta-amyrin synthase

Delta-amyrin synthase (EC 5.4.99.55, SlTTS2 (gene)) is an enzyme with systematic name (3S)-2,3-epoxy-2,3-dihydrosqualene mutase (cyclizing, delta-amyrin-forming).^[1] This enzyme catalyses the following chemical reaction

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

\rightleftharpoons

The enzyme from tomato (Solanum lycopersicum) gives delta-amyrin, , beta-amyrin.

References[]

^ Wang Z, Guhling O, Yao R, Li F, Yeats TH, Rose JK, Jetter R (January 2011). "Two oxidosqualene cyclases responsible for biosynthesis of tomato fruit cuticular triterpenoids". Plant Physiology. 155 (1): 540–52. doi:10.1104/pp.110.162883. PMC 3075788. PMID 21059824.

Delta-amyrin+synthase at the US National Library of Medicine Medical Subject Headings (MeSH)

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v t 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	Methylmalonyl-CoA mutase Lanosterol synthase Lupeol synthase

v t Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Coenzyme 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)