Alpha-terpinene synthase

Alpha-terpinene synthase (EC 4.2.3.115) is an enzyme with systematic name geranyl-diphosphate diphosphate-lyase (cyclizing, alpha-terpinene-forming).^[1]^[2] This enzyme catalyses the following chemical reaction

geranyl diphosphate

\rightleftharpoons

+ diphosphate

The enzyme has been characterized from Dysphania ambrosioides (American wormseed).

References[]

^ Poulose AJ, Croteau R (November 1978). "gamma-Terpinene synthetase: a key enzyme in the biosynthesis of aromatic monoterpenes". Archives of Biochemistry and Biophysics. 191 (1): 400–11. doi:10.1016/0003-9861(78)90104-2. PMID 736574.
^ LaFever RE, Croteau R (March 1993). "Hydride shifts in the biosynthesis of the p-menthane monoterpenes alpha-terpinene, gamma-terpinene, and beta-phellandrene". Archives of Biochemistry and Biophysics. 301 (2): 361–6. doi:10.1006/abbi.1993.1156. PMID 8460944.

v t Carbon–oxygen lyases (EC 4.2) (primarily dehydratases)
4.2.1: Hydro-Lyases	Carbonic anhydrase Fumarase Aconitase Enolase Alpha Enolase 2 Enoyl-CoA hydratase/3-Hydroxyacyl ACP dehydrase Methylglutaconyl-CoA hydratase Tryptophan synthase Cystathionine beta synthase Porphobilinogen synthase 3-Isopropylmalate dehydratase Urocanase Uroporphyrinogen III synthase Nitrile hydratase
4.2.2: Acting on polysaccharides	Hyaluronate lyase
4.2.3: Acting on phosphates	Threonine synthase
4.2.99: Other	Carboxymethyloxysuccinate lyase Hydroperoxide lyase

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)