(+)-camphene synthase

(+)-camphene synthase (EC 4.2.3.116) is an enzyme with systematic name geranyl-diphosphate diphosphate-lyase [cyclizing, (+)-camphene-forming].^[1]^[2]^[3]^[4] This enzyme catalyses the following chemical reaction

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Cyclase I of Salvia officinalis (sage) gives about equal parts (+)-camphene and (+)-alpha-pinene.

References

^ Gambliel H, Croteau R (January 1984). "Pinene cyclases I and II. Two enzymes from sage (Salvia officinalis) which catalyze stereospecific cyclizations of geranyl pyrophosphate to monoterpene olefins of opposite configuration". The Journal of Biological Chemistry. 259 (2): 740–8. PMID 6693393.
^ Croteau R, Satterwhite DM, Cane DE, Chang CC (July 1988). "Biosynthesis of monoterpenes. Enantioselectivity in the enzymatic cyclization of (+)- and (–)-linalyl pyrophosphate to (+)- and (–)-pinene and (+)- and (–)-camphene". The Journal of Biological Chemistry. 263 (21): 10063–71. PMID 3392006.
^ Wagschal KC, Pyun HJ, Coates RM, Croteau R (February 1994). "Monoterpene biosynthesis: isotope effects associated with bicyclic olefin formation catalyzed by pinene synthases from sage (Salvia officinalis)". Archives of Biochemistry and Biophysics. 308 (2): 477–87. doi:10.1006/abbi.1994.1068. PMID 8109978.
^ Pyun HJ, Wagschal KC, Jung DI, Coates RM, Croteau R (February 1994). "Stereochemistry of the proton elimination in the formation of (+)- and (–)-alpha-pinene by monoterpene cyclases from sage (Salvia officinalis)". Archives of Biochemistry and Biophysics. 308 (2): 488–96. doi:10.1006/abbi.1994.1069. PMID 8109979.

(+)-camphene+synthase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

v t e 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 Pectin lyase
4.2.3: Acting on phosphates	Threonine synthase
4.2.99: Other	Carboxymethyloxysuccinate lyase Hydroperoxide lyase

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)