(+)-alpha-pinene synthase

(+)-alpha-pinene synthase (EC 4.2.3.121, (+)-alpha-pinene cyclase, cyclase I) is an enzyme with systematic name geranyl-diphosphate diphosphate-lyase (cyclizing, (+)-alpha-pinene-forming).^[1]^[2]^[3]^[4]^[5]^[6] This enzyme catalyses the following chemical reaction

geranyl diphosphate

\rightleftharpoons

(+)-alpha-pinene + diphosphate

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

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.
↑ Phillips MA, Savage TJ, Croteau R (December 1999). "Monoterpene synthases of loblolly pine (Pinus taeda) produce pinene isomers and enantiomers". Archives of Biochemistry and Biophysics. 372 (1): 197–204. doi:10.1006/abbi.1999.1467. PMID 10562434.
↑ Phillips MA, Wildung MR, Williams DC, Hyatt DC, Croteau R (March 2003). "cDNA isolation, functional expression, and characterization of (+)-alpha-pinene synthase and (-)-alpha-pinene synthase from loblolly pine (Pinus taeda): stereocontrol in pinene biosynthesis". Archives of Biochemistry and Biophysics. 411 (2): 267–76. doi:10.1016/s0003-9861(02)00746-4. PMID 12623076.

External links

( )-alpha-pinene synthase at the US National Library of Medicine Medical Subject Headings (MeSH)

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

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

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