Levopimaradiene synthase

Levopimaradiene synthase (EC 4.2.3.32, PtTPS-LAS, LPS, copalyl-diphosphate diphosphate-lyase [abieta-8(14),12-diene-forming]) is an enzyme with systematic name (+)-copalyl-diphosphate diphosphate-lyase (abieta-8(14),12-diene-forming).^[1]^[2] This enzyme catalyses the following chemical reaction

(+)-copalyl diphosphate

\rightleftharpoons

abieta-8(14),12-diene + diphosphate

In Ginkgo, the enzyme catalyses the initial cyclization step in the biosynthesis of ginkgolides.

References

↑ Schepmann, H.G., Pang, J. and Matsuda, S.P. (2001). "Cloning and characterization of Ginkgo biloba levopimaradiene synthase which catalyzes the first committed step in ginkgolide biosynthesis". Arch. Biochem. Biophys. 392 (2): 263–269. doi:10.1006/abbi.2001.2438. PMID 11488601.
↑ Ro, D.K. and Bohlmann, J. (2006). "Diterpene resin acid biosynthesis in loblolly pine (Pinus taeda): functional characterization of abietadiene/levopimaradiene synthase (PtTPS-LAS) cDNA and subcellular targeting of PtTPS-LAS and abietadienol/abietadienal oxidase (PtAO, CYP720B1)". Phytochemistry 67: 1572–1578. doi:10.1016/j.phytochem.2006.01.011. PMID 16497345.

External links

Levopimaradiene 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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