Vetispiradiene synthase

This enzyme belongs to the family of lyases, specifically those carbon-oxygen lyases acting on phosphates. The systematic name of this enzyme class is trans,trans-farnesyl-diphosphate diphosphate-lyase (cyclizing, vetispiradiene-forming). Other names in common use include vetispiradiene-forming farnesyl pyrophosphate cyclase, pemnaspirodiene synthase, HVS, and vetispiradiene cyclase. This enzyme participates in terpenoid biosynthesis.

References

Back K, Chappell J (1995). "Cloning and bacterial expression of a sesquiterpene cyclase from Hyoscyamus muticus and its molecular comparison to related terpene cyclases". J. Biol. Chem. 270 (13): 7375–81. doi:10.1074/jbc.270.13.7375. PMID 7706281.
Chappell J, Ricci P, Marco Y (1998). "Sesquiterpene cyclase is not a determining factor for elicitor- and pathogen-induced capsidiol accumulation in tobacco". Planta. 205 (3): 467–476. doi:10.1007/s004250050345.
Mathis JR, Back K, Starks C, Noel J, Poulter CD, Chappell J (1997). "Pre-steady-state study of recombinant sesquiterpene cyclases". Biochemistry. 36 (27): 8340–8. doi:10.1021/bi963019g. PMID 9204881.
Yoshioka H, Yamada N, Doke N (1999). "cDNA cloning of sesquiterpene cyclase and squalene synthase, and expression of the genes in potato tuber infected with Phytophthora infestans". Plant. Cell. Physiol. 40 (9): 993–8. PMID 10588069.
Martin VJ, Yoshikuni Y, Keasling JD (2001). "The in vivo synthesis of plant sesquiterpenes by Escherichia coli". Biotechnol. Bioeng. 75 (5): 497–503. doi:10.1002/bit.10037. PMID 11745124.

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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