Sclareol cyclase

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Sclareol cyclase (EC 3.1.7.4, geranylgeranyl pyrophosphate:sclareol cyclase, geranylgeranyl pyrophosphate-sclareol cyclase, GGPP:sclareol cyclase) is an enzyme with systematic name geranylgeranyl-diphosphate diphosphohydrolase (sclareol-forming).^[1]^[2]^[3] This enzyme catalyses the following chemical reaction

geranylgeranyl diphosphate + 2 H₂O

\rightleftharpoons

sclareol + diphosphate

This enzyme requires Mg²⁺ or Mn²⁺ for activity.

References

↑ Banthorpe, D.V., Brown, J.T. and Morris, G.S. (1992). "Partial purification of farnesyl pyrophosphate:drimenol cyclase and geranylgerany pyrophosphate:sclareol cyclase, using cell culture as a source of material". Phytochemistry 31 (10): 3391–3395. doi:10.1016/0031-9422(92)83692-R.
↑ Dimas, K., Hatziantoniou, S., Tseleni, S., Khan, H., Georgopoulos, A., Alevizopoulos, K., Wyche, J.H., Pantazis, P. and Demetzos, C. (2007). "Sclareol induces apoptosis in human HCT116 colon cancer cells in vitro and suppression of HCT116 tumor growth in immunodeficient mice". Apoptosis 12 (4): 685–694. doi:10.1007/s10495-006-0026-8. PMID 17260186.
↑ Guo, Z. and Wagner, G.J. (1995). "Biosynthesis of labdenediol and sclareol in cell-free extracts from trichomes of Nicotiana glutinosa". Planta 197 (4): 627–632. doi:10.1007/BF00191570.

External links

Sclareol cyclase at the US National Library of Medicine Medical Subject Headings (MeSH)

Hydrolase: esterases (EC 3.1)

3.1.1: Carboxylic
ester hydrolases

Lipase

Phospholipase
- A1
- A2
- B

3.1.2: Thioesterase

3.1.3: Phosphatase

3.1.4: Phosphodiesterase

3.1.6: Sulfatase

Nuclease (includes
deoxyribonuclease and
ribonuclease)

3.1.11-16: Exonuclease

Exodeoxyribonuclease	RecBCD

Exoribonuclease	Oligonucleotidase

3.1.21-31: Endonuclease

Endodeoxyribonuclease	Deoxyribonuclease I Deoxyribonuclease II Deoxyribonuclease IV Restriction enzyme UvrABC endonuclease

Endoribonuclease	RNase III RNase H 1 2A 2B 2C RNase P RNase A 1 2 3 4/5 RNase T1 RNA-induced silencing complex

either deoxy- or ribo-	Aspergillus nuclease S1 Micrococcal nuclease

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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