EC Number   |
General Information |
Reference |
|---|
   4.2.3.108 | evolution |
enzyme AaTPS6 belongs to the terpene synthases family, TPS-b subfamily |
747873 |
| 4.2.3.108 | evolution |
the amounts and ratios of alpha-terpineol enantiomers is species-specific for cineole synthases and terpineol synthases of different species, overview. For Nicotinana forgetiana, the S:R ratio ((S)-(-)-alpha-terpineol to (R)-(+)-alpha-terpineol) is 7.7-7.9:1 |
748984 |
| 4.2.3.108 | evolution |
the monoterpene synthase belongs to the terpene synthases superfamily, TPS-b clade |
748974 |
| 4.2.3.108 | metabolism |
cyclization reactions of monoterpene synthases, overview. Substrate GPP is ionized by diphosphate elimination, resulting in the geranyl cation. Subsequently, this cation is converted into the linalyl cation and alpha-terpinyl cation. The synthesis of the acyclic beta-myrcene might proceed via the geranyl cation or via the linalyl cation by deprotonation. The intermediate alpha-terpinyl cation is the precursor for all cyclic monoterpenes. The 2,7-ring closure results in the pinyl cation, which is deprotonated to synthesize beta-pinene and alpha-pinene. Sabinene, with a cyclopropane ring, is released after two carbocation formations and 2,6-ring closure. alpha-Terpineol is formed after water capture of the alpha-terpinyl cation. Broken lines indicate possible reactions leading to 1,8-cineole. A cyclization reaction resulting in 1,8-cineole uses alpha-terpineol as a precursor. Enzyme structure homology modelling |
748984 |
| 4.2.3.108 | metabolism |
in Artemisia annua, three monoterpene synthases AaTPS2, AaTPS5, and AaTPS6, produce beta-myrcene, camphene, and 1,8-cineole as the major products, respectively |
747873 |
| 4.2.3.108 | more |
the amino acids at positions 147, 148, and 266 determine the different terpineol-cineole ratios in Nicotiana suaveolens cineole synthase and Nicotiana langsdorffii terpineol synthase |
748984 |
| 4.2.3.108 | more |
the amino acids at positions 147, 148, and 266 determine the different terpineol-cineole ratios in Nicotiana suaveolens cineole synthase and Nicotiana langsdorffii terpineol synthase. Homology modeling of 1,8-cineole synthases of Nicotiana forgetiana and Nicotiana suaveolens |
748984 |
| 4.2.3.108 | physiological function |
fresh Laurus nobilis leaves, the monoterpene 1,8-cineole is the main volatile compound, and alpha-terpinyl acetate, terpinene-4-ol, alpha- and beta-pinene, sabinene, and linalool are reported to occur in appreciable levels. The 1,8-cineole content is also higher in femal flowers, overview |
748974 |
| 4.2.3.108 | physiological function |
the monoterpene synthase TPS6 might play a role in plant-environment interactions |
747873 |
