EC Number   |
General Information |
Reference |
|---|
  4.2.3.111 | evolution |
distribution of alpha-terpineol content in the 61 grapevine accessions |
747364 |
| 4.2.3.111 | malfunction |
oleocellosis is a serious physiological disorder in citrus fruit that mainly results in appearance and quality deterioration. Large changes in the volatile profiles and gene expression in terpenoid metabolism are observed in oleocellosis peels compared to healthy ones. For gene expressions in terpenoid metabolism, the upregulated genes aldehyde dehydrogenase (NAD+) (ALDH) and the downregulated genes beta-caryophyllene synthase 1 (BCS1), alpha-terpineol synthase 2 (TES2), and myrcene synthase (MS) are the main differences in oleocellosis peels |
747814 |
| 4.2.3.111 | metabolism |
cyclization reactions of monoterpene synthases, overview. Substrate geranyl diphosphate 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 |
748984 |
| 4.2.3.111 | 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 |
| 4.2.3.111 | physiological function |
alpha-terpineol is one of the main monoterpenes found in the grape berry (Vitis vinifera) with its concentrations varying in different varieties. Identification of associations between the alpha-terpineol synthase (alpha-TPS) gene, a regulator of alpha-terpineol metabolism, and alpha-terpineol content in different grapevine varieties |
747364 |
