Isolated from Helianthus annuus (sunflower). The enzyme also produces beta-caryophyllene, delta-cadinene and traces of other sesquiterpenoids. See EC 4.2.3.13 (+)-delta-cadinene synthase, EC 4.2.3.57 (-)-beta-caryophyllene synthase.
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The enzyme appears in viruses and cellular organisms
Isolated from Helianthus annuus (sunflower). The enzyme also produces beta-caryophyllene, delta-cadinene and traces of other sesquiterpenoids. See EC 4.2.3.13 (+)-delta-cadinene synthase, EC 4.2.3.57 (-)-beta-caryophyllene synthase.
it is proposed that a basic amino acid residue of the enzyme abstracts a proton from a molecule of water as the hydroxyl adds to the double bond at carbon7 of geranylgeranyl diphosphate. Concerted cyclization occurs and the double bond at carbon14 of geranylgeranyl diphosphate (carbon-3 of (8R)-hydroxy-copalyl diphosphate) is protonated. This concerted mechanism accounts for the addition of a single atom of 18O and a single atom of deuterium to geranylgeranyl diphosphate to form (8R)-hydroxy-copalyl diphosphate
in orange tissues, the sesquiterpene profile is qualitatively rich. Overall, up to 25 sesquiterpenes are identified in total, overview. Small amounts of beta-caryophyllene are detected in all samples, while alpha-copaene, beta-elemene, alpha-humulene, and alpha-selinene are emitted by all tissues except young leaves. Beside this, each tissue shows a characteristic sesquiterpene emission profile. Major sesquiterpenes emitted by adult leaves are beta-elemene and beta-caryophyllene, while flowers emitt nerolidol, absent from most tissues analyzed. In fruit tissues, valencene emission contributes greatly to total emitted volatiles, in much more extent in peel than in pulp
tuber-specific over-expression of potato alpha-copaene synthase gene results in up to 15fold enhanced levels of alpha-copaene with a positive correlation between transgene expression level and alpha-copaene abundance. No aroma differences in the transgenic samples compared with controls and no significant differences in taste attributes are found. Sensory analysis suggests that alpha-copaene is not a major component of potato flavour
in sweet orange tissues sesquiterpene profile is qualitatively rich. Overall, up to 25 sesquiterpenes are identified in total. Enzyme CsSesquiTPS1 catalyzes formation of a 62:38% mixture of (Z)-beta-cubebene and alpha-copaene
gene CsSesquiTPS1, DNA and amino acid sequence determination and analysis, sequence comparisons and phylogenetic analysis, the enzyme encoded by CsSesquiTPS1 produces a 62:38% mixture of (Z)-beta-cubebene and alpha-copaene
tuber-specific over-expression of potato alpha-copaene synthase gene results in up to 15fold enhanced levels of alpha-copaene with a positive correlation between transgene expression level and alpha-copaene abundance. No aroma differences in the transgenic samples compared with controls and no significant differences in taste attributes are found. Sensory analysis suggests that alpha-copaene is not a major component of potato flavour
expression in Saccharomyces cerevisiae leads to a titer of (-)-alpha-copaene of 9 mg/l at 48 h and around 7 mg/l in Escherichia coli, and the titer of (+)-delta-cadinene is 6 mg/l in Saccharomyces cerevisiae and 3.5 mg/l in Escherichia coli
Molecular cloning and characterization of (+)-epi-alpha-bisabolol synthase, catalyzing the first step in the biosynthesis of the natural sweetener, hernandulcin, in Lippia dulcis
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4.2.3.133 alpha-copaene synthase
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