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geranyl diphosphate = gamma-terpinene + diphosphate
geranyl diphosphate = gamma-terpinene + diphosphate
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geranyl diphosphate = gamma-terpinene + diphosphate
ionization of geranyl diphosphate folded in left-handed helical form gives, by syn-isomerization, (3R)-linalyl diphosphate, which by rotation about C2-C3 provides the cisoid, anti-endo conformation. Ionization and cyclization of this bound intermediate yield the (4R)-alpha-terpinyl cation that, following the 1,2-hydride shift, affords the terpinen-4-yl cation. Loss of the (5S)-proton terminates the reaction to generate gamma-terpinene
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geranyl diphosphate = gamma-terpinene + diphosphate
major products sabinene and gamma-terpinene are formed by a cyclization mechanism involving a 1,2-hydride shift in the alpha-terpinyl cation intermediate
geranyl diphosphate = gamma-terpinene + diphosphate
mechanism involves the cyclizazion of the acyclic precursor, loss of a proton from C5 to form the delta4 double bond, and a 1,2-hydride shift fom C4 to C8 to give gamma-terpinene
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geranyl diphosphate
gamma-terpinene + diphosphate
geranyl diphosphate + H2O
gamma-terpinene + diphosphate
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63% sabinene, 21% gamma-terpinene, 7% terpinolene, 6.5% limonene, and 2.5% myrcene
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?
neryl diphosphate
gamma-terpinene + diphosphate
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75% gamma-terpinene, 20% alpha-thujene, 5% alpha-terpineol, partially purified enzyme
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additional information
?
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geranyl diphosphate
gamma-terpinene + diphosphate
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products are 71.4% gamma-terpinene, with lower amounts of limonene (9.1%), alpha-pinene (5.6%), beta-pinene (4.7%), alpha-terpinolene (3.7%), alpha-thujene (2.5%), alpha-terpinene (1.7%), myrcene (0.9%), sabinene (0.4%) and a trace of p-cymene
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geranyl diphosphate
gamma-terpinene + diphosphate
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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plus small amounts of alpha-pinene, limonene
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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geranyl diphosphate
gamma-terpinene + diphosphate
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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products are 80% gamma-terpinene and the minor products, alpha-thujene (7.2%), alpha-terpinene (6%), myrcene (2.6%), sabinene (1.3%), (+)-R-limonene (1.2%), alpha-pinene (1%) and alpha-phellandrene (0.8%), as well as trace amounts of p-cymene and beta-pinene
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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geranyl diphosphate
gamma-terpinene + diphosphate
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plus minor products alpha-thujene, alpha-pinene, sabinene, beta-myrcene, alpha-terpinene
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?
geranyl diphosphate
gamma-terpinene + diphosphate
R4JHV6
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plus minor products such as alpha-terpinene and alpha-thujene
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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ionization of geranyl diphosphate folded in left-handed helical form gives, by syn-isomerization, (3R)-linalyl diphosphate, which by rotation about C2-C3 provides the cisoid, anti-endo conformation. Ionization and cyclization of this bound intermediate yield the (4R)-alpha-terpinyl cation that, following the 1,2-hydride shift, affords the terpinen-4-yl cation. Loss of the (5S)-proton terminates the reaction to generate gamma-terpinene
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?
geranyl diphosphate
gamma-terpinene + diphosphate
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products are about 64% gamma-terpinen, 10% alpha-thujene, 4% myrcene, 4% alpha-terpinene, 2% limonene, 3% linalool, 2% terpinen-4-ol, 3% alpha-terpineol
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additional information
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product identification and quantification by GC-MS analysis
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additional information
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product identification and quantification by GC-MS analysis
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additional information
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GC-MS analysis of reaction product
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additional information
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GC-MS analysis of reaction product
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?
additional information
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no substrate farnesyl diphosphate
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?
additional information
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product identification and quantification by GC-MS analysis
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?
additional information
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product identification and quantification by GC-MS analysis
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additional information
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product identification and quantification by GC-MS analysis
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?
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physiological function
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enzyme OsTPS24 is localized in chloroplasts and produced the monoterpene, gamma-terpinene. The amount of gamma-terpinene increased after jasmonate treatment. gamma-Terpinene has significant antibacterial activity against Xanthomonas oryzae pv. oryzae (Xoo), but it does not show significant antifungal activity against Magnaporthe oryzae. The antibacterial activity of gamma-terpinene against Xoo is caused by damage to bacterial cell membranes. These results suggest that gamma-terpinene plays an important role in jasmonate-induced resistance against Xoo, and that it functions as an antibacterial compound in rice plants
physiological function
The biosynthesis of gamma-terpinene, a precursor of the phenolic isomers thymol and carvacrol found in the essential oil from Thymus sp., is attributed to the activitiy of gamma-terpinene synthase (TvTPS)
physiological function
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the monoterpene synthase activity is predominantly regulated at the level of transcription, and the phenolic monoterpene alcohol thymol is derived from gamma-terpinene, the product of a single monoterpene synthase. Terpene synthase expression levels directly control the composition of the essential oils. Proportion (%) changes of essential oil components in different varieties of Origanum majorana, GC-MS analysis of plant volatiles, overview
physiological function
the monoterpene synthase activity is predominantly regulated at the level of transcription, and the phenolic monoterpene alcohol thymol is derived from gamma-terpinene, the product of a single monoterpene synthase. Terpene synthase expression levels directly control the composition of the essential oils. Proportion (%) changes of essential oil components in different varieties of Origanum vulgare, GC-MS analysis of plant volatiles, overview
additional information
putative active site of TvTPS is deduced from its pronounced structural similarity to enzymes from other species of the Lamiaceae family involved in terpenoid biosynthesis
additional information
putative active site of TvTPS is deduced from its pronounced structural similarity to enzymes from other species of the Lamiaceae family involved in terpenoid biosynthesis
additional information
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putative active site of TvTPS is deduced from its pronounced structural similarity to enzymes from other species of the Lamiaceae family involved in terpenoid biosynthesis
additional information
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tissue-specific expression patterns of genes associated with the terpeniod biosynthesis in two oregano species Origanum vulgare and Origanum majorana, GC-MS analysis of plant volatiles, overview
additional information
tissue-specific expression patterns of genes associated with the terpeniod biosynthesis in two oregano species Origanum vulgare and Origanum majorana, GC-MS analysis of plant volatiles, overview
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expression in Escherichia coli
gene CitMTSL61, HA-tag and a start codon are introduced to the synthetic gene before the arginine pair at position R56-R57 by using PCR to create gTerpS, recombinant overexpression of the codon-optimized gTerpS from plasmid pHHO5 in Aspergillus nidulans strain A772 resulting in production of gamma-terpinene, and expression of codon-optimized gTerpS in Saccharomyces cerevisiae strain H2802 from vector B1181. Real-time quantitative reverse transcription PCR expression analysis. Aspergillus nidulans is capable of heterologous terpene production and thus has potential as a production host for industrially relevant compounds
gene OsTPS24, DNA and amino acid sequence determination and analysis, quantitative RT-PCR expression analysis, functional recombinant expression of His-tagged recombinant TPS24 lacking the putative chloroplast transit sequence in Escherichia coli, expression of GFP-tagged enzyme in Oryza sativa protoplasts chloroplasts
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gene TvTPS, DNA and amino acid sequence determination and analysis, recombinant expression of His-tagged enzyme in Escherichia coli strain BL21 CodonPlus
real-time PCR enzyme expression analysis
expression in Escherichia coli
expression in Escherichia coli
expression in Escherichia coli
real-time PCR enzyme expression analysis
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real-time PCR enzyme expression analysis
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Monoterpene synthases from common sage (Salvia officinalis). cDNA isolation, characterization, and functional expression of (+)-sabinene synthase, 1,8-cineole synthase, and (+)-bornyl diphosphate synthase
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Characterization of gamma-terpinene synthase from Citrus unshiu (Satsuma mandarin)
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Citrus unshiu (Q6F5H1), Citrus unshiu
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Lukas, B.; Samuel, R.; Novak, J.
Oregano or marjoram? The enzyme gamma-terpinene synthase affects chemotype formation in the genus Origanum
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Origanum syriacum (G3LTY3)
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Origanum vulgare (E2E2P0)
brenda
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Identification and characterization of a second isogene encoding alpha-terpinene synthase in Thymus caespititius
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1017-1027
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Thymus caespititius (A0A068EN29)
brenda
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