The enzyme has been characterized from Dysphania ambrosioides (American wormseed). Requires Mg2+. Mn2+ is less effective. The enzyme will also use (3R)-linalyl diphosphate. The reaction involves a 1,2-hydride shift. The 1-pro-S hydrogen of geranyl diphosphate is lost.
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The enzyme appears in viruses and cellular organisms
The enzyme has been characterized from Dysphania ambrosioides (American wormseed). Requires Mg2+. Mn2+ is less effective. The enzyme will also use (3R)-linalyl diphosphate. The reaction involves a 1,2-hydride shift. The 1-pro-S hydrogen of geranyl diphosphate is lost.
required, enzyme CoTPS1 has the conserved aspartate-rich motif (DDXXD) and NSE/DTE motifs that chelate divalent metal ions, typically Mg2+, in the C-terminal domain
the enzyme belongs to the terpene sythase superfamily, subfamily TPS-b. The arginine-tryptophan motif, R(R)X8W, present at the N terminus of most mono-TPS and in some sesqui-TPS and di-TPS, is found in CoTPS1, and CoTPS1 contains a putative N-terminal plastid Tp sequence of 41 amino acids
the enzyme is part of the biosynthesis of volatile organic compounds (VOCs) in flowers. Floral scents are a key factor in plant-insect interactions and are vital for successful pollination. The scented flowers of Cananga odorata var. fruticosa are analysed by GC-MS and a total of 49 VOCs are identified at four different stages of flower development. The bulk of these VOCs are terpenes, mainly sesquiterpenes. Enzyme CoTPS1 synthesizes four products corresponding to beta-thujene, sabinene, beta-pinene, and -alpha from geranyl diphosphate
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CLONED/commentary
ORGANISM
UNIPROT
LITERATURE
gene TPS1, sequence comparisons and phylogenetic analysis and tree, quantitative real-time PCR enzyme expression analysis, recombinant expression of His-tagged enzyme in Escherichia coli strain BL21(DE3)pLysS, recombinant expression of YFP-tagged enzyme containing the N-terminal plastid Tp sequence in Nicotiana benthamiana leaf chloroplasts under control of CaMV 35S promoter via transformation method with Agrobacterium tumefaciens strain GV3101
The floral transcriptome of ylang ylang (Cananga odorata var. fruticosa) uncovers biosynthetic pathways for volatile organic compounds and a multifunctional and novel sesquiterpene synthase
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4.2.3.115 alpha-terpinene synthase
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