Organic Letters 2011-May
Triterpene cyclases from Oryza sativa L.: cycloartenol, parkeol and achilleol B synthases.
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The gene products of AK121211, AK066327, and AK070534 from Oryza sativa encode cycloartenol, parkeol, and achilleol B synthases, respectively. Parkeol synthase is a unique enzyme that affords parkeol as a single product. Achilleol B synthase is the third seco-type triterpene cyclase identified to date, and triterpenes produced by this synthase include achilleol B (90%), tetracyclic (5.12%) and pentacyclic scaffolds (4.37%), and unidentified triterpenes (0.51%). The pathway for achilleol B biosynthesis is proposed.
