The polyketide components of waxes and the Cer-cqu gene cluster encoding a novel polyketide synthase, the β-diketone synthase, DKS

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The primary function of the outermost, lipophilic layer of plant aerial surfaces, called the cuticle, is preventing non-stomatal water loss. Its exterior surface is often decorated with wax crystals, imparting a blue-grey color. Identification of the barley Cer-c, -q and -u genes forming the 101 kb Cer-cqu gene cluster encoding a novel polyketide synthase-the β-diketone synthase (DKS), a lipase/carboxyl transferase, and a P450 hydroxylase, respectively, establishes a new, major pathway for the synthesis of plant waxes. The major product is a β-diketone (14,16-hentriacontane) aliphatic that forms long, thin crystalline tubes. A pathway branch leads to the formation of esterified alkan-2-ols.

Original languageEnglish
Article number28
JournalPlants
Volume6
Issue number3
Number of pages18
ISSN2223-7747
DOIs
Publication statusPublished - Sep 2017

    Research areas

  • Cer-cqu gene cluster, Cytochrome P450, Diketone synthase (DKS), Esterified alkan-2-ols, Hydroxy-β-diketones, Lipase/carboxyl esterase/thioesterase, Plant waxes, Type III polyketide synthase (PKS), β-diketones

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ID: 184070080