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  • Title: Herboxidiene biosynthesis, production, and structural modifications: prospect for hybrids with related polyketide.
    Author: Pokhrel AR, Dhakal D, Jha AK, Sohng JK.
    Journal: Appl Microbiol Biotechnol; 2015 Oct; 99(20):8351-62. PubMed ID: 26286508.
    Abstract:
    Herboxidiene is a polyketide with a diverse range of activities, including herbicidal, anti-cholesterol, and pre-mRNA splicing inhibitory effects. Thus, production of the compound on the industrial scale is in high demand, and various rational metabolic engineering approaches have been employed to enhance the yield. Directing the precursors and cofactors pool toward the production of polyketide compounds provides a rationale for developing a good host for polyketide production. Due to multiple promising biological activities, the production of a number of herboxidiene derivatives has been attempted in recent years in a search for the key to improve its potency and to introduce new activities. Structural diversification through combinatorial biosynthesis was attempted, utilizing the heterologous expression of substrate-flexible glucosyltransferase (GT) and cytochrome P450 in Streptomyces chromofuscus to generate structurally and functionally diverse derivatives of herboxidiene. The successful attempt confirmed that the strain was amenable to heterologous expression of foreign polyketide synthase (PKS) or post-PKS modification genes, providing the foundation for generating novel or hybrid polyketides.
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