Isolation of hydroxycitric acid-producing Streptomyces sp. U121 and generation of improved mutants by genome shuffling

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Hydroxycitric acid (HCA) is the principal acid produced by the tropical and subtropical plants <I>Garcinia cambogia</I> and <I>Hibiscus subdariffa</I>. The stereochemistry and biological activities of HCA have been well studied because it is used as a food additive and dietary supplement. Here we review current knowledge on the structure, biological occurrence, physiological activities and microbial production of HCA. Since stereoselective organic synthesis is difficult, and the habitat of the source plants is restricted, the availability of HCA is limited. Hence, we screened microorganisms to supply an alternative source and identified a species of <I>Streptomyces</I> that produces trace amounts of the <I>Hibiscus</I>-type HCA enantiomer. Subsequently, genome shuffling was applied to improve HCA production by the strain. Finally, we obtained improved strains that produce five times more HCA than the parent strain. In combination with a selective screening system, genome shuffling can be used to rapidly improve the production of secondary metabolites by <I>Streptomyces</I> species. Furthermore, genome-wide studies could be used to identify various critical mutations and provide new insights into the cellular regulation of the secondary metabolism of <I>Streptomyces</I> in the near future.

収録刊行物

  • 日本放線菌学会誌  

    日本放線菌学会誌 21(1), 40-45, 2007-06-25 

    The Society for Actinomycetes Japan

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各種コード

  • NII論文ID(NAID)
    10018921077
  • NII書誌ID(NCID)
    AN10080091
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    09145818
  • NDL 記事登録ID
    8882201
  • NDL 雑誌分類
    ZR5(科学技術--生物学--菌類・微生物)
  • NDL 請求記号
    Z18-1070
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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