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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/21728


    標題: Identification and characterization of the asperthecin gene cluster of Aspergillus nidulans
    作者: Edyta Szewczyk
    Yi-Ming Chiang
    Elizabeth Oakley
    Ashley D. Davidson
    Clay C. C. Wang
    Berl R. Oakley
    貢獻者: 藥物科技研究所
    日期: 2008-10
    上傳時間: 2009-10-13 09:29:32 (UTC+8)
    出版者: Amer Soc Microbiology
    摘要: The sequencing of Aspergillus genomes has revealed that the products of a large number of secondary metabolism pathways have not yet been identified. This is probably because many secondary metabolite gene clusters are not expressed under normal laboratory culture conditions. It is, therefore, important to discover conditions or regulatory factors that can induce the expression of these genes. We report that the deletion of sumO, the gene that encodes the small ubiquitin-like protein SUMO in A. nidulans, caused a dramatic increase in the production of the secondary metabolite asperthecin and a decrease in the synthesis of austinol/dehydroaustinol and sterigmatocystin. The overproduction of asperthecin in the sumO deletion mutant has allowed us, through a series of targeted deletions, to identify the genes required for asperthecin synthesis. The asperthecin biosynthesis genes are clustered and include genes encoding an iterative type I polyketide synthase, a hydrolase, and a monooxygenase. The identification of these genes allows us to propose a biosynthetic pathway for asperthecin.
    Appears in Collections:[藥學系(所)] 期刊論文

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