標題: Identification of the mokH Gene Encoding Transcription Factor for the Upregulation of Monacolin K Biosynthesis in Monascus pilosus
作者: Chen, Yi-Pei
Yuan, Gwo-Fang
Hsieh, Sung-Yuan
Lin, Yu-Shan
Wang, Wei-Yi
Liaw, Li-Ling
Tseng, Ching-Ping
生醫工程研究所
Institute of Biomedical Engineering
關鍵字: Monacolin K;Monascus pilosus;transcription factor;glyceraldehyde-3-phosphate dehydrogenase
公開日期: 13-一月-2010
摘要: Monacolin K is a secondary metabolite synthesized by polyketide synthases (PKS) from Monascus. The monacolin K biosynthetic gene cluster, mokA-mokI, has been characterized in Monascus pilosus. The mokH gene encoding Zn(II)2Cys6 binuclear DNA binding protein is assumed to be an activator for monacolin K production. In this study, the mokH gene was cloned and driven by the glyceraldehyde-3-phosphate dehydrogenase (gpd) promoter for overexpression in M. pilosus. The transformants containing an extra copy of the mokH gene were obtained and verified by PCR and Southern hybridization. The transcripts of mokH in the transformants were expressed significantly higher than those of the wild-type strain. The transformants were stably inherited through the next generation, as determined by observation of the enhanced green fluorescent protein (EGFP). The transformant T-mokH1 also showed a 1.7-fold higher production of monacolin K than the wild-type strain in a time course analysis. Analysis of the RT-PCR products demonstrated that the monacolin K biosynthetic genes in the transformant were expressed to a greater extent than those in the wildtype strain. These results indicated that mokH upregulated the transcription of monacolin K biosynthetic genes and increased monacolin K production.
URI: http://dx.doi.org/10.1021/jf903139x
http://hdl.handle.net/11536/5976
ISSN: 0021-8561
DOI: 10.1021/jf903139x
期刊: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume: 58
Issue: 1
起始頁: 287
結束頁: 293
顯示於類別:期刊論文


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