A copper-responsive promoter replacement system to investigate gene functions in Trichoderma reesei: a case study in characterizing SAGA genes
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- 作者：Fanglin Zheng ; Yanli Cao ; Xinxing Lv ; Lei Wang…
- 关键词：tcu1 ; Gcn5 ; Ada2 ; Cellulase ; Trichoderma reesei
- 刊名：Applied Microbiology and Biotechnology
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：101
- 期：5
- 页码：2067-2078
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Microbiology; Microbial Genetics and Genomics; Biotechnology;
- 出版者：Springer Berlin Heidelberg
- ISSN：1432-0614
- 卷排序：101
文摘
Trichoderma reesei represents an important workhorse for industrial production of cellulases as well as other proteins. The molecular mechanism underlying the regulation of cellulase production as well as other physiological processes in T. reesei is still insufficiently understood. We constructed a Ptcu1-based promoter substitution cassette that allowed one-step replacement of the endogenous promoter for controlling the target gene expression with copper. We then showed that copper repression of the histone acetyltransferase gene gcn5 phenocopied the gcn5 deletion strain. Using the same strategy, we further characterized the function of another putative Spt-Ada-Gcn5 acetyltransferase (SAGA) complex subunit encoding gene, ada2, in T. reesei. Similar to the repression of gcn5, the addition of copper to the Ptcu1-ada2 strain not only drastically reduced the vegetative growth and conidiation in T. reesei but also severely compromised the induced cellulase gene expression. The developed strategy will thus be potentially useful to probe the biological function of the large fraction of T. reesei genes with unknown functions including those essential genes in the genome to expand its extraordinary biotechnological potential.