在PEG8000压力下,通过Trichoderma reesei中的信号调节细胞酶的产生
Shuai Liu1, Lin Quan1, Mei Yang1
1Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400030, China.
Applied microbiology and biotechnology
|January 26, 2024
概括
聚乙烯甘醇8000 (PEG8000) 通过触发信号来增强Trichoderma reesei中的细胞酶生物合成. 这项研究揭示了PEG8000作为增加细胞质生产和基因表达的新型诱导剂.
科学领域:
- 生物技术是生物技术.
- 微生物生理学 微生物生理学
- 酵素工程是什么? 酶工程是什么
背景情况:
- 细胞质生产对于生物质转化至关重要.
- 三虫是工业酶合成的关键有机体.
- 了解细胞酶生物合成的调节机制对于优化至关重要.
研究的目的:
- 为了研究聚乙烯糖醇8000 (PEG8000) 对Trichoderma reesei CICC2626.2的细胞酶生物合成的影响.
- 阐明信号在PEG8000诱导的细胞酶生成中的作用.
- 提出细胞酶基因转录的细胞内调节机制.
主要方法:
- 培养Trichoderma reesei CICC2626与不同度的PEG8000的培养.
- 测试细胞酶活动 (FPase,CMCase,β-葡萄糖酶).
- 测量基因表达,蛋白质度和生物质.
- 转录组分析以确定差异表达的基因.
- 使用 (Ca2+) 抑制剂和基因删除 (crz1) 来评估信号参与.
主要成果:
- 1.5%的PEG8000显著增加了总细胞酶,内葡萄糖酶和β-葡萄糖酶活动的1.3至1.2倍.
- 细胞酶基因的转录水平,蛋白质度和生物质在PEG8000压力下升高.
- 使用T. reesei细胞酶对预处理的米进行协同水解,产生了高度的降解糖.
- 通过PEG8000治疗,12个与林氏纤维素降解相关的基因得到了上调.
- 证实信号传递,特别是通过Crz1通路,在PEG8000诱导的细胞酶基因过度表达中占主导地位.
结论:
- 在Trichoderma reesei中,PEG8000作为增强细胞酶生物合成的有效诱导剂.
- PEG8000诱导细胞质Ca2+爆发,激活信号通路.
- 这些发现确定了PEG8000诱导和信号传导之间的联系,为改善细胞质酶生产提供了一种新的策略.
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