通过Trichoderma reesei Rut C30中的Trbgl1基因淘汰,从玉米中增强葡萄糖-1-酸盐的生产,使用具有降低β-葡萄糖酶活性的纤维素
Xiaoqin Ran1, Yushan Gao1, Xiao He1
1School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China.
Enzyme and microbial technology
|August 29, 2024
概括
研究人员通过准Trbgl1基因,减少了Trichoderma reesei中的β-葡萄糖酶活性. 这一策略增强了基纤维素的水解,用于生产NMN等有价值的化学物质,在使用索酶诱导剂时,减少了细胞酶的产生.
科学领域:
- 生物技术是生物技术.
- 酵素工程是什么意思 酵素工程
- 工业微生物学 工业微生物学
背景情况:
- 纤维酶对于纤维素水解至关重要,但高β-葡萄糖酶活性使控制的纤维素生产复杂化.
- 纤维素是合成高价值化学物质的关键中间体,如NMN,异醇和粉.
研究的目的:
- 为了设计Trichoderma reesei细胞质具有降低β-葡萄糖酶活性.
- 研究β-葡萄糖酶BGL1在细胞酶基因诱导中的作用.
- 优化纤维素酸的水解,以提高有价值化合物的生产.
主要方法:
- 在Trichoderma reesei中对Trbgl1基因进行基因编辑,以减少β-葡萄糖酶活性.
- 使用不同的诱导剂 (乳糖,纤维素,糖) 评估细胞质生产.
- 分析细胞酶基因和酶活性的转录水平.
- 应用复合酶尾酒用于玉米炉水解.
主要成果:
- 通过准Trbgl1.1,实现了超过86%的β-葡萄糖酶活性降低.
- 乳糖或纤维素时细胞酶的产量下降,但在糖时保持稳定.
- 鉴定了索福洛斯作为一种有效的诱导剂,由β-葡萄糖酶BGL1的转糖化活性介导.
- 使用工程酶尾酒的玉米炉水解产生了24.3%的葡萄糖-1-酸盐增加.
结论:
- 向Trbgl1提供了一种控制Trichoderma reesei中的β-葡萄糖酶活性的方法.
- 苏是细胞酶生产的优质诱导剂,绕过了高β-葡萄糖酶活性的需要.
- 开发的酶系统增强了用于生产高价值化学品的树脂纤维素价值化.
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