一种新型的转录抑制剂专门调节了Trichoderma reesei中的西兰酶基因1
Wenqiang Xu1,2, Yajing Ren1, Yuxiao Xia1
1State Key Laboratory of Microbial Technology, Shandong University, No.72 Binhai Road, Qingdao, 266237, People's Republic of China.
Biotechnology for biofuels and bioproducts
|October 27, 2023
概括
研究人员确定了XTR1,这是一种新型的转录因子,可以抑制Trichoderma reesei中的西兰酶基因表达. 它的去除可使西兰酶的产生增加50%,为工业应变工程提供了洞察力.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 工业微生物学 工业微生物学
背景情况:
- 特里科德尔马·里西 (Trichoderma reesei) 是一种重要的工业真菌,用于生产纤维酶和西兰酶.
- 克西兰酶基因表达在转录上受到严格调节,但其调节机制比细胞酶基因了解得更少.
- 对西兰酶调节的有限理解阻碍了提高生产效率的应变工程.
研究的目的:
- 确定新型的转录因子,调节T. reesei.中的西兰酶基因表达.
- 阐明已识别的因素在西兰酶生物合成中的功能和调节作用.
- 为提高工业菌株的西兰酶生产提供目标.
主要方法:
- 使用xyn1和xyn2促进体进行酵母单杂交 (Y1H) 查.
- 基因删除和转录水平的分析.
- 酶活性测试用于西兰酶和细胞酶.
- 使用GFP融合的亚细胞局部化研究.
- 电泳运动移动性转换试验 (EMSA).
主要成果:
- 一种新型的转录因子XTR1被鉴定为具有与xyn1促进体的特定结合.
- 删除XTR1显著增加了xyn1转录和总体xylanase活性约50%.
- 证实XTR1是一种核蛋白,与交易激活器XYR1竞争促进体结合,作为抑制剂.
结论:
- XTR1是一种新型的转录抑制剂,专门控制T. reesei.中的西兰酶基因表达.
- 了解XTR1的作用可以增强对西兰酶基因调节网络的了解.
- 这一发现为工程T. reesei提供了关键的见解,以促进西兰酶的生产.
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