通过调节Hfq表达来调节基因表达的调节,与Escherichia coli的定制的sRNA-based knockdown协调
Yu Jung Jung1, Keun Ha Park1, Tae Yeong Jang1
1School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea.
Journal of biotechnology
|April 14, 2024
概括
我们通过调节Hfq蛋白水平来增强合成小RNA (sRNA) 基因淘汰系统. 这改善了基因抑制,并显著提高了微生物生产的有价值的化合物,如5-氨基诺氨酸和L-氨酸.
科学领域:
- 合成生物学 合成生物学
- 微生物生物技术 微生物生物技术
- 基因调节 基因调节
背景情况:
- 基于合成小RNA (sRNA) 的基因淘汰系统能够精确控制微生物中的基因表达.
- 这些系统的效率可能受到细胞内Hfq蛋白质的可用性所限制,sRNAs为此而竞争.
- 调节Hfq水平对于优化sRNA介导的转录后基因调节至关重要.
研究的目的:
- 提高定制sRNA基因表达调节平台的效率.
- 开发一种基于sRNA的Hfq表达水平调制协调基因淘汰系统.
- 为了提高sRNA的抑制能力和优化生物产品产量.
主要方法:
- 设计了量身定制的sRNA表达录音带,具有不同的Hfq表达水平,使用不同的促进剂强度.
- 使用四种光蛋白评估sRNA抑制能力.
- 将Hfq调节的sRNA系统应用于Escherichia coli菌株,以产生5 - 氨基联酸和L - 铁素.
主要成果:
- 调节Hfq表达水平显著提高了sRNA的抑制能力.
- 在大肠杆菌埃舍里奇亚的应用导致5 - 氨基氨酸的生产增加了74.6%.
- 通过多样化代谢酶表达水平,实现了144%的L-氨酸生产增加.
结论:
- Hfq表达水平调制协调的sRNA系统有效地提高了基因淘汰效率.
- 该系统具有优化生物合成途径中的代谢流量的巨大潜力.
- 将定制合成sRNA与Hfq调制结合在一起是提高生物产品产量的有希望的策略.
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