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针对酵母体的动态基因调节的定制UPRE2变体
Chufan Xiao1, Xiufang Liu1, Yuyang Pan1
1School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China.
概括
研究人员为合成生物学设计了新的遗传元素,增强了酵母中的基因调节. 这些改进的未折叠蛋白反应元件 (UPREs) 促进了有价值的化学物质和蛋白质的生产.
科学领域:
- 合成生物学 合成生物学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 在合成生物学中,遗传元素对于编程宿主细胞至关重要.
- 展开的蛋白质响应 (UPR) 途径,涉及Hac1和展开的蛋白质响应元素 (UPREs),维护内质网膜 (ER) 稳态.
研究的目的:
- 为基因调节开发具有增强反应能力和动态范围的新型遗传元素.
- 研究Hac1与UPRE元素之间的相互作用机制.
主要方法:
- 创建和选一个UPRE2突变物 (UPRE2m) 库.
- 分子建模和位点定向突变发生,以确定Hac1.1.中的关键DNA结合残留物.
- 评估Hac1和UPRE2m之间的结合亲和力.
主要成果:
- 鉴定出具有显著增强反应能力的强有力的UPRE2m元素,如m84 (3.72x比原生UPRE2更高的活性).
- 证明UPRE2m元素是多功能且与各种促销器兼容的.
- 确定了Lys60在Hac1中对DNA结合至关重要,并证实了UPRE2m对Hac1.1的更高的结合亲和力.
- 使用UPRE2m进行基因调节,展示了增强的重组蛋白和天然产品合成.
结论:
- 开发出高度响应的遗传元素 (UPRE2m) 用于在酵母中动态控制基因表达.
- 阐明了Hac1-UPRE相互作用的分子机制,揭示了增强的结合亲和力.
- 证明了UPRE2m在改善细胞生产有价值化合物的实际应用.
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