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对于Streptomyces的单一副本光遗传系统
Airi Watanabe1, Ryuta Noya1, Rio Yamada1
1Life Science Research Center, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, 252-0880, Japan.
Scientific reports
|December 15, 2025
概括
科学家们开发了一种新的光诱导基因表达系统 (iLiEX),用于Streptomyces细菌. 该系统可以使用蓝绿光精确控制蛋白质的生产,比现有方法具有显著的优势.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- LitR是一种蓝绿色光感应的转录调节器,利用协酶B12.
- 杆菌物种是重要的格拉姆阳性细菌,其中S. griseus以杆菌素的生产而闻名.
研究的目的:
- 在Streptomyces griseus.中开发一个基因组整合,光感应表达 (iLiEX) 系统.
- 为了使Streptomyces中精确的,光控制的蛋白质过量产生.
主要方法:
- 在Streptomyces基因组中整合Litr,T7RNA聚合酶和血清酶整合.
- 优化T7RNA聚合酶的核糖体结合部位,并引入T7溶酶.
- 修改T7促进体长度以提高多功能性.
主要成果:
- 实现了依赖光的甲基醇-2,3-二氧化酶和GUS的过度产生,GUS活性比erME*促进剂高39倍.
- 在多个Streptomyces物种 (S. coelicolor,S. lividans,S. albus,S. avermitilis) 中表现出功能.
- 成功可视化了光蛋白,染色蛋白和色素合成酶的光诱导过度表达.
结论:
- 开发的iLiEX系统是一种多功能,单复制,光感应的过度表达工具,用于Streptomyces.
- 该系统允许高水平生产各种蛋白质,包括分泌的酶,如乳糖酶和转胺酶.
- iLiEX在各种Streptomyces物种中提供了广泛的适用性,用于控制基因表达.
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