一个多功能等离子体系统用于转化控制和分泌的重组蛋白质在菌根菌中
Victor Gigante Pereira1, Paloma Rezende Corrêa1, Rodrigo Martins Barros1
1Laboratório de Biologia Molecular Aplicada à Micobactérias, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Rio de Janeiro 21040-900, Brazil.
ACS synthetic biology
|January 21, 2026
概括
我们设计了一种新的系统,通过将翻译和分泌联系起来,控制菌根菌中的蛋白质生产. 这种方法增强异质蛋白质的分泌,并扩大了Mycobacterium研究的遗传工具.
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:
- 菌根菌在重组蛋白质生产中存在挑战,原因是有限的诱导表达系统和低效的分泌.
- 开发精确控制蛋白质表达和出口对于推进涉及菌根菌的研究和应用至关重要.
研究的目的:
- 开发基于等离子体的系统,用于*Mycobacterium smegmatis*中的翻译门分泌.
- 为了配对与有效的细胞外蛋白质输出,带有核糖开关介导的翻译控制.
- 扩大用于菌根细菌研究和应用的遗传工具包.
主要方法:
- 集成的 *M.结核病* 抗原85A促进剂和信号与合成的 рибо开关 (对神素敏感和对温度敏感).
- 利用mCherry作为记者蛋白来评估翻译控制和分泌效率.
- 采用光测试,RT-PCR和西式涂抹来验证系统的性能.
主要成果:
- 证明有效的分泌,与细胞内部分相比,细胞外蛋白水平高10-20倍.
- 确认了严格的翻译调节,无论诱导如何,都能检测到副本.
- 素诱导系统显示了剂量依赖的反应,而温度敏感的变体显示了明确的开/关开关.
- 最佳的诱导发生在早期和中期日志生长阶段.
结论:
- 确立了翻译关闭的分泌物作为一种用于菌根细菌蛋白质生产的新型控制机制.
- 开发的模块化平台为研究菌根细菌抗原和毒性因子提供了增强的遗传工具.
- 潜在的应用包括结构生物学,疫苗开发和对缓慢生长的病原体的药物标验证.
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