在Shouchella clausii中开发一种高效率,无标记和代基因组编辑工具
Claudia Cappella1, Carsten Jers2, Lorenzo Ninivaggi3
1Department of Biosciences, Biotechnologies and Environment, University of Bari "Aldo Moro", Bari, Italy.
Microbial biotechnology
|February 9, 2026
概括
研究人员开发了一种新的遗传工具,用于转化具有工业潜力的细菌Shouchella clausii. 该系统能够精确编辑基因组,克服以前的局限性,为先进的合成生物学应用铺平道路.
科学领域:
- 微生物学 微生物学
- 合成生物学 合成生物学
- 生物技术是生物技术.
背景情况:
- 克劳西菌 (Shouchella clausii) 具有固有的抗生素耐药性,并有可能用于生物治疗和工业应用.
- 由于其刚性细胞壁和缺乏自然能力,对S. clausii的基因操纵具有挑战性,这阻碍了其作为微生物底盘的使用.
- 现有的遗传工具不足以有效地对S. clausii等反抗性细菌进行基因组工程.
研究的目的:
- 开发一种通用且可重复使用的基因工具,用于在Shouchella clausii.中进行高效的基因转换和基因组编辑.
- 通过优化电穿孔和创建兼容的穿载体来克服S. clausii的遗传固性.
- 为了证明开发的系统对于精确的,无痕迹的基因组修饰在格拉姆阳性细菌中的广泛适用性.
主要方法:
- 优化了用细胞壁削弱剂进行超的电解协议,以增强S. clausii的转化.
- 设计了一种温度敏感的大肠杆菌-S. clausii穿载体 (pM4B522),用于金门组装,具有抗谱素和RFP报告员的特点.
- 实施了无标记基因组编辑的两步弹出/弹出整合策略,包括无痕点突变和基因替换.
主要成果:
- 实现了与其他反抗性细菌相比的电穿孔效率.
- 在S. clausii中成功证明了顺序,无标记的基因删除 (xylA,lacA),成功率>60%.
- 展示了精确的基因组编辑能力,包括基因替代 (lacA与gfp) 和S. clausii和Bacillus subtilis的无痕点突变发生.
结论:
- 开发的遗传工具和优化的电解协议显著提高了Shouchella clausii的遗传处理能力.
- 该系统的多功能性和无的编辑能力使其适合开发下一代益生菌和推进合成生物学.
- 这一平台对包括Bacillus subtilis在内的各种格拉姆阳性细菌的基因组工程具有广泛的适用性.
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