开发一种条件等离子体,用于非模型菌株Fusobacterium nucleatum的基因删除
Peng Zhou1, Bibek G C1, Chenggang Wu1
1Department of Microbiology & Molecular Genetics, The University of Texas Health Science Center at Houston, Houston, Texas, USA.
Applied and environmental microbiology
|January 24, 2025
概括
一个新的条件等离子体系统使得在具有遗传挑战性的Fusobacterium nucleatum菌株中能够进行基因删除. 这一进步有助于理解这种机会性病原体在不同亚种中的多样性疾病潜力.
科学领域:
- 微生物学 微生物学
- 细菌遗传学 细菌遗传学
- 病原体研究 病原体研究
背景情况:
- 核菌 (Fusobacterium nucleatum) 是一种机会性病原体,具有不同的亚种和疾病潜力.
- 对非模型菌株的有限研究阻碍了对F. nucleatum病变的理解.
- 许多F. nucleatum菌株的低转化效率使遗传操纵复杂化.
研究的目的:
- 开发一种新型的条件等离子体系统,以有效地删除遗传反抗性F. nucleatum菌株中的基因.
- 为了使不同的F. nucleatum亚种和相关物种进行基因研究.
- 研究特定基因 (如radD) 在F. nucleatum病毒性和相互作用中的作用.
主要方法:
- 开发了一个有条件的等离子体系统,具有可诱导的RepA蛋白质,由fdx促进器和神素响应的 рибо开关控制.
- 使用同源重组和抗生素选择 (thiamphenicol) 在诱导物被移除后进行染色体整合.
- 包含一个sacB反选择标记,用于非模型菌株的基因删除,通过准galK和radD基因进行验证.
主要成果:
- 在FNN (ATCC 23726,CTI-2),FNP (ATCC 10953),FNA (21_1A) 和Fusobacterium periodonticum.um中成功生成了基因删除突变体.
- radD删除取消了与Actinomyces oris在ATCC 23726,ATCC 10953和21_1A.菌株中的联合聚合.
- 在FNN菌株CTI-2突变中保留了凝聚能力,这表明涉及替代粘合素.
结论:
- 开发的条件等离子体系统显著提高了多样化和具有遗传挑战性的F. nucleatum菌株的基因删除能力.
- 这些发现突显了F. nucleatum内部的遗传和表型多样性,强调了对菌株特定研究的需要.
- 该工具为深入研究F. nucleatum病毒性因素和宿主相互作用提供了基础.
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