自解素作为Clostridium perfringens的细胞表面上的纤维素受体
Riyo Aono1, Shogo Emi2, Kanako Okabe-Watanabe3
1Department of Material Science, School of Science, Faculty of Science, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama-shi, Okayama, 700-0005, Japan.
Anaerobe
|August 6, 2023
概括
克洛斯特里透的自溶素 (Acp) 与纤维素 (Fn) 结合,调解细菌的粘附. 这项研究确定Acp是C. perfringens上的关键Fn受体,对原结合和感染至关重要.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 传染性疾病 传染性疾病
背景情况:
- 杆菌是一种致病原体,会引起食物中毒和气体.
- 细菌对宿主组织的粘附,如通过纤维菌素 (Fn) 形成的原,对于感染至关重要.
- 在此之前,C. perfringens autolysin (Acp) 在纤维素结合中的作用尚不清楚.
研究的目的:
- 为了研究C. perfringens自溶素 (Acp) 在与细菌细胞结合的纤维素 (Fn) 中的参与.
- 为了确定Acp是否在C. perfringens的表面起到纤维素蛋白受体的作用.
主要方法:
- 使用了复合Acp片段和人类纤维菌素 (Fn).
- 采用了C. perfringens的淘汰突变 (acp::erm和ΔfbpC ΔfbpD).使用了C. perfringens的淘汰突变.
- 进行了连接体涂抹,西部涂抹,补充试验和ELISA来评估Fn结合活性.
主要成果:
- 发现纤维素 (Fn) 与重组Acp.的催化域结合.
- 在Acp缺陷突变者中,Fn与C. perfringens细胞的结合显著降低.
- 对acp基因的补充恢复了Fn结合活性.
- 已知的Fn结合蛋白FbpC和FbpD没有参与Fn与C. perfringens细胞的结合.
结论:
- 自律素 (Acp) 被认为是一种纤维素结合蛋白.
- 在C. perfringens. 表面,ACp作为纤维素蛋白受体起作用.
- 这一发现阐明了C. perfringens粘附于宿主组织的关键机制.
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