温带菌体 Latilactobacillus curvatus 的分布,诱导性和特征
Conrad L Ambros1, Matthias A Ehrmann1
1Chair of Microbiology, School of Life Sciences, Technical University Munich (TUM), Freising 85354, Germany.
Microbiome research reports
|December 4, 2023
概括
温和菌体显著影响细菌宿主. 这项研究显示,Latilactobacillus curvatus含有大量的菌体,影响其生长和在食品发酵中的作用.
科学领域:
- 微生物学 微生物学
- 细菌学 细菌学是一门学科.
- 病毒学 病毒学
背景情况:
- 温和菌体对细菌宿主产生积极的影响 (基因转移) 或负面影响 (溶解).
- 曲杆菌 (Latilactobacillus curvatus) 是一种在各种环境中发现的关键肉类初始培养物.
- 了解L. curvatus的prophage动态对于食品发酵至关重要.
研究的目的:
- 调查L. curvatus. 内的菌体的分布和多样性.
- 在L. curvatus基因组中描述完整的prophages及其集成位点.
- 为了分析L. curvatus lysogens.中菌体介导的溶解和病毒的产生.
主要方法:
- 对45个L. curvatus基因组进行查,以检测它们的prophages.
- 完整的prophages及其染色体整合位置的描述.
- 在六种L. curvatus lysogens中诱导prophages,并通过测序和电子显微镜对lysates进行分析.
主要成果:
- 在L. curvatus基因组中检测到206个prophage序列.
- 识别了50个完整的prophages,具有高度的遗传多样性和保存的复制/头尾基因.
- 发现了12个整合位点,主要是tRNA基因,并观察了 lysogens 中的菌株依赖溶解.
结论:
- L. curvatus对 (亲) 菌非常敏感,它有多个完好无损的亲菌和遗骸.
- 这项研究为研究食物发酵中的菌体与宿主相互作用提供了基础知识.
- 洞察到prophage内容可以优化L.curvatus的初始培养.
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