对Bifidobacterium adolescentis的基因组演变的评估表明,它是对人类肠道的遗传适应
Emanuele Selleri1, Chiara Tarracchini1, Silvia Petraro1
1Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy.
mSystems
|February 6, 2026
概括
Bifidobacterium adolescentis是一种常见的肠道细菌,使用1682个基因组进行了广泛的研究. 研究人员确定了独特的基因和水平基因转移,揭示了它在微生物相互作用和地理差异化中的作用.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 人类肠道微生物群
背景情况:
- Bifidobacterium adolescentis 在成年人肠道微生物群中非常普遍 (大约. 这一比例是60%).
- 由于缺乏足够的表征,对其生理特征,遗传多样性和相互作用的理解有限.
- 这项研究旨在全面探索B. adolescentis. 的遗传多样性.
研究的目的:
- 为了发现B. adolescentis.独特的遗传特征.
- 研究区分B. adolescentis与其他与人类相关的Bifidobacterium物种的遗传特征.
- 了解B. adolescentis在肠道微生物网络中的作用.
主要方法:
- 从公共数据和元基因组组合中编制了1682个B. adolescentis基因组的数据集.
- 进行了泛基因组分析,以识别正义基因集群.
- 对超过10,000个人类肠道转基因组进行了基因组学分析和大规模的转基因组学分析.
主要成果:
- 确定了203个B. adolescentis独特的正统基因集群,其中6个预计具有独特的功能.
- 发现了2597个通过横向基因转移获得的基因,包括宿主相互作用和菌体防御的基因.
- 揭示了与地理起源和与36个有益的种类共同存在相关的七个遗传群集.
结论:
- B. adolescentis具有独特的遗传特征和由水平基因转移塑造的动态基因组.
- 遗传学差异化表明地理因素对菌株进化产生影响.
- B. adolescentis在成年肠道微生物网络中发挥着重要作用,与有益的共生动物相互作用.
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