在定义的肠道微生物群体中,对基因组逆变体的全面分析揭示了与肠道殖民和表面粘附的关联
Xiaofan Jin1,2, Alice G Cheng3,4, Rachael B Chanin5
1Gladstone Institutes, San Francisco, USA.
Microbiome
|March 10, 2025
概括
细菌使用invertons,移动DNA元素,以适应. 这项研究表明,肠道细菌中的反转子活动受到表面粘附和肠道殖民的影响,揭示了新的遗传适应机制.
科学领域:
- 微生物学 微生物学
- 遗传学 遗传学 是一个
- 生物信息学是一种生物信息学.
背景情况:
- 细菌利用可逆的遗传元素,称为invertons,以实现种群异质性和环境适应.
- 在人类肠道细菌中,逆转子经常位于参与细胞表面修饰的基因附近,这表明它们在粘附和殖民中的作用.
- 在像人类肠道微生物群这样的复杂社区中研究反转子动态是具有挑战性的,由于读取对齐,元基因组测序的准确性受到限制.
研究的目的:
- 开发和应用生物信息工作流程,以准确识别和跟踪元基因组数据中的反转子.
- 研究人类肠道微生物组中逆变体动态,环境条件和细菌适应之间的关系.
- 识别与逆变子介导过程相关的基因和调节元件.
主要方法:
- 开发了PhaseFinderDC,这是一个定制的生物信息工作流程,用于分析元基因组数据中的反转子.
- 在不同的生长条件下 (体外和体内) 应用PhaseFinderDC到来自复杂肠道社区 (hCom2) 的元基因组样本.
- 利用图案丰富来识别假定的促进子区域和候选逆转酶基因.
主要成果:
- 在大多数hCom2菌株中检测到逆转子,其方向概率随着时间的推移而变化,并与环境条件相关.
- 确定了与肠道殖民和表面粘附过程统计学相关的逆转子.
- 发现的候选逆转子可能会调节特定的逆转子翻转事件.
结论:
- 细菌表面粘附和肠道殖民动态直接影响复杂的肠道社区中的反转子活动.
- 逆转动力学在细菌适应和殖民的基因机制中发挥着重要作用.
- 这项研究为人类肠道微生物组中inverton的功能性作用提供了新的见解.
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