在全球分布的呼吸道内共生生物中,有氧呼吸和脱的遗传潜力
Daan R Speth1,2, Linus M Zeller3, Jon S Graf3
1Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Bremen, Germany. daan.speth@univie.ac.at.
Nature communications
|November 8, 2024
概括
这项研究揭示了呼吸系统内共生生物,Candidatus Azoamicus ciliaticola,在全球广泛分布. 这些细菌为无氧纤维细胞提供ATP,像线粒体一样起作用,扩大已知的呼吸系统共生范围.
科学领域:
- 微生物真核生物进化过程
- 交生研究 交生研究
- 基因组学和生物信息学
背景情况:
- 之前曾提出,内生生物Candidatus Azoamicus ciliaticola可以为其无氧的纤维状宿主提供ATP.
- 这种呼吸系统内共生对微生物真核生物进化和生态有重大影响.
- 关于这种内生生体的环境分布和多样性的数据有限.
研究的目的:
- 研究呼吸道内生生物的环境分布和多样性.
- 为了对这些内生生物体内的关键蛋白质复合体进行进化分析.
- 扩大对微生物真核生物的呼吸系统共生的理解.
主要方法:
- 获取和分析四个完整的,圆形的元基因组组装基因组 (cMAGs).
- 从加利福尼亚,俄俄州和德国的地下水样本中对内共生生物的基因组分析.
- 遗传学分析以确定内共生生物的进化位置.
主要成果:
- 四个代表呼吸道内共生生物的cMAG从全球各种地下水地点获得.
- 这些内共生生物属于 UBA6186.6 gamma-proteobacterial 序列中的两个系.
- 所有分析的内共生体都具有细胞染色体cbb3氧化酶,表明有氧呼吸能力.
结论:
- 呼吸系统内共生体Candidatus Azoamicus ciliaticola在全球分布在各种息地.
- 细胞染色体cbb3氧化酶的存在证实了它们的有氧呼吸能力.
- 这项研究显著扩大了已知的呼吸系统共生生态范围.
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