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高分辨率的元基因组组装用于现代的长读取与骨髓瘤
Jim Shaw1,2, Maximillian G Marin1,2, Heng Li1,2
1Department of Data Science, Dana-Farber Cancer Institute.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
一个新的元基因组组装器Myloasm显著改善了使用长读数的复杂微生物组的基因组恢复. 它从牛津纳米孔技术 (ONT) 和PacBio HiFi数据中实现了前所未有的物种内部多样性和抗生素耐药性基因的恢复.
科学领域:
- 微生物组研究的研究.
- 基因组组装的基因组组合
- 生物信息学是一种生物信息学.
背景情况:
- 超基因组组装旨在从微生物群落中完全恢复基因组.
- 超基因组数据的复杂性带来了重要的组装挑战.
- 长读测序技术 (PacBio HiFi,牛津纳米孔技术) 提供了改进组装的潜力.
研究的目的:
- 介绍myloasm,一个为PacBio HiFi和牛津纳米孔技术 (ONT) R10.4长读设计的新型元基因组组装器.
- 提高元基因组组装的准确性和完整性.
- 能够恢复以前无法获得的物种内基因组多样性.
主要方法:
- 开发了myloasm,一个利用多态k-mers进行高分辨率字符串图形构建的元基因组组器.
- 差异丰度用于图表简化的应用.
- 对现实世界ONT和PacBio HiFi元基因组数据集的评估.
主要成果:
- 与现有的组装器相比,Myloasm在ONT元基因组上产生了三倍多的完整圆形结合体.
- 当使用ONT读取时,Myloasm在使用ONT读取时,实现了与HiFi组装器相比或优于HiFi组装器的性能.
- 恢复了六个完整的Prevotella copri*基因组和八个高度相似的TM7 (Saccharibacteria) 结合体.
- 两种非常相似的 *ermF* 抗生素耐药性基因的分辨率与不同的移动遗传元素相关.
结论:
- 米洛亚斯姆显著提升了长时间读取的元基因组组装能力,特别是在ONT数据方面.
- 组装器有助于微生物群落中微细基因组多样性的恢复.
- 骨髓菌提供了一个强大的工具,用于调查微生物社区的结构,功能和抗菌素耐药性的传播.
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