全长16S rRNA基因测序通过PacBio改善了人类微生物样本的分类分辨率
Elena Buetas1, Marta Jordán-López2, Andrés López-Roldán2
1Genomics & Health Department, FISABIO Foundation, Valencia, Spain.
BMC genomics
|March 26, 2024
概括
与Illumina相比,PacBio的第三代测序在人类微生物组研究中为16SrRNA基因分析提供了更高的物种级分辨率. 虽然这两种平台都提供了可比的基因级数据,但PacBio提高了分类学准确性,以更深入地了解微生物群落.
科学领域:
- 微生物组研究 微生物组研究
- 基因组测序技术的技术
- 细菌的分类学 细菌的分类学
背景情况:
- 16S rRNA基因变量区域的Illumina短读测序是人类微生物群研究的标准.
- 简短的阅读限制了物种层面的差异化,这对于理解与健康相关的与疾病相关的微生物至关重要.
- 第三代测序,如PacBio SMRT,提供了更长的读数,用于完全的16S rRNA基因测序和更高的分类分辨率.
研究的目的:
- 为了比较16S rRNA基因的Illumina短读和PacBio长读测序的测序输出和分类学注释性能.
- 评估每个平台在各种人类微生物样本中识别微生物物种的能力.
主要方法:
- 从人类唾液,口腔生物膜和9名志愿者的便中分离DNA.
- 16S rRNA基因区域的放大和测序 (V3-V4由Illumina,V1-V9由PacBio).
- 阅读分配百分比在属和物种层面和总体细菌组成的比较.
主要成果:
- 无论是Illumina还是PacBio都实现了类似的属级别分配 (94.79%与95.06%对比).
- 在PacBio中,表现出更高的物种级别分配率 (74.14%对比55.23%).
- 细菌组成按样本利基聚类,而不是测序平台;所有丰富的属被两者检测到.
结论:
- 在人类微生物组研究中,Illumina和PacBio测序的结果在很大程度上是可比的.
- PacBio提供了卓越的物种级分类分辨率,支持其用于详细的微生物组分析.
- 对于未来的微生物组研究来说,PacBio技术是值得推的,尽管当前对相当数量的读数的成本较高.
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