新方法可完成高精度長讀擴增子測序
作者:
小柯機器人發布時間:2021/1/12 16:40:51
丹麥奧爾堡大學Mads Albertsen研究團隊近日取得一項新成果。經過不懈努力,他們使用Nanopore或PacBio測序的獨特分子標識技術完成了高精度長讀擴增子測序。
在本研究中,研究人員開發了一種高通量擴增子測序方法,該方法結合了獨特分子標識(UMI)與牛津納米孔技術(ONT)或Pacific Biosciences環形共有序列,可獲得宏基因組區域內高精度單分子共有序列。研究人員將該方法應用於模式微生物群落核糖體RNA操縱子的擴增子(?4,500 bp)和基因組序列(> 10,000 bp)中,觀察到嵌合率<0.02%。要達到平均UMI共識錯誤率<0.01%,需要UMI讀取覆蓋率為15倍(ONT R10.3)、25倍(ONT R9.4.1)和3倍(Pacific Biosciences環形共識測序), 其對應的平均錯誤率為0.0042%、0.0041%和0.0007%。
據悉,相比於短讀測序技術,針對宏基因組區域的高通量擴增子測序仍具有挑戰性。
附:英文原文
Title: High-accuracy long-read amplicon sequences using unique molecular identifiers with Nanopore or PacBio sequencing
Author: Sren M. Karst, Ryan M. Ziels, Rasmus H. Kirkegaard, Emil A. Srensen, Daniel McDonald, Qiyun Zhu, Rob Knight, Mads Albertsen
Issue&Volume: 2021-01-11
Abstract: High-throughput amplicon sequencing of large genomic regions remains challenging for short-read technologies. Here, we report a high-throughput amplicon sequencing approach combining unique molecular identifiers (UMIs) with Oxford Nanopore Technologies (ONT) or Pacific Biosciences circular consensus sequencing, yielding high-accuracy single-molecule consensus sequences of large genomic regions. We applied our approach to sequence ribosomal RNA operon amplicons (~4,500bp) and genomic sequences (>10,000bp) of reference microbial communities in which we observed a chimera rate <0.02%. To reach a mean UMI consensus error rate <0.01%, a UMI read coverage of 15× (ONT R10.3), 25× (ONT R9.4.1) and 3× (Pacific Biosciences circular consensus sequencing) is needed, which provides a mean error rate of 0.0042%, 0.0041% and 0.0007%, respectively.
DOI: 10.1038/s41592-020-01041-y
Source: https://www.nature.com/articles/s41592-020-01041-y