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arXiv 1306.1569q-bio.GN
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从原始测序读数中远程鉴定微生物的低带宽和非计算密集型

Low-bandwidth and non-compute intensive remote identification of microbes from raw sequencing reads

Laurent Gautier, Ole Lund

摘要:

廉价的高通量DNA测序可能很快就会成为常规,不仅适用于人类基因组,而且适用于几乎任何需要从DNA中识别活生物体的工作:追踪传染性病原体、控制食品、生物反应器或环境样本。我们提出了一种新的通用方法来分析测序数据,其中参考基因组不必指定。使用分布式架构,我们能够向远程服务器查询关于引用可能是什么的提示,传输相对少量的数据,并且提示可以用于计算要求更高的工作。我们的系统包括一个服务器与已知的参考DNA索引,和一个客户端与原始测序读取。客户端发送一个未识别读取的样本,并作为回报接收服务器已知的匹配引用列表。可以检索参考的序列,并将其用于读取的穷举计算,例如比对。为了证明这种方法,我们已经实现了一个网络服务器,索引数以万计的公开可用的基因组和基因组区域从各种生物体和查询测序读取匹配命中返回列表。我们还实现了两个客户端,其中一个在Web浏览器中运行,以证明可以在不需要传输非常大量的数据的情况下,并且在适度供电的计算设备上识别未知来源的千兆字节的原始测序读数。可通过http://tapir.cbs.dtu.dk访问网站。python命令行客户端、服务器和补充数据的源代码可以在http://bit.ly/1aURxkc上获得。

英文摘要:

Cheap high-throughput DNA sequencing may soon become routine not only for human genomes but also for practically anything requiring the identification of living organisms from their DNA: tracking of infectious agents, control of food products, bioreactors, or environmental samples. We propose a novel general approach to the analysis of sequencing data in which the reference genome does not have to be specified. Using a distributed architecture we are able to query a remote server for hints about what the reference might be, transferring a relatively small amount of data, and the hints can be used for more computationally-demanding work. Our system consists of a server with known reference DNA indexed, and a client with raw sequencing reads. The client sends a sample of unidentified reads, and in return receives a list of matching references known to the server. Sequences for the references can be retrieved and used for exhaustive computation on the reads, such as alignment. To demonstrate this approach we have implemented a web server, indexing tens of thousands of publicly available genomes and genomic regions from various organisms and returning lists of matching hits from query sequencing reads. We have also implemented two clients, one of them running in a web browser, in order to demonstrate that gigabytes of raw sequencing reads of unknown origin could be identified without the need to transfer a very large volume of data, and on modestly powered computing devices. A web access is available at http://tapir.cbs.dtu.dk. The source code for a python command-line client, a server, and supplementary data is available at http://bit.ly/1aURxkc.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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