Simplitigs as an efficient and scalable representation of de Bruijn graphs.

Simplitigs as an efficient and scalable representation of de Bruijn graphs.
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DOI:
10.1186/s13059-021-02297-z
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发表时间:
2021-04-06
期刊:
影响因子:
12.3
通讯作者:
Kucherov G
Kucherov G
中科院分区:
生物学1区
文献类型:
--
作者:
Břinda K;Baym M;Kucherov G

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德布鲁因图在生物信息学中发挥着至关重要的作用,但它们缺乏通用的可扩展表示。在这里,我们介绍简化作为一种紧凑、高效和可扩展的表示,以及ProphAsm,一种用于它们计算的快速算法。以模式生物和两个细菌泛基因组的组合为例,我们将简化序列与现有的最佳代表单位序列进行了比较,并证明简化序列在累积序列长度和数量上提供了实质性的改进。当与常用的Burrows-Wheeler Transform索引结合使用时,简化可以减少内存、索引加载和查询时间,如GenBank细菌泛基因组的大规模示例所示。在线版本包含补充材料,可在10.1186/s13059-021-02297-z获得。
de Bruijn graphs play an essential role in bioinformatics, yet they lack a universal scalable representation. Here, we introduce simplitigs as a compact, efficient, and scalable representation, and ProphAsm, a fast algorithm for their computation. For the example of assemblies of model organisms and two bacterial pan-genomes, we compare simplitigs to unitigs, the best existing representation, and demonstrate that simplitigs provide a substantial improvement in the cumulative sequence length and their number. When combined with the commonly used Burrows-Wheeler Transform index, simplitigs reduce memory, and index loading and query times, as demonstrated with large-scale examples of GenBank bacterial pan-genomes. The online version contains supplementary material available at 10.1186/s13059-021-02297-z.
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