Portal de Periódicos da CAPES

Space-efficient and exact de Bruijn graph representation based on a Bloom filter

2013; BioMed Central; Volume: 8; Issue: 1 Linguagem: Inglês

10.1186/1748-7188-8-22

1748-7188

Rayan Chikhi, Guillaume Rizk,

Algorithms and Data Compression

The de Bruijn graph data structure is widely used in next-generation sequencing (NGS). Many programs, e.g. de novo assemblers, rely on in-memory representation of this graph. However, current techniques for representing the de Bruijn graph of a human genome require a large amount of memory (≥30 GB).We propose a new encoding of the de Bruijn graph, which occupies an order of magnitude less space than current representations. The encoding is based on a Bloom filter, with an additional structure to remove critical false positives.An assembly software implementing this structure, Minia, performed a complete de novo assembly of human genome short reads using 5.7 GB of memory in 23 hours.