Overlap graphs and de Bruijn graphs: data structures for de novo genome assembly in the big data era

Raffaella Rizzi, Stefano Beretta, Murray Patterson, Yuri Pirola, Marco Previtali, Gianluca Della Vedova, Paola Bonizzoni
2019 Quantitative Biology  
De novo genome assembly relies on two kinds of graphs: de Bruijn graphs and overlap graphs. Overlap graphs are the basis for the Celera assembler, while de Bruijn graphs have become the dominant technical device in the last decade. Those two kinds of graphs are collectively called assembly graphs. Results: In this review, we discuss the most recent advances in the problem of constructing, representing and navigating assembly graphs, focusing on very large datasets. We will also explore some
more » ... utational techniques, such as the Bloom filter, to compactly store graphs while keeping all functionalities intact. Conclusions: We complete our analysis with a discussion on the algorithmic issues of assembling from long reads (e.g., PacBio and Oxford Nanopore). Finally, we present some of the most relevant open problems in this field. Author summary: All available assemblers are built upon the notions of de Bruijn graphs or overlap graphs. This review discusses the most recent advances in the problem of constructing, representing and navigating those graphs, focusing on very large datasets. Moreover, we present some of the most relevant open problems. 278
doi:10.1007/s40484-019-0181-x fatcat:diii4vjqijf4hglbg2neuvcm44