title: Meraculous: de novo genome assembly with short paired-end reads.
abstract: We describe a new algorithm, meraculous, for whole genome assembly of deep paired-end short reads, and apply it to the assembly of a dataset of paired 75-bp Illumina reads derived from the 15.4 megabase genome of the haploid yeast Pichia stipitis. More than 95% of the genome is recovered, with no errors; half the assembled sequence is in contigs longer than 101 kilobases and in scaffolds longer than 269 kilobases. Incorporating fosmid ends recovers entire chromosomes. Meraculous relies on an efficient and conservative traversal of the subgraph of the k-mer (deBruijn) graph of oligonucleotides with unique high quality extensions in the dataset, avoiding an explicit error correction step as used in other short-read assemblers. A novel memory-efficient hashing scheme is introduced. The resulting contigs are ordered and oriented using paired reads separated by ∼280 bp or ∼3.2 kbp, and many gaps between contigs can be closed using paired-end placements. Practical issues with the dataset are described, and prospects for assembling larger genomes are discussed.
authors.affiliation: U.S. Department of Energy Joint Genome Institute, Walnut Creek, California, United States of America. jchapman@lbl.gov
authors.forename: Jarrod A
authors.initials: JA
authors.lastname: Chapman
authors.forename: Isaac
authors.initials: I
authors.lastname: Ho
authors.forename: Sirisha
authors.initials: S
authors.lastname: Sunkara
authors.forename: Shujun
authors.initials: S
authors.lastname: Luo
authors.forename: Gary P
authors.initials: GP
authors.lastname: Schroth
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Rokhsar
mesh_terms: D000465:Algorithms; D016477:Artifacts; D015982:Bias; D046528:Chimerism; D015825:Chromosomes, Fungal / Q000235:genetics; D003198:Computer Simulation; D004251:DNA Transposable Elements / Q000235:genetics; D030541:Databases, Genetic; D004926:Escherichia coli / Q000235:genetics; D015723:Gene Library; D049770:Genes, Mating Type, Fungal; D016681:Genome, Fungal / Q000235:genetics*; D016254:Mutagenesis, Insertional / Q000235:genetics; D010843:Pichia / Q000235:genetics*; D012015:Reference Standards; D017422:Sequence Analysis, DNA / Q000379:methods*
chemical_list: D004251:DNA Transposable Elements