Reference-independent comparative metagenomics using cross-assembly: crAss.

ABSTRACT:

Motivation

Metagenomes are often characterized by high levels of unknown sequences. Reads derived from known microorganisms can easily be identified and analyzed using fast homology search algorithms and a suitable reference database, but the unknown sequences are often ignored in further analyses, biasing conclusions. Nevertheless, it is possible to use more data in a comparative metagenomic analysis by creating a cross-assembly of all reads, i.e. a single assembly of reads from different samples. Comparative metagenomics studies the interrelationships between metagenomes from different samples. Using an assembly algorithm is a fast and intuitive way to link (partially) homologous reads without requiring a database of reference sequences.

Results

Here, we introduce crAss, a

SUBMITTER: Dutilh BE 

PROVIDER: S-EPMC3519457 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature