title: Microbial variome database: point mutations, adaptive or not, in bacterial core genomes.
abstract: Analysis of genetic differences (gene presence/absence and nucleotide polymorphisms) among strains of a bacterial species is crucial to understanding molecular mechanisms of bacterial pathogenesis and selecting targets for novel antibacterial therapeutics. However, lack of genome-wide association studies on large and epidemiologically well-defined strain collections from the same species makes it difficult to identify the genes under positive selection and define adaptive polymorphisms in those genes. To address this need and to overcome existing limitations, we propose to create a "microbial variome"--a species-specific resource database of genomic variations based on molecular evolutionary analysis. Here, we present prototype variome databases of Escherichia coli and Salmonella enterica subspecies enterica (http://depts.washington.edu/sokurel/variome, last accessed March 26, 2013). The prototypes currently include the point mutations data of core protein-coding genes from completely sequenced genomes of 22 E. coli and 17 S. enterica strains. These publicly available databases allow for single- and multiple-field sorting, filtering, and searching of the gene variability data and the potential adaptive significance. Such resource databases would immensely help experimental research, clinical diagnostics, epidemiology, and environmental control of human pathogens.
authors.affiliation: Department of Microbiology, University of Washington, Seattle, USA. sujayc@u.washington.edu
authors.forename: Sujay
authors.initials: S
authors.lastname: Chattopadhyay
authors.forename: Fred
authors.initials: F
authors.lastname: Taub
authors.forename: Sandip
authors.initials: S
authors.lastname: Paul
authors.forename: Scott J
authors.initials: SJ
authors.lastname: Weissman
authors.forename: Evgeni V
authors.initials: EV
authors.lastname: Sokurenko
mesh_terms: D000220:Adaptation, Biological; D030541:Databases, Genetic; D019143:Evolution, Molecular; D016680:Genome, Bacterial; D017354:Point Mutation; D020641:Polymorphism, Single Nucleotide; D014584:User-Computer Interface
keywords: adaptive evolution; database; microbial variome; nucleotide polymorphisms