title: Comprehensive transposon mutant library of Pseudomonas aeruginosa.
abstract: We have developed technologies for creating saturating libraries of sequence-defined transposon insertion mutants in which each strain is maintained. Phenotypic analysis of such libraries should provide a virtually complete identification of nonessential genes required for any process for which a suitable screen can be devised. The approach was applied to Pseudomonas aeruginosa, an opportunistic pathogen with a 6.3-Mbp genome. The library that was generated consists of 30,100 sequence-defined mutants, corresponding to an average of five insertions per gene. About 12% of the predicted genes of this organism lacked insertions; many of these genes are likely to be essential for growth on rich media. Based on statistical analyses and bioinformatic comparison to known essential genes in E. coli, we estimate that the actual number of essential genes is 300-400. Screening the collection for strains defective in two defined multigenic processes (twitching motility and prototrophic growth) identified mutants corresponding to nearly all genes expected from earlier studies. Thus, phenotypic analysis of the collection may produce essentially complete lists of genes required for diverse biological activities. The transposons used to generate the mutant collection have added features that should facilitate downstream studies of gene expression, protein localization, epistasis, and chromosome engineering.
authors: Department of Medicine, University of Washington Genome Center, Box 352145, Seattle, WA 98195-2145, USA. mikejac@u.washington.edu
authors: Michael A
authors: MA
authors: Jacobs
authors: Ashley
authors: A
authors: Alwood
authors: Iyarit
authors: I
authors: Thaipisuttikul
authors: David
authors: D
authors: Spencer
authors: Eric
authors: E
authors: Haugen
authors: Stephen
authors: S
authors: Ernst
authors: Oliver
authors: O
authors: Will
authors: Rajinder
authors: R
authors: Kaul
authors: Christopher
authors: C
authors: Raymond
authors: Ruth
authors: R
authors: Levy
authors: Liu
authors: L
authors: Chun-Rong
authors: Donald
authors: D
authors: Guenthner
authors: Donald
authors: D
authors: Bovee
authors: Maynard V
authors: MV
authors: Olson
authors: Colin
authors: C
authors: Manoil
mesh_terms: D004926:Escherichia coli / Q000235:genetics; D015723:Gene Library; D005798:Genes, Bacterial; D016254:Mutagenesis, Insertional; D009154:Mutation; D010641:Phenotype; D011550:Pseudomonas aeruginosa / Q000235:genetics*; D013045:Species Specificity