Affiliation:
1. Department of Genome Sciences, University of Washington, Seattle, Washington, USA
Abstract
ABSTRACT
We constructed a near-saturation transposon mutant library for
Burkholderia thailandensis
, a low-virulence surrogate for the causative agent of melioidosis (
Burkholderia pseudomallei
). A primary set of nearly 42,000 unique mutants (~7.5 mutants/gene) was generated using transposon Tn
5
derivatives. The strains carry insertions in 87% of the predicted protein-coding genes of the organism, corresponding to nearly all of those nonessential for growth on nutrient agar. To achieve high genome coverage, we developed procedures for efficient sequence identification of insertions in extremely GC-rich regions of DNA. To facilitate strain distribution, we created a secondary library with two mutants per gene for which most transposon locations had been confirmed by resequencing. A map of mutations in the two-allele library and procedures for obtaining strains can be found at
http://tools.nwrce.org/tn_mutants/
and
http://www.gs.washington.edu/labs/manoil/
. The library should facilitate comprehensive mutant screens and serve as a source of strains to test predicted genotype-phenotype associations.
IMPORTANCE
The Gram-negative bacterium
Burkholderia pseudomallei
is a biothreat agent due to its potential for aerosol delivery and intrinsic antibiotic resistance and because exposure produces pernicious infections. Large-scale studies of
B. pseudomallei
are limited by the fact that the organism must be manipulated under biological safety level 3 conditions. A close relative of
B. pseudomallei
called
Burkholderia thailandensis
, which can be studied under less restrictive conditions, has been validated as a low-virulence surrogate in studies of virulence, antibiotic resistance and other traits. To facilitate large-scale studies of
B. thailandensis
, we created a near-saturation, sequence-defined transposon mutant library of the organism. The library facilitates genetic studies that identify genotype-phenotype associations conserved in
B. pseudomallei
.
Publisher
American Society for Microbiology
Cited by
77 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献