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Updated: May 30, 2026
11:35
Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants
Published on: May 4, 2018
Pseudomonas aeruginosa Genomic Structure and Diversity
Jens Klockgether1, Nina Cramer, Lutz Wiehlmann
1Klinik für Pädiatrische Pneumologie, Allergologie und Neonatologie, Klinische Forschergruppe Hannover, Germany.
Frontiers in Microbiology
|August 3, 2011
Summary
Pseudomonas aeruginosa has a stable core genome and a diverse accessory genome, with most genetic variation arising from mobile DNA elements. This genomic plasticity allows adaptation and gene exchange with other bacteria.
Area of Science:
- Microbiology
- Genomics
- Bacterial Pathogenesis
Background:
- Pseudomonas aeruginosa is an opportunistic pathogen with a large, adaptable genome.
- Its genome comprises a conserved core and a variable accessory component, contributing to its metabolic versatility.
Purpose of the Study:
- To investigate the genomic diversity within Pseudomonas aeruginosa, focusing on both core and accessory genome elements.
- To understand the mechanisms driving intraclonal diversity and the role of mobile genetic elements.
Main Methods:
- Comparative genomics of two Pseudomonas aeruginosa strains from the PA14 clonal complex.
- Analysis of single nucleotide substitutions (SNPs) and their distribution.
- Identification of regions of genome plasticity and mobile genetic elements.
Main Results:
- The core genome of Pseudomonas aeruginosa is highly conserved with low sequence diversity (0.5-0.7%).
- Genome diversity is primarily driven by accessory DNA elements in 79 regions of plasticity, including genomic islands.
- Intraclonal comparison revealed minimal genome-wide differences (<0.01%), with SNPs concentrated in specific genes and mobile elements like phage DNA.
Conclusions:
- Pseudomonas aeruginosa possesses a stable core genome and a dynamic accessory genome facilitating adaptation.
- Genomic islands and horizontal gene transfer are key drivers of Pseudomonas aeruginosa's genetic diversity and adaptability.
- Understanding this genomic architecture is crucial for comprehending its evolution and interaction with other microorganisms.
Keywords:
Pseudomonas aeruginosaaccessory genomeclonal complexcore genomegenomegenomic islandoligonucleotide signatureMore Related Videos
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