Pseudomonas aeruginosa mexT is an indicator of PAO1 strain integrity
Eric D LoVullo1, Herbert P Schweizer1
1Department of Molecular Genetics and Microbiology, College of Medicine, Emerging Pathogens Institute, 2055 Mowry Road, Gainesville, FL 32610, USA.
Abstract:
Laboratory research with Pseudomonas aeruginosa commonly involves the prototype strain PAO1. There is continued concern that PAO1 sublines maintained and propagated in the same laboratory or different laboratories exhibit genetic and phenotypic variability that may affect the reproducibility and validity of research. Whole-genome sequencing and other research identified the mexT locus as a mutational hotspot, but the explication of the diverse mutations present in the various sublines and consequences remained rather cursory. Here we present evidence that MexT sequence diversity is a predictor of PAO1 lineage integrity and define the protein's prototype sequence.
Insights
Pseudomonas aeruginosa strain PAO1 sublines show genetic variability. MexT gene mutations predict PAO1 lineage integrity, ensuring research reproducibility and defining the MexT protein prototype sequence.
Area of Science:
- Microbiology
- Genetics
- Molecular Biology
Background:
- The Pseudomonas aeruginosa strain PAO1 is a widely used laboratory model.
- Sublines of PAO1 exhibit genetic and phenotypic variability, impacting research reproducibility.
- The mexT locus is a known mutational hotspot, but its diverse mutations and consequences are not fully understood.
Purpose of the Study:
- To investigate the genetic diversity within Pseudomonas aeruginosa PAO1 sublines.
- To determine if mexT gene sequence diversity can predict the integrity of PAO1 lineages.
- To define the prototype sequence of the MexT protein.
Main Methods:
- Whole-genome sequencing of PAO1 sublines.
- Analysis of mexT locus mutations.
- Comparison of MexT protein sequences across different sublines.
Main Results:
- Significant sequence diversity was observed in the mexT locus among PAO1 sublines.
- MexT sequence variation was found to be a reliable predictor of PAO1 lineage integrity.
- The prototype sequence of the MexT protein was defined.
Conclusions:
- MexT sequence diversity is a critical factor in maintaining the integrity of Pseudomonas aeruginosa PAO1 laboratory strains.
- Understanding MexT variations is essential for ensuring the reproducibility and validity of research using PAO1.
- Defining the prototype MexT sequence provides a crucial reference for future studies.
