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Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing
Published on: December 23, 2022
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Challenges and opportunities for strain verification by whole-genome sequencing
Jenna E Gallegos1, Sergei Hayrynen2, Neil R Adames1
1Colorado State University, Colorado, USA.
Scientific Reports
|April 5, 2020
Summary
Strain validation using whole genome sequencing (WGS) is crucial for life science research. Our study found unexpected mutations in yeast segregants, highlighting the need for WGS and better bioinformatics tools for accurate sample verification.
Area of Science:
- Genetics
- Genomics
- Molecular Biology
Background:
- Laboratory biological materials like cell lines and strains are frequently exchanged.
- Established protocols often lack rigorous verification, leading to potential mix-ups, contamination, and acquired mutations.
- The cost of next-generation sequencing is decreasing, making advanced genomic analyses more accessible.
Purpose of the Study:
- To demonstrate the necessity of whole genome sequencing (WGS) for validating laboratory strains.
- To identify unexpected genetic alterations in commonly used research materials.
- To assess the suitability of current bioinformatics tools for strain verification.
Main Methods:
- Sequencing of haploid yeast segregants from a commercial mutant collection using whole genome sequencing (WGS).
- Bioinformatic analysis of sequencing data to identify genetic variations.
- Comparison of identified mutations against known strain information.
Main Results:
- Identification of several unexpected mutations in the sequenced yeast segregants.
- Evidence suggests that existing bioinformatics tools may not be optimal for routine strain verification.
- The study underscores the presence of genetic instability in commonly used laboratory strains.
Conclusions:
- Whole genome sequencing (WGS) is a viable and necessary method for verifying the genetic integrity of laboratory strains.
- Improved bioinformatics tools are required to support WGS-based strain validation.
- Completing reference genomes for widely used laboratory strains is essential for accurate verification and reliable research outcomes.
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