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In situ genotyping of a pooled strain library after characterizing complex phenotypes
Michael J Lawson1, Daniel Camsund1, Jimmy Larsson1
1Department of Cell and Molecular Biology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden.
Molecular Systems Biology
|October 19, 2017
Summary
This study introduces a method to link individual cell genotypes to their observed phenotypes in large microbial libraries. This advance enables high-throughput screening of complex genetic traits in live cells.
Area of Science:
- Microbiology
- Genetics
- Biotechnology
Background:
- Live cell microscopy is crucial for understanding cellular processes.
- Characterizing large genetic libraries requires scalable phenotyping methods.
Purpose of the Study:
- To develop a method for linking genotypes to phenotypes in large, pool-generated cell strain libraries.
- To enable high-throughput screening of complex dynamic cellular phenotypes.
Main Methods:
- Single-molecule fluorescence time-lapse imaging of Escherichia coli strains.
- Utilizing barcoded plasmids expressing sgRNA for dCas9-mediated gene suppression.
- In situ genotype identification following detailed phenotype characterization.
Main Results:
- Demonstrated a proof-of-principle for genotype-phenotype linkage in live cell microscopy.
- Successfully screened Escherichia coli strains with barcoded plasmids for gene suppression effects.
- Enabled detailed characterization of complex dynamic phenotypes for diverse genetic libraries.
Conclusions:
- The developed method extends advanced live cell microscopy to the scale of genetic libraries.
- This approach facilitates the study of gene function, regulation, and intracellular dynamics.
- It offers a powerful tool for screening genetic variations and their phenotypic consequences.