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Probe-based bacterial single-cell RNA sequencing predicts toxin regulation.

Ryan McNulty1,2, Duluxan Sritharan3,4, Seong Ho Pahng4,5

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|April 3, 2023
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This summary is machine-generated.

Researchers developed probe-based bacterial sequencing (ProBac-seq) for single-cell RNA sequencing in bacteria. This method reveals cell states and gene expression heterogeneity, aiding in understanding bacterial populations and pathogenicity.

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Area of Science:

  • Microbiology
  • Genomics
  • Molecular Biology

Background:

  • Clonal bacterial populations exhibit transcriptional variation for specialized cell states and increased fitness.
  • Studying isogenic bacterial populations at the single-cell level is crucial for understanding diverse cell states.

Purpose of the Study:

  • To develop a novel method for bacterial single-cell RNA sequencing.
  • To analyze transcriptional heterogeneity in bacterial populations.
  • To investigate the impact of environmental factors on bacterial pathogenicity.

Main Methods:

  • Developed probe-based bacterial sequencing (ProBac-seq).
  • Utilized DNA probes and a microfluidic platform for single-cell RNA sequencing.
  • Sequenced transcriptomes of thousands of individual bacterial cells.

Main Results:

  • ProBac-seq successfully sequenced transcriptomes of thousands of bacterial cells, detecting hundreds of transcripts per cell.
  • Applied to Bacillus subtilis and Escherichia coli, ProBac-seq identified known cell states and uncovered novel transcriptional heterogeneity.
  • Analysis of Clostridium perfringens revealed heterogeneous toxin expression in a subpopulation, modulated by acetate.

Conclusions:

  • ProBac-seq is an effective method for uncovering transcriptional heterogeneity in isogenic microbial populations.
  • The method can identify perturbations affecting bacterial pathogenicity, as demonstrated with Clostridium perfringens.
  • Understanding single-cell transcriptional states is key to deciphering bacterial adaptation and virulence.