Emerging heterogeneous compartments by viruses in single bacterial cells

Area of Science:

• Microbiology
• Molecular Biology
• Systems Biology

Background:

• Spatial organization is crucial for biological processes, influencing molecular variability and development.
• Understanding subcellular organization in viral infections provides insights into coordinated development and decision-making.

Purpose of the Study:

• To investigate how spatial organization influences bacteriophage lambda development and decision-making.
• To characterize viral components and processes within subcellular space during infection.

Main Methods:

• Live-cell and in situ single-molecule fluorescence imaging.
• Examination of lambda DNA replication, transcription, virion assembly, and resource recruitment.
• Development of a spatiotemporal model for the phage infection cycle.

Main Results:

• Bacteriophage lambda DNAs establish distinct subcellular compartments within host cells.
• These compartments sustain heterogeneous viral development at the single-cell level.
• The E. coli nucleoid physically segregates these individual phage compartments.

Conclusions:

• Spatial organization, specifically compartmentalization, is a key mechanism driving heterogeneous phage development.
• The physical separation by the bacterial nucleoid contributes to distinct viral developmental pathways.
• This study provides mechanistic insights into how spatial factors shape viral infection dynamics and single-cell phenotypes.