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Related Experiment Videos

Global changes in cellular gene expression during bacteriophage PRD1 infection.

Minna M Poranen1, Janne J Ravantti, A Marika Grahn

  • 1Institute of Biotechnology, Viikki Biocenter, P.O. Box 56 (Viikinkaari 5), 00014 University of Helsinki, Helsinki, Finland.

Journal of Virology
|July 29, 2006
PubMed
Summary

This study tracked gene expression changes in Escherichia coli during bacteriophage PRD1 infection. Most host gene expression changes occurred late in infection, with induced genes often related to stress responses.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genomics

Background:

  • Understanding host-virus interactions is crucial for molecular biology.
  • Previous studies lacked comprehensive analysis of gene expression across the entire viral replication cycle.
  • Investigating host gene responses provides insights into viral pathogenesis.

Purpose of the Study:

  • To comprehensively analyze Escherichia coli gene expression changes throughout the bacteriophage PRD1 infection cycle.
  • To determine the timing and extent of host gene reprogramming during viral infection.
  • To identify specific host genes and pathways affected by bacteriophage infection.

Main Methods:

  • Utilized microarray technology to measure mRNA levels.
  • Systematically analyzed gene expression for over 99% of Escherichia coli open reading frames.

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  • Monitored gene expression changes throughout the entire viral replication cycle.

    • Main Results:

    • Global changes in Escherichia coli gene expression were moderate despite individual gene modifications.
    • The majority of virus-induced gene expression changes occurred after virion component synthesis.
    • Highly induced genes primarily encoded chaperones and other stress-inducible proteins.

    Conclusions:

    • Bacteriophage PRD1 infection does not cause major host reprogramming during early infection stages.
    • Host gene expression is significantly altered later in the viral replication cycle.
    • The induction of stress-related genes suggests a host response to viral replication.