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Related Experiment Videos

Cyclic di-GMP as a bacterial second messenger.

David A D'Argenio1, Samuel I Miller2,3,1

  • 1Department of Microbiology, University of Washington, Seattle, WA 98195, USA.

Microbiology (Reading, England)
|August 4, 2004
PubMed
Summary

Bacteria adapt to environmental signals by altering cell surfaces, a process controlled by GGDEF and EAL domain proteins regulating cyclic di-GMP (c-di-GMP). These proteins manage bacterial adhesion and proliferation through c-di-GMP synthesis and degradation.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • Environmental signals induce bacterial cell surface modifications, impacting persistence and proliferation.
  • Proteins with GGDEF and EAL domains regulate these adaptations in diverse bacteria.
  • These proteins are hypothesized to control cell surface adhesiveness via the second messenger cyclic di-GMP (c-di-GMP).

Purpose of the Study:

  • To investigate the role of GGDEF and EAL domain proteins in bacterial adaptation.
  • To elucidate the mechanism by which these proteins regulate cell surface properties.
  • To understand the control of cyclic di-GMP levels in bacteria.

Main Methods:

  • Genetic analysis of GGDEF and EAL domain proteins.
  • Biochemical assays to determine enzymatic activities.

Related Experiment Videos

  • Studies on bacterial cell surface properties and adhesion.

    • Main Results:

    • Genetic evidence implicates GGDEF domains in c-di-GMP synthesis (cyclase activity).
    • EAL domains are identified as strong candidates for c-di-GMP degradation (phosphodiesterase activity).
    • These activities collectively regulate intracellular c-di-GMP levels.

    Conclusions:

    • GGDEF and EAL domain proteins are key regulators of bacterial adaptation to environmental cues.
    • The balance of c-di-GMP synthesis and degradation by these domains controls bacterial cell surface characteristics.
    • Understanding these mechanisms is crucial for controlling bacterial persistence and proliferation.