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The acetate switch.

Alan J Wolfe1

  • 1Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153, USA. awolfe@lumc.edu

Microbiology and Molecular Biology Reviews : MMBR
|March 10, 2005
PubMed
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Cells switch their lifestyle to survive nutrient scarcity by managing acetate. This "acetate switch" involves enzymes like phosphotransacetylase (PTA) and acetate kinase (ACK), impacting cell processes from growth to pathogenesis.

Area of Science:

  • Microbiology
  • Cell Biology
  • Biochemistry

Background:

  • Cells must adapt to fluctuating nutrient availability, switching between growth and survival modes.
  • The
  • acetate switch
  • is a critical lifestyle adaptation where cells transition from producing to scavenging acetate.

Purpose of the Study:

  • To elucidate the mechanisms, triggers, and cellular consequences of the
  • acetate switch
  • .

Main Methods:

  • Review of existing literature on acetate metabolism and regulation.
  • Analysis of key enzymes: phosphotransacetylase (PTA), acetate kinase (ACK), and AMP-forming acetyl-CoA synthetase (AMP-ACS).
  • Discussion of acetyl phosphate (acetyl ~P) signaling and its effects on cellular processes.

Related Experiment Videos

Main Results:

  • Identified central components (PTA, ACK, AMP-ACS) and their roles in acetate excretion/dissimilation.
  • Demonstrated acetyl phosphate's influence on diverse cellular functions, including organelle biogenesis, cell cycle, biofilm formation, and pathogenesis.
  • Described regulatory mechanisms for AMP-ACS induction and activation, involving nucleoid proteins and reversible acetylation.

Conclusions:

  • The
  • acetate switch
  • is a fundamental cellular strategy for nutrient adaptation.
  • Acetyl phosphate acts as a key intracellular signal regulating various cellular processes.
  • Understanding this switch provides insights into microbial survival, pathogenesis, and potential therapeutic targets across diverse organisms.