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Old acetogens, new light.

Harold L Drake1, Anita S Gössner, Steven L Daniel

  • 1Department of Ecological Microbiology, University of Bayreuth, 95440 Bayreuth, Germany. hld@uni-bayreuth.de

Annals of the New York Academy of Sciences
|April 2, 2008
PubMed
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Acetogens use the acetyl-CoA Wood-Ljungdahl pathway for energy and carbon fixation. This article honors their discoverers and highlights the ecological importance of acetogens and their unique pathway.

Area of Science:

  • Microbiology
  • Biochemistry
  • Astrobiology

Background:

  • Acetogens are microbes that utilize the acetyl-CoA Wood-Ljungdahl pathway for energy conservation and carbon dioxide fixation.
  • The discovery and enzymology of this pathway have historical significance, influencing early biological tracer studies and the discovery of tungsten's biological activity.

Purpose of the Study:

  • To honor the scientists who discovered acetogens and elucidated the acetyl-CoA pathway.
  • To review the ecology and physiology of acetogens, emphasizing their role in the carbon cycle and early life evolution.

Main Methods:

  • Historical review of scientific literature.
  • Analysis of the ecological and physiological roles of acetogens.

Main Results:

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  • The acetyl-CoA pathway is a fundamental process in the global carbon cycle, utilized by diverse prokaryotes.
  • Acetogenesis may represent one of the earliest autotrophic pathways, crucial for the evolution of life.

Conclusions:

  • Acetogens and the acetyl-CoA pathway are vital to microbial metabolism and primary production in various ecosystems.
  • Understanding acetogenesis provides insights into early life and the evolution of metabolic processes on Earth.