Peroxiredoxins are conserved markers of circadian rhythms

Rachel S Edgar, Edward W Green, Yuwei Zhao, Gerben van Ooijen, Maria Olmedo, Ximing Qin, Yao Xu, Min Pan, Utham K Valekunja, Kevin A Feeney, Elizabeth S Maywood, Michael H Hastings, Nitin S Baliga, Martha Merrow, Andrew J Millar, Carl H Johnson, Charalambos P Kyriacou, John S O'Neill, Akhilesh B Reddy

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Cellular life emerged ∼3.7 billion years ago. With scant exception, terrestrial organisms have evolved under predictable daily cycles owing to the Earth's rotation. The advantage conferred on organisms that anticipate such environmental cycles has driven the evolution of endogenous circadian rhythms that tune internal physiology to external conditions. The molecular phylogeny of mechanisms driving these rhythms has been difficult to dissect because identified clock genes and proteins are not conserved across the domains of life: Bacteria, Archaea and Eukaryota. Here we show that oxidation-reduction cycles of peroxiredoxin proteins constitute a universal marker for circadian rhythms in all domains of life, by characterizing their oscillations in a variety of model organisms. Furthermore, we explore the interconnectivity between these metabolic cycles and transcription-translation feedback loops of the clockwork in each system. Our results suggest an intimate co-evolution of cellular timekeeping with redox homeostatic mechanisms after the Great Oxidation Event ∼2.5 billion years ago.
Original languageEnglish
Pages (from-to)459-464
Number of pages6
Issue number7399
Early online date16 May 2012
Publication statusPublished - 2012

Keywords / Materials (for Non-textual outputs)

  • systems biology
  • Biological Clocks
  • Circadian Rhythms
  • Arabidopsis thaliana
  • Archaea
  • Evolution


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