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Cysteines under ROS attack in plants: a proteomics view.

Salma Akter1, Jingjing Huang2, Cezary Waszczak3

  • 1Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium Structural Biology Research Centre, VIB, 1050 Brussels, Belgium Brussels Centre for Redox Biology, 1050 Brussels, Belgium Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium Faculty of Biological Sciences, University of Dhaka, 1000 Dhaka, Bangladesh.

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Summary

Plants use cysteine residues to sense reactive oxygen species (ROS) and trigger defense mechanisms. Understanding these redox modifications is key to plant signaling and stress response.

Keywords:
Cysteine (Cys)oxidative post-translational modificationreactive oxygen species (ROS)redox proteomicsredox regulationsulfenic acid.

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Area of Science:

  • Plant biology
  • Biochemistry
  • Molecular biology

Background:

  • Plants produce reactive oxygen species (ROS) during metabolism and stress, which can damage cellular components.
  • Plants have evolved defense mechanisms against ROS, utilizing them as signaling molecules to activate responses.
  • Cysteine (Cys) residues in proteins are highly sensitive to ROS, undergoing various post-translational modifications crucial for signaling.

Purpose of the Study:

  • To review current understanding of cysteine reactivity with ROS in plants.
  • To provide an overview of proteomic techniques for identifying redox-modified cysteines.
  • To highlight the significance of sulfenylated proteins in plant signal transduction.

Main Methods:

  • Literature review of cysteine reactivity and ROS signaling in plants.
  • Overview of redox proteomic techniques used to identify modified cysteines.
  • Focus on methods for identifying sulfenylated proteins.

Main Results:

  • Cysteine residues are key targets for ROS-mediated post-translational modifications.
  • Various oxidation states of cysteine (e.g., S-glutathionylated, sulfenylated) are involved in redox signaling.
  • Sulfenic acid (-SOH) modification is critical for ROS-sensing pathways.

Conclusions:

  • Redox proteomic studies are essential for identifying ROS-sensor proteins and understanding cysteine modifications.
  • Sulfenylated proteins are particularly important for plant signal transduction pathways.
  • Further research into cysteine redox modifications will advance our understanding of plant stress responses.