Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 70, Issue 16, Pages 4279-4286Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erz135
Keywords
GSNO; nitric oxide; plant immunity; redox signalling; S-nitrosation; sulfur; zinc finger transcription factors
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Funding
- BBSRC [BB/H000984/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/H000984/1] Funding Source: Medline
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The role of sulfur in redox signalling is discussed, focusing on S-nitrosation, a key redox-based post-translational modification that regulates a growing list of biological functions in plant biology. Abstract Nitric oxide (NO), more benign than its more reactive and damaging related molecules, reactive oxygen species (ROS), is perfectly suited for duties as a redox signalling molecule. A key route for NO bioactivity is through S-nitrosation, the addition of an NO moiety to a protein Cys thiol (-SH). This redox-based, post-translational modification (PTM) can modify protein function analogous to more well established PTMs such as phosphorylation, for example by modulating enzyme activity, localization, or protein-protein interactions. At the heart of the underpinning chemistry associated with this PTM is sulfur. The emerging evidence suggests that S-nitrosation is integral to a myriad of plant biological processes embedded in both development and environmental relations. However, a role for S-nitrosation is perhaps most well established in plant-pathogen interactions.
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