A methodology for carbamate post-translational modification discovery and its application in Escherichia coli

Linthwaite, Victoria L.; Cann, Martin J.

Abstract

Carbon dioxide can influence cell phenotypes through the modulation of signalling pathways. CO2 regulates cellular processes as diverse as metabolism, cellular homeostasis, chemosensing and pathogenesis. This diversity of regulated processes suggests a broadly conserved mechanism for CO2 interactions with diverse cellular targets. CO2 is generally unreactive but can interact with neutral amines on protein under normal intracellular conditions to form a carbamate post-translational modification (PTM). We have previously demonstrated the presence of this PTM in a subset of protein produced by the model plant species Arabidopsis thaliana. Here, we describe a detailed methodology for identifying new carbamate PTMs in an extracted soluble proteome under biologically relevant conditions. We apply this methodology to the soluble proteome of the model prokaryote Escherichia coli and identify new carbamate PTMs. The application of this methodology, therefore, supports the hypothesis that the carbamate PTM is both more widespread in biology than previously suspected and may represent a broadly relevant mechanism for CO2–protein interactions.

Citation

Linthwaite, V. L., & Cann, M. J. (2021). A methodology for carbamate post-translational modification discovery and its application in Escherichia coli. Interface Focus, 11(2), Article 20200028. https://doi.org/10.1098/rsfs.2020.0028

• Journal Article Type: Article
• Acceptance Date: Dec 9, 2020
• Online Publication Date: Feb 12, 2021
• Publication Date: 2021-04
• Deposit Date: Aug 5, 2021
• Publicly Available Date: Sep 9, 2022
• Journal: Interface Focus
• Publisher: The Royal Society
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 2
• Article Number: 20200028
• DOI: https://doi.org/10.1098/rsfs.2020.0028