Proteomics

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Quantitative chemoproteomic identification of lysine carboxylation in proteins


ABSTRACT: Carbon dioxide is an abundant biological gas that drives adaptive physiological responses within organisms from all domains. The basic biochemical mechanisms by which proteins serve as sensors of CO2 are, therefore, of great interest. CO2 is a potent electrophilic, and thus one way it can modulate protein biochemistry is by carboxylation of the primary amines group of lysines. However, the resulting cabamates spontaneously decompose, giving off CO2, which makes studying this modification notoriously challenging. Here we describe a chemoproteomic method to stably mimic CO2-carboxylated lysine residues in proteins by reacting them with OCNH. We leverage this method to develop a competition based strategy to quantitatively identify CO2-carboxylatedlysines of proteins and use it to explore the lysine ‘carboxylome’.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Escherichia Coli Synechocystis Sp.

SUBMITTER: Dustin King  

LAB HEAD: David Vocadlo

PROVIDER: PXD031976 | Pride | 2023-09-09

REPOSITORIES: Pride

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Publications

Chemoproteomic identification of CO<sub>2</sub>-dependent lysine carboxylation in proteins.

King Dustin T DT   Zhu Sha S   Hardie Darryl B DB   Serrano-Negrón Jesús E JE   Madden Zarina Z   Kolappan Subramania S   Vocadlo David J DJ  

Nature chemical biology 20220616 7


Carbon dioxide is an omnipresent gas that drives adaptive responses within organisms from all domains of life. The molecular mechanisms by which proteins serve as sensors of CO<sub>2</sub> are, accordingly, of great interest. Because CO<sub>2</sub> is electrophilic, one way it can modulate protein biochemistry is by carboxylation of the amine group of lysine residues. However, the resulting CO<sub>2</sub>-carboxylated lysines spontaneously decompose, giving off CO<sub>2</sub>, which makes studyi  ...[more]

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