Fatty Acyl Sulfonyl Fluoride as an Activity-Based Probe for Profiling Fatty Acid-Associated Proteins in Living Cells |
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Authors: | Dong Zhang Minghao Lu Chengjie Chen Yaxin Xu Prof Tao Peng |
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Affiliation: | 1. State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055 P. R. China
These authors contributed equally to this work.;2. State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055 P. R. China |
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Abstract: | Fatty acids play fundamental structural, metabolic, functional, and signaling roles in all biological systems. Altered fatty acid levels and metabolism have been associated with many pathological conditions. Chemical probes have greatly facilitated biological studies on fatty acids. Herein, we report the development and characterization of an alkynyl-functionalized long-chain fatty acid-based sulfonyl fluoride probe for covalent labelling, enrichment, and identification of fatty acid-associated proteins in living cells. Our quantitative chemical proteomics show that this sulfonyl fluoride probe targets diverse classes of fatty acid-associated proteins including many metabolic serine hydrolases that are known to be involved in fatty acid metabolism and modification. We further validate that the probe covalently modifies the catalytically or functionally essential serine or tyrosine residues of its target proteins and enables evaluation of their inhibitors. The sulfonyl fluoride-based chemical probe thus represents a new tool for profiling the expression and activity of fatty acid-associated proteins in living cells. |
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Keywords: | activity-based probes chemical proteomics fatty acid-associated proteins hydrolases proteomics |
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