Abstract
Protein tyrosine O-sulfation (PTS) plays a crucial role in numerous extracellular protein-protein interactions. It is involved in diverse physiological processes and the development of human diseases, including AIDS and cancer. To facilitate the study of PTS in live mammalian cells, an approach for the site-specific synthesis of tyrosine-sulfated proteins (sulfoproteins) was developed. This approach takes advantage of an evolved Escherichia coli tyrosyl-tRNA synthetase to genetically encode sulfotyrosine (sTyr) into any proteins of interest (POI) in response to a UAG stop codon. Here, we give a step-by-step account of the incorporation of sTyr in HEK293T cells using the enhanced green fluorescent protein as an example. This method can be widely applied to incorporating sTyr into any POI to investigate the biological functions of PTS in mammalian cells.
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He, X., Chen, Y., Guo, J., Niu, W. (2023). Site-Specific Incorporation of Sulfotyrosine into Proteins in Mammalian Cells. In: Tsai, YH., Elsässer, S.J. (eds) Genetically Incorporated Non-Canonical Amino Acids. Methods in Molecular Biology, vol 2676. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3251-2_17
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DOI: https://doi.org/10.1007/978-1-0716-3251-2_17
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