Methods for selective protein imaging are critical for elucidating how cells orchestrate fundamental biological processes. We recently developed a chemoenzymatic method to modify bacterial proteins in situ for fluorescence imaging using N-myristoyl transferase (NMT). Target proteins outfitted with an N-terminal NMT recognition sequence are covalently modified with an azido fatty acid. Subsequent strain-promoted azide–alkyne cycloaddition allows for conjugation to cell-permeant fluorophores and imaging by fluorescence microscopy. Here we describe sample preparation and labeling protocols for imaging bacterial proteins in fixed and live cells.
CITATION STYLE
Ho, S. H., & Tirrell, D. A. (2019). N-myristoyl transferase (NMT)-catalyzed labeling of bacterial proteins for imaging in fixed and live cells. In Methods in Molecular Biology (Vol. 2012, pp. 315–326). Humana Press Inc. https://doi.org/10.1007/978-1-4939-9546-2_16
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