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Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Site-specific N-terminal labeling of proteins using sortase-mediated reactions.
Nature Protocols 2013 September
This protocol describes the use of sortase-mediated reactions to label the N terminus of any given protein of interest. The sortase recognition sequence, LPXTG (for Streptococcus aureus sortase A) or LPXTA (for Staphylococcus pyogenes sortase A), can be appended to a variety of probes such as fluorophores, biotin or even to other proteins. The protein to be labeled acts as a nucleophile by attacking the intermediate formed between the probe containing the LPXTG/A motif and the sortase enzyme. If sortase, the protein of interest and a suitably functionalized label are available, the reactions usually require less than 3 h.
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