Development of a small peptide tag for covalent labeling of proteins.

BIOCONJUGATE CHEMISTRY(2007)

Cited 24|Views16
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Abstract
A 21-mer peptide that can be used to covalently introduce synthetic molecules into proteins has been developed. Phage-displayed peptide libraries were subjected to reaction-based selection with 1,3-diketones. The peptide was further evolved by addition of a randomized region and reselection for improved binding. The resulting 21-mer peptide had a reactive amino group that formed an enaminone with 1,3-diketone and was used as a tag for labeling of maltose binding protein. Using this peptide tag and 1,3-diketone derivatives, a variety of molecules such as reporter probes and functionalities may be covalently introduced into proteins of interest.
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phage display
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