PROTEIN SEQUENCING METHOD AND REAGENTS
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United States of America Patent
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Issued Date -
Jun 13, 2024
app pub date -
Sep 22, 2023
filing date -
Sep 25, 2009
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Abstract
The invention describes methods and reagents useful for sequencing polypeptide molecules. The method comprises affixing a polypeptide to a substrate and contacting the polypeptide with a plurality of probes that selectively bind to a terminal amino acid or a terminal amino acid derivative. Probes bound to the polypeptide molecule are then identified before cleaving the terminal amino acid or terminal amino acid derivative of the polypeptide. Also provided are probe compositions comprising (a) a ClpS variant comprising at least 80% sequence identity to SEQ ID NO: 1, wherein the ClpS variant binds to an N-terminal amino acid or a N-terminal amino acid derivative with a different selectivity than a wild-type ClpS; and (b) a detectable label.
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