Peptide analysis using a solid support

G - Physics – 01 – N

Patent

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Details

G01N 33/58 (2006.01) C12Q 1/37 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2448534

The present invention relates to a method of identifying a polypeptide, which method comprises the steps of (a) derivatization of the N-terminus of the polypeptide, or the N-termini of one or more peptides of the polypeptide, with at least one acidic reagent which comprises a sulfonyl moiety coupled to an activated acid moiety to provide one or more peptide derivatives; analyzing at least one such derivative using a mass spectrometric technique to provide a fragmentation pattern, and (c) interpreting the fragmentation pattern obtained, wherein the peptide or polypeptide is immobilized to a solid support at least during step(a). Furthermore, the present invention also relates to a kit for identifying a polypeptide by a mass spectrometric technique.

La présente invention concerne une méthode d'identification d'un polypeptide. Cette méthode consiste (a) à effectuer la dérivatisation de la terminaison N du polypeptide, ou des terminaisons N d'un ou de plusieurs peptides de ce polypeptide, avec au moins un réactif acide comprenant une fraction sulfonyle couplée à une fraction acide activée en vue d'obtenir un ou plusieurs dérivés peptidiques, (b) à analyser l'un au moins de ces dérivés au moyen d'une technique spectrométrique de masse en vue de produire un modèle de fragmentation, et (c) à interpréter le modèle de fragmentation ainsi obtenu, le peptide ou le polypeptide étant immobilisé sur un support solide au moins pendant l'étape (a). Par ailleurs, la présente invention concerne une trousse destinée à identifier un polypeptide au moyen d'une technique spectrométrique de masse.

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