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    • 9. 发明公开
    • Biologically produced cyclic affinity tags
    • Biologisch hergestellte cyclischeAffinitätsmarker
    • EP2267003A1
    • 2010-12-29
    • EP09163581.3
    • 2009-06-24
    • Applied NanoSystems B.V.
    • The designation of the inventor has not yet been filed
    • C07K7/50
    • C07K7/06C07K1/22C07K5/0812C07K5/1016C07K14/4703C12P21/02
    • The invention relates to novels ways of introducing an affinity tag into a protein of interest. Provided is an enzymatic method for providing a proteinaceous substance comprising a polypeptide of interest and a cyclic affinity tag, comprising the steps of: (a) providing at least one precursor proteinaceous substance, the precursor comprising said protein of interest and at least one motif of the general formula X1-Tag-X2, wherein X1 and X2 represent amino acids whose side chains can be linked enzymatically by a covalent bond; Tag is an amino acid sequence capable of binding to a binding partner when cyclized; (b) contacting said precursor with at least one enzyme capable of forming a covalent bond between X1 and X2, thereby introducing an intramolecular ring structure comprising the Tag sequence; and (c) isolating the resulting cyclized proteinaceous substance. Also provided are proteinaceous substances obtainable thereby and the use thereof, for instance for preparing a peptide library.
    • 本发明涉及将亲和标签引入感兴趣的蛋白质的方法。 本发明提供了一种用于提供包含感兴趣的多肽和环状亲和标签的蛋白质物质的酶法,其包括以下步骤:(a)提供至少一种前体蛋白质物质,所述前体蛋白质物质包含所述目的蛋白质和至少一种 通式X1-Tag-X2,其中X1和X2表示其侧链可以通过共价键酶联的氨基酸; 标记是能够结合时结合配偶体的氨基酸序列; (b)使所述前体与能够在X 1和X 2之间形成共价键的至少一种酶接触,从而引入包含Tag序列的分子内环结构; 和(c)分离得到的环化蛋白质物质。 还提供了可获得的蛋白质物质及其用途,例如用于制备肽文库。