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    • 5. 发明申请
    • METHODS FOR PRODUCING PEPTIDES USING ENGINEERED INTEINS
    • 使用工程化产品生产胶囊的方法
    • WO2014191455A1
    • 2014-12-04
    • PCT/EP2014/061048
    • 2014-05-28
    • NOVO NORDISK A/S
    • SHAW, Allan ChristianNORRILD, Jens ChristianALBERTSEN, Louise
    • A61K38/22C07K14/575C07K7/00C12N15/09C12N15/62
    • C07K14/47C07K1/006C07K7/00C07K14/575C07K2319/00C07K2319/92C12N9/90C12N15/09C12N15/625
    • The present invention provides a method for producing peptides by recombinant means. The peptides are expressed as part of a fusion protein comprising the target peptide and an engineered intein. The invention also provides the engineered inteins, fusion proteins comprising these, and DNA constructs coding for these fusion proteins. Upon thiol-induced cleavage of the fusion protein the carboxy-terminal a-thioester of the target peptide is obtained. The carboxy-terminal α-thioester can in principle react with any nucleophile and the strategy therefore allows a wider range of carboxy-terminal modifications such as chemical ligation, bioconjugation, or amidation. The engineered inteins of the present invention are minimized in size and has a cysteine mutation in the position corresponding by alignment to position 3 of Mxe GyrA intein (SEQ ID NO:1 ) leading to increased expression levels of the fusion protein and higher yields of the isolated target peptide, thus making the method of the invention suitable for production scale.
    • 本发明提供了通过重组方法制备肽的方法。 肽被表达为包含靶肽和工程化内含肽的融合蛋白的一部分。 本发明还提供了工程化的内含肽,包含它们的融合蛋白以及编码这些融合蛋白的DNA构建体。 在硫醇诱导的融合蛋白切割时,获得了靶肽的羧基末端α-硫酯。 羧基末端α-硫酯可以原则上与任何亲核试剂反应,因此该策略允许更广泛的羧基末端修饰,如化学连接,生物共轭或酰胺化。 本发明的工程化内含子在尺寸上最小化,并且在对应于Mxe GyrA内含肽(SEQ ID NO:1)的位置3的对应位置处具有半胱氨酸突变,导致融合蛋白的表达水平升高,并且更高的产量 分离的靶肽,从而使本发明的方法适合于生产规模。