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    • 13. 发明授权
    • Methods for transforming and expression screening of filamentous fungal cells with a DNA library
    • 用DNA文库转化和表达筛选丝状真菌细胞的方法
    • US09045748B2
    • 2015-06-02
    • US11140150
    • 2005-05-26
    • Sarah TeterMichael LamsaJoel CherryConnie Ward
    • Sarah TeterMichael LamsaJoel CherryConnie Ward
    • C12N15/10C12N15/80C40B40/02
    • C12N15/1037C12N15/1086C12N15/80C40B40/02
    • The present invention relates to methods for expression screening of filamentous fungal transformants, comprising: (a) isolating single colony transformants of a DNA library introduced into E. coli; (b) preparing DNA from each of the single colony E. coli transformants; (c) introducing a sample of each of the DNA preparations of step (b) into separate suspensions of protoplasts of a filamentous fungus to obtain transformants thereof, wherein each transformant contains one or more copies of an individual polynucleotide from the DNA library; (d) growing the individual filamentous fungal transformants of step (c) on selective growth medium, thereby permitting growth of the filamentous fungal transformants, while suppressing growth of untransformed filamentous fungi; and (e) measuring activity or a property of each polypeptide encoded by the individual polynucleotides. The present invention also relates to isolated polynucleotides encoding polypeptides of interest obtained by such methods, to nucleic acid constructs, expression vectors, and recombinant host cells comprising the isolated polynucleotides, and to methods of producing the polypeptides encoded by the isolated polynucleotides.
    • 本发明涉及丝状真菌转化体的表达筛选方法,其包括:(a)分离导入大肠杆菌的DNA文库的单个菌落转化体; (b)从每个单个菌落的大肠杆菌转化体制备DNA; (c)将步骤(b)的每种DNA制剂的样品引入到丝状真菌的原生质体的分离悬浮液中以获得其转化体,其中每个转化体含有来自DNA文库的单个多核苷酸的一个或多个拷贝; (d)在选择性生长培养基上生长步骤(c)的单个丝状真菌转化体,从而允许丝状真菌转化体生长,同时抑制未转化的丝状真菌的生长; 和(e)测量由各个多核苷酸编码的每种多肽的活性或性质。 本发明还涉及通过这些方法获得的编码感兴趣的多肽的分离的多核苷酸,包括分离的多核苷酸的核酸构建体,表达载体和重组宿主细胞,以及由分离的多核苷酸编码的多肽的制备方法。