Selection of host cells expressing protein at high levels
    10.
    发明申请
    Selection of host cells expressing protein at high levels 审中-公开
    选择高水平表达蛋白质的宿主细胞

    公开(公告)号:US20110300580A1

    公开(公告)日:2011-12-08

    申请号:US13135966

    申请日:2011-07-18

    摘要: Described is a DNA molecule comprising an open reading frame sequence that encodes a selectable marker polypeptide, wherein the DNA molecule in the coding strand comprises a translation start sequence for the selectable marker polypeptide having a GTG start codon or a TTG start codon, and wherein the ORF sequence that encodes the selectable marker protein has been mutated to replace at least half of its CpG dinucleotides as compared to the native ORF sequence that encodes the selectable marker protein. Further provided are such DNA molecules wherein the ORF sequence that encodes a selectable marker polypeptide is part of a multicistronic transcription unit that further comprises an open reading frame sequence encoding a polypeptide of interest. Also described are methods for obtaining host cells expressing a polypeptide of interest, wherein the host cells comprise the DNA molecules described herein. Further provided is the production of polypeptides of interest, comprising culturing host cells comprising the DNA molecules described herein.

    摘要翻译: 描述了包含编码可选择标记多肽的开放阅读框序列的DNA分子,其中编码链中的DNA分子包含具有GTG起始密码子或TTG起始密码子的可选择标记多肽的翻译起始序列,其中 与编码可选择标记蛋白的天然ORF序列相比,编码可选择标记蛋白的ORF序列已被突变以替代其至少一半的CpG二核苷酸。 还提供了这样的DNA分子,其中编码可选择标记多肽的ORF序列是多顺反子转录单位的一部分,其进一步包含编码目标多肽的开放阅读框序列。 还描述了获得表达目的多肽的宿主细胞的方法,其中宿主细胞包含本文所述的DNA分子。 还提供感兴趣的多肽的生产,包括培养包含本文所述的DNA分子的宿主细胞。