IL-21 production in prokaryotic hosts
    1.
    发明授权
    IL-21 production in prokaryotic hosts 有权
    原核生物中的IL-21产生

    公开(公告)号:US07250274B2

    公开(公告)日:2007-07-31

    申请号:US10735149

    申请日:2003-12-12

    IPC分类号: C12P21/02

    CPC分类号: C07K14/54

    摘要: The expression vectors and methods using an E. coli expression system for the large scale production of IL-21 are described. The vectors utilize the IL-21 coding sequence with specific changes in nucleotides in order to optimize codons and mRNA secondary structure for translation in E. coli. Using the expression vectors, the IL-21 gene was produced in E. coli to a level of greater than 1 g/L in fed batch fermentation. Also included are OmpT deficient E. coli strains transformed with an IL-21 expression vector.

    摘要翻译: 描述了用于大规模生产IL-21的大肠杆菌表达系统的表达载体和方法。 载体利用具有核苷酸特异性变化的IL-21编码序列,以优化用于大肠杆菌翻译的密码子和mRNA二级结构。 使用表达载体,在补料分批发酵中,在大肠杆菌中产生IL-21基因至大于1g / L的水平。 还包括用IL-21表达载体转化的OmpT缺陷型大肠杆菌菌株。

    Transformation of pichia methanolica
    9.
    发明授权
    Transformation of pichia methanolica 失效
    甲醇毕赤酵母的转化

    公开(公告)号:US5854039A

    公开(公告)日:1998-12-29

    申请号:US914066

    申请日:1997-07-14

    摘要: Methods for transforming Pichia methanolica, and DNA molecules useful in transformation of P. methanolica, are disclosed. P. methanolica cells are exposed, in the presence of DNA molecules, to a pulsed electric field having a field strength of from 2.5 to 4.5 kV/cm and a pulse duration of from 1 to 40 milliseconds, whereby the DNA molecules are introduced into the cells. The DNA molecules may comprise an expression unit that includes a transcription promoter of a P. methanolica gene operably linked to a segment encoding a polypeptide or protein of interest. The DNA molecules may also encode a selectable marker, such as a P. methanolica ADE2 gene. Cells transformed according to the invention may be used in production systems for the preparation of proteins of commercial importance.

    摘要翻译: 公开了用于转化甲醇毕赤酵母和用于甲醇转化甲醇的DNA分子的方法。 在DNA分子存在下将甲醇状细胞暴露于场强为2.5〜4.5kV / cm,脉冲持续时间为1〜40毫秒的脉冲电场,由此将DNA分子引入 细胞。 DNA分子可以包含表达单元,其包括可操作地连接到编码感兴趣的多肽或蛋白质的区段的甲醇咖啡基因的转录启动子。 DNA分子还可以编码选择性标记,例如甲醇白葡萄酒ADE2基因。 根据本发明转化的细胞可用于制备具有商业重要性的蛋白质的生产系统中。