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    • 7. 发明授权
    • Recombinant expression vector for animal cell
    • 动物细胞重组表达载体
    • US08426570B2
    • 2013-04-23
    • US13002814
    • 2009-07-07
    • Keun Soo KimHye Kyung JuChoon Ju JeonJae Seob Kim
    • Keun Soo KimHye Kyung JuChoon Ju JeonJae Seob Kim
    • C07H21/02C07H21/04C12N5/00C12N5/02C12N15/00
    • C12N15/85C12N9/003C12N15/8509C12N2800/107
    • The present invention relates to a recombinant expression vector for an animal cell containing a dihydrofolate reductase (DHFR) coding nucleotide sequence operatively linked to a DHFR promoter, to an animal cell line transformed by the vector, and to a method for preparing a target protein using the same. As compared with existing animal cell expression vectors, the vector of the present invention enables an effective screening of a cell line clone in which foreign genes are amplified together with DHFR genes even at a much lower methotrexate concentration. The present invention exhibits excellent effects in cell line preparation as high-productivity cell lines can be ensured in a short time through the use of a lower concentration of methotrexate in the process of protein production cell line establishment.
    • 本发明涉及用于动物细胞的重组表达载体,其含有编码与DHFR启动子有效连接的二氢叶酸还原酶(DHFR)的核苷酸序列,与载体转化的动物细胞系,以及使用 一样。 与现有的动物细胞表达载体相比,本发明的载体能够有效筛选外源基因与DHFR基因一起扩增的细胞系克隆,即使在低得多的甲氨蝶呤浓度下也是如此。 本发明在蛋白质生产细胞系建立过程中通过使用较低浓度的甲氨蝶呤可以在短时间内确保高生产率细胞系,从而在细胞系制备中表现出优异的效果。