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    • 8. 发明申请
    • Method and kit for expressing protein under regulation of the expression from repeated sequence formed by gene amplification, and transformant
    • 用于通过基因扩增形成的重复序列表达调控表达蛋白质的方法和试剂盒,以及转化体
    • US20080032341A1
    • 2008-02-07
    • US11889512
    • 2007-08-14
    • Noriaki Shimizu
    • Noriaki Shimizu
    • C12P21/00C12N5/10
    • C12N15/67C12N15/85C12N2810/85C12N2820/85C12P21/02
    • A method is disclosed for releasing the transcriptional regulation caused by a repeated sequence in a gene, a kit therefor and so on to thereby establish a system capable of producing a protein in a large amount. At least one embodiment of the method can be achieved by any one or more of the following methods: (a) in the amplification of a gene encoding a target protein, co-amplifying a polynucleotide of 10 kbp or more such as a α-phage DNA or an insulator sequence; (b) selecting by culturing cells having undergone gene amplification in media containing a drug with a gradual increase in concentration; (c) elevating the promoter activity of inducing the expression of a gene encoding a target protein; (d) excising an amplified gene region from a chromosome with the use of Cre-LoxP System; (e) treating cells having undergone gene amplification with 5-aza-2′-deoxycytidine to thereby lower the methylation degree of DNA; and (f) selecting the mammalian cells having undergone gene amplification on double minute chromosomes.
    • 公开了一种用于释放由基因中的重复序列引起的转录调控的方法,其用于其的试剂盒等,从而建立能够大量产生蛋白质的系统。 该方法的至少一个实施方案可以通过以下任何一种或多种方法来实现:(a)扩增编码靶蛋白的基因,共扩增10kbp或更多的多核苷酸,例如α-噬菌体 DNA或绝缘子序列; (b)通过培养在具有逐渐增加浓度的药物的培养基中培养经历基因扩增的细胞进行选择; (c)提高诱导编码靶蛋白的基因表达的启动子活性; (d)使用Cre-LoxP系统从染色体切除扩增的基因区域; (e)处理已经用5-氮杂-2'-脱氧胞苷进行基因扩增的细胞,从而降低DNA的甲基化程度; 和(f)选择在双分子染色体上经历基因扩增的哺乳动物细胞。