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    • 9. 发明申请
    • SINGLE PROTEIN PRODUCTION IN LIVING CELLS FACILITATED BY A MESSENGER RNA INTERFERASE
    • 生物细胞中的单蛋白生产由信使RNA干扰素
    • US20100035346A1
    • 2010-02-11
    • US11750314
    • 2007-05-17
    • Masayori InouyeJunjie ZhangMotoo Suzuki
    • Masayori InouyeJunjie ZhangMotoo Suzuki
    • C12N15/74C12N1/21
    • C12N9/22C12N15/67C12N15/74
    • The present invention describes a single-protein production (SPP) system in living E. coli cells that exploits the unique properties of an mRNA interferase, for example, MazF, a bacterial toxin that is a single stranded RNA- and ACA-specific endoribonuclease, which efficiently and selectively degrades all cellular mRNAs in vivo, resulting in a precipitous drop in total protein synthesis. Concomitant expression of MazF and a target gene engineered to encode an ACA-less mRNA results in sustained and high-level (up to 90%) target expression in the virtual absence of background cellular protein synthesis. Remarkably, target synthesis continues for at least 4 days, indicating that cells retain transcriptional and translational competence despite their growth arrest. SPP technology works well for yeast and human proteins, even a bacterial integral membrane protein. This novel system enables unparalleled signal to noise ratios that should dramatically simplify structural and functional studies of previously intractable but biologically important proteins. The present invention also provides an optimized condensed single protein production system.
    • 本发明描述了利用mRNA干扰酶的独特性质的活的大肠杆菌细胞中的单蛋白质生产(SPP)系统,例如MazF,单链RNA-和ACA特异性内切核糖核酸酶的细菌毒素, 其有效和选择性地降解体内所有细胞mRNA,导致总蛋白质合成的急剧下降。 MazF和旨在编码无ACA mRNA的靶基因的伴随表达导致在虚拟无背景细胞蛋白质合成中的持续和高水平(高达90%)的靶表达。 值得注意的是,目标合成持续至少4天,表明细胞保留转录和翻译能力,尽管其生长停滞。 SPP技术适用于酵母和人类蛋白质,甚至细菌整合膜蛋白。 这种新颖的系统能够实现无与伦比的信噪比,这将显着简化以前难以处理但生物重要的蛋白质的结构和功能研究。 本发明还提供优化的冷凝单蛋白生产系统。