会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Inducible expression system
    • 诱导表达系统
    • US06432705B1
    • 2002-08-13
    • US09566660
    • 2000-05-08
    • Jiing-Kuan YeeTheodore FriedmannShin-Tai Chen
    • Jiing-Kuan YeeTheodore FriedmannShin-Tai Chen
    • C12N500
    • C12N15/86C12N2740/13043C12N2830/002C12N2830/006C12N2840/20C12N2840/203
    • The present invention features compositions and methods for the inducible expression of a polypeptide, especially a polypeptide normally cytotoxic to the eukaryotic host cell in which it is to be expressed. A nucleotide sequence encoding a polypeptide of interest is operably linked to an inducible promoter. Expression from the inducible promoter is regulated by a multi-chimeric transactivating factor, composed of a first ligand-binding domain that negatively regulates transcription, a transcriptional activation domain, and a second ligand-binding domain that positively regulates the transcriptional activation function of the transactivator. Transcription of the nucleotide sequence under control of the inducible promoter is activated by the multi-chimeric transactivator when both the ligand that binds the first ligand-binding domain is absent and the ligand that binds the second ligand-binding domain is present. This inducible expression system is particularly useful in the expression of the cytotoxic protein VSV G for the production of pseudotyped retroviral vectors.
    • 本发明的特征在于可诱导表达多肽的组合物和方法,特别是对待其表达的真核宿主细胞通常具有细胞毒性的多肽。 编码目的多肽的核苷酸序列与诱导型启动子可操作地连接。 来自诱导型启动子的表达由多嵌合反式激活因子调节,所述多嵌合反式激活因子由负调节转录的第一配体结合结构域,转录激活结构域和正调节反式激活因子的转录激活功能的第二配体结合结构域组成 。 当两个结合第一配体结合结构域的配体和不存在结合第二配体结合结构域的配体时,多重嵌合反式激活剂可激活在诱导型启动子控制下的核苷酸序列的转录。 这种诱导表达系统特别可用于细胞毒素蛋白VSV G的表达以产生假型逆转录病毒载体。
    • 2. 发明授权
    • Inducible expression system
    • 诱导表达系统
    • US6133027A
    • 2000-10-17
    • US693940
    • 1996-08-07
    • Jiing-Kuan YeeTheodore FriedmannShin-Tai Chen
    • Jiing-Kuan YeeTheodore FriedmannShin-Tai Chen
    • C12N15/867C12N15/85C12N15/86
    • C12N15/86C12N2740/13043C12N2830/002C12N2830/006C12N2840/20C12N2840/203
    • The present invention features compositions and methods for the inducible expression of a polypeptide, especially a polypeptide normally cytotoxic to the eukaryotic host cell in which it is to be expressed. A nucleotide sequence encoding a polypeptide of interest is operably linked to an inducible promoter (e.g, a promoter composed of a minimal promoter linked to multiple copies of tetO, the binding site for the tetracycline repressor (tetR) of the Escherichia coli tetracycline resistance operon Tn10). Expression from the inducible promoter is regulated by a multi-chimeric transactivating factor, composed of a first ligand-binding domain that negatively regulates transcription (e.g., a prokaryotic tetracycline repressor polypeptide), a transcriptional activation domain, and a second ligand-binding domain that positively regulates the transcriptional activation function of the transactivator (e.g., a ligand-binding domain of a steroid receptor, preferably an estrogen receptor (ER)). Transcription of the nucleotide sequence under control of the inducible promoter is activated by the multi-chimeric transactivator when both the ligand that binds the first ligand-binding domain (e.g., tetracycline) is absent and the ligand that binds the second ligand-binding domain (e.g., a steroid) is present. This inducible expression system is particularly useful in the expression of the cytotoxic protein VSV G for the production of pseudotyped retroviral vectors.
    • 本发明的特征在于可诱导表达多肽的组合物和方法,特别是对待其表达的真核宿主细胞通常具有细胞毒性的多肽。 编码感兴趣多肽的核苷酸序列可操作地连接到诱导型启动子(例如,由连接至多拷贝tetO的最小启动子,大肠杆菌四环素抗性操纵子Tn10的四环素阻遏物(tetR)的结合位点, )。 来自诱导型启动子的表达由多嵌合反式激活因子调节,所述多嵌合反式激活因子由负调节转录的第一配体结合结构域(例如原核四环素阻遏物多肽),转录激活结构域和第二配体结合结构域组成 正调节反式激活因子的转录激活功能(例如,类固醇受体的配体结合结构域,优选雌激素受体(ER))。 当结合第一配体结合结构域(例如四环素)的配体和结合第二配体结合结构域的配体两者都可以通过多嵌合反式激活因子激活受诱导型启动子控制下的核苷酸序列的转录( 例如,类固醇)存在。 这种诱导表达系统特别可用于细胞毒素蛋白VSV G的表达以产生假型逆转录病毒载体。
    • 3. 发明授权
    • Packaging cell lines for pseudotyped retroviral vectors
    • 包装用于假型逆转录病毒载体的细胞系
    • US5739018A
    • 1998-04-14
    • US694652
    • 1996-08-07
    • Atsushi MiyanoharaJiing-Kuan YeeShin-Tai ChenCharles Edward PrussakTheodore Friedmann
    • Atsushi MiyanoharaJiing-Kuan YeeShin-Tai ChenCharles Edward PrussakTheodore Friedmann
    • C12N15/63C12N15/867C12N5/10C12N15/86
    • C12N15/86C12N15/635C12N2740/13052C12N2830/002C12N2830/006C12N2830/15C12N2830/30C12N2840/20C12N2840/203
    • The present invention features packaging cell lines and recombinant retroviral particles produced thereby, particularly pseudotyped retroviral particles. Preferably, the packaging cell lines are derived from HeLa, Cf2Th, D17, MDCK, or BHK cells, most preferably from Cf2Th cells. Retroviral particles are produced by inducibly expressing an envelope protein of interest (e.g., a retroviral envelope or the envelope protein of vesicular stomatitis virus (VSV G)). Inducible expression of the envelope protein is accomplished by operably linking an envelope protein-encoding nucleotide sequence to an inducible promoter (e.g., a promoter composed of a minimal promoter linked to multiple copies of tetO, the binding site for the tetracycline repressor (tetR) of the Escherichia coli, tetracycline resistance operon Tn10). Expression from the inducible promoter is regulated by a multi-chimeric transactivating factor, composed of a first ligand-binding domain that negatively regulates transcription from the inducible promoter (e.g., a prokaryotic tetracycline repressor polypeptide (tetR)), a transcriptional activation domain, and a second ligand-binding domain (e.g., a ligand-binding domain of a steroid receptor, preferably an estrogen receptor (ER)).
    • 本发明的特征在于包装细胞系和由此产生的重组逆转录病毒颗粒,特别是假型逆转录病毒颗粒。 优选地,包装细胞系衍生自HeLa,Cf2Th,D17,MDCK或BHK细胞,最优选来自Cf2Th细胞。 逆转录病毒颗粒通过诱导表达感兴趣的包膜蛋白(例如,逆转录病毒包膜或水泡性口炎病毒的包膜蛋白(VSV G))产生。 通过将包膜蛋白编码核苷酸序列可操作地连接到诱导型启动子(例如,由与tetO的多拷贝连接的最小启动子,四环素阻遏物(tetR)的结合位点)组成的启动子来实现包膜蛋白的诱导表达 大肠杆菌,四环素抗性操纵子Tn10)。 来自诱导型启动子的表达由多嵌合反式激活因子调节,所述多嵌合反式激活因子由负调节来自诱导型启动子的转录的第一配体结合结构域(例如,原核四环素阻遏物多肽(tetR)),转录激活结构域和 第二配体结合结构域(例如,类固醇受体的配体结合结构域,优选雌激素受体(ER))。