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人类转化生长因子-α:大肠杆菌的前体结构和表达

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    科学领域:

    • 分子生物学分子生物学
    • 在瘤学瘤学.
    • 细胞生物学 细胞生物学

    背景情况:

    • 转化生长因子-α (TGF-α) 与人类瘤的发展有关.
    • TGF-α可以诱导非转化细胞系的可逆转化.

    研究的目的:

    • 为了分离和描述负责TGF-alpha生产的基因.
    • 为了研究成熟TGF-alpha的功能性质.

    主要方法:

    • 使用合成脱氧氧核类核酸作为探针,从人类基因组DNA库中分离TGF-alpha外基因.
    • 查了人类细胞癌细胞系的TGF-alpha mRNA,使用分离的外.
    • 从确定的细胞系中克隆TGF-alphacDNA,并将其表达为大肠杆菌.

    主要成果:

    • 成功分离了人类的TGF-alpha外因子,并确定了产生TGF-alphamRNA的细胞癌线.
    • 一个克隆的TGF-alpha cDNA编码了一个160氨基酸前体.
    • 成熟的50氨基酸TGF-α与表皮生长因子受体结合,并在正常细胞中诱导结独立.

    结论:

    • 这项研究成功地分离和表征了人类的TGF-alpha基因及其产物.
    • 成熟的TGF-alpha在细胞转化和通过表皮生长因子受体通路的定独立性中发挥着重要作用.