MuB 蛋白质通过菌体 Mu 的转酶,以全oster 的方式激活链转移
T A Baker1, M Mizuuchi, K Mizuuchi
1Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892.
Cell
|June 14, 1991
概括
菌体的MuA和MuB蛋白质有助于有效的DNA转换. MuB 蛋白激活 MuA 转基因酶,增强 DNA 整合到目标部位,即使 MuB 不与 DNA 结合.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 遗传学 是一个遗传学.
背景情况:
- 菌体Mu是DNA转移的一个研究完善的模型.
- MuA (转移酶) 和MuB蛋白对于Mu基因组集成至关重要.
- 了解MuA和MuB之间的相互作用是阐明转换机制的关键.
研究的目的:
- 研究 MuB 蛋白在刺激 MuA 介导的 DNA 转换中的作用.
- 确定对MuA-MuB相互作用及其对线程转移的影响的具体要求.
- 分析MuB的DNA结合状态对转移期间目标部位选择的影响.
主要方法:
- 生物化学试验用于研究MuA和MuB之间的蛋白质-蛋白质相互作用.
- 试管体内转换试验用于测量链转移效率.
- 在MuA和MuB度和MuB修饰的不同条件下对DNA目标部位利用的分析.
主要成果:
- MuB蛋白直接与MuA转体酶的C端域相互作用,激活了链转移.
- 即使不与DNA结合,MuB也会刺激转化,这表明激活是独立于向DNA结合的.
- 在MuB无法结合DNA的条件下,转移仅使用分子内点,因为它们相邻.
结论:
- MuA-MuB相互作用对于高效的菌体Mu DNA转移至关重要.
- MuB激活MuA的能力可以从其DNA结合功能中分离出来.
- 当MuB的DNA结合受损时,以近距离驱动的目标部位选择,特别是分子内部位,是最受欢迎的.
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