纯化成熟促进因子酸化物pp60c-src在纤维细胞突变过程中酸化的部位
S Shenoy1, J K Choi, S Bagrodia
1Department of Molecular and Cell Biology, Pennsylvania State University, University Park 16802.
Cell
|June 2, 1989
概括
的pp60c-src通过成熟促进因子 (MPF) 在特定部位经历了新的线粒体酸化. 这种改变的酸化解释了pp60c-src.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 过度表达的pp60c-src在NIH 3T3细胞分裂过程中表现出改变的移动性和酸化.
- 线粒体酸化对于调节细胞过程和蛋白质功能至关重要.
研究的目的:
- 在pp60c-src.src上识别新的线粒体酸化位.
- 调查成熟促进因子 (MPF) 在线粒分裂期间pp60c-src酸化中的作用.
- 要确定改变的酸化是否解释了观察到的pp60c-src流动性的变化.
主要方法:
- 对pp60c-src的局部定向突变发生和酸化分析.
- 在Xenopus蛋中使用纯化的MPF进行了体外酸化试验.
- 电泳移动转移测试以评估酸化的影响.
主要成果:
- 在pp60c-src上在Thr 34,Thr 46和Ser 72发现了新的线粒体酸化.
- 这些部位被MPF识别,MPF是p34cdc2.2.的催化子单元.
- 在这些部位的pp60c-src的MPF介导酸化足以引起观察到的电泳运动迟缓.
- 线性pp60c-src的脱化恢复了它的正常移动性.
结论:
- pp60c-src是在线索分裂期间是MPF的直接目标.
- 由MPF诱导的pp60c-src酸化有助于在线粒分裂过程中观察到的细胞变化.
- 这些发现提供了对pp60c-src活性调节及其在线索性进展中的作用的见解.
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