细胞循环调节与腺病毒蛋白E1A相关的素H1激酶活性
A Giordano1, J H Lee, J A Scheppler
1Freeman Laboratory of Cancer Cell Biology, Cold Spring Harbor Laboratory, NY 11724.
概括
腺病毒E1A蛋白与细胞蛋白结合,包括视网膜母细胞瘤蛋白 (pRb) 和环素A. 新发现表明E1A还与p34cdc2相关蛋白质复合,表现出细胞周期调节的激酶活性.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 腺病毒早期区域1A (E1A) 蛋白质对于病毒复制和细胞转化至关重要.
- 已知E1A蛋白与各种细胞蛋白形成稳定的复合体.
研究的目的:
- 识别与腺病毒E1A相互作用的新型细胞蛋白质.
- 描述E1A相关蛋白质复合物的功能性质.
主要方法:
- 同免疫沉测试检测蛋白质与蛋白质相互作用.
- 激酶测试以确定E1A复合物的酶活性.
主要成果:
- 发现与E1A相互作用的两种以前未知的细胞蛋白与p34cdc2.2.有关.
- 与E1A相关的复合体显示了基因素H1特异性激酶活性.
- 这种激酶活性在整个细胞分裂周期中被调节.
结论:
- 腺病毒E1A与p34cdc2相关的蛋白质相互作用,这表明它在细胞循环调节中的作用.
- 观察到的激酶活性独立于与E1A结合的视网膜母细胞瘤蛋白 (pRb).
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