一个逆转录病毒瘤基因,akt,编码一种含有SH2类区域的氨酸-氨酸激酶
A Bellacosa1, J R Testa, S P Staal
1Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111.
概括
这种v-akt瘤基因编码了一种与C相关的蛋白质激酶-氨酸-氨酸激酶. 这种激酶可能会连接氨酸和氨酸-氨酸酸化通路,这表明一种新的信号机制.
科学领域:
- 分子生物学分子生物学
- 瘤基因是一种瘤基因.
- 信号传输 信号传输
背景情况:
- 众所周知,v-akt瘤基因编码的是一个融合蛋白.
- 细胞同类的v-akt在各种组织中表达,特别是胸腺.
研究的目的:
- 为了描述v-akt瘤基因产品.
- 为了研究v-akt蛋白的激酶活性和细胞局部.
- 探索氨酸和氨酸-氨酸酸化之间的潜在联系.
主要方法:
- 对v-akt瘤基因进行序列分析.
- 对v-akt蛋白质产品的生物化学表征.
- 将Akt的调节区域与已知的激酶域进行比较.
主要成果:
- 这种v-akt瘤基因产物是一种105千多达尔的氨酸-氨酸激酶,与蛋白质激酶C相关.
- 阿克特的细胞同类物被广泛表达,其最高水平在甲状腺中.
- 阿克特具有类似于Src同质-2域的调节区域,通常在氨酸激酶中发现.
结论:
- Akt作为一种氨酸-氨酸激酶,在蛋白质-蛋白质相互作用中具有潜在的作用.
- 与Src同样性-2域的结构相似性表明,Akt可能是突素和氨酸-氨酸激酶信号通路的桥梁.
- 这一发现突出了细胞信号传递和瘤发生的潜在新机制.
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