ErbB2类似于一种自身抑制的无脊椎动物表皮生长因子受体
Diego Alvarado1, Daryl E Klein, Mark A Lemmon
1Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, 809C Stellar-Chance Laboratories, 422 Curie Boulevard, Philadelphia, Pennsylvania 19104-6059, USA.
Nature
|September 1, 2009
概括
孤儿受体氨酸激酶ErbB2 (HER2) 可能受到类似于Drosophila melanogaster EGFR (dEGFR) 的配体的调节. 这一发现挑战了ErbB2缺乏自身抑制的概念,并为癌症提供了新的治疗点.
科学领域:
- 分子生物学分子生物学
- 结构生物学是结构生物学.
- 癌症研究 癌症研究
背景情况:
- ErbB2 (HER2) 是一种瘤受体氨酸激酶,是癌症治疗的关键治疗标.
- 以前的模型表明ErbB2的致癌信号源于缺乏其他ErbB受体中存在的自身抑制.
- 对于ErbB2独特的信号和监管的结构基础仍然不清楚.
研究的目的:
- 研究ErbB2信号的结构和调节机制.
- 为了比较ErbB2调节与其最接近的结构亲属,Drosophila melanogaster EGFR (dEGFR).
- 重新评估ErbB2.2的自身抑制模型.
主要方法:
- 对ErbB2和dEGFR进行比较结构分析.
- 基因和生物化学测试研究dEGFR通过配体的调节.
- 对dEGFR的晶体结构的确定.
主要成果:
- 尽管dEGFR缺乏正规的带,但它受到生长因子连接体的严格调节.
- 一组独特的域间相互作用使得未结合的dEGFR保持不活跃状态.
- 这些自身抑制相互作用在ErbB2中被保留和扩展,这与自身抑制的缺失相矛盾.
结论:
- 存在ErbB2自身抑制,并且可能通过类似于dEGFR的配体进行调节.
- 挑战了ErbB2缺乏自身抑制的既定模型.
- 这些发现为ErbB2调节和ErbB2驱动癌症的潜在治疗策略提供了新的见解.
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