通过REST降解,SCFbeta-TRCP控制瘤转化和神经分化
Thomas F Westbrook1, Guang Hu, Xiaolu L Ang
1Howard Hughes Medical Institute, Department of Genetics, Harvard Partners Center for Genetics and Genomics, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA.
Nature
|March 21, 2008
概括
RE1沉默转录因子 (REST) 被SCF (β-TRCP) 复合体降解,这是神经分化的一个关键步骤. 这一途径也与β-TRCP驱动的癌症发展有关.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- RE1抑制转录因子 (REST) 抑制神经元基因表达,并在上皮组织中起到瘤抑制作用.
- 了解REST调节对于其生理和病理作用至关重要.
- 控制REST稳定性的路径以前是未知的.
研究的目的:
- 阐明控制REST稳定性的监管途径.
- 为了识别负责REST降解的E3泛素连酶.
- 研究REST降解在神经分化和癌症中的作用.
主要方法:
- RNA干扰 (RNAi) 屏幕用于识别E3泛素合酶.
- 生物化学测试以确认蛋白质相互作用和无处不在.
- 细胞分化试验和瘤转化研究.
主要成果:
- 通过SCF ((β-TRCP) E3泛因酶,通过泛因介导的蛋白解调节REST.
- β-TRCP与REST结合并无处不在,通过光降解向其降解.
- 对于β-TRCP依赖的神经分化,REST降解是必不可少的.
- 贝塔-TRCP过度表达通过降低REST来促进瘤性转化.
结论:
- 这种SCF (β-TRCP) 复合体是降解REST的E3泛基因酶.
- 贝塔-TRCP介导的REST降解是神经发生的一个关键步骤.
- 贝塔-TRCP-REST轴在发育和癌症中都代表了一个新的调节途径.
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