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Published on: March 10, 2020
FTDP-17突变物对圆形RNA的影响
Giorgi Margvelani1, Justin R Welden2, Andrea Arizaca Maquera1
1Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.
前性痴呆的突变会影响微管相关蛋白 (MAPT) 循环RNA (circRNA) 的形成和翻译. 编辑RNA显著影响circRNA表达和蛋白质生产,突出显示它们在疾病中的作用.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 前性痴呆症 (FTD) 与微管相关蛋白 (MAPT) 基因的突变有关.
- 特定的MAPT突变,特别是在第7和第13个外显子之间,可能会通过替代背接影响圆形RNAs (circRNAs) 的形成.
- 循环RNA正在成为基因表达和疾病的关键调节者.
研究的目的:
- 调查前性痴呆症-17 (FTDP-17) 突变对MAPT环RNA形成和翻译的影响.
- 确定ADAR酶,特别是ADAR1-p150在circTauRNA编辑和翻译中的作用.
- 探索circTau蛋白与细胞因子,如真核细胞启动因子4B (eIF4B) 的相互作用.
主要方法:
- 对代表性FTDP-17 MAPT突变体进行分析,以评估circRNA形成 (127和1210).
- 研究了ADAR1-p150对circTauRNA表达和翻译的影响.
- 研究了127 circTau蛋白与eIF4B之间的相互作用,以及特定突变对这种相互作用的影响.
主要成果:
- 五种FTDP-17突变增加了127环RNA的形成;三种增加了1210环RNA.
- 编辑ADAR1-p150显著影响circTau RNA的表达,减少127,但增加1210 circRNA.
- ADAR活性强烈促进circTau RNA转化,127circTau蛋白与eIF4B相互作用,这种相互作用因某些突变而减少.
结论:
- MAPT点突变可以改变circRNA表达水平,可能通过mRNA前的结构变化.
- RNA编辑,特别是ADAR1-p150的编辑,在circTau RNA翻译中起着至关重要的作用,经常超过突变的影响.
- 循环RNA及其编辑状态是理解FTDP-17病原学的重要考虑因素.
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