FKF1传递了光周期开花中CONSTANS稳定性的时间信息
Young Hun Song1, Robert W Smith, Benjamin J To
1Department of Biology, University of Washington, Seattle, WA 98195, USA.
Science (New York, N.Y.)
|May 26, 2012
概括
蛋白结合,凯尔奇重复,F-BOX 1 (FKF1) 蛋白质稳定长时间下午的CONSTANS (CO) 蛋白质. 此外,FKF1还可以去除抑制剂,促进植物的开花时间.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 摄影周期主义 (Photoperiodism) 是一种摄影周期主义.
背景情况:
- 植物的开花时间由日长调节,以优化繁殖.
- 康斯坦斯 (CO) 蛋白对于诱导阿拉比多普西斯在长日条件下开花至关重要.
- 长时间下午CO蛋白稳定的确切机制尚不清楚.
研究的目的:
- 在长日条件下,阐明CONSTANS (CO) 蛋白在下午稳定的分子机制.
- 确定参与CO稳定的关键蛋白质及其对开花时间的下游影响.
主要方法:
- 同免疫沉测试检测蛋白质与蛋白质相互作用.
- 酵母二杂交试验证实了FKF1和CO之间的相互作用.
- 对FT和CO的基因表达 (mRNA水平) 的分析.
主要成果:
- 结合黄素,凯尔奇重复,F-BOX 1 (FKF1) 蛋白被确定为一个关键因素稳定CO蛋白在下午.
- FKF1通过其LOV域与CO相互作用,这种相互作用被蓝光增强.
- FKF1促进循环DOF因子1 (CDF1) 的降解,这是CO和花T (FT) 转录的抑制剂.
结论:
- 通过稳定CO和去除转录抑制剂,FKF1在促进开花方面发挥了双重作用.
- FKF1集成光信号来控制CO蛋白水平和基因表达,确保精确的开花时间.
- 这些发现揭示了一种新的前机制,调节FT mRNA诱导和强大的开花控制.
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