阿拉比多普西斯阿尔戈诺特10 特别捕捉 miR166/165 来调节 射击 角美里系统发育
Hongliang Zhu1, Fuqu Hu, Ronghui Wang
1Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA.
Cell
|April 19, 2011
概括
阿拉比多普西斯的AGO10蛋白质作为miR166/165微RNA的诱,对于维持射击上性髓系统 (SAM) 至关重要. 这种相互作用阻止miR166/165抑制HD-ZIP III基因,确保适当的发育.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 发育生物学是发展生物学.
背景情况:
- 发芽的上干 (SAM) 对于植物生长至关重要,它维持了形成所有发芽器官的未分化细胞.
- 第三类HOMEODOMAIN-LEUCINE ZIPPER (HD-ZIP III) 转录因子指定SAM命运,并由miR166/165.5进行调节.
- 众所周知,AGO10对于Arabidopsis中SAM维护至关重要.
研究的目的:
- 研究AGO10在SAM中调节miR166/165活动中的特定作用.
- 阐明AGO10与miR166/165相互作用并影响SAM发育的机制.
主要方法:
- 研究了AGO10和miR166/165在Arabidopsis中的相互作用.
- 分析了miR166/165与AGO10.0双重关联的结构基础.
- 评估了改变miR166装入AGO10对SAM发展的影响.
- 对 miR166.6 的 AGO10 和 AGO1 的结合亲和力进行比较.
主要成果:
- AGO10 特别与 miR166/165 相互作用,通过独特的 miR166/165 双重结构进行介导.
- 由于miR166在AGO10中的负载不足,导致SAM有缺陷.
- AGO10的miRNA结合能力,而不是其催化活性,对于SAM的发展至关重要.
- 与AGO1.6相比,AGO10对miR166具有较高的结合亲和力,而AGO1.6则具有较高的结合亲和力.
结论:
- 在SAM中,AGO10作为miR166/165的诱分子.
- 这种诱机制阻止miR166/165抑制HD-ZIP III基因表达,从而保持SAM的完整性.
- AGO10的作用对于调节控制植物发芽发展的基因表达网络至关重要.
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