1 / 8

第九章 光形态建成

第九章 光形态建成. 第三节 光敏色素的作用机制 信号  受体  反应. 光敏色素介导的信号传递途径 （ 1 ）信号传递成分 ● 光敏色素相互作用因子 ——Phytocrome interacting factors (PIFs) – PIF3 ： Phytocrome interacting factors 3 – NDPK2 ： Nucleotide diphosphate kinase-2 – PKS1 ： Phytocrome kinase substrate-1 – IAA/AXR family proteins

sidney
Download Presentation

第九章 光形态建成

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 第九章 光形态建成

  2. 第三节 光敏色素的作用机制 信号受体反应

  3. 光敏色素介导的信号传递途径 • （1）信号传递成分 • ● 光敏色素相互作用因子——Phytocrome interacting • factors (PIFs) • – PIF3： Phytocrome interacting factors 3 • – NDPK2：Nucleotide diphosphate kinase-2 • – PKS1： Phytocrome kinase substrate-1 • – IAA/AXR family proteins • ● Second messengers • – G protein • – Ca2+

  4. （2）信号传递事件（Signal transduction events） ● 光诱导的光敏色素构象变化——光敏色素信号传递 的启动步骤 – 色素的异构化 – 蛋白构象的改变 ● 自体磷酸化 ● 光敏色素与PIFs结合及在核-质间重新分布 ● 形成nucleus speckle

  5. （3）信号传递途径（Signal transduction pathways） ● Ca2+/cGMP途径：光敏色素活化后诱发细胞 质中的Ca2+、cGMP信号传递级联途径 ● 作为激酶：光敏色素具有激酶结构域 ● 直接转录激活途径：活化的光敏色素可以转 移到核内，与转录因子作用，调节基因表达

More Related