学术沙龙

学术沙龙第八期:植物光受体UVR8蛋白介导的光信号转导机理

发布时间:2021-03-10  阅读次数:4102

 

报 告 人:尹若贺   农生学院植物科学系 长聘教轨副教授 博导 PI

   间:2021年3月17日 (星期三) 12:45-13:30

   点:农生学院创新楼(B楼)104会议室

主办单位:农生学院学科与科技办、农生学院青年教师联谊会

 

 

报告题目:

植物光受体UVR8蛋白介导的光信号转导机理

报告摘要:

光信号是一种重要的环境因子调控植物的发育、代谢和抗逆。植物通过光受体蛋白感知光信号,通过信号转导过程调控植物的多种生理学过程,提高植物对环境的适应性。目前高等植物中已经被鉴定的主要光受体包括红光/远红光受体、蓝光受体以及紫外光UV-B受体。其中,UVR8蛋白是最新被鉴定的一个高等植物光受体。近年来,UVR8蛋白的作用机理研究取得了一系列重要进展,报告将会讨论UVR8的一些主要功能和生化机理。

报告人简介:

获华中农业大学园艺学学士/硕士学位、慕尼黑大学博士学位(2010年),2011-2017年日内瓦大学从事博士后研究,2017年入职农生学院。

【PI学科组研究方向】:

光信号调控番茄/拟南芥苗期发育;

光信号调控番茄果实代谢;

光信号调控植物生物/非生物逆境响应。

【代表性著作】: 

  1. Lin, L., Dong, H., Yang, G., and Yin, R*. (2020). The C-terminal 17 amino acids of the photoreceptor UVR8 is involved in the fine-tuning of UV-B signaling. J Integr Plant Biol 62, 1327-1340. (٭Correspondence author)
  2. Lin L, Liu XR, Yin R٭(2018)PIF3 Integrates Light and Low Temperature Signaling. Trends Plant Sci., 23:93-95. (٭Correspondence author)
  3. Yin, R., Skvortsova, M.Y., Loubéry, S., and Ulm, R. (2016) COP1 is required for UV-B–induced nuclear accumulation of the UVR8 photoreceptor. Proc. Natl. Acad. Sci. USA 113: E4415-E4422.
  4. Yin, R., Arongaus, A.B., Binkert, M., and Ulm, R. (2015) Two distinct domains of the UVR8 photoreceptor interact with COP1 to initiate UV-B signaling in Arabidopsis. Plant Cell 27: 202-213.

ACADEMIC SALON (VIII)

SPEAKER: Ruohe Yin

Tenure-track Associate Professor, Principal Investigator

Department of Plant Science, School of Agriculture and Biology

TIME :12:45-13:30  March 17, 2021

VENUE:Room 104, Building B, School of Agriculture and Biology

ORGANIZER:Office of Discipline and Science & Technology, SAB;

Young Teachers Association, SAB

TITLE:Mechanisms for photoreceptor UVR8-mediated signaling in plants

ABSTRACT:

The ultraviolent-B (UV-B) radiation is an integral component of solar radiation on earth surface. UVR8 was characterized as a UV-B photoreceptor that can regulate a series of physiological process in plants, ranging from seedling de-etiolation to flowering. In addition, UVR8 can also regulate phototropism and tolerance to biotic and abiotic stresses. UVR8 proteins are distributed in both cytosol and nucleus. Through manipulation the subcellular localization of UVR8, it was shown that nuclear localization is a prerequisite for the key functions of UVR8. UV-B promotes UVR8 protein accumulation in nucleus, where it interacts with its protein partners including several known transcription factors to regulate gene transcription and photomorphogenesis. Thus, examination the mechanisms for the UV-B-induced UVR8 accumulation in nucleus is critical for the understanding of early UV-B signaling events. In response to UV-B, UVR8 homodimers dissociate into monomers. Monomeric UVR8 interacts with COP1. Moreover, UVR8-mediated UV-B signaling requires COP1. Previously, we reported that COP1 is required for UV-B-induced UVR8 accumulation in nucleus [3]. However, the working mechanisms for COP1 in this process is not known. We performed a series of experiments including FRAP to test the possible working mechanisms of COP1, including mediating UVR8 nuclear import and preventing UVR8 nuclear export. The possible mechanisms of UV-B-induced UVR8 accumulation in nucleus and the relevant function of COP1 will be discussed.

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