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Position: Home > Articles > Function Analysis of PRP8 Gene of Regulating Cryptochrome CRY2 in Arabidopsis Current Biotechnology 2019 (2) 169-177

拟南芥隐花色素CRY2调控因子PRP8基因的功能分析

作  者:
郭亚蓉;王艳艳;刘军;裴雁曦
单  位:
中国农业科学院作物科学研究所;山西大学生命科学学院
关键词:
蓝光受体;蛋白降解;开花时间;下胚轴;PRP8
摘  要:
植物通过光受体感受外界环境的光信号来调节自身的生长发育。隐花色素CRY1和CRY2是拟南芥(Arabidopsis)中主要的蓝光受体,其中CRY2在蓝光条件下发生降解,但其分子机制尚不清楚。通过筛选EMS诱变的突变体库,获得了一个早花突变体。该突变体中CRY2蛋白大量积累但CRY1蛋白水平不受影响,因此将它命名为mac1(more abundant of cry2 1)。图位克隆与CRISPR-Cas9敲除实验表明,MAC1是PRP8基因的等位基因,该突变体被命名为prp8-11。定量PCR结果显示,CRY2 mRNA表达量在prp8-11突变体中低于野生型中的表达量。这说明CRY2蛋白降解变慢不是由于基因表达增多引起的。研究结果为进一步了解PRP8基因的功能及其在光信号网络系统中的作用提供了依据。
译  名:
Function Analysis of PRP8 Gene of Regulating Cryptochrome CRY2 in Arabidopsis
作  者:
GUO Yarong;WANG Yanyan;LIU Jun;PEI Yanxi;College of Life Sciences, Shanxi University;Institute of Crop Sciences, Chinese Academy of Agricultural Sciences;
单  位:
GUO Yarong%WANG Yanyan%LIU Jun%PEI Yanxi%College of Life Sciences, Shanxi University%Institute of Crop Sciences, Chinese Academy of Agricultural Sciences
关键词:
cryptochrome;;protein degradation;;flowering time;;hypocotyls;;PRP8
摘  要:
Plant perceive environment light through photoreceptors to regulate self-growth and development. Cryptochrome 1(CRY1)and Cryptochrome 2(CRY2)are specific blue light photoreceptors in Arabidopsis. CRY2 undergoes blue-light dependent phosphorylation and degradation process, but the mechanism underlie this process is not clear. An early flower mutant was obtained through screening the EMS mutagenesis pools of LUC-CRY2/Col-4 transgene lines. CRY2 protein was over-accumulated in the mutant but the amount of CRY1 protein was not affected. This mutant was named mac1(more abundant of cry2 1). Map-based cloning and CRISPR/Cas9 knock out experiment showed that this is a new allele of mutation in PRP8, we named it prp8-11. Real-time PCR demonstrated that the accumulation of CRY2 protein is not caused by overexpression of mRNA, but regulated at post transcription level. This study provided new insight for further understanding the function of the PRP8 gene in light signal network.

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