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Sumoylation E3 Ligase SIZ1 Modulates Plant Immunity Partly through the Immune Receptor Gene SNC1 in Arabidopsis

文献类型： 外文期刊

作者： Gou, Mingyue 1 ; Huang, Quansheng 1 ; Qian, Weiqiang 1 ; Zhang, Zemin 1 ; Jia, Zhenhua 1 ; Hua, Jian 1 ;

作者机构： 1.Cornell Univ, Sch Integrated Plant Sci, Plant Biol Sect, Ithaca, NY 14853 USA

2.Xinjiang Acad Agr Sci, Inst Nucl & Biol Technol, Xinjiang Key Lab Crop Biotechnol, Urumqi 830091, Peoples R China

3.South China Agr Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop AgroBi, Guangzhou 510642, Guangdong, Peoples R China

4.Hebei Acad Sci, Inst Biol, Shijiazhuang 050081, Hebei, Peoples R China

5.Brookhaven Natl Lab, Biol Dept, Upton, NY 11973 USA

6.Beijing Univ, Sch Life Sci, State Key Lab Prot & Plant Gene Res, Beijing 100871, Peoples R China

期刊名称：MOLECULAR PLANT-MICROBE INTERACTIONS （ 影响因子：4.171； 五年影响因子：4.836 ）

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收录情况： SCI

摘要： The small ubiqutin-like modifier E3 ligase SIZ1 regulates multiple processes in Arabidopsis, including salicylic-acid-dependent immune responses. However, the targets of SIZ1 in plant immunity are not known. Here, we provide evidence that the plant immune receptor nucleotide-binding leucine-rich repeat gene SNC1 partially mediates the regulation of plant immunity by SIZ1. The siz1 loss-of-function mutant has an autoimmune phenotype that is dependent on SNC1 and temperature. Overexpression of SIZ1 partially rescues autoimmune mutant phenotypes induced by activation or overaccumulation of SNC1, and the SNC1 protein amount is attenuated by SIZ1 overexpression. In addition, overexpression of the F-box protein CPR1 that degrades the SNC1 protein inhibits the growth defects and disease resistance of the siz1 mutant. Furthermore, we found that the SNC1 protein is sumoylated in planta. Although it remains to be determined whether SIZ1 primarily modulates the SNC1 protein via sumoylation or affects SNC1 transcript level, our data indicate that SNC1 is a major mediator of defense response modulated by SIZ1 and that SNC1 is a crucial target for fine-tuning plant defense responses.

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