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Antiviral Resistance Protein Tm-2(2) Functions on the Plasma Membrane

文献类型： 外文期刊

作者： Chen, Tianyuan 1 ; Liu, Dan 1 ; Niu, Xiaolin 1 ; Wang, Junzhu 1 ; Qian, Lichao 1 ; Han, Lu 1 ; Liu, Na 1 ; Zhao, Jinping 1 ; Hong, Yiguo 3 ; Liu, Yule 1 ;

作者机构： 1.Tsinghua Univ, Sch Life Sci, Ctr Plant Biol, Tsinghua Peking Joint Ctr Life Sci,MOE Key Lab Bi, Beijing 100084, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Breeding Base Sustainable Control Pe, Key Lab Biotechnol Plant Protect, Hangzhou 310000, Peoples R China

3.Hangzhou Normal Univ, Res Ctr Plant RNA Signaling, Sch Life & Environm Sci, Hangzhou 311121, Peoples R China

期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.005； 五年影响因子：9.115 ）

ISSN： 0032-0889

年卷期： 2017 年 173 卷 4 期

页码：

收录情况： SCI

摘要： The tomato Tobacco mosaic virus resistance-2(2) (Tm-2(2)) gene encodes a coiled-coil-nucleotide binding site-Leu-rich repeat protein lacking a conventional plasma membrane () localization motif. Tm-2(2) confers plant extreme resistance against tobamoviruses including Tobacco mosaic virus () by recognizing the avirulence (Avr) viral movement protein (). However, the subcellular compartment where Tm-2(2) functions is unclear. Here, we demonstrate that Tm-2(2) interacts with to form a protein complex at the . We show that both inactive and active Tm-2(2) proteins are localized to the . When restricted to by fusing Tm-2(2) to the S-acylated association motif, the Tm-2(2) fusion protein can still induce a hypersensitive response cell death, consistent with its activation at the . Through analyses of viral mutants, we find that the plasmodesmata () localization of the Avr protein is not required for Tm-2(2) function. These results suggest that Tm-2(2)-mediated resistance takes place on without requirement of its Avr protein to be located to .

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