MoAti1 mediates mitophagy by facilitating recruitment of MoAtg8 to promote invasive growth in Magnaporthe oryzae

文献类型： 外文期刊

第一作者： Shi, Huanbin

作者： Shi, Huanbin;Meng, Shuai;Qiu, Jiehua;Xie, Shuwei;Jiang, Nan;Kou, Yanjun;Luo, Chaoxi;Luo, Chaoxi;Naqvi, Naweed I.;Kou, Yanjun

作者机构：

关键词： Atg8; fungal pathogen; pathogenicity; rice blast; selective autophagy

期刊名称：MOLECULAR PLANT PATHOLOGY （ 影响因子：4.9； 五年影响因子：5.9 ）

ISSN： 1464-6722

年卷期： 2024 年 25 卷 3 期

页码：

收录情况： SCI

摘要： Mitophagy is a selective autophagy for the degradation of damaged or excessive mitochondria to maintain intracellular homeostasis. In Magnaporthe oryzae, a filamentous ascomycetous fungus that causes rice blast, the most devastating disease of rice, mitophagy occurs in the invasive hyphae to promote infection. To date, only a few proteins are known to participate in mitophagy and the mechanisms of mitophagy are largely unknown in pathogenic fungi. Here, by a yeast two-hybrid screen with the core autophagy-related protein MoAtg8 as a bait, we obtained a MoAtg8 interactor MoAti1 (MoAtg8-interacting protein 1). Fluorescent observations and protease digestion analyses revealed that MoAti1 is primarily localized to the peripheral mitochondrial outer membrane and is responsible for recruiting MoAtg8 to mitochondria under mitophagy induction conditions. MoAti1 is specifically required for mitophagy, but not for macroautophagy and pexophagy. Infection assays suggested that MoAti1 is required for mitophagy in invasive hyphae during pathogenesis. Notably, no homologues of MoAti1 were found in rice and human protein databases, indicating that MoAti1 may be used as a potential target to control rice blast. By the host-induced gene silencing (HIGS) strategy, transgenic rice plants targeted to silencing MoATI1 showed enhanced resistance against M. oryzae with unchanged agronomic traits. Our results suggest that MoATI1 is required for mitophagy and pathogenicity in M. oryzae and can be used as a target for reducing rice blast.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序