MoErv29 promotes apoplastic effector secretion contributing to virulence of the rice blast fungus Magnaporthe oryzae.

MoErv29 promotes apoplastic effector secretion contributing to virulence of the rice blast fungus Magnaporthe oryzae.
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MoErv29促进质外体效应子分泌,导致稻瘟病菌Magnaporthe oryzae的毒力

DOI:
10.1111/nph.17851
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发表时间:
2022-03
期刊:
The New phytologist
影响因子:
--
通讯作者:
Zhang Z
Zhang Z
中科院分区:
其他
文献类型:
--
作者:
Qian B;Su X;Ye Z;Liu X;Liu M;Shen D;Chen H;Zhang H;Wang P;Zhang Z

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在植物病原真菌和宿主植物相互作用期间,大量病原体衍生的蛋白质被分泌,导致未折叠蛋白质反应(UPR)途径的激活。为了有效运输分泌蛋白,包括那些在疾病进展中重要的蛋白,细胞质外壳蛋白复合物 II (COPII) 表现出多功能作用,但其阐明仍然有限。在这里,我们发现 COPII 货物受体 MoErv29 作为 MoHac1 的靶标发挥作用,MoHac1 是先前鉴定的 UPR 途径的转录因子。在 Magnaporthe oryzae 中,MoERV29 的缺失严重影响了易感水稻宿主中真菌的营养生长、分生孢子和生物营养入侵。我们证明MoErv29是通过识别和结合信号肽后的氨基末端三肽基序来递送分泌蛋白所必需的。通过生物信息学分析,我们预测了MoErv29的货物谱,发现MoErv29是许多蛋白质的分泌所必需的,包括细胞外漆酶和质外体效应子。这种分泌是通过传统的内质网-高尔基体分泌途径介导的,对于赋予宿主识别和抗病性很重要。总而言之,我们的结果揭示了 MoErv29 如何作用于效应器分泌,并且我们的研究结果提供了 COPII 囊泡运输和 UPR 途径之间的关键联系。
During plant‐pathogenic fungi and host plants interactions, numerous pathogen‐derived proteins are secreted resulting in the activation of the unfolded protein response (UPR) pathway. For efficient trafficking of secretory proteins, including those important in disease progression, the cytoplasmic coat protein complex II (COPII) exhibits a multifunctional role whose elucidation remains limited. Here, we discovered that the COPII cargo receptor MoErv29 functions as a target of MoHac1, a previously identified transcription factor of the UPR pathway. In Magnaporthe oryzae, deletion of MoERV29 severely affected the vegetative growth, conidiation and biotrophic invasion of the fungus in susceptible rice hosts. We demonstrated that MoErv29 is required for the delivery of secreted proteins through recognition and binding of the amino‐terminal tripeptide motifs following the signal peptide. By using bioinformatics analysis, we predicted a cargo spectrum of MoErv29 and found that MoErv29 is required for the secretion of many proteins, including extracellular laccases and apoplastic effectors. This secretion is mediated through the conventional endoplasmic reticulum–Golgi secretion pathway and is important for conferring host recognition and disease resistance. Taken together, our results revealed how MoErv29 operates on effector secretion, and our findings provided a critical link between COPII vesicle trafficking and the UPR pathway.
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