The CAP superfamily protein PsCAP1 secreted by Phytophthora triggers immune responses in Nicotiana benthamiana through a leucine-rich repeat receptor-like protein
IF 9.4 1区 生物学Q1 Agricultural and Biological Sciences
Haibin Jiang, Yeqiang Xia, Sicong Zhang, Zhichao Zhang, Hui Feng, Qi Zhang, Xi Chen, Junhua Xiao, Sen Yang, Mengzhu Zeng, Zhaodan Chen, Haibing Ouyang, Xinyi He, Guangzheng Sun, Jinbin Wu, Suomeng Dong, Wenwu Ye, Zhenchuan Ma, Yan Wang, Yuanchao Wang
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引用次数: 0
Abstract
The role of cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1 (CAP) superfamily proteins in the innate immune responses of mammals is well characterized. However, the biological function of CAP superfamily proteins in plant–microbe interactions is poorly understood.
We used proteomics and transcriptome analyses to dissect the apoplastic effectors secreted by the oomycete Phytophthora sojae during early infection of soybean leaves. By transiently expressing these effectors in Nicotiana benthamiana, we identified PsCAP1, a novel type of secreted CAP protein that triggers immune responses in multiple solanaceous plants including N. benthamiana. This secreted CAP protein is conserved among oomycetes, and multiple PsCAP1 homologs can be recognized by N. benthamiana.
PsCAP1-triggered immune responses depend on the N-terminal immunogenic fragment (aa 27–151). Pretreatment of N. benthamiana with PsCAP1 or the immunogenic fragment increases plant resistance against Phytophthora. The recognition of PsCAP1 and different homologs requires the leucine-rich repeat receptor-like protein RCAP1, which associates with two central receptor-like kinases BRI1-associated receptor kinase 1 (BAK1) and suppressor of BIR1-1 (SOBIR1) in planta.
These findings suggest that the CAP-type apoplastic effectors act as an important player in plant–microbe interactions that can be perceived by plant membrane-localized receptor to activate plant resistance.
期刊介绍:
New Phytologist is a leading publication that showcases exceptional and groundbreaking research in plant science and its practical applications. With a focus on five distinct sections - Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology - the journal covers a wide array of topics ranging from cellular processes to the impact of global environmental changes. We encourage the use of interdisciplinary approaches, and our content is structured to reflect this. Our journal acknowledges the diverse techniques employed in plant science, including molecular and cell biology, functional genomics, modeling, and system-based approaches, across various subfields.