Abstract
Effector proteins secreted by plant pathogenic fungi are important artilleries against host immunity, but there is no precedent of such effectors being explored as antifungal targets. Here we demonstrate that MoErs1, a species-specific effector protein secreted by the rice blast fungus Magnaporthe oryzae, inhibits the function of rice papain-like cysteine protease OsRD21 involved in rice immunity. Disrupting MoErs1–OsRD21 interaction effectively controls rice blast. In addition, we show that FY21001, a structure–function-based designer compound, specifically binds to and inhibits MoErs1 function. FY21001 significantly and effectively controls rice blast in field tests. Our study revealed a novel concept of targeting pathogen-specific effector proteins to prevent and manage crop diseases.
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Data availability
All data generated or analysed during this study are included in this published article and its supplementary files. Bio-reagents are available for research purposes upon request from the corresponding author under a Material Transfer Agreement. The NCBI non-redundant protein sequences (nr) database is available at https://blast.ncbi.nlm.nih.gov/Blast.cgi. The CDS sequence for the MoRES1 gene is available in the NCBI database (accession no. OK562582).
References
Wang, X., Song, K., Li, L. & Chen, L. Structure-based drug design strategies and challenges. Curr. Top. Med. Chem. 18, 998–1006 (2018).
Dodds, P. N. & Rathjen, J. P. Plant immunity: towards an integrated view of plant–pathogen interactions. Nat. Rev. Genet. 11, 539–548 (2010).
Jones, J. D. & Dangl, J. L. The plant immune system. Nature 444, 323–329 (2006).
Dong, S. M. & Ma, W. B. How to win a tug-of-war: the adaptive evolution of Phytophthora effectors. Curr. Opin. Plant Biol. 62, 102027 (2021).
Zhang, H., Zheng, X. & Zhang, Z. The Magnaporthe grisea species complex and plant pathogenesis. Mol. Plant Pathol. 17, 796–804 (2016).
Dean, R. et al. The top 10 fungal pathogens in molecular plant pathology. Mol. Plant Pathol. 13, 414–430 (2012).
Khush, G. S. What it will take to feed 5.0 billion rice consumers in 2030. Plant Mol. Biol. 59, 1–6 (2005).
D’Avila, L. S., De Filippi, M. C. C. & Cafe-Filho, A. C. Sensitivity of Pyricularia oryzae populations to fungicides over a 26-year time frame in Brazil. Plant Dis. 105, 1771–1780 (2021).
Harata, K., Daimon, H. & Okuno, T. Trade-off relation between fungicide sensitivity and melanin biosynthesis in plant pathogenic fungi. Iscience 23, 101660 (2020).
Skamnioti, P. & Gurr, S. J. Against the grain: safeguarding rice from rice blast disease. Trends Biotechnol. 27, 141–150 (2009).
Bozkurt, T. O. et al. Phytophthora infestans effector AVRblb2 prevents secretion of a plant immune protease at the haustorial interface. Proc. Natl Acad. Sci. USA 108, 20832–20837 (2011).
Kaschani, F. et al. An effector-targeted protease contributes to defense against Phytophthora infestans and is under diversifying selection in natural hosts. Plant Physiol. 154, 1794–1804 (2010).
Paulus, J. K. et al. Extracellular proteolytic cascade in tomato activates immune protease Rcr3. Proc. Natl Acad. Sci. USA 117, 17409–17417 (2020).
Shindo, T., Misas-Villamil, J. C., Horger, A. C., Song, J. & van der Hoorn, R. A. A role in immunity for Arabidopsis cysteine protease RD21, the ortholog of the tomato immune protease C14. PLoS ONE 7, e29317 (2012).
Misas-Villamil, J. C., van der Hoorn, R. A. & Doehlemann, G. Papain-like cysteine proteases as hubs in plant immunity. New Phytol. 212, 902–907 (2016).
Bar-Ziv, A., Levy, Y., Citovsky, V. & Gafni, Y. The tomato yellow leaf curl virus (TYLCV) V2 protein inhibits enzymatic activity of the host papain-like cysteine protease CYP1. Biochem. Biophys. Res. Commun. 460, 525–529 (2015).
Bernoux, M. et al. RD19, an Arabidopsis cysteine protease required for RRS1-R-mediated resistance, is relocalized to the nucleus by the Ralstonia solanacearum PopP2 effector. Plant Cell 20, 2252–2264 (2008).
Ilyas, M. et al. Functional divergence of two secreted immune proteases of tomato. Curr. Biol. 25, 2300–2306 (2015).
Lozano-Torres, J. L. et al. Dual disease resistance mediated by the immune receptor Cf-2 in tomato requires a common virulence target of a fungus and a nematode. Proc. Natl Acad. Sci. USA 109, 10119–10124 (2012).
Mueller, A. N., Ziemann, S., Treitschke, S., Assmann, D. & Doehlemann, G. Compatibility in the Ustilago maydis–maize interaction requires inhibition of host cysteine proteases by the fungal effector Pit2. PLoS Pathog. 9, e1003177 (2013).
Rooney, H. C. E. Cladosporium Avr2 inhibits tomato Rcr3 protease required for Cf-2-dependent disease resistance. Science 308, 1783–1786 (2005); erratum 310, 54 (2005).
Song, J. et al. Apoplastic effectors secreted by two unrelated eukaryotic plant pathogens target the tomato defense protease Rcr3. Proc. Natl Acad. Sci. USA 106, 1654–1659 (2009).
Qi, Z. et al. The syntaxin protein (MoSyn8) mediates intracellular trafficking to regulate conidiogenesis and pathogenicity of rice blast fungus. New Phytol. 209, 1655–1667 (2016).
Wang, Y. et al. Comparative secretome investigation of Magnaporthe oryzae proteins responsive to nitrogen starvation. J. Proteome Res. 10, 3136–3148 (2011).
Talbot, N. J., Ebbole, D. J. & Hamer, J. E. Identification and characterization of Mpg1, a gene involved in pathogenicity from the rice blast fungus Magnaporthe grisea. Plant Cell 5, 1575–1590 (1993).
Talbot, N. J., McCafferty, H. R. K., Ma, M., Moore, K. & Hamer, J. E. Nitrogen starvation of the rice blast fungus Magnaporthe grisea may act as an environmental cue for disease symptom expression. Physiol. Mol. Plant Pathol. 50, 179–195 (1997).
Khang, C. H. et al. Translocation of Magnaporthe oryzae effectors into rice cells and their subsequent cell-to-cell movement. Plant Cell 22, 1388–1403 (2010).
Wu, J. et al. Comparative genomics identifies the Magnaporthe oryzae avirulence effector AvrPi9 that triggers Pi9-mediated blast resistance in rice. New Phytol. 206, 1463–1475 (2015).
Liu, M. X. et al. Phosphorylation-guarded light-harvesting complex II contributes to broad-spectrum blast resistance in rice. Proc. Natl Acad. Sci. USA 116, 17572–17577 (2019).
Mentlak, T. A. et al. Effector-mediated suppression of chitin-triggered immunity by Magnaporthe oryzae is necessary for rice blast disease. Plant Cell 24, 322–335 (2012).
Hunter, M. S. et al. Selenium single-wavelength anomalous diffraction de novo phasing using an X-ray-free electron laser. Nat. Commun. 7, 13388 (2016).
Bendre, A. D., Ramasamy, S. & Suresh, C. G. Analysis of Kunitz inhibitors from plants for comprehensive structural and functional insights. Int. J. Biol. Macromol. 113, 933–943 (2018).
Holm, L. & Rosenstrom, P. Dali server: conservation mapping in 3D. Nucleic Acids Res. 38, W545–W549 (2010).
Boex-Fontvieille, E., Rustgi, S., von Wettstein, D., Reinbothe, S. & Reinbothe, C. Water-soluble chlorophyll protein is involved in herbivore resistance activation during greening of Arabidopsis thaliana. Proc. Natl Acad. Sci. USA 112, 7303–7308 (2015).
Rustgi, S., Boex-Fontvieille, E., Reinbothe, C., von Wettstein, D. & Reinbothe, S. Serpin1 and water-soluble chlorophyll protein differentially regulate the activity of the cysteine protease RD21 during plant development in Arabidopsis thaliana. Proc. Natl Acad. Sci. USA 114, 2212–2217 (2017).
Lampl, N., Alkan, N., Davydov, O. & Fluhr, R. Set-point control of RD21 protease activity by AtSerpin1 controls cell death in Arabidopsis. Plant J. 74, 498–510 (2013).
Gronnier, J. et al. Structural basis for plant plasma membrane protein dynamics and organization into functional nanodomains. Elife 6, e26404 (2017).
Huang, D. Q. et al. Salicylic acid-mediated plasmodesmal closure via Remorin-dependent lipid organization. Proc. Natl Acad. Sci. USA 116, 21274–21284 (2019); erratum 117, 8659 (2020).
Hu, J. et al. Co-evolved plant and blast fungus ascorbate oxidases orchestrate the redox state of host apoplast to modulate rice immunity. Mol. Plant 15, 1347–1366 (2022).
Bethune, M. T., Strop, P., Tang, Y. Y., Sollid, L. M. & Khosla, C. Heterologous expression, purification, refolding, and structural-functional characterization of EP-B2, a self-activating barley cysteine endoprotease. Chem. Biol. 13, 637–647 (2006).
Comeau, S. R., Gatchell, D. W., Vajda, S. & Camacho, C. J. ClusPro: a fully automated algorithm for protein–protein docking. Nucleic Acids Res. 32, W96–W99 (2004).
van der Hoorn, R. A. L., Leeuwenburgh, M. A., Bogyo, M., Joosten, M. H. A. J. & Peck, S. C. Activity profiling of papain-like cysteine proteases in plants. Plant Physiol. 135, 1170–1178 (2004).
Chen, T. et al. Diaryl ether: a privileged scaffold for drug and agrochemical discovery. J. Agric Food Chem. 68, 9839–9877 (2020).
He, M. et al. Discovery of broad-spectrum fungicides that block septin-dependent infection processes of pathogenic fungi. Nat. Microbiol. 5, 1565–1575 (2020).
Zhang, B. et al. PIRIN2 stabilizes cysteine protease XCP2 and increases susceptibility to the vascular pathogen Ralstonia solanacearum in Arabidopsis. Plant J. 79, 1009–1019 (2014).
Lampl, N. et al. Arabidopsis AtSerpin1, crystal structure and in vivo interaction with its target protease RESPONSIVE TO DESICCATION-21 (RD21). J. Biol. Chem. 285, 13550–13560 (2010).
Halls, C. E. et al. A Kunitz-type cysteine protease inhibitor from cauliflower and Arabidopsis. Plant Sci. 170, 1102–1110 (2006).
Boex-Fontvieille, E., Rustgi, S., Reinbothe, S. & Reinbothe, C. A Kunitz-type protease inhibitor regulates programmed cell death during flower development in Arabidopsis thaliana. J. Exp. Bot. 66, 6119–6135 (2015).
Dong, Y. et al. Global genome and transcriptome analyses of Magnaporthe oryzae epidemic isolate 98-06 uncover novel effectors and pathogenicity-related genes, revealing gene gain and lose dynamics in genome evolution. PLoS Pathog. 11, e1004801 (2015).
Huang, J., Si, W. N., Deng, Q. M., Li, P. & Yang, S. H. Rapid evolution of avirulence genes in rice blast fungus Magnaporthe oryzae. BMC Genet. 15, 45 (2014).
Liao, J. J. et al. Pathogen effectors and plant immunity determine specialization of the blast fungus to rice subspecies. Elife 5, e19377 (2016).
Deb, D., Anderson, R. G., How-Yew-Kin, T., Tyler, B. M. & McDowell, J. M. Conserved RxLR effectors from Oomycetes Hyaloperonospora arabidopsidis and Phytophthora sojae suppress PAMP- and effector-triggered immunity in diverse plants. Mol. Plant Microbe 31, 374–385 (2018).
Thatcher, L. F., Gardiner, D. M., Kazan, K. & Manners, J. M. A highly conserved effector in Fusarium oxysporum is required for full virulence on Arabidopsis. Mol. Plant Microbe Interact. 25, 180–190 (2012).
Xiong, Q. et al. Phytophthora suppressor of RNA silencing 2 is a conserved RxLR effector that promotes infection in soybean and Arabidopsis thaliana. Mol. Plant Microbe Interact. 27, 1379–1389 (2014).
Liu, M. et al. Auxilin-like protein MoSwa2 promotes effector secretion and virulence as a clathrin uncoating factor in the rice blast fungus Magnaporthe oryzae. New Phytol. 230, 720–736 (2021).
Park, C. H. et al. The Magnaporthe oryzae effector AvrPiz-t targets the RING E3 ubiquitin ligase APIP6 to suppress pathogen-associated molecular pattern-triggered immunity in rice. Plant Cell 24, 4748–4762 (2012).
Adams, P. D. et al. PHENIX: a comprehensive Python-based system for macromolecular structure solution. Acta Crystallogr. D 66, 213–221 (2010).
Emsley, P., Lohkamp, B., Scott, W. G. & Cowtan, K. Features and development of Coot. Acta Crystallogr. D 66, 486–501 (2010).
Acknowledgements
We thank the BL17U1 staff at Shanghai Synchrotron Radiation Facility for data collection and processing, and C. Liao at Nanjing Agricultural University for model colouring. This research was supported by the National Key Research and Development Programme of China (2022YFD1700300), the key programme of the Natural Science Foundation of China (NSFC) (32030091), NSFC programme 32172377 and NSFC Youth Program 31901832. Research in P.W.’s lab was supported by the US National Institutes of Health under award numbers AI156254 and AI168867.
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M.L. and Z.Z. conceived and designed the study. M.L., F.W. and B.H. performed experiments with phenotypic and biochemical assays. M.L., B.H., J.H., Y.D. and W.C. contributed reagents, plant and fungal materials. M.L., F.W., B.H., M.Y., H.Z. and W.X. collected data. M.L., Y.Y., Z.C., X.Z., P.W., W.X. and Z.Z. analysed the data and wrote the paper.
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Supplementary Table 4
Sequence of MoERS1 gene in various rice blast isolates.
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Liu, M., Wang, F., He, B. et al. Targeting Magnaporthe oryzae effector MoErs1 and host papain-like protease OsRD21 interaction to combat rice blast. Nat. Plants 10, 618–632 (2024). https://doi.org/10.1038/s41477-024-01642-x
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DOI: https://doi.org/10.1038/s41477-024-01642-x
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