Abstract
Calcium signaling plays important roles in stress tolerance and virulence in fungi. Mid1, an accessory protein of Cch1 calcium channel, has been discussed in baker’s yeast and some filamentous fungi. However, functions of the Mid1 gene in entomopathogenic fungi are not clear. In this study, the Mid1 gene was functionally characterized by deleting it in the entomopathogenic fungus Metarhizium acridum. The growth of the ΔMaMid1 mutant was similar as the wild type on normal growth medium, but inhibited by exogenous Ca2+, Fe2+, Mg2+, Mn2+, Li+, and calcium chelator ethylene glycol tetraacetic acid (EGTA). Cation transportation-related genes were upregulated and intracellular calcium concentration was decreased in ΔMaMid1. Deletion of the MaMid1 gene impaired the tolerance to cell wall-disrupting agents but had no impact on heat or ultraviolet irradiation tolerance compared with the wild type. Bioassays showed that ΔMaMid1 had decreased virulence, with defects in the ability to penetrate the host cuticle. Compared with the wild type, appressorium formation on locust wings and fungal growth in the insect hemocoel were significantly decreased in the ΔMaMid1 mutant in a bioassay through topical inoculation. The phenotypes of ΔMaMid1 were fully restored in a complementation strain. Taken together, our study demonstrates that the MaMid1 affects intracellular ion homeostasis and contributes to virulence by affecting the initial penetration process in M. acridum.
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References
Berridge MJ, Bootman MD, Roderick HL (2003) Calcium signaling: dynamics, homeostasis and remodeling. Nat Rev Mol Cell Biol 4:517–529
Bormann J, Tudzynski P (2009) Deletion of Mid1, a putative stretch-activated calcium channel in Claviceps purpurea, affects vegetative growth, cell wall synthesis and virulence. Microbiology 155:3922–3933
Cao Y, Zhu X, Jiao R, Xia Y (2012) The Magas1 gene is involved in pathogenesis by affecting penetration in Metarhizium acridum. J Microbiol Biotechnol 22:889–893
Cao Y, Du M, Luo S, Xia Y (2014) Calcineurin modulates growth, stress tolerance, and virulence in Metarhizium acridum and its regulatory network. Appl Microbiol Biotechnol 98:8253–8265
Cavinder B, Hamam A, Lew RR, Trail F (2011) Mid1, a mechanosensitive calcium ion channel, affects growth, development, and ascospore discharge in the filamentous fungus Gibberella zeae. Eukaryot Cell 10:832–841
Chen X, Liu Y, Keyhani NO, Xia Y, Cao Y (2017) The regulatory role of the transcription factor Crz1 in stress tolerance, pathogenicity, and its target gene expression in Metarhizium acridum. Appl Microbiol Biotechnol 101:5033–5043
Clarkson JM, Charnley AK (1996) New insights into the mechanisms of fungal pathogenesis in insects. Trends Microbiol 4:197–203
Cyert MS (2003) Calcineurin signaling in Saccharomyces cerevisiae: how yeast go crazy in response to stress. Biochem Biophys Res Commun 311:1143–1150
Cyert MS, Philpott CC (2013) Regulation of cation balance in Saccharomyces cerevisiae. Genetics 193(3):677–713
de Castro PA, Chiaratto J, Winkelströter LK, Bom VL, Ramalho LN, Goldman MH, Brown NA, Goldman GH (2014) The involvement of the Mid1/Cch1/Yvc1 calcium channels in Aspergillus fumigatus virulence. PLoS One 9:e103957
dos Reis MC, Pelegrinelli Fungaro MH, Delgado Duarte RT, Furlaneto L, Furlaneto MC (2004) Agrobacterium tumefaciens-mediated genetic transformation of the entomopathogenic fungus Beauveria bassiana. J Microbiol Methods 58:197–202
Driver F, Milner RJ, Trueman JWH (2000) A taxonomic revision of Metarhizium based on a phylogenetic analysis of rDNA sequence data. Mycol Res 104:134–150
Fischer M, Schnell N, Chattaway J, Davies P, Dixon G, Sanders D (1997) The Saccharomyces cerevisiae CCH1 gene is involved in calcium influx and mating. FEBS Lett 419:259–262
Gao Q, Jin K, Ying SH, Zhang Y, Xiao G, Shang Y, Duan Z, Hu X, Xie XQ, Zhou G, Peng G, Luo Z, Huang W, Wang B, Fang W, Wang S, Zhong Y, Ma LJ, St Leger RJ, Zhao GP, Pei Y, Feng MG, Xia Y, Wang C (2011) Genome sequencing and comparative transcriptomics of the model entomopathogenic fungi Metarhizium anisopliae and M. acridum. PLoS Genet 7:e1001264
Ghezzi A, Liebeskind BJ, Thompson A, Atkinson NS, Zakon HH (2014) Ancient association between cation leak channels and Mid1 proteins is conserved in fungi and animals. Front Mol Neurosci 7:15
Gillespie JP, Bateman R, Charnley AK (1998) Role of cuticle-degrading proteases in the virulence of Metarhizium spp. for the desert locust, Schistocerca gregaria. J Invertebr Pathol 1:128–137
Harren K, Tudzynski B (2013) Cch1 and Mid1 are functionally required for vegetative growth under low-calcium conditions in the phytopathogenic ascomycete Botrytis cinerea. Eukaryot Cell 12:712–724
He M, Xia Y (2009) Construction and analysis of a normalized cDNA library from Metarhizium anisopliae var. acridum germinating and differentiating on Locusta migratoria wings. FEMS Microbiol Lett 291:127–135
Hong MP, Vu K, Bautos JM, Gelli A (2010) Cch1 restores intracellular Ca2+ in fungal cells during endoplasmic reticulum stress. J Biol Chem 285:10951–10958
Hong MP, Vu K, Bautos JM, Tham R, Jamklang M, Uhrig JP, Gelli A (2012) Activity of the calcium channel pore Cch1 is dependent on a modulatory region of the subunit Mid1 in Cryptococcus neoformans. Eukaryot Cell 12:142–150
Hunter DM, Milner RJ, Spurgin PA (2001) Aerial treatment of the Australian plague locust, Chortoicetes terminifera (Orthoptera: Acrididae) with Metarhizium anisopliae (Deuteromycotina: Hyphomycetes). Bull Entomol Res 91:93–99
Iida H, Nakamura H, Ono T, Okumura MS, Anraku Y (1994) MID1, a novel Saccharomyces cerevisiae gene encoding a plasma membrane protein, is required for Ca2+ influx and mating. Mol Cell Biol 14:8259–8271
Jiang H, Shen Y, Liu W, Lu L (2014) Deletion of the putative stretch-activated ion channel Mid1 is hypervirulent in Aspergillus fumigatus. Fungal Genet Biol 62:62–70
Kolaj-Robin O, Russell D, Hayes KA, Pembroke JT, Soulimane T (2015) Cation diffusion facilitator family: structure and function. FEBS Lett 589:1283–1295
Lew RR, Abbas Z, Anderca MI, Free SJ (2008) Phenotype of a mechanosensitive channel mutant, mid-1, in a filamentous fungus, Neurospora crassa. Eukaryot Cell 7:647–655
Liu J, Cao Y, Xia Y (2010) Mmc, a gene involved in microcycle conidiation of the entomopathogenic fungus Metarhizium anisopliae. J Invertebr Pathol 105:132–138
Livak KJ, Schmittgen TD (2001) Analysis of relative gene expression data using real-time quantitative PCR and the 2-ΔΔCT method. Methods 25:402–408
Luo S, He M, Cao Y, Xia Y (2013) The tetraspanin gene MaPls1 contributes to virulence by affecting germination, appressorial function and enzymes for cuticle degradation in the entomopathogenic fungus, Metarhizium acridum. Environ Microbiol 15:2966–2979
Nguyen QB, Kadotani N, Kasahara S, Tosa Y, Mayama S, Nakayashiki H (2008) Systematic functional analysis of calcium-signalling proteins in the genome of the rice-blast fungus, Magnaporthe oryzae, using a high-throughput RNA-silencing system. Mol Microbiol 68:1348–1365
Paidhungat M, Garrett S (1997) A homolog of mammalian, voltage gated calcium channels mediates yeast pheromone-stimulated Ca2+ uptake and exacerbates the cdc1 (Ts) growth defect. Mol Cell Biol 17:6339–6347
Palmgren MG, Nissen P (2011) P-type ATPases. Annu Rev Biophys 40:243–266
Peng GX, Wang ZK, Yin YP, Zeng DY, Xia YX (2008) Field trials of Metarhizium anisopliae var. acridum (Ascomycota: Hypocreales) against oriental migratory locusts, Locusta migratoria manilensis (Meyen) in northern China. Crop Prot 27:1244–1250
Pinchai N, Juvvadi PR, Fortwendel JR, Perfect BZ, Rogg LE, Asfaw YG, Steinbach WJ (2010) The Aspergillus fumigatus P-type Golgi apparatus Ca2+/Mn2+ ATPase PmrA is involved in cation homeostasis and cell wall integrity but is not essential for pathogenesis. Eukaryot Cell 9:472–476
Shaw BD, Hoch HC (2000) Ca2+ regulation of Phyllosticta ampelicida pycnidiospore germination and appressorium formation. Fungal Genet Biol 31:43–53
St Leger R, Joshi L, Bidochka MJ, Roberts DW (1996) Construction of an improved mycoinsecticide overexpressing a toxic protease. Proc Natl Acad Sci U S A 93:6349–6354
Vu K, Bautos JM, Gelli A (2015) The Cch1-Mid1 high-affinity calcium channel contributes to the virulence of Cryptococcus neoformans by mitigating oxidative stress. Eukaryot Cell 14:1135–1143
Wang S, Cao J, Liu X, Hu H, Shi J, Zhang S, Keller NP, Lu L (2012) Putative calcium channels CchA and MidA play the important roles in conidiation, hyphal polarity and cell wall components in Aspergillus nidulans. PLoS One 7:e46564
Yu Q, Wang H, Cheng X, Xu N, Ding X, Xing L, Li M (2012) Roles of Cch1 and Mid1 in morphogenesis, oxidative stress response and virulence in Candida albicans. Mycopathologia 174:359–369
Funding
This work was supported by the Natural Science Foundation of China (No. 31772222, No. 31371992), Natural Science Foundation Project of CQ CSTC (cstc2018jcyjAX0204).
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Xie, M., Zhou, X., Xia, Y. et al. Mid1 affects ion transport, cell wall integrity, and host penetration of the entomopathogenic fungus Metarhizium acridum. Appl Microbiol Biotechnol 103, 1801–1810 (2019). https://doi.org/10.1007/s00253-018-09589-8
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DOI: https://doi.org/10.1007/s00253-018-09589-8