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Charpentier T, Viault G, Le Ray AM, Bataillé-Simoneau N, Helesbeux JJ, Blon N, Bastide F, Marchi M, Aligon S, Bruguière A, Dinh CP, Benbelkacem Z, Dallery JF, Simoneau P, Richomme P, Guillemette T. Natural Products Targeting the Fungal Unfolded Protein Response as an Alternative Crop Protection Strategy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:13706-13716. [PMID: 37697453 DOI: 10.1021/acs.jafc.3c03602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Discovering new solutions for crop protection is a major challenge for the next decades as a result of the ecotoxicological impact of classical fungicides, the emergence of fungicide resistances, and the consequence of climate change on pathogen distribution. Previous work on fungal mutants deficient in the unfolded protein response (UPR) supported that targeting this pathway is a promising plant disease control strategy. In particular, we showed that the UPR is involved in fungal virulence by altering cell protection against host defense compounds, such as phytoalexins and phytoanticipins. In this study, we evaluated natural products targeting fungal IRE1 protein (UPR effector) and consequently increasing fungal susceptibility to plant defenses. Developing an in vitro cell-based screening assay allowed for the identification of seven potential IRE1 inhibitors with a focus on polyhydroxylated prenylated xanthones. Inhibition of hac1 mRNA splicing, which is mediated by IRE1, was then validated for the most active compound, namely, γ-mangostin 3. To study the mode of interaction between the binding site of IRE1 and active xanthones, molecular docking was also undertaken, revealing similar and novel interactions between the known inhibitor and the binding site. Eventually, active xanthones applied at subtoxic doses induced a significant reduction in necrosis size for leaves of Brassica oleracea inoculated with Alternaria brassicicola and Botrytis cinerea.
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Affiliation(s)
- Thomas Charpentier
- Université Angers, SONAS, SFR QUASAV, F-49000 Angers, France
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
| | | | | | | | | | - Nadège Blon
- Université Angers, SONAS, SFR QUASAV, F-49000 Angers, France
| | - Franck Bastide
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
| | - Muriel Marchi
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
| | - Sophie Aligon
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
| | | | - Chau Phi Dinh
- Université Angers, SONAS, SFR QUASAV, F-49000 Angers, France
| | | | - Jean-Felix Dallery
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
| | - Philippe Simoneau
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
| | - Pascal Richomme
- Université Angers, SONAS, SFR QUASAV, F-49000 Angers, France
| | - Thomas Guillemette
- Université Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, 49070 Beaucouzé, France
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Peng L, Du J, Zhang R, Zhu N, Zhao H, Zhao Q, Yu Q, Li M. The Transient Receptor Potential Channel Yvc1 Deletion Recovers the Growth Defect of Calcineurin Mutant Under Endoplasmic Reticulum Stress in Candida albicans. Front Microbiol 2021; 12:752670. [PMID: 34917046 PMCID: PMC8669648 DOI: 10.3389/fmicb.2021.752670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/07/2021] [Indexed: 11/24/2022] Open
Abstract
Transient receptor potential (TRP) channel Yvc1 was related with hyphal growth, oxidative stress response, and pathogenicity. Calcineurin subunit Cnb1 was activated immediately in yeasts when exposed to severe stimulation. However, the relationship between Yvc1 and Cnb1-governed calcium ions and endoplasmic reticulum (ER) stress response remains unrevealed. In this study, we found that the mutant cnb1Δ/Δ was sensitive to TN, which was related with the overexpression of membrane calcium ion channels that could increase the cytosol calcium concentration. However, the growth of the cnb1Δ/Δyvc1Δ/Δ mutant was recovered and its cell vitality was better than the cnb1Δ/Δ strain. Meanwhile, the cellular calcium concentration was decreased and its fluctuation was weakened under ER stress in the cnb1Δ/Δyvc1Δ/Δ strain. To verify the regulation role of Yvc1 in the calcium concentration, we found that the addition of CaCl2 led to the worse viability, while the growth state was relieved under the treatment of EGTA in the cnb1Δ/Δ strain. In conclusion, the deletion of YVC1 could reduce the cellular calcium and relieve the ER stress sensitivity of the cnb1Δ/Δ strain. Thereby, our findings shed a novel light on the relationship between the Yvc1-governed cellular calcium concentration and ER stress response in C. albicans.
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Affiliation(s)
- Liping Peng
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Jiawen Du
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Runfan Zhang
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Nali Zhu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - He Zhao
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Qiang Zhao
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Qilin Yu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Mingchun Li
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
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Tan C, Deng JL, Zhang F, Zhu Z, Yan LJ, Zhang MJ, Yuan J, Wang SH. CWI pathway participated in vegetative growth and pathogenicity through a downstream effector AflRlm1 in Aspergillus flavus. iScience 2021; 24:103159. [PMID: 34693219 PMCID: PMC8517163 DOI: 10.1016/j.isci.2021.103159] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 08/01/2021] [Accepted: 09/17/2021] [Indexed: 11/26/2022] Open
Abstract
The cell wall is an essential dynamic structure for shielding fungus from environmental stress, and its synthesizing and remodeling are regulated by the cell wall integrity (CWI) pathway. Here, we explored the roles of a putative downstream effector AflRlm1 of CWI pathway in Aspergillus flavus. The results showed that AflRlm1 played a positive role in conidia production, sclerotium formation, aflatoxin biosynthesis, and pathogenicity. Furthermore, we provided evidence for the physical connection between AflRlm1 and AflSlt2 and determined the role of AflSlt2 in the phosphorylation of AflRlm1. Then, we discovered the importance of WSCs (cell wall integrity and stress response component) to the CWI signal and the process of AflRlm1 transferring to the nucleus after receiving the signal. Overall, this study clarified the transmission process of CWI signals and proves that the CWI pathway plays a key role in the development of A. flavus and the production of aflatoxin combined with transcriptome data analysis. Linked the CWI pathway from membrane receptors to transcription factors in A. flavus Found the phosphorylate activation and subcellular metastasis of AflRlm1 in stress Discovered the important role of AflRlm1 in aflatoxin biosynthesis
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Affiliation(s)
- Can Tan
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ji-Li Deng
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Feng Zhang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhuo Zhu
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Li-Juan Yan
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Meng-Juan Zhang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jun Yuan
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shi-Hua Wang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Wardaszka P, Soczewka P, Sienko M, Zoladek T, Kaminska J. Partial Inhibition of Calcineurin Activity by Rcn2 as a Potential Remedy for Vps13 Deficiency. Int J Mol Sci 2021; 22:ijms22031193. [PMID: 33530471 PMCID: PMC7865597 DOI: 10.3390/ijms22031193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/12/2022] Open
Abstract
Regulation of calcineurin, a Ca2+/calmodulin-regulated phosphatase, is important for the nervous system, and its abnormal activity is associated with various pathologies, including neurodegenerative disorders. In yeast cells lacking the VPS13 gene (vps13Δ), a model of VPS13-linked neurological diseases, we recently demonstrated that calcineurin is activated, and its downregulation reduces the negative effects associated with vps13Δ mutation. Here, we show that overexpression of the RCN2 gene, which encodes a negative regulator of calcineurin, is beneficial for vps13Δ cells. We studied the molecular mechanism underlying this effect through site-directed mutagenesis of RCN2. The interaction of the resulting Rcn2 variants with a MAPK kinase, Slt2, and subunits of calcineurin was tested. We show that Rcn2 binds preferentially to Cmp2, one of two alternative catalytic subunits of calcineurin, and partially inhibits calcineurin. Rcn2 ability to bind to and reduce the activity of calcineurin was important for the suppression. The binding of Rcn2 to Cmp2 requires two motifs in Rcn2: the previously characterized C-terminal motif and a new N-terminal motif that was discovered in this study. Altogether, our findings can help to better understand calcineurin regulation and to develop new therapeutic strategies against neurodegenerative diseases based on modulation of the activity of selected calcineurin isoforms.
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Snf1 AMPK positively regulates ER-phagy via expression control of Atg39 autophagy receptor in yeast ER stress response. PLoS Genet 2020; 16:e1009053. [PMID: 32986716 PMCID: PMC7544123 DOI: 10.1371/journal.pgen.1009053] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 10/08/2020] [Accepted: 08/14/2020] [Indexed: 12/13/2022] Open
Abstract
Autophagy is a fundamental process responsible for degradation and recycling of intracellular contents. In the budding yeast, non-selective macroautophagy and microautophagy of the endoplasmic reticulum (ER) are caused by ER stress, the circumstance where aberrant proteins accumulate in the ER. The more recent study showed that protein aggregation in the ER initiates ER-selective macroautophagy, referred to as ER-phagy; however, the mechanisms by which ER stress induces ER-phagy have not been fully elucidated. Here, we show that the expression levels of ATG39, encoding an autophagy receptor specific for ER-phagy, are significantly increased under ER-stressed conditions. ATG39 upregulation in ER stress response is mediated by activation of its promoter, which is positively regulated by Snf1 AMP-activated protein kinase (AMPK) and negatively by Mig1 and Mig2 transcriptional repressors. In response to ER stress, Snf1 promotes nuclear export of Mig1 and Mig2. Our results suggest that during ER stress response, Snf1 mediates activation of the ATG39 promoter and consequently facilitates ER-phagy by negatively regulating Mig1 and Mig2.
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Jiménez-Gutiérrez E, Alegría-Carrasco E, Sellers-Moya Á, Molina M, Martín H. Not just the wall: the other ways to turn the yeast CWI pathway on. Int Microbiol 2019; 23:107-119. [PMID: 31342212 DOI: 10.1007/s10123-019-00092-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 12/29/2022]
Abstract
The Saccharomyces cerevisiae cell wall integrity (CWI) pathway took this name when its role in the cell response to cell wall aggressions was clearly established. The receptors involved in sensing the damage, the relevant components operating in signaling to the MAPK Slt2, the transcription factors activated by this MAPK, as well as some key regulatory mechanisms have been identified and characterized along almost 30 years. However, other stimuli that do not alter specifically the yeast cell wall, including protein unfolding, low or high pH, or plasma membrane, oxidative and genotoxic stresses, have been also found to trigger the activation of this pathway. In this review, we compile almost forty non-cell wall-specific compounds or conditions, such as tunicamycin, hypo-osmotic shock, diamide, hydroxyurea, arsenate, and rapamycin, which induce these stresses. Relevant aspects of the CWI-mediated signaling in the response to these non-conventional pathway activators are discussed. The data presented here highlight the central and key position of the CWI pathway in the safeguard of yeast cells to a wide variety of external aggressions.
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Affiliation(s)
- Elena Jiménez-Gutiérrez
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad Complutense de Madrid (IRICIS), Pza. Ramón y Cajal s/n, 28040, Madrid, Spain
| | - Estíbaliz Alegría-Carrasco
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad Complutense de Madrid (IRICIS), Pza. Ramón y Cajal s/n, 28040, Madrid, Spain
| | - Ángela Sellers-Moya
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad Complutense de Madrid (IRICIS), Pza. Ramón y Cajal s/n, 28040, Madrid, Spain
| | - María Molina
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad Complutense de Madrid (IRICIS), Pza. Ramón y Cajal s/n, 28040, Madrid, Spain.
| | - Humberto Martín
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad Complutense de Madrid (IRICIS), Pza. Ramón y Cajal s/n, 28040, Madrid, Spain.
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