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Pejenaute-Ochoa MD, Tomás-Gallardo L, Ibeas JI, Barrales RR. Row1, a member of a new family of conserved fungal proteins involved in infection, is required for appressoria functionality in Ustilago maydis. THE NEW PHYTOLOGIST 2024; 243:1101-1122. [PMID: 38742361 DOI: 10.1111/nph.19798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 04/17/2024] [Indexed: 05/16/2024]
Abstract
The appressorium of phytopathogenic fungi is a specific structure with a crucial role in plant cuticle penetration. Pathogens with melanized appressoria break the cuticle through cell wall melanization and intracellular turgor pressure. However, in fungi with nonmelanized appressorium, the mechanisms governing cuticle penetration are poorly understood. Here we characterize Row1, a previously uncharacterized appressoria-specific protein of Ustilago maydis that localizes to membrane and secretory vesicles. Deletion of row1 decreases appressoria formation and plant penetration, thereby reducing virulence. Specifically, the Δrow1 mutant has a thicker cell wall that is more resistant to glucanase degradation. We also observed that the Δrow1 mutant has secretion defects. We show that Row1 is functionally conserved at least among Ustilaginaceae and belongs to the Row family, which consists of five other proteins that are highly conserved among Basidiomycota fungi and are involved in U. maydis virulence. We observed similarities in localization between Row1 and Row2, which is also involved in cell wall remodelling and secretion, suggesting similar molecular functions for members of this protein family. Our data suggest that Row1 could modify the chitin-glucan matrix of the fungal cell wall and may be involved in unconventional protein secretion, thereby promoting both appressoria maturation and penetration.
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Affiliation(s)
- María Dolores Pejenaute-Ochoa
- Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide-CSIC-Junta de Andalucía, Ctra. Utrera km.1, 41013, Seville, Spain
| | - Laura Tomás-Gallardo
- Proteomics and Biochemistry Platform, Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide-CSIC-Junta de Andalucía, Ctra. Utrera km. 1, 41013, Seville, Spain
| | - José I Ibeas
- Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide-CSIC-Junta de Andalucía, Ctra. Utrera km.1, 41013, Seville, Spain
| | - Ramón R Barrales
- Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide-CSIC-Junta de Andalucía, Ctra. Utrera km.1, 41013, Seville, Spain
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2
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Moon H, Min K, Winarto J, Shin S, Jeon H, Song DG, Son H. Proteomic Analysis of Cell Wall Proteins with Various Linkages in Fusarium graminearum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:6028-6039. [PMID: 38457781 DOI: 10.1021/acs.jafc.3c07746] [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: 03/10/2024]
Abstract
The fungal cell wall, primarily comprising a glucan-chitin matrix and cell wall proteins (CWPs), serves as a key mediator for fungal interactions with the environment and plays a pivotal role in virulence. In this study, we employed a comprehensive proteomics approach to analyze the CWPs in the plant pathogenic fungus Fusarium graminearum. Our methodology successfully extracted and identified 1373 CWPs, highlighting their complex linkages, including noncovalent bonds, disulfide bridges, alkali-sensitive linkages, and glycosylphosphatidylinositol (GPI) anchors. A significant subset of these proteins, enriched in Gene Ontology terms, suggest multifunctional roles of CWPs. Through the integration of transcriptomic and proteomic data, we observed differential expression patterns of CWPs across developmental stages. Specifically, we focused on two genes, Fca7 and Cpd1, which were upregulated in planta, and confirmed their localization predominantly outside the plasma membrane, primarily in the cell wall and periplasmic space. The disruption of FCA7 reduced virulence on wheat, aligning with previous findings and underscoring its significance. Overall, our findings offer a comprehensive proteomic profile of CWPs in F. graminearum, laying the groundwork for a deeper understanding of their roles in the development and interactions with host plants.
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Affiliation(s)
- Heeji Moon
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyunghun Min
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
- Department of Plant Science, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea
| | - Jessica Winarto
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute of Natural Products, Gangneung 25451, Republic of Korea
- Division of Bio-Medical Science & Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Soobin Shin
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Hosung Jeon
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Dae-Geun Song
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute of Natural Products, Gangneung 25451, Republic of Korea
- Division of Bio-Medical Science & Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Hokyoung Son
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
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3
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Schiavone M, François JM, Zerbib D, Capp JP. Emerging relevance of cell wall components from non-conventional yeasts as functional ingredients for the food and feed industry. Curr Res Food Sci 2023; 7:100603. [PMID: 37840697 PMCID: PMC10568300 DOI: 10.1016/j.crfs.2023.100603] [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: 05/30/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 10/17/2023] Open
Abstract
Non-conventional yeast species, or non-Saccharomyces yeasts, are increasingly recognized for their involvement in fermented foods. Many of them exhibit probiotic characteristics that are mainly due to direct contacts with other cell types through various molecular components of their cell wall. The biochemical composition and/or the molecular structure of the cell wall components are currently considered the primary determinant of their probiotic properties. Here we first present the techniques that are used to extract and analyze the cell wall components of food industry-related non-Saccharomyces yeasts. We then review the current understanding of the cell wall composition and structure of each polysaccharide from these yeasts. Finally, the data exploring the potential beneficial role of their cell wall components, which could be a source of innovative functional ingredients, are discussed. Such research would allow the development of high value-added products and provide the food industry with novel inputs beyond the well-established S. cerevisiae.
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Affiliation(s)
- Marion Schiavone
- Toulouse Biotechnology Institute (TBI), Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
- Lallemand SAS, Blagnac, France
| | - Jean M. François
- Toulouse Biotechnology Institute (TBI), Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
- Toulouse White Biotechnology (TWB), UMS INRAE/INSA/CNRS, Toulouse, France
| | - Didier Zerbib
- Toulouse Biotechnology Institute (TBI), Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Jean-Pascal Capp
- Toulouse Biotechnology Institute (TBI), Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
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4
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Canto-Canché B, Burgos-Canul YY, Chi-Chuc D, Tzec-Simá M, Ku-González A, Brito-Argáez L, Carrillo-Pech M, De Los Santos-Briones C, Canseco-Pérez MÁ, Luna-Moreno D, Beltrán-García MJ, Islas-Flores I. Moonlight-like proteins are actually cell wall components in Pseudocercospora fijiensis. World J Microbiol Biotechnol 2023; 39:232. [PMID: 37349471 DOI: 10.1007/s11274-023-03676-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 06/12/2023] [Indexed: 06/24/2023]
Abstract
The fungal cell wall protects fungi against threats, both biotic and abiotic, and plays a role in pathogenicity by facilitating host adhesion, among other functions. Although carbohydrates (e.g. glucans, chitin) are the most abundant components, the fungal cell wall also harbors ionic proteins, proteins bound by disulfide bridges, alkali-extractable, SDS-extractable, and GPI-anchored proteins, among others; the latter consisting of suitable targets which can be used for fungal pathogen control. Pseudocercospora fijiensis is the causal agent of black Sigatoka disease, the principal threat to banana and plantain worldwide. Here, we report the isolation of the cell wall of this pathogen, followed by extensive washing to eliminate all loosely associated proteins and conserve those integrated to its cell wall. In the HF-pyridine protein fraction, one of the most abundant protein bands was recovered from SDS-PAGE gels, electro-eluted and sequenced. Seven proteins were identified from this band, none of which were GPI-anchored proteins. Instead, atypical (moonlight-like) cell wall proteins were identified, suggesting a new class of atypical proteins, bound to the cell wall by unknown linkages. Western blot and histological analyses of the cell wall fractions support that these proteins are true cell wall proteins, most likely involved in fungal pathogenesis/virulence, since they were found conserved in many fungal pathogens.
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Affiliation(s)
- Blondy Canto-Canché
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - Yamily Yazmin Burgos-Canul
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - Deysi Chi-Chuc
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
- Escuela Telebachillerato Comunitario de Xcunya, Calle 20, Mérida, México
| | - Miguel Tzec-Simá
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - Angela Ku-González
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - Ligia Brito-Argáez
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - Mildred Carrillo-Pech
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - César De Los Santos-Briones
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México
| | - Miguel Ángel Canseco-Pérez
- Dirección de Investigación, Evaluación y Posgrado, Universidad Tecnológica de Tlaxcala, Carretera a el Carmen Xalplatlahuaya s/n. El Carmen Xalplatlahuaya, Tlaxcala, Huamantla, C.P. 90500, Mexico
| | - Donato Luna-Moreno
- Centro de Investigaciones en Óptica AC, División de Fotónica, Loma del Bosque 115, Col. Lomas del Campestre, León, Gto, C.P. 37150, México
| | | | - Ignacio Islas-Flores
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Colonia Chuburná de Hidalgo, Calle 43 No. 130 x 32 y 34, Mérida, A.C., Yucatán, C.P. 97205, México.
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5
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Alvarado M, Gómez-Navajas JA, Blázquez-Muñoz MT, Gómez-Molero E, Berbegal C, Eraso E, Kramer G, De Groot PWJ. Integrated post-genomic cell wall analysis reveals floating biofilm formation associated with high expression of flocculins in the pathogen Pichia kudriavzevii. PLoS Pathog 2023; 19:e1011158. [PMID: 37196016 DOI: 10.1371/journal.ppat.1011158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 05/30/2023] [Accepted: 04/27/2023] [Indexed: 05/19/2023] Open
Abstract
The pathogenic yeast Pichia kudriavzevii, previously known as Candida krusei, is more distantly related to Candida albicans than clinically relevant CTG-clade Candida species. Its cell wall, a dynamic organelle that is the first point of interaction between pathogen and host, is relatively understudied, and its wall proteome remains unidentified to date. Here, we present an integrated study of the cell wall in P. kudriavzevii. Our comparative genomic studies and experimental data indicate that the general structure of the cell wall in P. kudriavzevii is similar to Saccharomyces cerevisiae and C. albicans and is comprised of β-1,3-glucan, β-1,6-glucan, chitin, and mannoproteins. However, some pronounced differences with C. albicans walls were observed, for instance, higher mannan and protein levels and altered protein mannosylation patterns. Further, despite absence of proteins with high sequence similarity to Candida adhesins, protein structure modeling identified eleven proteins related to flocculins/adhesins in S. cerevisiae or C. albicans. To obtain a proteomic comparison of biofilm and planktonic cells, P. kudriavzevii cells were grown to exponential phase and in static 24-h cultures. Interestingly, the 24-h static cultures of P. kudriavzevii yielded formation of floating biofilm (flor) rather than adherence to polystyrene at the bottom. The proteomic analysis of both conditions identified a total of 33 cell wall proteins. In line with a possible role in flor formation, increased abundance of flocculins, in particular Flo110, was observed in the floating biofilm compared to exponential cells. This study is the first to provide a detailed description of the cell wall in P. kudriavzevii including its cell wall proteome, and paves the way for further investigations on the importance of flor formation and flocculins in the pathogenesis of P. kudriavzevii.
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Affiliation(s)
- María Alvarado
- Regional Center for Biomedical Research, Castilla-La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - Jesús Alberto Gómez-Navajas
- Regional Center for Biomedical Research, Castilla-La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - María Teresa Blázquez-Muñoz
- Regional Center for Biomedical Research, Castilla-La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - Emilia Gómez-Molero
- Regional Center for Biomedical Research, Castilla-La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - Carmen Berbegal
- ENOLAB, Estructura de Recerca Interdisciplinar (ERI) BioTecMed and Departament de Microbiologia i Ecología, Universitat de València, Burjassot, Spain
| | - Elena Eraso
- Department of Immunology, Microbiology and Parasitology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Gertjan Kramer
- Mass Spectrometry of Biomolecules, University of Amsterdam, Swammerdam Institute for Life Sciences Amsterdam, Amsterdam, The Netherlands
| | - Piet W J De Groot
- Regional Center for Biomedical Research, Castilla-La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
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6
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Ma QZ, Wu HY, Xie SP, Zhao BS, Yin XM, Ding SL, Guo YS, Xu C, Zang R, Geng YH, Zhang M. BsTup1 is required for growth, conidiogenesis, stress response and pathogenicity of Bipolaris sorokiniana. Int J Biol Macromol 2022; 220:721-732. [PMID: 35981683 DOI: 10.1016/j.ijbiomac.2022.07.250] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 11/05/2022]
Abstract
Tup1, a conserved transcriptional repressor, plays a critical role in the growth and development of fungi. Here, we identified a BsTup1 gene from the plant pathogenic fungus Bipolaris sorokiniana. The expression of BsTup1 showed a more than three-fold increase during the conidial stage compared with mycelium stage. Deletion of BsTup1 led to decrease hyphal growth and defect in conidia formation. A significant difference was detected in osmotic, oxidative, or cell wall stress responses between the WT and ΔBsTup1 strains. Pathogenicity assays showed that virulence of the ΔBsTup1 mutant was dramatically decreased on wheat and barely leaves. Moreover, it was observed that hyphal tips of the mutants could not form appressorium-like structures on the inner epidermis of onion and barley coleoptile. Yeast two-hybrid assays indicated that BsTup1 could interact with the BsSsn6. RNAseq revealed significant transcriptional changes in the ΔBsTup1 mutant with 2369 genes down-regulated and 2962 genes up-regulated. In these genes, we found that a subset of genes involved in fungal growth, sporulation, cell wall integrity, osmotic stress, oxidation stress, and pathogenicity, which were misregulated in the ΔBsTup1 mutant. These data revealed that BsTup1 has multiple functions in fungal growth, development, stress response and pathogenesis in B. sorokiniana.
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Affiliation(s)
- Qing-Zhou Ma
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Hai-Yan Wu
- Analytical Instrument Center, Henan Agricultural University, Zhengzhou 450002, China
| | - Shun-Pei Xie
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Bing-Sen Zhao
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Xin-Ming Yin
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Sheng-Li Ding
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Ya-Shuang Guo
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Chao Xu
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Rui Zang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Yue-Hua Geng
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China.
| | - Meng Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China.
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7
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Qiu Y, Bi J, Jin X, Wu X, Hu L, Chen L. Investigation on the rehydration mechanism of freeze-dried and hot-air dried shiitake mushrooms from pores and cell wall fibrous material. Food Chem 2022; 383:132360. [PMID: 35180597 DOI: 10.1016/j.foodchem.2022.132360] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 01/29/2022] [Accepted: 02/03/2022] [Indexed: 11/17/2022]
Abstract
Shiitake mushrooms are unique in their porous structure, which could be affected by various chemical/physical changes during freeze-drying process. In this work, rehydration characteristics of freeze-dried products which were pre-frozen at -20 ℃, -40 ℃, -80 ℃, and -196 ℃ (by liquid nitrogen) were explored from aspects of pores and cell wall fibrous material. Although the appearance and rehydration rate of freeze-dried samples was better than hot-air dried samples with drying temperature ranging from 30 ℃ to 90 ℃, the final rehydration ratio was still less than hot-air dried samples dried at low temperature (30 ℃ and 40 ℃) due to the more serious structural damage by freeze-drying. Hydration capacity of the cell wall fiber was increased by freeze-drying, which might be ascribed to the loosen structure of cell wall instead of composition changes. Thus, hot-air drying at low temperature is still recommend and freeze-drying should be further optimized.
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Affiliation(s)
- Yang Qiu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Jinfeng Bi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China.
| | - Xin Jin
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China.
| | - Xinye Wu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Lina Hu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Lamei Chen
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
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8
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Ribeiro RA, Bourbon-Melo N, Sá-Correia I. The cell wall and the response and tolerance to stresses of biotechnological relevance in yeasts. Front Microbiol 2022; 13:953479. [PMID: 35966694 PMCID: PMC9366716 DOI: 10.3389/fmicb.2022.953479] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 07/11/2022] [Indexed: 01/18/2023] Open
Abstract
In industrial settings and processes, yeasts may face multiple adverse environmental conditions. These include exposure to non-optimal temperatures or pH, osmotic stress, and deleterious concentrations of diverse inhibitory compounds. These toxic chemicals may result from the desired accumulation of added-value bio-products, yeast metabolism, or be present or derive from the pre-treatment of feedstocks, as in lignocellulosic biomass hydrolysates. Adaptation and tolerance to industrially relevant stress factors involve highly complex and coordinated molecular mechanisms occurring in the yeast cell with repercussions on the performance and economy of bioprocesses, or on the microbiological stability and conservation of foods, beverages, and other goods. To sense, survive, and adapt to different stresses, yeasts rely on a network of signaling pathways to modulate the global transcriptional response and elicit coordinated changes in the cell. These pathways cooperate and tightly regulate the composition, organization and biophysical properties of the cell wall. The intricacy of the underlying regulatory networks reflects the major role of the cell wall as the first line of defense against a wide range of environmental stresses. However, the involvement of cell wall in the adaptation and tolerance of yeasts to multiple stresses of biotechnological relevance has not received the deserved attention. This article provides an overview of the molecular mechanisms involved in fine-tuning cell wall physicochemical properties during the stress response of Saccharomyces cerevisiae and their implication in stress tolerance. The available information for non-conventional yeast species is also included. These non-Saccharomyces species have recently been on the focus of very active research to better explore or control their biotechnological potential envisaging the transition to a sustainable circular bioeconomy.
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Affiliation(s)
- Ricardo A. Ribeiro
- Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Nuno Bourbon-Melo
- Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Isabel Sá-Correia
- Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
- Associate Laboratory i4HB—Institute for Health and Bioeconomy at Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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9
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Kota AK, Mikkineni A, Mathi P, Patnala K, Velagapudi K, Panditi SK, Jeevigunta NLL. Competetive metal binding stoichiometry between calcium and strontium by cell wall proteins of
Neurospora crassa. J Basic Microbiol 2022; 62:568-583. [DOI: 10.1002/jobm.202100456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 02/14/2022] [Accepted: 02/26/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Ashok Kumar Kota
- Department of Biosciences and Biotechnology Krishna University Machilipatnam India
| | - Anupama Mikkineni
- Department of Biosciences and Biotechnology Krishna University Machilipatnam India
| | | | | | - Kavitha Velagapudi
- Department of Biosciences and Biotechnology Krishna University Machilipatnam India
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10
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Fernández-Pereira J, Alvarado M, Gómez-Molero E, Dekker HL, Blázquez-Muñoz MT, Eraso E, Bader O, de Groot PWJ. Characterization of Awp14, A Novel Cluster III Adhesin Identified in a High Biofilm-Forming Candida glabrata Isolate. Front Cell Infect Microbiol 2021; 11:790465. [PMID: 34869084 PMCID: PMC8634165 DOI: 10.3389/fcimb.2021.790465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 10/25/2021] [Indexed: 12/30/2022] Open
Abstract
Candida glabrata is among the most prevalent causes of candidiasis. Unlike Candida albicans, it is not capable of changing morphology between yeast and hyphal forms but instead has developed other virulence factors. An important feature is its unprecedented large repertoire of predicted cell wall adhesins, which are thought to enable adherence to a variety of surfaces under different conditions. Here, we analyzed the wall proteome of PEU1221, a high biofilm-forming clinical strain isolated from an infected central venous catheter, under biofilm-forming conditions. This isolate shows increased incorporation of putative adhesins, including eight proteins that were not detected in walls of reference strain ATCC 2001, and of which Epa22, Awp14, and Awp2e were identified for the first time. The proteomics data suggest that cluster III adhesin Awp14 is relatively abundant in PEU1221. Phenotypic studies with awp14Δ deletion mutants showed that Awp14 is not responsible for the high biofilm formation of PEU1221 onto polystyrene. However, awp14Δ mutant cells in PEU1221 background showed a slightly diminished binding to chitin and seemed to sediment slightly slower than the parental strain suggesting implication in fungal cell-cell interactions. By structural modeling, we further demonstrate similarity between the ligand-binding domains of cluster III adhesin Awp14 and those of cluster V and VI adhesins. In conclusion, our work confirms the increased incorporation of putative adhesins, such as Awp14, in high biofilm-forming isolates, and contributes to decipher the precise role of these proteins in the establishment of C. glabrata infections.
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Affiliation(s)
- Jordan Fernández-Pereira
- Albacete Regional Center for Biomedical Research, Castilla - La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - María Alvarado
- Albacete Regional Center for Biomedical Research, Castilla - La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - Emilia Gómez-Molero
- Albacete Regional Center for Biomedical Research, Castilla - La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Henk L. Dekker
- Mass Spectrometry of Biomolecules, Swammerdam Institute for Life Sciences Amsterdam, University of Amsterdam, Amsterdam, Netherlands
| | - María Teresa Blázquez-Muñoz
- Albacete Regional Center for Biomedical Research, Castilla - La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
| | - Elena Eraso
- Mass Spectrometry of Biomolecules, Swammerdam Institute for Life Sciences Amsterdam, University of Amsterdam, Amsterdam, Netherlands
| | - Oliver Bader
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Piet W. J. de Groot
- Albacete Regional Center for Biomedical Research, Castilla - La Mancha Science & Technology Park, University of Castilla-La Mancha, Albacete, Spain
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11
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Gao Y, Xiong X, Wang H, Wang J, Bi Y, Yan Y, Cao Z, Li D, Song F. Ero1-Pdi1 module-catalysed dimerization of a nucleotide sugar transporter, FonNst2, regulates virulence of Fusarium oxysporum on watermelon. Environ Microbiol 2021; 24:1200-1220. [PMID: 34587346 DOI: 10.1111/1462-2920.15789] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/23/2021] [Indexed: 11/29/2022]
Abstract
Fusarium oxysporum f. sp. niveum (Fon) is a soil-borne fungus causing vascular Fusarium wilt on watermelon; however, the molecular network regulating Fon virulence remains to be elucidated. Here, we report the function and mechanism of nucleotide sugar transporters (Nsts) in Fon. Fon genome harbours nine FonNst genes with distinct functions in vegetative growth, asexual production, cell wall stress response and virulence. FonNst2 and FonNst3 are required for full virulence of Fon on watermelon and FonNst2 is mainly involved in fungal colonization of the plant tissues. FonNst2 and FonNst3 form homo- or hetero-dimers but function independently in Fon virulence. FonNst2, which has UDP-galactose transporter activity in yeast, interacts with FonEro1 and FonPdi1, both of which are required for full virulence of Fon. FonNst2, FonPdi1 and FonEro1 target to endoplasmic reticulum (ER) and are essential for ER homeostasis and function. FonEro1-FonPdi1 module catalyses the dimerization of FonNst2, which is critical for Fon virulence. Undimerized FonNst2 is unstable and degraded via ER-associated protein degradation in vivo. These data demonstrate that FonEro1-FonPdi1 module-catalysed dimerization of FonNst2 is critical for Fon virulence on watermelon and provide new insights into the regulation of virulence in plant fungal pathogens via disulfide bond formation of key pathogenicity factors.
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Affiliation(s)
- Yizhou Gao
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Xiaohui Xiong
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Hui Wang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jiajing Wang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yan Bi
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yuqing Yan
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Zhongye Cao
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Dayong Li
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Fengming Song
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
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12
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Ibe C, Munro CA. Fungal Cell Wall Proteins and Signaling Pathways Form a Cytoprotective Network to Combat Stresses. J Fungi (Basel) 2021; 7:jof7090739. [PMID: 34575777 PMCID: PMC8466366 DOI: 10.3390/jof7090739] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/01/2021] [Accepted: 09/04/2021] [Indexed: 12/13/2022] Open
Abstract
Candida species are part of the normal flora of humans, but once the immune system of the host is impaired and they escape from commensal niches, they shift from commensal to pathogen causing candidiasis. Candida albicans remains the primary cause of candidiasis, accounting for about 60% of the global candidiasis burden. The cell wall of C. albicans and related fungal pathogens forms the interface with the host, gives fungal cells their shape, and also provides protection against stresses. The cell wall is a dynamic organelle with great adaptive flexibility that allows remodeling, morphogenesis, and changes in its components in response to the environment. It is mainly composed of the inner polysaccharide rich layer (chitin, and β-glucan) and the outer protein coat (mannoproteins). The highly glycosylated protein coat mediates interactions between C. albicans cells and their environment, including reprograming of wall architecture in response to several conditions, such as carbon source, pH, high temperature, and morphogenesis. The mannoproteins are also associated with C. albicans adherence, drug resistance, and virulence. Vitally, the mannoproteins contribute to cell wall construction and especially cell wall remodeling when cells encounter physical and chemical stresses. This review describes the interconnected cell wall integrity (CWI) and stress-activated pathways (e.g., Hog1, Cek1, and Mkc1 mediated pathways) that regulates cell wall remodeling and the expression of some of the mannoproteins in C. albicans and other species. The mannoproteins of the surface coat is of great importance to pathogen survival, growth, and virulence, thus understanding their structure and function as well as regulatory mechanisms can pave the way for better management of candidiasis.
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Affiliation(s)
- Chibuike Ibe
- Department of Microbiology, Faculty of Biological Sciences, Abia State University, Uturu 441107, Nigeria
- Correspondence:
| | - Carol A. Munro
- Aberdeen Fungal Group, Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB24 3FX, UK;
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13
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Unveiling the structure of GPI-anchored protein of Malassezia globosa and its pathogenic role in pityriasis versicolor. J Mol Model 2021; 27:246. [PMID: 34379190 DOI: 10.1007/s00894-021-04853-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 07/07/2021] [Indexed: 10/20/2022]
Abstract
Glycosylphosphatidylinositols (GPI)-anchored proteins (GpiPs) are related to the cell wall biogenesis, adhesion, interactions, protease activity, mating, etc. These proteins have been identified in many organisms, including fungi such as Neurospora crassa, Candida albicans, Saccharomyces cerevisiae, and Fusarium graminearum. MGL-3153 gene of Malassezia globosa (M. globosa) encodes a protein which is homologous of the M. restricta, M. sympodialis, M. Pachydermatis, and U. maydis GpiPs. Real-time PCR assay showed that the expression of MGL_3153 gene was significantly up-regulated among M. globosa isolated from patients with pityriasis versicolor (PV) compared to a healthy individual, suggesting the contribution of this gene in the virulence of M. globosa. Accordingly, the sequence of this protein was analyzed by bioinformatics tools to evaluate the structure of that. The conservation analysis of MGL-3153 protein showed that the C-terminal region of this protein, which is responsible for GPI-anchor ligation, was highly conserved during evolution while the N-terminal region just conserved in Malassezia species. Moreover, the predicted tertiary structure of this protein by homology modeling showed that this protein almost has alpha helix structure and represented a stable structure during 150 ns of molecular dynamic simulation. Our results revealed that this protein potentially belongs to GPI-anchored proteins and may contribute to the virulence of M. globosa which warrants further investigations in this area.
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14
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d'Enfert C, Kaune AK, Alaban LR, Chakraborty S, Cole N, Delavy M, Kosmala D, Marsaux B, Fróis-Martins R, Morelli M, Rosati D, Valentine M, Xie Z, Emritloll Y, Warn PA, Bequet F, Bougnoux ME, Bornes S, Gresnigt MS, Hube B, Jacobsen ID, Legrand M, Leibundgut-Landmann S, Manichanh C, Munro CA, Netea MG, Queiroz K, Roget K, Thomas V, Thoral C, Van den Abbeele P, Walker AW, Brown AJP. The impact of the Fungus-Host-Microbiota interplay upon Candida albicans infections: current knowledge and new perspectives. FEMS Microbiol Rev 2021; 45:fuaa060. [PMID: 33232448 PMCID: PMC8100220 DOI: 10.1093/femsre/fuaa060] [Citation(s) in RCA: 126] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 11/18/2020] [Indexed: 12/11/2022] Open
Abstract
Candida albicans is a major fungal pathogen of humans. It exists as a commensal in the oral cavity, gut or genital tract of most individuals, constrained by the local microbiota, epithelial barriers and immune defences. Their perturbation can lead to fungal outgrowth and the development of mucosal infections such as oropharyngeal or vulvovaginal candidiasis, and patients with compromised immunity are susceptible to life-threatening systemic infections. The importance of the interplay between fungus, host and microbiota in driving the transition from C. albicans commensalism to pathogenicity is widely appreciated. However, the complexity of these interactions, and the significant impact of fungal, host and microbiota variability upon disease severity and outcome, are less well understood. Therefore, we summarise the features of the fungus that promote infection, and how genetic variation between clinical isolates influences pathogenicity. We discuss antifungal immunity, how this differs between mucosae, and how individual variation influences a person's susceptibility to infection. Also, we describe factors that influence the composition of gut, oral and vaginal microbiotas, and how these affect fungal colonisation and antifungal immunity. We argue that a detailed understanding of these variables, which underlie fungal-host-microbiota interactions, will present opportunities for directed antifungal therapies that benefit vulnerable patients.
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Affiliation(s)
- Christophe d'Enfert
- Unité Biologie et Pathogénicité Fongiques, Département de Mycologie, Institut Pasteur, USC 2019 INRA, 25, rue du Docteur Roux, 75015 Paris, France
| | - Ann-Kristin Kaune
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Ashgrove Road West, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Leovigildo-Rey Alaban
- BIOASTER Microbiology Technology Institute, 40 avenue Tony Garnier, 69007 Lyon, France
- Université de Paris, Sorbonne Paris Cité, 25, rue du Docteur Roux, 75015 Paris, France
| | - Sayoni Chakraborty
- Microbial Immunology Research Group, Emmy Noether Junior Research Group Adaptive Pathogenicity Strategies, and the Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a, 07745 Jena, Germany
- Institute of Microbiology, Friedrich Schiller University, Neugasse 25, 07743 Jena, Germany
| | - Nathaniel Cole
- Gut Microbiology Group, Rowett Institute, University of Aberdeen, Ashgrove Road West, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Margot Delavy
- Unité Biologie et Pathogénicité Fongiques, Département de Mycologie, Institut Pasteur, USC 2019 INRA, 25, rue du Docteur Roux, 75015 Paris, France
- Université de Paris, Sorbonne Paris Cité, 25, rue du Docteur Roux, 75015 Paris, France
| | - Daria Kosmala
- Unité Biologie et Pathogénicité Fongiques, Département de Mycologie, Institut Pasteur, USC 2019 INRA, 25, rue du Docteur Roux, 75015 Paris, France
- Université de Paris, Sorbonne Paris Cité, 25, rue du Docteur Roux, 75015 Paris, France
| | - Benoît Marsaux
- ProDigest BV, Technologiepark 94, B-9052 Gent, Belgium
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links, 9000 Ghent, Belgium
| | - Ricardo Fróis-Martins
- Immunology Section, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 266a, Zurich 8057, Switzerland
- Institute of Experimental Immunology, University of Zurich, Winterthurerstrasse 190, Zürich 8057, Switzerland
| | - Moran Morelli
- Mimetas, Biopartner Building 2, J.H. Oortweg 19, 2333 CH Leiden, The Netherlands
| | - Diletta Rosati
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Geert Grooteplein 28, 6525 GA Nijmegen, The Netherlands
| | - Marisa Valentine
- Microbial Immunology Research Group, Emmy Noether Junior Research Group Adaptive Pathogenicity Strategies, and the Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a, 07745 Jena, Germany
| | - Zixuan Xie
- Gut Microbiome Group, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Passeig Vall d'Hebron 119–129, 08035 Barcelona, Spain
| | - Yoan Emritloll
- Unité Biologie et Pathogénicité Fongiques, Département de Mycologie, Institut Pasteur, USC 2019 INRA, 25, rue du Docteur Roux, 75015 Paris, France
| | - Peter A Warn
- Magic Bullet Consulting, Biddlecombe House, Ugbrook, Chudleigh Devon, TQ130AD, UK
| | - Frédéric Bequet
- BIOASTER Microbiology Technology Institute, 40 avenue Tony Garnier, 69007 Lyon, France
| | - Marie-Elisabeth Bougnoux
- Unité Biologie et Pathogénicité Fongiques, Département de Mycologie, Institut Pasteur, USC 2019 INRA, 25, rue du Docteur Roux, 75015 Paris, France
| | - Stephanie Bornes
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMRF0545, 20 Côte de Reyne, 15000 Aurillac, France
| | - Mark S Gresnigt
- Microbial Immunology Research Group, Emmy Noether Junior Research Group Adaptive Pathogenicity Strategies, and the Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a, 07745 Jena, Germany
| | - Bernhard Hube
- Microbial Immunology Research Group, Emmy Noether Junior Research Group Adaptive Pathogenicity Strategies, and the Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a, 07745 Jena, Germany
| | - Ilse D Jacobsen
- Microbial Immunology Research Group, Emmy Noether Junior Research Group Adaptive Pathogenicity Strategies, and the Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a, 07745 Jena, Germany
| | - Mélanie Legrand
- Unité Biologie et Pathogénicité Fongiques, Département de Mycologie, Institut Pasteur, USC 2019 INRA, 25, rue du Docteur Roux, 75015 Paris, France
| | - Salomé Leibundgut-Landmann
- Immunology Section, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 266a, Zurich 8057, Switzerland
- Institute of Experimental Immunology, University of Zurich, Winterthurerstrasse 190, Zürich 8057, Switzerland
| | - Chaysavanh Manichanh
- Gut Microbiome Group, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Passeig Vall d'Hebron 119–129, 08035 Barcelona, Spain
| | - Carol A Munro
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Ashgrove Road West, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Geert Grooteplein 28, 6525 GA Nijmegen, The Netherlands
| | - Karla Queiroz
- Mimetas, Biopartner Building 2, J.H. Oortweg 19, 2333 CH Leiden, The Netherlands
| | - Karine Roget
- NEXBIOME Therapeutics, 22 allée Alan Turing, 63000 Clermont-Ferrand, France
| | - Vincent Thomas
- BIOASTER Microbiology Technology Institute, 40 avenue Tony Garnier, 69007 Lyon, France
| | - Claudia Thoral
- NEXBIOME Therapeutics, 22 allée Alan Turing, 63000 Clermont-Ferrand, France
| | | | - Alan W Walker
- Gut Microbiology Group, Rowett Institute, University of Aberdeen, Ashgrove Road West, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Alistair J P Brown
- MRC Centre for Medical Mycology, Department of Biosciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK
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15
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Queiroz MG, Elsztein C, Strahl S, de Morais Junior MA. The Saccharomyces cerevisiae Ncw2 protein works on the chitin/β-glucan organisation of the cell wall. Antonie van Leeuwenhoek 2021; 114:1141-1153. [PMID: 33945065 DOI: 10.1007/s10482-021-01584-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 04/17/2021] [Indexed: 11/28/2022]
Abstract
The NCW2 gene was recently described as encoding a GPI-bounded protein that assists in the re-modelling of the Saccharomyces cerevisiae cell wall (CW) and in the repair of damage caused by the polyhexamethylene biguanide (PHMB) polymer to the cell wall. Its absence produces a re-organization of the CW structure that result in resistance to lysis by glucanase. Hence, the present study aimed to extend the analysis of the Ncw2 protein (Ncw2p) to determine its physiological role in the yeast cell surface. The results showed that Ncw2p is transported to the cell surface upon O-mannosylation mediated by the Pmt1p-Pmt2p enzyme complex. It co-localises with the yeast bud scars, a region in cell surface formed by chitin deposition. Once there, Ncw2p enables correct chitin/β-glucan structuring during the exponential growth. The increase in molecular mass by hyper-mannosylation coincides with the increasing in chitin deposition, and leads to glucanase resistance. Treatment of the yeast cells with PHMB produced the same biological effects observed for the passage from exponential to stationary growth phase. This might be a possible mechanism of yeast protection against cationic biocides. In conclusion, we propose that Ncw2p takes part in the mechanism involved in the control of cell surface rigidity by aiding on the linkage between chitin and glucan layers in the modelling of the cell wall during cell growth.
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Affiliation(s)
- Maise Gomes Queiroz
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | - Carolina Elsztein
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | - Sabine Strahl
- Laboratory of Glycobiology, Centre for Organismal Studies, University of Heidelberg, Heidelberg, Germany
| | - Marcos Antonio de Morais Junior
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife, Brazil. .,Departamento de Genética, Universidade Federal de Pernambuco, Av. Moraes Rego, 1235, Cidade Universitária, Recife, PE, 50.670-901, Brasil.
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16
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Abstract
Fungi are eukaryotic microorganisms that show complex life cycles, including both anamorph and teleomorph stages. Beta-1,3-1,6-glucans (BGs) are major cell wall components in fungi. BGs are also found in a soluble form and are secreted by fungal cells. Studies of fungal BGs extensively expanded from 1960 to 1990 due to their applications in cancer immunotherapy. However, progress in this field slowed down due to the low efficacy of such therapies. In the early 21st century, the discovery of C-type lectin receptors significantly enhanced the molecular understanding of innate immunity. Moreover, pathogen-associated molecular patterns (PAMPs) and pattern recognition receptors (PRRs) were also discovered. Soon, dectin-1 was identified as the PRR of BGs, whereas BGs were established as PAMPs. Then, studies on fungal BGs focused on their participation in the development of deep-seated mycoses and on their role as a source of functional foods. Fungal BGs may have numerous and complex linkages, making it difficult to systematize them even at the primary structure level. Moreover, elucidating the structure of BGs is largely hindered by the multiplicity of genes involved in cell wall biosynthesis, including those for BGs, and by fungal diversity. The present review mainly focused on the characteristics of fungal BGs from the viewpoint of structure and immunological activities.
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17
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Moreno-Martínez AE, Gómez-Molero E, Sánchez-Virosta P, Dekker HL, de Boer A, Eraso E, Bader O, de Groot PWJ. High Biofilm Formation of Non-Smooth Candida parapsilosis Correlates with Increased Incorporation of GPI-Modified Wall Adhesins. Pathogens 2021; 10:pathogens10040493. [PMID: 33921809 PMCID: PMC8073168 DOI: 10.3390/pathogens10040493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022] Open
Abstract
Candida parapsilosis is among the most frequent causes of candidiasis. Clinical isolates of this species show large variations in colony morphotype, ranging from round and smooth to a variety of non-smooth irregular colony shapes. A non-smooth appearance is related to increased formation of pseudohyphae, higher capacity to form biofilms on abiotic surfaces, and invading agar. Here, we present a comprehensive study of the cell wall proteome of C. parapsilosis reference strain CDC317 and seven clinical isolates under planktonic and sessile conditions. This analysis resulted in the identification of 40 wall proteins, most of them homologs of known Candida albicans cell wall proteins, such as Gas, Crh, Bgl2, Cht2, Ecm33, Sap, Sod, Plb, Pir, Pga30, Pga59, and adhesin family members. Comparative analysis of exponentially growing and stationary phase planktonic cultures of CDC317 at 30 °C and 37 °C revealed only minor variations. However, comparison of smooth isolates to non-smooth isolates with high biofilm formation capacity showed an increase in abundance and diversity of putative wall adhesins from Als, Iff/Hyr, and Hwp families in the latter. This difference depended more strongly on strain phenotype than on the growth conditions, as it was observed in planktonic as well as biofilm cells. Thus, in the set of isolates analyzed, the high biofilm formation capacity of non-smooth C. parapsilosis isolates with elongated cellular phenotypes correlates with the increased surface expression of putative wall adhesins in accordance with their proposed cellular function.
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Affiliation(s)
- Ana Esther Moreno-Martínez
- Albacete Regional Center for Biomedical Research, Castilla—La Mancha Science & Technology Park, University of Castilla-La Mancha, 02008 Albacete, Spain; (A.E.M.-M.); (E.G.-M.); (P.S.-V.); (A.d.B.)
| | - Emilia Gómez-Molero
- Albacete Regional Center for Biomedical Research, Castilla—La Mancha Science & Technology Park, University of Castilla-La Mancha, 02008 Albacete, Spain; (A.E.M.-M.); (E.G.-M.); (P.S.-V.); (A.d.B.)
- Institute for Medical Microbiology, University Medical Center Göttingen, Kreuzbergring 57, 37075 Göttingen, Germany
| | - Pablo Sánchez-Virosta
- Albacete Regional Center for Biomedical Research, Castilla—La Mancha Science & Technology Park, University of Castilla-La Mancha, 02008 Albacete, Spain; (A.E.M.-M.); (E.G.-M.); (P.S.-V.); (A.d.B.)
| | - Henk L. Dekker
- Mass Spectrometry of Biomolecules, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH Amsterdam, The Netherlands;
| | - Albert de Boer
- Albacete Regional Center for Biomedical Research, Castilla—La Mancha Science & Technology Park, University of Castilla-La Mancha, 02008 Albacete, Spain; (A.E.M.-M.); (E.G.-M.); (P.S.-V.); (A.d.B.)
| | - Elena Eraso
- Department of Immunology, Microbiology and Parasitology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), 48940 Bilbao, Spain;
| | - Oliver Bader
- Institute for Medical Microbiology, University Medical Center Göttingen, Kreuzbergring 57, 37075 Göttingen, Germany
- Correspondence: (O.B.); (P.W.J.d.G.)
| | - Piet W. J. de Groot
- Albacete Regional Center for Biomedical Research, Castilla—La Mancha Science & Technology Park, University of Castilla-La Mancha, 02008 Albacete, Spain; (A.E.M.-M.); (E.G.-M.); (P.S.-V.); (A.d.B.)
- Correspondence: (O.B.); (P.W.J.d.G.)
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Wang Q, Pokhrel A, Coleman JJ. The Extracellular Superoxide Dismutase Sod5 From Fusarium oxysporum Is Localized in Response to External Stimuli and Contributes to Fungal Pathogenicity. FRONTIERS IN PLANT SCIENCE 2021; 12:608861. [PMID: 33737941 PMCID: PMC7960929 DOI: 10.3389/fpls.2021.608861] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
Reactive oxygen species (ROS) produced by hosts serve as a general defense mechanism against various pathogens. At the interaction site between the host and pathogen, host cells rapidly accumulate high concentrations of ROS, called the oxidative burst, that damage and kill the invading microbes. However, successful pathogens usually survive in a high ROS environment and have evolved strategies to overcome these detrimental effects. Here we characterized the biological function of the extracellular superoxide dismutase (SOD) FoSod5 from Fusarium oxysporum f. sp. vasinfectum. FoSOD5 is strongly up-regulated during infection of cotton, and a ΔFoSOD5 mutant was significantly reduced in virulence on cotton. Purified 6 × His-FoSod5 could significantly inhibit the reduction of NBT and WST-1, indicating that FoSod5 was a functional SOD protein. Based on CRISPR/Cas9 technology, several different FoSod5 variants were generated and used to assess the secretion, expression, and subcellular localization of FoSod5 in F. oxysporum. The subcellular localization of FoSod5 is altered under different environmental conditions. During normal growth conditions, FoSod5 was primarily localized to the phialides; however, in a nutrient-limited environment, FoSod5 was localized to a wide array of fungal structures including the septum and cell wall. FoSod5 is an alkaline-induced glycosylphosphatidylinositol (GPI) protein and the GPI anchor was required for proper protein subcellular localization. The multiple mechanisms fungi utilize to tolerate the oxidative burst is indicative of the importance of this plant defense response; however, the presence of a conserved extracellular SOD in many phytopathogenic fungi suggests tolerance to ROS is initiated prior to the ROS entering the fungal cell.
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Zhang Y, Fang W, Raimi OG, Lockhart DEA, Ferenbach AT, Lu L, van Aalten DMF. Genetic and structural validation of phosphomannomutase as a cell wall target in Aspergillus fumigatus. Mol Microbiol 2021; 116:245-259. [PMID: 33629421 DOI: 10.1111/mmi.14706] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/03/2021] [Accepted: 02/15/2021] [Indexed: 11/29/2022]
Abstract
Aspergillus fumigatus is an opportunistic mold responsible for severe life-threatening fungal infections in immunocompromised patients. The cell wall, an essential structure composed of glucan, chitin, and galactomannan, is considered to be a target for the development of antifungal drugs. The nucleotide sugar donor GDP-mannose (GDP-Man) is required for the biosynthesis of galactomannan, glycosylphosphatidylinositol (GPI) anchors, glycolipid, and protein glycosylation. Starting from fructose-6-phosphate, GDP-Man is produced by the sequential action of the enzymes phosphomannose isomerase, phosphomannomutase (Pmm), and GDP-mannose pyrophosphorylase. Here, using heterokaryon rescue and gene knockdown approaches we demonstrate that the phosphomannomutase encoding gene in A. fumigatus (pmmA) is essential for survival. Reduced expression of pmmA is associated with significant morphological defects including retarded germination, growth, reduced conidiation, and abnormal polarity. Moreover, the knockdown strain exhibited an altered cell wall organization and sensitivity toward cell wall perturbing agents. By solving the first crystal structure of A. fumigatus phosphomannomutase (AfPmmA) we identified non-conservative substitutions near the active site when compared to the human orthologues. Taken together, this work provides a genetic and structural foundation for the exploitation of AfPmmA as a potential antifungal target.
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Affiliation(s)
- Yuanwei Zhang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,School of Life Sciences, University of Dundee, Dundee, UK
| | - Wenxia Fang
- School of Life Sciences, University of Dundee, Dundee, UK.,National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, China
| | | | | | | | - Ling Lu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
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20
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Qiu Y, Bi J, Jin X, Hu L, Lyu J, Wu X. An understanding of the changes in water holding capacity of rehydrated shiitake mushroom (Lentinula edodes) from cell wall, cell membrane and protein. Food Chem 2021; 351:129230. [PMID: 33626468 DOI: 10.1016/j.foodchem.2021.129230] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 11/29/2022]
Abstract
Water holding capacity (WHC) is an important factor for the evaluation of rehydrated shiitake mushroom as WHC largely affects sensory attributes. Here, WHC of the rehydrated shiitake mushroom as affected by different hot-air drying temperature was investigated from aspects of cell membrane integrity, status of cell wall fibrous material and protein denaturation. Among the three factors, protein denaturation played the most important role to affect the WHC of rehydrated mushroom as protein denaturation was closely related to the maintenance of porous structure after rehydration. Effect of status of the cell wall fibrous material to the WHC changes was relatively weak and was largely correlated to the WHC changes at high temperature (>80 °C). Cell membrane was unlikely to contribute to WHC changes of the rehydrated shiitake mushroom due to the loss of integrity.
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Affiliation(s)
- Yang Qiu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS) / Key, Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Jinfeng Bi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS) / Key, Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China.
| | - Xin Jin
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS) / Key, Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China.
| | - Lina Hu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS) / Key, Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Jian Lyu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS) / Key, Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Xinye Wu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS) / Key, Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
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21
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Ye M, Ye Y, Du Z, Chen G. Cell-surface engineering of yeasts for whole-cell biocatalysts. Bioprocess Biosyst Eng 2021; 44:1003-1019. [PMID: 33389168 DOI: 10.1007/s00449-020-02484-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 11/16/2020] [Indexed: 01/23/2023]
Abstract
Due to the unique advantages comparing with traditional free enzymes and chemical catalysis, whole-cell biocatalysts have been widely used to catalyze reactions effectively, simply and environment friendly. Cell-surface display technology provides a novel and effective approach for improved whole-cell biocatalysts expressing heterologous enzymes on the cell surface. They can overcome the substrate transport limitation of the intracellular expression and provide the enzymes with enhanced properties. Among all the host surface-displaying microorganisms, yeast is ideally suitable for constructing whole cell-surface-displaying biocatalyst, because of the large cell size, the generally regarded as safe (GRAS) status, and the perfect post-translational processing of secreted proteins. Yeast cell-surface display system has been a promising and powerful method for development of novel and improved engineered biocatalysts. In this review, the characterization and principles of yeast cell-surface display and the applications of yeast cell-surface display in engineered whole-cell biocatalysts as well as the improvement of the enzyme efficiency are summarized and discussed.
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Affiliation(s)
- Mengqi Ye
- Marine College, Shandong University, Weihai, 264209, China
| | - Yuqi Ye
- Marine College, Shandong University, Weihai, 264209, China
| | - Zongjun Du
- Marine College, Shandong University, Weihai, 264209, China
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China
| | - Guanjun Chen
- Marine College, Shandong University, Weihai, 264209, China.
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China.
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22
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Li J, Karboune S, Sedman J, Ismail A. Characterization of the structural properties of mannoproteins isolated from selected yeast-based products upon the enzymatic treatment. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109596] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Liu C, Xing J, Cai X, Hendy A, He W, Yang J, Huang J, Peng YL, Ryder L, Chen XL. GPI7-mediated glycosylphosphatidylinositol anchoring regulates appressorial penetration and immune evasion during infection of Magnaporthe oryzae. Environ Microbiol 2020; 22:2581-2595. [PMID: 32064718 DOI: 10.1111/1462-2920.14941] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 02/12/2020] [Indexed: 12/30/2022]
Abstract
Glycosylphosphatidylinositol (GPI) anchoring plays key roles in many biological processes by targeting proteins to the cell wall; however, its roles are largely unknown in plant pathogenic fungi. Here, we reveal the roles of the GPI anchoring in Magnaporthe oryzae during plant infection. The GPI-anchored proteins were found to highly accumulate in appressoria and invasive hyphae. Disruption of GPI7, a GPI anchor-pathway gene, led to a significant reduction in virulence. The Δgpi7 mutant showed significant defects in penetration and invasive growth. This mutant also displayed defects of the cell wall architecture, suggesting GPI7 is required for cell wall biogenesis. Removal of GPI-anchored proteins in the wild-type strain by hydrofluoric acid (HF) pyridine treatment exposed both the chitin and β-1,3-glucans to the host immune system. Exposure of the chitin and β-1,3-glucans was also observed in the Δgpi7 mutant, indicating GPI-anchored proteins are required for immune evasion. The GPI anchoring can regulate subcellular localization of the Gel proteins in the cell wall for appressorial penetration and abundance of which for invasive growth. Our results indicate the GPI anchoring facilitates the penetration of M. oryzae into host cells by affecting the cell wall integrity and the evasion of host immune recognition.
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Affiliation(s)
- Caiyun Liu
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Junjie Xing
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Xuan Cai
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ahmed Hendy
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wenhui He
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jun Yang
- Ministry of Agriculture Key Laboratory of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
| | - Junbing Huang
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - You-Liang Peng
- Ministry of Agriculture Key Laboratory of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
| | - Lauren Ryder
- The Sainsbury Laboratory, University of East Anglia, Norwich, UK
| | - Xiao-Lin Chen
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.,State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
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24
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Gong W, Xie C, Zhou Y, Zhu Z, Wang Y, Peng Y. A Resequencing-Based Ultradense Genetic Map of Hericium erinaceus for Anchoring Genome Sequences and Identifying Genetic Loci Associated With Monokaryon Growth. Front Microbiol 2020; 10:3129. [PMID: 32082271 PMCID: PMC7005679 DOI: 10.3389/fmicb.2019.03129] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 12/24/2019] [Indexed: 11/25/2022] Open
Abstract
Hericium erinaceus has attracted tremendous interest owing to its compelling health-promoting properties. However, breeding of elite cultivars of H. erinaceus is hindered by the lack of a genetic and molecular toolbox. Here, we performed resequencing analysis of 127 F1 single-spore isolates and constructed the first high-resolution genetic map of H. erinaceus. With the use of recombination bins as markers, an ultradense genetic map consisting of 1,174 bins (including 37,082 single-nucleotide polymorphisms) was generated. This newly developed genetic map covered 1,096.5 cM, with an average bin spacing of 0.95 cM. High collinearity between genetic map and H. erinaceus genome assembly was revealed by aligning scaffolds to this genetic map using bin markers as anchors. The application of this newly developed genetic map in quantitative trait locus (QTL) mapping was also elucidated, and four QTLs for monokaryon growth were recovered. One QTL, mgr1, which contributes 12.1% of growth variations, was located near the mating type A (MAT-A) loci. Overall, this newly constructed high-resolution genetic map (or bin map) could be used as reference in future genetic, genomic, and breeding studies on H. erinaceus.
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Affiliation(s)
| | | | | | | | | | - Yuande Peng
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, China
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25
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Moreira ALE, Oliveira MAP, Silva LOS, Inácio MM, Bailão AM, Parente-Rocha JA, Cruz-Leite VRM, Paccez JD, de Almeida Soares CM, Weber SS, Borges CL. Immunoproteomic Approach of Extracellular Antigens From Paracoccidioides Species Reveals Exclusive B-Cell Epitopes. Front Microbiol 2020; 10:2968. [PMID: 32117076 PMCID: PMC7015227 DOI: 10.3389/fmicb.2019.02968] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/09/2019] [Indexed: 11/16/2022] Open
Abstract
Fungi of the Paracoccidioides genus are the etiological agents of paracoccidioidomycosis (PCM), a systemic mycosis restricted to the countries of Latin America. Currently, the Paracoccidioides complex is represented by Paracoccidioides lutzii, Paracoccidioides americana, Paracoccidioides brasiliensis, Paracoccidioides restrepiensis, and Paracoccidioides venezuelensis. Even with advances in techniques used for diagnosing fungal diseases, high rates of false-positive results for PCM are still presented. Additionally, there is no efficient antigen that can be used to follow up the efficiency of patient treatment. The immunoproteomic is considered a powerful tool for the identification of antigens. In addition, antigens are molecules recognized by the immune system, which make them excellent targets for diagnostic testing of diseases caused by microorganisms. In this vein, we investigated which antigens are secreted by species representing Paracoccidioides complex to increase the spectrum of molecules that could be used for future diagnostic tests, patient follow-up, or PCM therapy. To identify the profile of antigens secreted by Paracoccidioides spp., immunoproteomic approaches were used combining immunoprecipitation, followed by antigen identification by nanoUPLC-MSE-based proteomics. Consequently, it was possible to verify differences in the exoantigen profiles present among the studied species. Through a mass spectrometry approach, it was possible to identify 79 exoantigens in Paracoccidioides species. Using bioinformatics tools, two unique exoantigens in P. lutzii species were identified, as well as 44 epitopes exclusive to the Paracoccidioides complex and 12 unique antigenic sequences that can differentiate between Paracoccidioides species. Therefore, these results demonstrate that Paracoccidioides species have a range of B-cell epitopes exclusive to the complex as well as specific to each Paracoccidioides species. In addition, these analyses allowed us the identification of excellent biomarker candidates for epidemiology screening, diagnosis, patient follow-up, as well as new candidates for PCM therapy.
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Affiliation(s)
- André Luís Elias Moreira
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Milton Adriano Pelli Oliveira
- Laboratório de Citocinas, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Brazil
| | - Lana O'Hara Souza Silva
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Moisés Morais Inácio
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Alexandre Melo Bailão
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Juliana Alves Parente-Rocha
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Juliano Domiraci Paccez
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Simone Schneider Weber
- Laboratório de Biociência, Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição, Universidade Federal de Mato Grosso do Sul, Campo Grande, Brazil.,Instituto de Ciências Exatas e Tecnologia, Universidade Federal do Amazonas, Itacoatiara, Brazil
| | - Clayton Luiz Borges
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
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26
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Zhang YZ, Chen Q, Liu CH, Lei L, Li Y, Zhao K, Wei MQ, Guo ZR, Wang Y, Xu BJ, Jiang YF, Kong L, Liu YL, Lan XJ, Jiang QT, Ma J, Wang JR, Chen GY, Wei YM, Zheng YL, Qi PF. Fusarium graminearum FgCWM1 Encodes a Cell Wall Mannoprotein Conferring Sensitivity to Salicylic Acid and Virulence to Wheat. Toxins (Basel) 2019; 11:toxins11110628. [PMID: 31671876 PMCID: PMC6891299 DOI: 10.3390/toxins11110628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/23/2019] [Accepted: 10/24/2019] [Indexed: 11/30/2022] Open
Abstract
Fusarium graminearum causes Fusarium head blight (FHB), a devastating disease of wheat. Salicylic acid (SA) is involved in the resistance of wheat to F. graminearum. Cell wall mannoprotein (CWM) is known to trigger defense responses in plants, but its role in the pathogenicity of F. graminearum remains unclear. Here, we characterized FgCWM1 (FG05_11315), encoding a CWM in F. graminearum. FgCWM1 was highly expressed in wheat spikes by 24 h after initial inoculation and was upregulated by SA. Disruption of FgCWM1 (ΔFgCWM1) reduced mannose and protein accumulation in the fungal cell wall, especially under SA treatment, and resulted in defective fungal cell walls, leading to increased fungal sensitivity to SA. The positive role of FgCWM1 in mannose and protein accumulation was confirmed by its expression in Saccharomyces cerevisiae. Compared with wild type (WT), ΔFgCWM1 exhibited reduced pathogenicity toward wheat, but it produced the same amount of deoxynivalenol both in culture and in spikes. Complementation of ΔFgCWM1 with FgCWM1 restored the WT phenotype. Localization analyses revealed that FgCWM1 was distributed on the cell wall, consistent with its structural role. Thus, FgCWM1 encodes a CWM protein that plays an important role in the cell wall integrity and pathogenicity of F. graminearum.
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Affiliation(s)
- Ya-Zhou Zhang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Qing Chen
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Cai-Hong Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Lu Lei
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yang Li
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Kan Zhao
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Mei-Qiao Wei
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Zhen-Ru Guo
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yan Wang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Bin-Jie Xu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yun-Feng Jiang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Li Kong
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yan-Lin Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Xiu-Jin Lan
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Qian-Tao Jiang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Jian Ma
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Ji-Rui Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Guo-Yue Chen
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yu-Ming Wei
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - You-Liang Zheng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Peng-Fei Qi
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
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27
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Patel PK, Free SJ. The Genetics and Biochemistry of Cell Wall Structure and Synthesis in Neurospora crassa, a Model Filamentous Fungus. Front Microbiol 2019; 10:2294. [PMID: 31649638 PMCID: PMC6796803 DOI: 10.3389/fmicb.2019.02294] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 09/20/2019] [Indexed: 01/25/2023] Open
Abstract
This review discusses the wealth of information available for the N. crassa cell wall. The basic organization and structure of the cell wall is presented and how the wall changes during the N. crassa life cycle is discussed. Over forty cell wall glycoproteins have been identified by proteomic analyses. Genetic and biochemical studies have identified many of the key enzymes needed for cell wall biogenesis, and the roles these enzymes play in cell wall biogenesis are discussed. The review includes a discussion of how the major cell wall components (chitin, β-1,3-glucan, mixed β-1,3-/ β-1,4- glucans, glycoproteins, and melanin) are synthesized and incorporated into the cell wall. We present a four-step model for how cell wall glycoproteins are covalently incorporated into the cell wall. In N. crassa, the covalent incorporation of cell wall glycoproteins into the wall occurs through a glycosidic linkage between lichenin (a mixed β-1,3-/β-1,4- glucan) and a "processed" galactomannan that has been attached to the glycoprotein N-linked oligosaccharides. The first step is the addition of the galactomannan to the N-linked oligosaccharide. Mutants affected in galactomannan formation are unable to incorporate glycoproteins into their cell walls. The second step is carried out by the enzymes from the GH76 family of α-1,6-mannanases, which cleave the galactomannan to generate a processed galactomannan. The model suggests that the third and fourth steps are carried out by members of the GH72 family of glucanosyltransferases. In the third step the glucanosyltransferases cleave lichenin and generate enzyme/substrate intermediates in which the lichenin is covalently attached to the active site of the glucanosyltransferases. In the final step, the glucanosyltransferases attach the lichenin onto the processed galactomannans, which creates new glycosidic bonds and effectively incorporates the glycoproteins into the cross-linked cell wall glucan/chitin matrix.
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Affiliation(s)
| | - Stephen J. Free
- Department of Biological Sciences, SUNY University at Buffalo, Buffalo, NY, United States
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28
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Rosenzweig R, Marshall M, Parivar A, Ly VK, Pearlman E, Yee AF. Biomimetic Nanopillared Surfaces Inhibit Drug Resistant Filamentous Fungal Growth. ACS APPLIED BIO MATERIALS 2019; 2:3159-3163. [PMID: 35030760 DOI: 10.1021/acsabm.9b00290] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Filamentous fungi are invasive and multidrug resistant pathogens that commonly contaminate biomedical devices and implants. Once spherical fungal spores attach to a surface, they exhibit germ tube development, hyphal growth, and robust biofilm formation. Nanotopography found on plants, reptiles, and insect wings possess bactericidal properties during prokaryotic cell adhesion. Here, we demonstrate the application of biomimetic nanopillars that inhibit eukaryotic filamentous fungal growth and possess fungicidal properties. Furthermore, many spores on the nanopillars appeared deflated, while those on the flat surfaces remained spherical and intact. These antifungal phenomena provide promising applications in antifouling biointerfaces for biomedical devices and implants.
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29
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Ouyang H, Du T, Zhou H, Wilson IBH, Yang J, Latgé JP, Jin C. Aspergillus fumigatus phosphoethanolamine transferase gene gpi7 is required for proper transportation of the cell wall GPI-anchored proteins and polarized growth. Sci Rep 2019; 9:5857. [PMID: 30971734 PMCID: PMC6458175 DOI: 10.1038/s41598-019-42344-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/21/2019] [Indexed: 01/10/2023] Open
Abstract
In fungi many proteins, which play important roles in maintaining the function of the cell wall and participating in pathogenic processes, are anchored to the cell surface by a glycosylphosphatidylinositol (GPI) anchor. It has been known that modification and removal of phosphoethanolamine (EtN-P) on the second mannose residue in GPI anchors is important for maturation and sorting of GPI anchored proteins in yeast and mammalian cells, but is a step absent from some protist parasites. In Aspergillus fumigatus, an opportunistic fungal pathogen causing invasive aspergillosis in humans, GPI-anchored proteins are known to be involved in cell wall synthesis and virulence. In this report the gene encoding A. fumigatus EtN-P transferase GPI7 was investigated. By deletion of the gpi7 gene, we evaluated the effects of EtN-P modification on the morphogenesis of A. fumigatus and localization of GPI proteins. Our results showed that deletion of the gpi7 gene led to reduced cell membrane GPI anchored proteins, the mis-localization of the cell wall GPI anchored protein Mp1, abnormal polarity, and autophagy in A. fumigatus. Our results suggest that addition of EtN-P of the second mannose on the GPI anchor is essential for transportation and localization of the cell wall GPI-anchored proteins.
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Affiliation(s)
- Haomiao Ouyang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Ting Du
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Hui Zhou
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Iain B H Wilson
- Department of Chemistry, University of Natural Resources and Life Sciences, Vienna, A-1190, Austria
| | - Jinghua Yang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jean-Paul Latgé
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Cheng Jin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China. .,Guangxi Academy of Sciences, Nanning, 530007, Guangxi, China.
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30
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Araújo DS, Pereira M, Portis IG, dos Santos Junior ADCM, Fontes W, de Sousa MV, Assunção LDP, Baeza LC, Bailão AM, Ricart CAO, Brock M, Soares CMDA. Metabolic Peculiarities of Paracoccidioides brasiliensis Dimorphism as Demonstrated by iTRAQ Labeling Proteomics. Front Microbiol 2019; 10:555. [PMID: 30949151 PMCID: PMC6436475 DOI: 10.3389/fmicb.2019.00555] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/04/2019] [Indexed: 01/29/2023] Open
Abstract
Paracoccidioidomycosis (PCM), a systemic mycosis with a high incidence in Latin America, is caused by thermodimorphic fungi of the Paracoccidioides genus. The contact with host occurs by the inhalation of conidia or mycelial propagules which once reaching the pulmonary alveoli differentiate into yeast cells. This transition process is vital in the pathogenesis of PCM allowing the fungus survival in the host. Thus, the present work performed a comparative proteome analysis of mycelia, mycelia-to-yeast transition, and yeast cells of Paracoccidioides brasiliensis. For that, tryptic peptides were labeled with iTRAQ and identified by LC-MS/MS and computational data analysis, which allowed the identification of 312 proteins differentially expressed in different morphological stages. Data showed that P. brasiliensis yeast cells preferentially employ aerobic beta-oxidation and the tricarboxylic acid cycle accompanied by oxidative phosphorylation for ATP production, in comparison to mycelia and the transition from mycelia-to-yeast cells. Furthermore, yeast cells show a metabolic reprogramming in amino acid metabolism and in the induction of virulence determinants and heat shock proteins allowing adaptation to environmental conditions during the increase of the temperature. In opposite of that, the alcoholic fermentation found to P. lutzii, at least under laboratory conditions, is strongly favored in mycelium compared to yeast cells. Thereby, the data strongly support substantial metabolic differences among members of the Paracoccidioides complex, when comparing the saprobiotic mycelia and the yeast parasitic phases.
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Affiliation(s)
- Danielle Silva Araújo
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
- Laboratório de Bioquímica e Química de Proteínas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Brazil
- Faculdade Unida de Campinas, Goiânia, Brazil
| | - Maristela Pereira
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Igor Godinho Portis
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Wagner Fontes
- Laboratório de Bioquímica e Química de Proteínas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Brazil
| | - Marcelo Valle de Sousa
- Laboratório de Bioquímica e Química de Proteínas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Brazil
| | - Leandro do Prado Assunção
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Lilian Cristiane Baeza
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Alexandre Mello Bailão
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Carlos André Ornelas Ricart
- Laboratório de Bioquímica e Química de Proteínas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Brazil
| | - Matthias Brock
- Fungal Biology and Genetics Group, University of Nottingham, Nottingham, United Kingdom
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Verdín J, Sánchez-León E, Rico-Ramírez AM, Martínez-Núñez L, Fajardo-Somera RA, Riquelme M. Off the wall: The rhyme and reason of Neurospora crassa hyphal morphogenesis. ACTA ACUST UNITED AC 2019; 5:100020. [PMID: 32743136 PMCID: PMC7389182 DOI: 10.1016/j.tcsw.2019.100020] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 02/07/2019] [Accepted: 02/10/2019] [Indexed: 12/11/2022]
Abstract
Chitin and β-1,3-glucan synthases are transported separately in chitosomes and macrovesicles. Chitin synthases occupy the core of the SPK; β-1,3-glucan synthases the outer layer. CHS-4 arrival to the SPK and septa is CSE-7 dependent. Rabs YPT-1 and YPT-31 localization at the SPK mimics that of chitosomes and macrovesicles. The exocyst acts as a tether between the SPK outer layer vesicles and the apical PM.
The fungal cell wall building processes are the ultimate determinants of hyphal shape. In Neurospora crassa the main cell wall components, β-1,3-glucan and chitin, are synthesized by enzymes conveyed by specialized vesicles to the hyphal tip. These vesicles follow different secretory routes, which are delicately coordinated by cargo-specific Rab GTPases until their accumulation at the Spitzenkörper. From there, the exocyst mediates the docking of secretory vesicles to the plasma membrane, where they ultimately get fused. Although significant progress has been done on the cellular mechanisms that carry cell wall synthesizing enzymes from the endoplasmic reticulum to hyphal tips, a lot of information is still missing. Here, the current knowledge on N. crassa cell wall composition and biosynthesis is presented with an emphasis on the underlying molecular and cellular secretory processes.
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Key Words
- BGT, β-1,3-glucan transferases
- CHS, chitin synthase
- CLSM, confocal laser scanning microscopy
- CWI, cell wall integrity
- CWP, cell wall proteins
- Cell wall
- ER, endoplasmic reticulum
- FRAP, fluorescence recovery after photobleaching
- GEF, guanine nucleotide exchange factor
- GFP, green fluorescent protein
- GH, glycosyl hydrolases
- GPI, glycosylphosphatidylinositol
- GSC, β-1,3-glucan synthase complex
- MMD, myosin-like motor domain
- MS, mass spectrometry
- MT, microtubule
- NEC, network of elongated cisternae
- PM, plasma membrane
- SPK, Spitzenkörper
- Spitzenkörper
- TIRFM, total internal reflection fluorescence microscopy
- TM, transmembrane
- Tip growth
- Vesicles
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Affiliation(s)
- Jorge Verdín
- Industrial Biotechnology, CIATEJ-Jalisco State Scientific Research and Technology Assistance Center, Mexico National Council for Science and Technology, Zapopan, Jalisco, Mexico
| | - Eddy Sánchez-León
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
| | - Adriana M Rico-Ramírez
- Department of Microbiology, Centro de Investigación Científica y de Educación Superior de Ensenada, CICESE Ensenada, Baja California, Mexico
| | - Leonora Martínez-Núñez
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, USA
| | - Rosa A Fajardo-Somera
- Karlsruhe Institute of Technology (KIT) South Campus, Institute for Applied Biosciences, Department of Microbiology, Karlsruhe, Germany
| | - Meritxell Riquelme
- Department of Microbiology, Centro de Investigación Científica y de Educación Superior de Ensenada, CICESE Ensenada, Baja California, Mexico
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Characterisation of novel-cell-wall LysM-domain proteins LdpA and LdpB from the human pathogenic fungus Aspergillus fumigatus. Sci Rep 2019; 9:3345. [PMID: 30833675 PMCID: PMC6399445 DOI: 10.1038/s41598-019-40039-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/04/2019] [Indexed: 12/29/2022] Open
Abstract
Aspergillus fumigatus, a filamentous fungus that is ubiquitous in the environment, causes several human pulmonary disorders, including chronic and acute invasive infections and allergic diseases. Lysin motif (LysM) is a small protein domain that binds chitin, a major component of fungal cell wall polysaccharides. Several secreted LysM-domain proteins without catalytic function (LysM effectors) have been identified. They act as virulence factors in plant pathogenic fungi by preventing the immune response induced by chitin; however, LysM proteins in mammalian pathogenic fungi remain largely unexplored. We describe two novel LysM-domain proteins, LdpA and LdpB, in A. fumigatus. Functional analyses of single and double knockouts revealed no significant effects on cell wall chitin content, cell wall integrity, fungal morphology and fungal growth. Fluorescent signals from LdpA-green fluorescent protein (GFP) and LdpB-GFP were observed in cell wall and extracellular matrix. In a mouse model of invasive pulmonary aspergillosis, survival did not differ between ΔldpA/B and wild-type infection; however, further studies are required to reveal their functions in fungal−host interactions.
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Identification and evaluation of novel anchoring proteins for cell surface display on Saccharomyces cerevisiae. Appl Microbiol Biotechnol 2019; 103:3085-3097. [PMID: 30737536 DOI: 10.1007/s00253-019-09667-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 01/11/2019] [Accepted: 01/20/2019] [Indexed: 12/11/2022]
Abstract
The development of arming yeast strains as whole-cell biocatalysts involves a selection of effective anchoring proteins to display enzymes and proteins on yeast cell surface. To screen for novel anchoring proteins with improved efficiency, a bioinformatics pipeline for the identification of glycosylphosphatidylinositol-anchored cell wall proteins (GPI-CWPs) suitable for attaching passenger proteins to the cell surface of Saccharomyces cerevisiae has been developed. Here, the C-terminal sequences (CTSs) of putative GPI-CWPs were selected based on the criteria that the sequence must contain a serine/threonine-rich (S/T) region of at least 30% S/T content, a total threonine content of at least 10%, a continuous S/T stretch of at least 130 amino acids in length, and a continuous T-rich region of at least 10 amino acids in length. Of the predicted 790 proteins, 37 putative GPI-CWPs were selected from different yeast and fungal species to be evaluated for their performance in displaying yeast-enhanced green fluorescent protein and β-glucosidase enzyme. This led to the identification of five novel anchoring proteins with higher performance compared to α-agglutinin used as benchmark. In particular, the CTS of uncharacterized protein in Kluyveromyces lactis, namely 6_Kl, is the most efficient anchoring protein of the group. The CTS of 6_Kl protein provided a β-glucosidase activity of up to 23.5 U/g cell dry weight, which is 2.8 times higher than that of the CTS of α-agglutinin. These identified CTSs could be potential novel anchoring protein candidates for construction of efficient arming yeasts for biotechnology applications in the future.
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Ahumada-Rudolph R, Novoa V, Becerra J. Morphological response to salinity, temperature, and pH changes by marine fungus Epicoccum nigrum. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 191:35. [PMID: 30593600 DOI: 10.1007/s10661-018-7166-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
Epicoccum nigrum (strain LQRA39-P) was isolated from sediments collected in Chilean Patagonian fjords using microscopy and molecular techniques. We analyzed adaptive responses of cell wall morphology to salinity, temperature, and pH in order to explain the ability of E. nigrum to co-inhabit both marine and freshwater environments. For this purpose, E. nigrum was cultured in a series of media with variations in salinity (freshwater and seawater), pH (acidic, neutral, and basic), and temperature (5 to 25 °C). Changes were observed through transmission electron microscopy. A direct correlation between increased salinity and cell wall thickening (> 0.2 μm) was observed, along with a significant relationship between pH and the presence of extracellular polymeric substances (EPS) on the outside of the cell wall. The observed morphological changes could confirm that an ubiquitous fungus such as E. nigrum requires adaptive responses to co-inhabit freshwater, marine, and terrestrial substrates.
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Affiliation(s)
- Ramón Ahumada-Rudolph
- Laboratorio de Bioprocesos y Biotratamientos, Departamento de Ingeniería en Maderas, Universidad del Bío-Bío, Collao 1202, PO Box 5-C, Concepción, Chile
| | - Vanessa Novoa
- Department of Geography, School of Architecture, Urbanism and Geography, Universidad de Concepción, Víctor Lamas 1290, PO Box 160-C, Concepción, Chile.
| | - José Becerra
- Laboratorio de Química de Productos Naturales, Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Víctor Lamas 1290, PO Box 160-C, Concepción, Chile
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35
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A comparative study for the isolation and characterization of mannoproteins from Saccharomyces cerevisiae yeast cell wall. Int J Biol Macromol 2018; 119:654-661. [DOI: 10.1016/j.ijbiomac.2018.07.102] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 07/08/2018] [Accepted: 07/16/2018] [Indexed: 11/22/2022]
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36
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Pérez P, Cortés JC, Cansado J, Ribas JC. Fission yeast cell wall biosynthesis and cell integrity signalling. ACTA ACUST UNITED AC 2018; 4:1-9. [PMID: 32743131 PMCID: PMC7388972 DOI: 10.1016/j.tcsw.2018.10.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 10/04/2018] [Accepted: 10/09/2018] [Indexed: 02/02/2023]
Abstract
The cell wall is a structure external to the plasma membrane that is essential for the survival of the fungi. This polysaccharidic structure confers resistance to the cell internal turgor pressure and protection against mechanical injury. The fungal wall is also responsible for the shape of these organisms due to different structural polysaccharides, such as β-(1,3)-glucan, which form fibers and confer rigidity to the cell wall. These polysaccharides are not present in animal cells and therefore they constitute excellent targets for antifungal chemotherapies. Cell wall damage leads to the activation of MAPK signaling pathways, which respond to the damage by activating the repair of the wall and the maintenance of the cell integrity. Fission yeast Schizosaccharomyces pombe is a model organism for the study morphogenesis, cell wall, and how different inputs might regulate this structure. We present here a short overview of the fission yeast wall composition and provide information about the main biosynthetic activities that assemble this cell wall. Additionally, we comment the recent advances in the knowledge of the cell wall functions and discuss the role of the cell integrity MAPK signaling pathway in the regulation of fission yeast wall.
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Affiliation(s)
- Pilar Pérez
- Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas and Universidad de Salamanca, 37007 Salamanca, Spain
- Corresponding author.
| | - Juan C.G. Cortés
- Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas and Universidad de Salamanca, 37007 Salamanca, Spain
| | - Jose Cansado
- Yeast Physiology Group, Department of Genetics and Microbiology, Facultad de Biología, Universidad de Murcia, 30071 Murcia, Spain
| | - Juan C. Ribas
- Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas and Universidad de Salamanca, 37007 Salamanca, Spain
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37
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Massa N, Cantamessa S, Novello G, Ranzato E, Martinotti S, Pavan M, Rocchetti A, Berta G, Gamalero E, Bona E. Antifungal activity of essential oils against azole-resistant and azole-susceptible vaginal Candida glabrata strains. Can J Microbiol 2018; 64:647-663. [DOI: 10.1139/cjm-2018-0082] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Candida glabrata is an opportunistic pathogen, associated with endocarditis, meningitis, and disseminated disease, and also with complicated vaginitis. Essential oils derived from aromatic plants are known in traditional medicine as antimicrobial agents and have antifungal properties. The aim of this work was to evaluate whether 12 tested essential oils (tea tree, laurel, anise, basil, bergamot, lavender, mint, oregano, grapefruit, rosemary, winter savory, and ginger) could have a transverse effect on C. glabrata sensitive strains but above all on strains resistant to the three main azole antifungals used (clotrimazole, fluconazole, itraconazole). For this reason, different strains of C. glabrata, vaginal isolated, were characterized (disk diffusion assay, minimal inhibitory concentration) with respect to their response to such antifungals. Electron microscopy analyses were performed to examine cellular damages in depth. Subsequently, we wanted to evaluate the effect of the oils on human cells to estimate their potential cytotoxicity. Oregano and winter savory were the two most effective essential oils, inducing growth inhibition, cell damage of C. glabrata strains (both sensitive and resistant to azole antifungal drugs), and medium–high level of toxicity against human keratinocytes. The results of this work support the research for new alternatives or complementary therapies against vaginal candidiasis.
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Affiliation(s)
- N. Massa
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - S. Cantamessa
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - G. Novello
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - E. Ranzato
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Piazza San Eusebio 5, 13100 Vercelli, Italy
| | - S. Martinotti
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - M. Pavan
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - A. Rocchetti
- Azienda Sanitaria Santi Antonio, Biagio e Cesare Arrigo, Via Venezia 16, 15121 Alessandria, Italy
| | - G. Berta
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - E. Gamalero
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy
| | - E. Bona
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Piazza San Eusebio 5, 13100 Vercelli, Italy
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38
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Yoko-O T, Umemura M, Komatsuzaki A, Ikeda K, Ichikawa D, Takase K, Kanzawa N, Saito K, Kinoshita T, Taguchi R, Jigami Y. Lipid moiety of glycosylphosphatidylinositol-anchored proteins contributes to the determination of their final destination in yeast. Genes Cells 2018; 23:880-892. [PMID: 30133879 DOI: 10.1111/gtc.12636] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/06/2018] [Accepted: 08/06/2018] [Indexed: 01/31/2023]
Abstract
Yeasts have two classes of glycosylphosphatidylinositol (GPI)-anchored proteins; one is transferred to the cell wall, whereas the other is retained on the plasma membrane. The lipid moieties of the GPI in Saccharomyces cerevisiae consist of either phosphatidylinositol (PI) or inositolphosphorylceramide (IPC). Cwh43p is involved in the remodeling of lipid from PI to IPC. We found that the GPI lipid moiety of Cwp2p in wild-type cells is PI. To elucidate the physiological role of the lipid remodeling by Cwh43p, we investigated the distribution of Gas1p and Cwp2p by immunoblotting and found that Gas1p with the PI-form GPI lipid moiety in cwh43∆ mutant cells tends to be localized to the cell wall, suggesting that the IPC species in the GPI lipid moiety contributes to the retention of GPI-anchored proteins on the plasma membrane. We also found that CWH43 is genetically related to TED1, which encodes a protein involved in the removal of the ethanolamine phosphate from the second mannose residue in GPI glycan moieties. We propose possible models for the physiological function of Cwh43p and Ted1p in the transfer of GPI-anchored proteins from the plasma membrane to the cell wall.
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Affiliation(s)
- Takehiko Yoko-O
- Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Mariko Umemura
- Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan.,The School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Akiko Komatsuzaki
- Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Kazutaka Ikeda
- Department of Metabolome, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Daisuke Ichikawa
- Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Kumiko Takase
- Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Noriyuki Kanzawa
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Kazunobu Saito
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Taroh Kinoshita
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Ryo Taguchi
- Department of Metabolome, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshifumi Jigami
- Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
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39
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López-Fernández L, Sanchis M, Navarro-Rodríguez P, Nicolás FE, Silva-Franco F, Guarro J, Garre V, Navarro-Mendoza MI, Pérez-Arques C, Capilla J. Understanding Mucor circinelloides pathogenesis by comparative genomics and phenotypical studies. Virulence 2018; 9:707-720. [PMID: 29436903 PMCID: PMC5955452 DOI: 10.1080/21505594.2018.1435249] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The increasing number of infections by species of Mucorales and their high mortality constitute an important concern for public health. This study aims to decipher the genetic basis of Mucor circinelloides pathogenicity, which displays virulence in a strain dependent manner. Assuming that genetic differences between strains may be linked to different pathotypes, we have conducted a study to explore genes responsible for virulence in M. circinelloides by whole genome sequencing of the avirulent strain NRRL3631 and comparison with the virulent strain CBS277.49. This genome analysis revealed 773 truncated, discontiguous and absent genes in the NRRL3631 strain. We also examined phenotypic traits resulting in reduced heat stress tolerance, chitosan content and lower susceptibility to toxic compounds (calcofluor white and sodium dodecyl sulphate) in the virulent strain, suggesting the influence of cell wall on pathogenesis. Based on these results, we focused on studying extracellular protein-coding genes by gene deletion and further pathotype characterization of mutants in murine models of pulmonary and systemic infection. Deletion of gene ID112092, which codes for a hypothetical extracellular protein of unknown function, resulted in significant reduction of virulence. Although pathogenesis is a multifactorial process, these findings highlight the crucial role of surface and secreted proteins in M. circinelloides virulence and should promote further studies of other differential genes.
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Affiliation(s)
- Loida López-Fernández
- a Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili and Institut d'Investigació Sanitària Pere Virgili (IISPV) , Reus , Spain
| | - Marta Sanchis
- a Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili and Institut d'Investigació Sanitària Pere Virgili (IISPV) , Reus , Spain
| | - Patricia Navarro-Rodríguez
- a Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili and Institut d'Investigació Sanitària Pere Virgili (IISPV) , Reus , Spain
| | - Francisco E Nicolás
- b Departamento de Genética y Microbiología , Facultad de Biología, Universidad de Murcia , Murcia , Spain
| | | | - Josep Guarro
- a Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili and Institut d'Investigació Sanitària Pere Virgili (IISPV) , Reus , Spain
| | - Victoriano Garre
- b Departamento de Genética y Microbiología , Facultad de Biología, Universidad de Murcia , Murcia , Spain
| | | | - Carlos Pérez-Arques
- b Departamento de Genética y Microbiología , Facultad de Biología, Universidad de Murcia , Murcia , Spain
| | - Javier Capilla
- a Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili and Institut d'Investigació Sanitària Pere Virgili (IISPV) , Reus , Spain
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40
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Agustinho DP, Miller LC, Li LX, Doering TL. Peeling the onion: the outer layers of Cryptococcus neoformans. Mem Inst Oswaldo Cruz 2018; 113:e180040. [PMID: 29742198 PMCID: PMC5951675 DOI: 10.1590/0074-02760180040] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 02/27/2018] [Indexed: 12/20/2022] Open
Abstract
Cryptococcus neoformans is an opportunistic fungal pathogen
that is ubiquitous in the environment. It causes a deadly meningitis that is
responsible for over 180,000 deaths worldwide each year, including 15% of all
AIDS-related deaths. The high mortality rates for this infection, even with
treatment, suggest a need for improved therapy. Unique characteristics of
C. neoformans may suggest directions for drug discovery.
These include features of three structures that surround the cell: the plasma
membrane, the cell wall around it, and the outermost polysaccharide capsule. We
review current knowledge of the fundamental biology of these fascinating
structures and highlight open questions in the field, with the goal of
stimulating further investigation that will advance basic knowledge and human
health.
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Affiliation(s)
- Daniel P Agustinho
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Liza C Miller
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Lucy X Li
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Tamara L Doering
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
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41
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Deng JJ, Huang WQ, Li ZW, Lu DL, Zhang Y, Luo XC. Biocontrol activity of recombinant aspartic protease from Trichoderma harzianum against pathogenic fungi. Enzyme Microb Technol 2018; 112:35-42. [PMID: 29499778 DOI: 10.1016/j.enzmictec.2018.02.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 02/01/2018] [Accepted: 02/02/2018] [Indexed: 12/27/2022]
Abstract
The use of cell wall degrading enzymes of Trichoderma is a promising alternative for improving food storage. The aspartic protease P6281 secreted by the fungus Trichoderma harzianum plays an important role in mycoparasitism on phytopathogenic fungi. In this study, recombinant P6281 (rP6281) expressed in Pichia pastoris showed high activity of 321.8 U/mL. Maximum activity was observed at pH 2.5 and 40 °C, and the enzyme was stable in the pH range of 2.5-6.0. rP6281 significantly inhibited spore germination and growth of plant and animal pathogenic fungi such as Botrytis cinerea, Mucor circinelloides, Aspergillus fumigatus, Aspergillus flavus, Rhizoctonia solani, and Candida albicans. Transmission electron microscopy revealed that rP6281 efficiently damages the cell wall of Botrytis cinerea. In addition, the protease significantly inhibited the development of grey mold that causes rotting of apple, orange, and cucumber, indicating that rP6281 may be developed as an effective anti-mold agent for fruit storage.
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Affiliation(s)
- Jun-Jin Deng
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong, 510006, PR China
| | - Wei-Qian Huang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong, 510006, PR China
| | - Zhi-Wei Li
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong, 510006, PR China
| | - De-Lin Lu
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong, 510006, PR China
| | - Yuanyuan Zhang
- Department of Food and Bioengineering, Guangdong Industry Technical College, Guangzhou, 510300, China
| | - Xiao-Chun Luo
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, Guangdong, 510006, PR China.
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42
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Muszewska A, Piłsyk S, Perlińska-Lenart U, Kruszewska JS. Diversity of Cell Wall Related Proteins in Human Pathogenic Fungi. J Fungi (Basel) 2017; 4:E6. [PMID: 29371499 PMCID: PMC5872309 DOI: 10.3390/jof4010006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/13/2017] [Accepted: 12/25/2017] [Indexed: 02/06/2023] Open
Abstract
The cell wall is one of the major keys to fungal identity. Fungi use their cell wall to sense the environment, and localize nutrients and competing microorganism. Pathogenic species additionally modify their cell walls to hide from a host's immune system. With the growing number of fungal infections and alarming shortage of available drugs, we are in need of new approaches to fight pathogens. The cell wall seems to be a natural target, since animal host cells are devoid of it. The current knowledge about fungal cell wall components is often limited, and there is huge diversity both in structure and composition between species. In order to compare the distribution of diverse proteins involved in cell wall biosynthesis and maintenance, we performed sequence homology searches against 24 fungal proteomes from distinct taxonomic groups, all reported as human pathogens. This approach led to identification of 4014 cell wall proteins (CWPs), and enabled us to speculate about cell wall composition in recently sequenced pathogenic fungi with limited experimental information. We found large expansions of several CWP families, in particular taxa, and a number of new CWPs possibly involved in evading host immune recognition. Here, we present a comprehensive evolutionary history of fungal CWP families in the context of the fungal tree of life.
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Affiliation(s)
- Anna Muszewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-792 Warsaw, Poland.
| | - Sebastian Piłsyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-792 Warsaw, Poland.
| | | | - Joanna S Kruszewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-792 Warsaw, Poland.
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43
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The CWI Pathway: Regulation of the Transcriptional Adaptive Response to Cell Wall Stress in Yeast. J Fungi (Basel) 2017; 4:jof4010001. [PMID: 29371494 PMCID: PMC5872304 DOI: 10.3390/jof4010001] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/11/2017] [Accepted: 12/19/2017] [Indexed: 12/14/2022] Open
Abstract
Fungi are surrounded by an essential structure, the cell wall, which not only confers cell shape but also protects cells from environmental stress. As a consequence, yeast cells growing under cell wall damage conditions elicit rescue mechanisms to provide maintenance of cellular integrity and fungal survival. Through transcriptional reprogramming, yeast modulate the expression of genes important for cell wall biogenesis and remodeling, metabolism and energy generation, morphogenesis, signal transduction and stress. The yeast cell wall integrity (CWI) pathway, which is very well conserved in other fungi, is the key pathway for the regulation of this adaptive response. In this review, we summarize the current knowledge of the yeast transcriptional program elicited to counterbalance cell wall stress situations, the role of the CWI pathway in the regulation of this program and the importance of the transcriptional input received by other pathways. Modulation of this adaptive response through the CWI pathway by positive and negative transcriptional feedbacks is also discussed. Since all these regulatory mechanisms are well conserved in pathogenic fungi, improving our knowledge about them will have an impact in the developing of new antifungal therapies.
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Wofford JD, Park J, McCormick SP, Chakrabarti M, Lindahl PA. Ferric ions accumulate in the walls of metabolically inactivating Saccharomyces cerevisiae cells and are reductively mobilized during reactivation. Metallomics 2017; 8:692-708. [PMID: 27188213 DOI: 10.1039/c6mt00070c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Mössbauer and EPR spectra of fermenting yeast cells before and after cell wall (CW) digestion revealed that CWs accumulated iron as cells transitioned from exponential to post-exponential growth. Most CW iron was mononuclear nonheme high-spin (NHHS) Fe(III), some was diamagnetic and some was superparamagnetic. A significant portion of CW Fe was removable by EDTA. Simulations using an ordinary-differential-equations-based model suggested that cells accumulate Fe as they become metabolically inactive. When dormant Fe-loaded cells were metabolically reactivated in Fe-deficient bathophenanthroline disulfonate (BPS)-treated medium, they grew using Fe that had been mobilized from their CWs AND using trace amounts of Fe in the Fe-deficient medium. When grown in Fe-deficient medium, Fe-starved cells contained the lowest cellular Fe concentrations reported for a eukaryotic cell. During metabolic reactivation of Fe-loaded dormant cells, Fe(III) ions in the CWs of these cells were mobilized by reduction to Fe(II), followed by release from the CW and reimport into the cell. BPS short-circuited this process by chelating mobilized and released Fe(II) ions before reimport; the resulting Fe(II)(BPS)3 complex adsorbed on the cell surface. NHHS Fe(II) ions appeared transiently during mobilization, suggesting that these ions were intermediates in this process. In the presence of chelators and at high pH, metabolically inactive cells leached CW Fe; this phenomenon probably differs from metabolic mobilization. The iron regulon, as reported by Fet3p levels, was not expressed during post-exponential conditions; Fet3p was maximally expressed in exponentially growing cells. Decreased expression of the iron regulon and metabolic decline combine to promote CW Fe accumulation.
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Affiliation(s)
- Joshua D Wofford
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
| | - Jinkyu Park
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
| | - Sean P McCormick
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
| | - Mrinmoy Chakrabarti
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
| | - Paul A Lindahl
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA. and Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
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Abstract
The Schizosaccharomyces pombe cell wall is a rigid exoskeletal structure mainly composed of interlinked glucose polysaccharides and galactomannoproteins. It is essential for survival of the fission yeast, as it prevents cells from bursting from internal turgor pressure and protects them from mechanical injuries. Additionally, the cell wall determines the cell shape and, therefore, a better knowledge of cell wall structure and composition could provide valuable data in S. pombe morphogenetic studies. Here, we provide information about this structure and the current reliable methods for rapid analysis of the cell wall polymers by specific enzymatic and chemical degradations of purified cell walls.
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Affiliation(s)
- Pilar Pérez
- Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas/Universidad de Salamanca, 37007 Salamanca, Spain
| | - Juan C Ribas
- Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas/Universidad de Salamanca, 37007 Salamanca, Spain
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Araújo DS, de Sousa Lima P, Baeza LC, Parente AFA, Melo Bailão A, Borges CL, de Almeida Soares CM. Employing proteomic analysis to compare Paracoccidioides lutzii yeast and mycelium cell wall proteins. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2017; 1865:1304-1314. [PMID: 28844734 DOI: 10.1016/j.bbapap.2017.08.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 08/17/2017] [Accepted: 08/21/2017] [Indexed: 12/21/2022]
Abstract
Paracoccidioidomycosis is an important systemic mycosis caused by thermodimorphic fungi of the Paracoccidioides genus. During the infective process, the cell wall acts at the interface between the fungus and the host. In this way, the cell wall has a key role in growth, environment sensing and interaction, as well as morphogenesis of the fungus. Since the cell wall is absent in mammals, it may present molecules that are described as target sites for new antifungal drugs. Despite its importance, up to now few studies have been conducted employing proteomics in for the identification of cell wall proteins in Paracoccidioides spp. Here, a detailed proteomic approach, including cell wall-fractionation coupled to NanoUPLC-MSE, was used to study and compare the cell wall fractions from Paracoccidioides lutzii mycelia and yeast cells. The analyzed samples consisted of cell wall proteins extracted by hot SDS followed by extraction by mild alkali. In summary, 512 proteins constituting different cell wall fractions were identified, including 7 predicted GPI-dependent cell wall proteins that are potentially involved in cell wall metabolism. Adhesins previously described in Paracoccidioides spp. such as enolase, glyceraldehyde-3-phosphate dehydrogenase were identified. Comparing the proteins in mycelium and yeast cells, we detected some that are common to both fungal phases, such as Ecm33, and some specific proteins, as glucanase Crf1. All of those proteins were described in the metabolism of cell wall. Our study provides an important elucidation of cell wall composition of fractions in Paracoccidioides, opening a way to understand the fungus cell wall architecture.
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Affiliation(s)
- Danielle Silva Araújo
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, ICB II, Campus II, Universidade Federal de Goiás, 74001-970 Goiânia, Goiás, Brazil
| | - Patrícia de Sousa Lima
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, ICB II, Campus II, Universidade Federal de Goiás, 74001-970 Goiânia, Goiás, Brazil; Laboratório Interdisciplinar de Biologia, Universidade Estadual de Goiás, Itapuranga, Goiás, Brazil
| | - Lilian Cristiane Baeza
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, ICB II, Campus II, Universidade Federal de Goiás, 74001-970 Goiânia, Goiás, Brazil
| | - Ana Flávia Alves Parente
- Laboratório de Bioquímica e Química de Proteínas, Instituto de Biologia, Campus Universitário Darci Ribeiro, Brasília, DF, Brazil
| | - Alexandre Melo Bailão
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, ICB II, Campus II, Universidade Federal de Goiás, 74001-970 Goiânia, Goiás, Brazil
| | - Clayton Luiz Borges
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, ICB II, Campus II, Universidade Federal de Goiás, 74001-970 Goiânia, Goiás, Brazil
| | - Célia Maria de Almeida Soares
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, ICB II, Campus II, Universidade Federal de Goiás, 74001-970 Goiânia, Goiás, Brazil.
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Myers RR, Smith TD, Elsawa SF, Puel O, Tadrist S, Calvo AM. rtfA controls development, secondary metabolism, and virulence in Aspergillus fumigatus. PLoS One 2017; 12:e0176702. [PMID: 28453536 PMCID: PMC5409149 DOI: 10.1371/journal.pone.0176702] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/14/2017] [Indexed: 12/18/2022] Open
Abstract
Invasive aspergillosis by Aspergillus fumigatus is a leading cause of infection-related mortality in immune-compromised patients. In order to discover potential genetic targets to control A. fumigatus infections we characterized rtfA, a gene encoding a putative RNA polymerase II transcription elongation factor-like protein. Our recent work has shown that the rtfA ortholog in the model fungus Aspergillus nidulans regulates morphogenesis and secondary metabolism. The present study on the opportunistic pathogen A. fumigatus rtfA gene revealed that this gene influences fungal growth and conidiation, as well as production of the secondary metabolites tryptoquivaline F, pseurotin A, fumiquinazoline C, festuclavine, and fumigaclavines A, B and C. Additionally, rtfA influences protease activity levels, the sensitivity to oxidative stress and adhesion capacity, all factors important in pathogenicity. Furthermore, rtfA was shown to be indispensable for normal virulence using Galleria mellonella as well as murine infection model systems.
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Affiliation(s)
- Ryan R. Myers
- Department of Biological Sciences, Northern Illinois University, Dekalb, Illinois, United States of America
| | - Timothy D. Smith
- Department of Biological Sciences, Northern Illinois University, Dekalb, Illinois, United States of America
| | - Sherine F. Elsawa
- Department of Biological Sciences, Northern Illinois University, Dekalb, Illinois, United States of America
| | - Olivier Puel
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Souraia Tadrist
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Ana M. Calvo
- Department of Biological Sciences, Northern Illinois University, Dekalb, Illinois, United States of America
- * E-mail:
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48
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Ao J, Free SJ. Genetic and biochemical characterization of the GH72 family of cell wall transglycosylases in Neurospora crassa. Fungal Genet Biol 2017; 101:46-54. [PMID: 28285007 DOI: 10.1016/j.fgb.2017.03.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 02/20/2017] [Accepted: 03/07/2017] [Indexed: 11/18/2022]
Abstract
The Neurospora crassa genome encodes five GH72 family transglycosylases, and four of these enzymes (GEL-1, GEL-2, GEL-3 and GEL-5) have been found to be present in the cell wall proteome. We carried out an extensive genetic analysis on the role of these four transglycosylases in cell wall biogenesis and demonstrated that the transglycosylases are required for the formation of a normal cell wall. As suggested by the proteomic analysis, we found that multiple transglycosylases were being expressed in N. crassa cells and that different combinations of the enzymes are required in different cell types. The combination of GEL-1, GEL-2 and GEL-5 is required for the growth of vegetative hyphae, while the GEL-1, GEL-2, GEL-3 combination is needed for the production of aerial hyphae and conidia. Our data demonstrates that the enzymes are redundant with partially overlapping enzymatic activities, which provides the fungus with a robust cell wall biosynthetic system. Characterization of the transglycosylase-deficient mutants demonstrated that the incorporation of cell wall proteins was severely compromised. Interestingly, we found that the transglycosylase-deficient mutant cell walls contained more β-1,3-glucan than the wild type cell wall. Our results demonstrate that the GH72 transglycosylases are not needed for the incorporation of β-1,3-glucan into the cell wall, but they are required for the incorporation of cell wall glycoprotein into the cell wall.
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Affiliation(s)
- Jie Ao
- Department of Biological Sciences, SUNY University at Buffalo, Buffalo, NY 14260, United States
| | - Stephen J Free
- Department of Biological Sciences, SUNY University at Buffalo, Buffalo, NY 14260, United States.
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49
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Ma L, Salas O, Bowler K, Oren‐Young L, Bar‐Peled M, Sharon A. Genetic alteration of UDP-rhamnose metabolism in Botrytis cinerea leads to the accumulation of UDP-KDG that adversely affects development and pathogenicity. MOLECULAR PLANT PATHOLOGY 2017; 18:263-275. [PMID: 26991954 PMCID: PMC6638282 DOI: 10.1111/mpp.12398] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/11/2016] [Accepted: 03/11/2016] [Indexed: 05/19/2023]
Abstract
Botrytis cinerea is a model plant-pathogenic fungus that causes grey mould and rot diseases in a wide range of agriculturally important crops. A previous study has identified two enzymes and corresponding genes (bcdh, bcer) that are involved in the biochemical transformation of uridine diphosphate (UDP)-glucose, the major fungal wall nucleotide sugar precursor, to UDP-rhamnose. We report here that deletion of bcdh, the first biosynthetic gene in the metabolic pathway, or of bcer, the second gene in the pathway, abolishes the production of rhamnose-containing glycans in these mutant strains. Deletion of bcdh or double deletion of both bcdh and bcer has no apparent effect on fungal development or pathogenicity. Interestingly, deletion of the bcer gene alone adversely affects fungal development, giving rise to altered hyphal growth and morphology, as well as reduced sporulation, sclerotia production and virulence. Treatments with wall stressors suggest the alteration of cell wall integrity. Analysis of nucleotide sugars reveals the accumulation of the UDP-rhamnose pathway intermediate UDP-4-keto-6-deoxy-glucose (UDP-KDG) in hyphae of the Δbcer strain. UDP-KDG could not be detected in hyphae of the wild-type strain, indicating fast conversion to UDP-rhamnose by the BcEr enzyme. The correlation between high UDP-KDG and modified cell wall and developmental defects raises the possibility that high levels of UDP-KDG result in deleterious effects on cell wall composition, and hence on virulence. This is the first report demonstrating that the accumulation of a minor nucleotide sugar intermediate has such a profound and adverse effect on a fungus. The ability to identify molecules that inhibit Er (also known as NRS/ER) enzymes or mimic UDP-KDG may lead to the development of new antifungal drugs.
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Affiliation(s)
- Liang Ma
- Department of Molecular Biology and Ecology of PlantsTel Aviv UniversityTel Aviv69978Israel
| | - Omar Salas
- Complex Carbohydrate Research Center, University of GeorgiaAthensGA30602USA
| | - Kyle Bowler
- Complex Carbohydrate Research Center, University of GeorgiaAthensGA30602USA
| | - Liat Oren‐Young
- Department of Molecular Biology and Ecology of PlantsTel Aviv UniversityTel Aviv69978Israel
| | - Maor Bar‐Peled
- Complex Carbohydrate Research Center, University of GeorgiaAthensGA30602USA
- Department of Plant BiologyUniversity of GeorgiaAthensGA30602USA
| | - Amir Sharon
- Department of Molecular Biology and Ecology of PlantsTel Aviv UniversityTel Aviv69978Israel
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50
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Hill TW, Loprete DM, Momany M, Ha Y, Harsch LM, Livesay JA, Mirchandani A, Murdock JJ, Vaughan MJ, Watt MB. Isolation of cell wall mutants inAspergillus nidulansby screening for hypersensitivity to Calcofluor White. Mycologia 2017. [DOI: 10.1080/15572536.2006.11832675] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Terry W. Hill
- Department of Biology, Rhodes College, Memphis, Tennessee 38112
| | | | | | - Youngsil Ha
- Department of Plant Biology, The University of Georgia, Athens, Georgia 30602
| | | | | | | | | | | | - Mridula B. Watt
- Departments of Biology and Chemistry, Rhodes College, Memphis, Tennessee 38112
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