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Leconte A, Jacquin J, Duban M, Deweer C, Trapet P, Laruelle F, Farce A, Compère P, Sahmer K, Fiévet V, Hoste A, Siah A, Lounès-Hadj Sahraoui A, Jacques P, Coutte F, Deleu M, Muchembled J. Deciphering the mechanisms involved in reduced sensitivity to azoles and fengycin lipopeptide in Venturia inaequalis. Microbiol Res 2024; 286:127816. [PMID: 38964072 DOI: 10.1016/j.micres.2024.127816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/06/2024] [Accepted: 06/20/2024] [Indexed: 07/06/2024]
Abstract
Apple scab, caused by the hemibiotrophic fungus Venturia inaequalis, is currently the most common and damaging disease in apple orchards. Two strains of V. inaequalis (S755 and Rs552) with different sensitivities to azole fungicides and the bacterial metabolite fengycin were compared to determine the mechanisms responsible for these differences. Antifungal activity tests showed that Rs552 had reduced sensitivity to tebuconazole and tetraconazole, as well as to fengycin alone or in a binary mixture with other lipopeptides (iturin A, pumilacidin, lichenysin). S755 was highly sensitive to fengycin, whose activity was close to that of tebuconazole. Unlike fengycin, lipopeptides from the iturin family (mycosubtilin, iturin A) had similar activity on both strains, while those from the surfactin family (lichenysin, pumilacidin) were not active, except in binary mixtures with fengycin. The activity of lipopeptides varies according to their family and structure. Analyses to determine the difference in sensitivity to azoles (which target the CYP51 enzyme involved in the ergosterol biosynthesis pathway) showed that the reduced sensitivity in Rs552 is linked to (i) a constitutive increased expression of the Cyp51A gene caused by insertions in the upstream region and (ii) greater efflux by membrane pumps with the involvement of ABC transporters. Microscopic observations revealed that fengycin, known to interact with plasma membranes, induced morphological and cytological changes in cells from both strains. Sterol and phospholipid analyses showed a higher level of ergosta-7,22-dien-3-ol and a lower level of PI(C16:0/C18:1) in Rs552 compared with S755. These differences could therefore influence the composition of the plasma membrane and explain the differential sensitivity of the strains to fengycin. However, the similar antifungal activities of mycosubtilin and iturin A in the two strains indirectly indicate that sterols are probably not involved in the fengycin resistance mechanism. This leads to the conclusion that different mechanisms are responsible for the difference in susceptibility to azoles or fengycin in the strains studied.
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Affiliation(s)
- Aline Leconte
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France; University of Lille, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, Charles Viollette Institute, Lille F-59000, France; University of Liège, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, Gembloux B-5030, Belgium
| | - Justine Jacquin
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France
| | - Matthieu Duban
- University of Lille, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, Charles Viollette Institute, Lille F-59000, France
| | - Caroline Deweer
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France
| | - Pauline Trapet
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France
| | - Frédéric Laruelle
- Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d'Opale, CEDEX CS 80699, Calais 62228, France
| | - Amaury Farce
- Université Lille, Inserm, CHU Lille, U1286 - INFINITE - Institut de recherche translationnelle sur l'inflammation, Lille F-59000, France
| | - Philippe Compère
- Laboratoire de morphologie fonctionnelle et évolutive, UR FOCUS, and Centre de recherche appliquée et d'enseignement en microscopie (CAREM), Université de Liège, Liège, Belgium
| | - Karin Sahmer
- Université Lille, IMT Lille Douai, Univ. Artois, JUNIA, ULR 4515 - LGCgE, Laboratoire de Génie Civil et geo-Environnement, Lille F-59000, France
| | - Valentin Fiévet
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France
| | - Alexis Hoste
- University of Liège, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, Gembloux B-5030, Belgium
| | - Ali Siah
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France
| | - Anissa Lounès-Hadj Sahraoui
- Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d'Opale, CEDEX CS 80699, Calais 62228, France
| | - Philippe Jacques
- University of Liège, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, Gembloux B-5030, Belgium
| | - François Coutte
- University of Lille, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, Charles Viollette Institute, Lille F-59000, France
| | - Magali Deleu
- University of Liège, UMRt BioEcoAgro 1158-INRAE, Microbial Secondary Metabolites team, TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, Gembloux B-5030, Belgium
| | - Jérôme Muchembled
- JUNIA, UMRt BioEcoAgro 1158-INRAE, Plant Secondary Metabolites Team, Charles Viollette Institute, Lille F-59000, France.
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Wang C, Fan Y, Wang C, Tang J, Qiu Y, Xu K, Ding Y, Liu Y, Ying Y, Wang H. Discovery of Prenyltransferase-Guided Hydroxyphenylacetic Acid Derivatives from Marine Fungus Penicillium sp. W21C371. Mar Drugs 2024; 22:296. [PMID: 39057405 PMCID: PMC11278016 DOI: 10.3390/md22070296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/28/2024] Open
Abstract
Traditional isolation methods often lead to the rediscovery of known natural products. In contrast, genome mining strategies are considered effective for the continual discovery of new natural products. In this study, we discovered a unique prenyltransferase (PT) through genome mining, capable of catalyzing the transfer of a prenyl group to an aromatic nucleus to form C-C or C-O bonds. A pair of new hydroxyphenylacetic acid derivative enantiomers with prenyl units, (±)-peniprenydiol A (1), along with 16 known compounds (2-17), were isolated from a marine fungus, Penicillium sp. W21C371. The separation of 1 using chiral HPLC led to the isolation of the enantiomers 1a and 1b. Their structures were established on the basis of extensive spectroscopic analysis, including 1D, 2D NMR and HRESIMS. The absolute configurations of the new compounds were determined by a modified Mosher method. A plausible biosynthetic pathway for 1 was deduced, facilitated by PT catalysis. In the in vitro assay, 2 and 3 showed promising inhibitory activity against Escherichia coli β-glucuronidase (EcGUS), with IC50 values of 44.60 ± 0.84 μM and 21.60 ± 0.76 μM, respectively, compared to the positive control, D-saccharic acid 1,4-lactone hydrate (DSL). This study demonstrates the advantages of genome mining in the rational acquisition of new natural products.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Youmin Ying
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China; (C.W.); (Y.F.); (C.W.); (J.T.); (Y.Q.); (K.X.); (Y.D.); (Y.L.)
| | - Hong Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China; (C.W.); (Y.F.); (C.W.); (J.T.); (Y.Q.); (K.X.); (Y.D.); (Y.L.)
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Hussain S, Tai B, Ali M, Jahan I, Sakina S, Wang G, Zhang X, Yin Y, Xing F. Antifungal potential of lipopeptides produced by the Bacillus siamensis Sh420 strain against Fusarium graminearum. Microbiol Spectr 2024; 12:e0400823. [PMID: 38451229 PMCID: PMC10986469 DOI: 10.1128/spectrum.04008-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/20/2024] [Indexed: 03/08/2024] Open
Abstract
Biological control is a more sustainable and environmentally friendly alternative to chemical fungicides for controlling Fusarium spp. infestations. In this work, Bacillus siamensis Sh420 isolated from wheat rhizosphere showed a high antifungal activity against Fusarium graminearum as a secure substitute for fungicides. Sh420 was identified as B. siamensis using phenotypic evaluation and 16S rDNA gene sequence analysis. An in vitro antagonistic study showed that Sh420's lipopeptide (LP) extract exhibited strong antifungal properties and effectively combated F. graminearum. Meanwhile, lipopeptides have the ability to decrease ergosterol content, which has an impact on the overall structure and stability of the plasma membrane. The PCR-based screening revealed the presence of antifungal LP biosynthetic genes in this strain's genomic DNA. In the crude LP extract of Sh420, we were able to discover several LPs such as bacillomycin, iturins, fengycin, and surfactins using ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry. Microscopic investigations (fluorescent/transmission electron microscopy) revealed deformities and alterations in the morphology of the phytopathogen upon interaction with LPs. Sh420 LPs have been shown in grape tests to be effective against F. graminearum infection and to stimulate antioxidant activity in fruits by avoiding rust and gray lesions. The overall findings of this study highlight the potential of Sh420 lipopeptides as an effective biological control agent against F. graminearum infestations.IMPORTANCEThis study addresses the potential of lipopeptide (LP) extracts obtained from the strain identified as Bacillus siamensis Sh420. This Sh420 isolate acts as a crucial player in providing a sustainable and environmentally friendly alternative to chemical fungicides for suppressing Fusarium graminearum phytopathogen. Moreover, these LPs can reduce ergosterol content in the phytopathogen influencing the overall structure and stability of its plasma membrane. PCR screening provided confirmation regarding the existence of genes responsible for biosynthesizing antifungal LPs in the genomic DNA of Sh420. Several antibiotic lipopeptide compounds were identified from this bacterial crude extract using ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry. Microscopic investigations revealed deformities and alterations in the morphology of F. graminearum upon interaction with LPs. Furthermore, studies on fruit demonstrated the efficacy of Sh420 LPs in mitigating F. graminearum infection and stimulating antioxidant activity in fruits, preventing rust and gray lesions.
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Affiliation(s)
- Sarfaraz Hussain
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong, China
| | - Bowen Tai
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Maratab Ali
- College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong, China
| | - Israt Jahan
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Suha Sakina
- Department of Agriculture and Food Technology, Karakoram International University, Gilgit-Baltistan, Pakistan
| | - Gang Wang
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xinlong Zhang
- Shandong Xinfurui Agriculture Science Co., Ltd, Liaocheng, Shandong, China
| | - Yixuan Yin
- Shandong Xinfurui Agriculture Science Co., Ltd, Liaocheng, Shandong, China
| | - Fuguo Xing
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
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Yang Y, Hou J, Luan J. Resistance mechanisms of Saccharomyces cerevisiae against silver nanoparticles with different sizes and coatings. Food Chem Toxicol 2024; 186:114581. [PMID: 38460669 DOI: 10.1016/j.fct.2024.114581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 01/15/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
To investigate the underlying resistance mechanisms of Saccharomyces cerevisiae against Ag-NPs with different particle sizes and coatings, transcriptome sequencing (RNA-seq) technology was used to characterize the transcriptomes from S. cerevisiae exposed to 20-PVP-Ag, 100-PVP-Ag, 20-CIT-Ag and 100-CIT-Ag, respectively. The steroid biosynthesis was found as a general pathway for Ag-NPs stress responding, in which ERG6 and ERG3 were inhibited and ERG11, ERG25 and ERG5 were significantly up-regulated to resist the stress by supporting the later mutation and resistance and modulate drug efflux indirectly. The resistance mechanism of S. cerevisiae to 20-PVP-Ag seems different from that of 100-PVP-Ag, 20-CIT-Ag and 100-CIT-Ag. Under the 20-PVP-Ag, transmembrane transporter activity, transition metal ion homeostasis and oxidative phosphorylation pathway were main resistance pathways to enhance cell transport processes. While 100-PVP-Ag, 20-CIT-Ag and 100-CIT-Ag mainly impacted RNA binding, structural constituent of ribosome and ribosome pathway which can provide more energy to maintain the number and function of protein in cells. This study reveals the differences in resistance mechanisms of S. cerevisiae to Ag-NPs with different particle sizes and coatings, and explains several main regulatory mechanisms used to respond to silver stress. It will provide theoretical basis for the study of chemical risk assessment.
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Affiliation(s)
- Yue Yang
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Jing Hou
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
| | - Jian Luan
- College of Life Sciences, Jilin Normal University, Jilin, 136000, PR China
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Regulated synthesis and metabolism of Monascus pigments in a unique environment. World J Microbiol Biotechnol 2023; 39:46. [DOI: 10.1007/s11274-022-03486-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 12/03/2022] [Indexed: 12/23/2022]
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Huang Z, Hu T, Yang S, Tian X, Wu Z. Genetic responses to adding nitrates to improve hydrophilic yellow pigment in Monascus fermentation. Appl Microbiol Biotechnol 2023; 107:1341-1359. [PMID: 36705673 DOI: 10.1007/s00253-023-12392-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/12/2023] [Accepted: 01/15/2023] [Indexed: 01/28/2023]
Abstract
Nitrates can stimulate the biosynthesis of hydrophilic yellow pigments (HYPs) in Monascus ruber CGMCC 10910. To explore the molecular mechanisms whereby nitrates (NaNO3 and NH4NO3) regulate HYP production, an integrated transcriptomic and proteomic analysis was conducted in this study. Nitrate addition led to an approximately 75% higher HYP production compared with the untreated group, especially compounds Y3 and Y4. Comparative transcriptomic analysis found that mpigsA, H, K, L, and P genes involved in yellow pigment biosynthesis were significantly upregulated. In addition, pigment biosynthesis-related (carbon catabolism, amino acid metabolism, polyketide synthesis, and fatty acid metabolism) genes were upregulated to provide precursors and energy for HYP biosynthesis and cell growth. Secretion-related (cytomembrane ergosterol biosynthetic, and transport) pathways were also noticeably regulated to accelerate transmembrane transport of HYPs. Meanwhile, proteomic analysis showed that nitrates improved the protein expression of hybrid polyketide synthase-nonribosomal peptide synthetase, oxidoreductase, glucoamylase, endo-1,4-beta-xylanase, O-acetylhomoserine, and isocitrate lyase to enhance HYP production. These findings demonstrated the regulatory mechanism of nitrates for enhancing HYP production in Monascus. KEY POINTS: • Nitrates stimulated the biosynthesis of Monascus hydrophilic yellow pigments (HYPs) • Nitrates affected transcriptional level of pigment biosynthesis- and transport genes • Increased expression of hybrid PKS-NRPS and transporters promoted production of HYPs.
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Affiliation(s)
- Zhenfeng Huang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Tingting Hu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.,Pan Asia (Jiangmen) Institute of Biological Engineering and Health, Jiangmen, 529080, People's Republic of China
| | - Shanzhong Yang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Xiaofei Tian
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, Guangzhou, 510006, China
| | - Zhenqiang Wu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.
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Rodríguez-Moraga N, Ramos-Martín F, Buchoux S, Rippa S, D'Amelio N, Sarazin C. The effect of rhamnolipids on fungal membrane models as described by their interactions with phospholipids and sterols: An in silico study. Front Chem 2023; 11:1124129. [PMID: 36895318 PMCID: PMC9989204 DOI: 10.3389/fchem.2023.1124129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/06/2023] [Indexed: 02/23/2023] Open
Abstract
Introduction: Rhamnolipids (RLs) are secondary metabolites naturally produced by bacteria of the genera Pseudomonas and Burkholderia with biosurfactant properties. A specific interest raised from their potential as biocontrol agents for crop culture protection in regard to direct antifungal and elicitor activities. As for other amphiphilic compounds, a direct interaction with membrane lipids has been suggested as the key feature for the perception and subsequent activity of RLs. Methods: Molecular Dynamics (MD) simulations are used in this work to provide an atomistic description of their interactions with different membranous lipids and focusing on their antifungal properties. Results and discussion: Our results suggest the insertion of RLs into the modelled bilayers just below the plane drawn by lipid phosphate groups, a placement that is effective in promoting significant membrane fluidification of the hydrophobic core. This localization is promoted by the formation of ionic bonds between the carboxylate group of RLs and the amino group of the phosphatidylethanolamine (PE) or phosphatidylserine (PS) headgroups. Moreover, RL acyl chains adhere to the ergosterol structure, forming a significantly higher number of van der Waals contact with respect to what is observed for phospholipid acyl chains. All these interactions might be essential for the membranotropic-driven biological actions of RLs.
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Affiliation(s)
- Nely Rodríguez-Moraga
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens, France
| | - Francisco Ramos-Martín
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens, France
| | - Sébastien Buchoux
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens, France
| | - Sonia Rippa
- Unité de Génie Enzymatique et Cellulaire, CNRS UMR 7025, Sorbonne Universités, Université de Technologie de Compiègne, Compiègne, France
| | - Nicola D'Amelio
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens, France
| | - Catherine Sarazin
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens, France
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Botcazon C, Bergia T, Lecouturier D, Dupuis C, Rochex A, Acket S, Nicot P, Leclère V, Sarazin C, Rippa S. Rhamnolipids and fengycins, very promising amphiphilic antifungal compounds from bacteria secretomes, act on Sclerotiniaceae fungi through different mechanisms. Front Microbiol 2022; 13:977633. [PMID: 36246282 PMCID: PMC9557291 DOI: 10.3389/fmicb.2022.977633] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 09/12/2022] [Indexed: 11/13/2022] Open
Abstract
Rhamnolipids (RLs) and fengycins (FGs) are amphiphilic lipid compounds from bacteria secretomes proposed to replace synthetic pesticides for crop protection. They both display plant defense triggering properties and direct antimicrobial activities. In particular, they have well reported antifungal effects against phytopathogenic fungi. RLs and FGs are considered to act through a direct interaction with membrane lipids and a destabilization of microorganism plasma membrane, thereby limiting the risk of resistance emergence. The main objective of this work was to gain insights in the antimycelial mode of action of these metabolites to promote them as environment and human health friendly biocontrol solutions. Their biocidal effects were studied on two Sclerotiniaceae fungi responsible for diseases in numerous plant species worldwide. We show here that different strains of Botrytis cinerea and Sclerotinia sclerotiorum have opposite sensitivities to RLs and FGs on plate experiments. Overall, B. cinerea is more sensitive to FGs while S. sclerotiorum is more sensitive to RLs. Electron microscopy observations demonstrated that RLs induce mycelial destructuring by asperities emergence and hyphal fusions whereas FGs promote swelling and formation of vesicle-like structures due to vacuole fusions and autophagy. Permeability studies, phosphatidylserine externalization and reactive oxygen species production assessments showed a programmed cell death triggering by RLs at medium concentrations (until 50 μg mL−1) and necrosis characteristics at higher concentration. Programmed cell death was always observed on hyphae treated with FGs. Quantifications of mycelial ergosterol content indicated that a higher ergosterol rate in S. sclerotiorum correlates with increasing sensitivity to RLs. Oppositely, a lower ergosterol rate in B. cinerea correlates with increasing sensitivity to FGs, which was confirmed by ergosterol biosynthesis inhibition with tebuconazole. This gain of knowledge will help to better understand the mode of action of RLs and FGs to fight specific plant fungal diseases.
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Affiliation(s)
- Camille Botcazon
- Unité de Génie Enzymatique et Cellulaire, CNRS UMR 7025, Sorbonne Universités, Université de Technologie de Compiègne, Compiègne, France
| | - Thomas Bergia
- Unité de Génie Enzymatique et Cellulaire, CNRS UMR 7025, Sorbonne Universités, Université de Technologie de Compiègne, Compiègne, France
| | - Didier Lecouturier
- Charles Viollette Institute, UMRt BioEcoAgro 1158-INRAe, Métabolites Secondaires d’Origine Microbienne, Université de Lille, Université de Liège, Lille, France
| | - Chloé Dupuis
- Charles Viollette Institute, UMRt BioEcoAgro 1158-INRAe, Métabolites Secondaires d’Origine Microbienne, Université de Lille, Université de Liège, Lille, France
| | - Alice Rochex
- Charles Viollette Institute, UMRt BioEcoAgro 1158-INRAe, Métabolites Secondaires d’Origine Microbienne, Université de Lille, Université de Liège, Lille, France
| | - Sébastien Acket
- Unité de Génie Enzymatique et Cellulaire, CNRS UMR 7025, Sorbonne Universités, Université de Technologie de Compiègne, Compiègne, France
| | - Philippe Nicot
- Centre de Recherche PACA, Domaine Saint Maurice, Unité de Pathologie Végétale, INRAe, Avignon, France
| | - Valérie Leclère
- Charles Viollette Institute, UMRt BioEcoAgro 1158-INRAe, Métabolites Secondaires d’Origine Microbienne, Université de Lille, Université de Liège, Lille, France
| | - Catherine Sarazin
- Unité de Génie Enzymatique et Cellulaire, CNRS UMR 7025, Université de Picardie Jules Verne, Amiens, France
| | - Sonia Rippa
- Unité de Génie Enzymatique et Cellulaire, CNRS UMR 7025, Sorbonne Universités, Université de Technologie de Compiègne, Compiègne, France
- *Correspondence: Sonia Rippa,
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Girardi-Piva G, Casalta E, Legras JL, Nidelet T, Pradal M, Macna F, Ferreira D, Ortiz-Julien A, Tesnière C, Galeote V, Mouret JR. Influence of ergosterol and phytosterols on wine alcoholic fermentation with Saccharomyces cerevisiae strains. Front Microbiol 2022; 13:966245. [PMID: 36160262 PMCID: PMC9493300 DOI: 10.3389/fmicb.2022.966245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/08/2022] [Indexed: 11/20/2022] Open
Abstract
Sterols are a fraction of the eukaryotic lipidome that is essential for the maintenance of cell membrane integrity and its good functionality. During alcoholic fermentation, they enhance yeast growth, metabolism and viability, as well as resistance to high sugar content and ethanol stress. Grape musts clarified in excess lead to the loss of solid particles rich in sterols, resulting in sluggish and stuck fermentations. Two sterol sources can help Saccharomyces cerevisiae yeasts to adapt to fermentation stress conditions: ergosterol (synthesized by yeast under aerobic conditions) and phytosterols (plant sterols imported by yeast cells from grape musts under anaerobiosis). Little is known about the physiological impact of phytosterols assimilation in comparison with ergosterol and the influence of sterol type on fermentation kinetics parameters. Moreover, studies to date have analyzed a limited number of yeast strains. Thus, the aim of this work was to compare the performances of a set of Saccharomyces cerevisiae wine strains that represent the diversity of industrial wine yeast, fermenting with phytosterols or ergosterol under two conditions: sterol limitation (sterol starvation) and high sugar content (the most common stress during fermentation). Results indicated that yeast cell viability was negatively impacted by both stressful conditions, resulting in sluggish and stuck fermentations. This study revealed the huge phenotype diversity of the S. cerevisiae strains tested, in particular in terms of cell viability. Indeed, strains with better viability maintenance completed fermentation earlier. Interestingly, we showed for the first time that sterol type differently affects a wide variety of phenotype, such as viability, biomass, fermentation kinetics parameters and biosynthesis of carbon central metabolism (CCM) metabolites. Ergosterol allowed preserving more viable cells at the end of fermentation and, as a consequence, a better completion of fermentation in both conditions tested, even if phytosterols also enabled the completion of alcoholic fermentation for almost all strains. These results highlighted the essential role of sterols during wine alcoholic fermentation to ensure yeast growth and avoid sluggish or stuck fermentations. Finally, this study emphasizes the importance of taking into account sterol types available during wine fermentation.
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Affiliation(s)
| | - Erick Casalta
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | - Jean-Luc Legras
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | - Thibault Nidelet
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | - Martine Pradal
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | - Faïza Macna
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | | | | | - Catherine Tesnière
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | - Virginie Galeote
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
| | - Jean-Roch Mouret
- SPO, Univ Montpellier, INRAE, Institut Agro Montpellier, Montpellier, France
- *Correspondence: Jean-Roch Mouret,
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10
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Aguiar TKB, Neto NAS, Freitas CDT, Silva AFB, Bezerra LP, Malveira EA, Branco LAC, Mesquita FP, Goldman GH, Alencar LMR, Oliveira JTA, Santos-Oliveira R, Souza PFN. Antifungal Potential of Synthetic Peptides against Cryptococcus neoformans: Mechanism of Action Studies Reveal Synthetic Peptides Induce Membrane-Pore Formation, DNA Degradation, and Apoptosis. Pharmaceutics 2022; 14:pharmaceutics14081678. [PMID: 36015304 PMCID: PMC9416200 DOI: 10.3390/pharmaceutics14081678] [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: 07/15/2022] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 12/02/2022] Open
Abstract
Cryptococcus neoformans is a human-pathogenic yeast responsible for pneumonia and meningitis, mainly in patients immunocompromised. Infections caused by C. neoformans are a global health concern. Synthetic antimicrobial peptides (SAMPs) have emerged as alternative molecules to cope with fungal infections, including C. neoformans. Here, eight SAMPs were tested regarding their antifungal potential against C. neoformans and had their mechanisms of action elucidated by fluorescence and scanning electron microscopies. Five SAMPs showed an inhibitory effect (MIC50) on C. neoformans growth at low concentrations. Fluorescence microscope (FM) revealed that SAMPs induced 6-kDa pores in the C. neoformans membrane. Inhibitory assays in the presence of ergosterol revealed that some peptides lost their activity, suggesting interaction with it. Furthermore, FM analysis revealed that SAMPs induced caspase 3/7-mediated apoptosis and DNA degradation in C. neoformans cells. Scanning Electron Microscopy (SEM) analysis revealed that peptides induced many morphological alterations such as cell membrane, wall damage, and loss of internal content on C. neoformans cells. Our results strongly suggest synthetic peptides are potential alternative molecules to control C. neoformans growth and treat the cryptococcal infection.
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Affiliation(s)
- Tawanny K. B. Aguiar
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Nilton A. S. Neto
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Cleverson D. T. Freitas
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Ayrles F. B. Silva
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Leandro P. Bezerra
- Department of Fisheries Engineering, Federal University of Ceará, Fortaleza 60455-970, CE, Brazil
| | - Ellen A. Malveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Levi A. C. Branco
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Felipe P. Mesquita
- Drug Research and Development Center, Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza 60430-275, CE, Brazil
| | - Gustavo H. Goldman
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, São Paulo 14040-903, SP, Brazil
| | - Luciana M. R. Alencar
- Department of Physics, Laboratory of Biophysics and Nanosystems, Federal University of Maranhão, São Luís 65080-805, MA, Brazil
| | - Jose T. A. Oliveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Ralph Santos-Oliveira
- Laboratory of Nanoradiopharmaceuticals and Radiopharmacy, Zona Oeste State University, Rio de Janeiro 23070-200, RJ, Brazil
- Brazilian Nuclear Energy Commission, Nuclear Engineering Institute, Rio de Janeiro 21941-906, RJ, Brazil
| | - Pedro F. N. Souza
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
- Drug Research and Development Center, Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza 60430-275, CE, Brazil
- Correspondence:
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11
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Effect of arginine supplementation on Monacolin K yield of Monascus purpureus. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2021.104252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Characterization and Role of Sterols in Saccharomyces cerevisiae during White Wine Alcoholic Fermentation. FERMENTATION 2022. [DOI: 10.3390/fermentation8020090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Responsible for plasma membrane structure maintenance in eukaryotic organisms, sterols are essential for yeast development. The role of two sterol sources in Saccharomyces cerevisiae during wine fermentation is highlighted in this review: ergosterol (yeast sterol produced by yeast cells under aerobic conditions) and phytosterols (plant sterols imported by yeast cells from grape musts in the absence of oxygen). These compounds are responsible for the maintenance of yeast cell viability during white wine fermentation under stress conditions, such as ethanol stress and sterol starvation, to avoid sluggish and stuck fermentations.
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13
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Pandey B, Tyagi C, Prajapati GK, Mishra AK, Hashem A, Alqarawi AA, Abd_Allah EF, Mohanta TK. Analysis of mutations of defensin protein using accelerated molecular dynamics simulations. PLoS One 2020; 15:e0241679. [PMID: 33253167 PMCID: PMC7703945 DOI: 10.1371/journal.pone.0241679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/19/2020] [Indexed: 11/18/2022] Open
Abstract
Plant defensins possess diverse biological functions that include antifungal and antibacterial activities and α-amylase and trypsin inhibitory properties. Two mutations, G9R and V39R, were confirmed to increase the antifungal activity of Raphanus sativus antifungal protein 2 (RsAFP2). Accelerated Molecular Dynamics (aMD) were carried out to examine the conformational changes present in these RsAFP2 mutants, and its two closest homologs compared to the wild-type protein. Specifically, the root mean square fluctuation values for the eight cysteine amino acids involved in the four disulfide bonds were low in the V39R mutant compared to the wild-type. Additionally, analysis of the free energy change revealed that G9R and V39R mutations exert a neutral and stabilizing effect on RsAFP2 conformation, and this is supported by the observed lower total energy of mutants compared to the wild-type, suggesting that enhanced stability of the mutants. However, MD simulations to a longer time scale would aid in capturing more conformational state of the wild-type and mutants defensin protein. Furthermore, the aMD simulations on fungal mimic membranes with RsAFP2 and its mutants and homologs showed that the mutant proteins caused higher deformation and water diffusion than the native RsAFP2, especially the V39R mutant. The mutant variants seem to interact by specifically targeting the POPC and POPI lipids amongst others. This work highlights the stabilizing effect of mutations at the 9th and 39th positions of RsAFP2 and their increased membrane deformation activity.
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Affiliation(s)
- Bharati Pandey
- School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Chetna Tyagi
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Gopal Kumar Prajapati
- Department of Bio-Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
| | - Awdhesh Kumar Mishra
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, Republic of Korea
- * E-mail: (AKM); , (TKM)
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza, Egypt
| | - Abdulaziz A. Alqarawi
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Tapan Kumar Mohanta
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
- * E-mail: (AKM); , (TKM)
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14
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Neubauer D, Jaśkiewicz M, Sikorska E, Bartoszewska S, Bauer M, Kapusta M, Narajczyk M, Kamysz W. Effect of Disulfide Cyclization of Ultrashort Cationic Lipopeptides on Antimicrobial Activity and Cytotoxicity. Int J Mol Sci 2020; 21:E7208. [PMID: 33003569 PMCID: PMC7582905 DOI: 10.3390/ijms21197208] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 12/20/2022] Open
Abstract
Ultrashort cationic lipopeptides (USCLs) are considered to be a promising class of antimicrobials with high activity against a broad-spectrum of microorganisms. However, the majority of these compounds are characterized by significant toxicity toward human cells, which hinders their potential application. To overcome those limitations, several approaches have been advanced. One of these is disulfide cyclization that has been shown to improve drug-like characteristics of peptides. In this article the effect of disulfide cyclization of the polar head of N-palmitoylated USCLs on in vitro biological activity has been studied. Lipopeptides used in this study consisted of three or four basic amino acids (lysine and arginine) and cystine in a cyclic peptide. In general, disulfide cyclization of the lipopeptides resulted in peptides with reduced cytotoxicity. Disulfide-cyclized USCLs exhibited improved selectivity between Candida sp., Gram-positive strains and normal cells in contrast to their linear counterparts. Interactions between selected USCLs and membranes were studied by molecular dynamics simulations using a coarse-grained force field. Moreover, membrane permeabilization properties and kinetics were examined. Fluorescence and transmission electron microscopy revealed damage to Candida cell membrane and organelles. Concluding, USCLs are strong membrane disruptors and disulfide cyclization of polar head can have a beneficial effect on its in vitro selectivity between Candida sp. and normal human cells.
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Affiliation(s)
- Damian Neubauer
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland; (M.J.); (S.B.); (M.B.); (W.K.)
| | - Maciej Jaśkiewicz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland; (M.J.); (S.B.); (M.B.); (W.K.)
| | - Emilia Sikorska
- Department of Organic Chemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland;
| | - Sylwia Bartoszewska
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland; (M.J.); (S.B.); (M.B.); (W.K.)
| | - Marta Bauer
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland; (M.J.); (S.B.); (M.B.); (W.K.)
| | - Małgorzata Kapusta
- Department of Plant Cytology and Embryology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland;
| | - Magdalena Narajczyk
- Laboratory of Electron Microscopy, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland;
| | - Wojciech Kamysz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland; (M.J.); (S.B.); (M.B.); (W.K.)
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15
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Cheng R, Li W, Sample KM, Xu Q, Liu L, Yu F, Nie Y, Zhang X, Luo Z. Characterization of the transcriptional response of Candida parapsilosis to the antifungal peptide MAF-1A. PeerJ 2020; 8:e9767. [PMID: 33194346 PMCID: PMC7482638 DOI: 10.7717/peerj.9767] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 07/29/2020] [Indexed: 01/17/2023] Open
Abstract
Candida parapsilosis is a major fungal pathogen that leads to sepsis. New and more effective antifungal agents are required due to the emergence of resistant fungal strains. MAF-1A is a cationic antifungal peptide isolated from Musca domestica that is effective against a variety of Candida species. However, the mechanism(s) of its antifungal activity remains undefined. Here, we used RNA-seq to identify differentially expressed genes (DEGs) in Candida parapsilosis following MAF-1A exposure. The early (6 h) response included 1,122 upregulated and 1,065 downregulated genes. Late (18 h) responses were associated with the increased expression of 101 genes and the decreased expression of 151 genes. Upon MAF-1A treatment for 18 h, 42 genes were upregulated and 25 genes were downregulated. KEGG enrichment showed that the DEGs in response to MAF-1A were mainly involved in amino acid synthesis and metabolism, oxidative phosphorylation, sterol synthesis, and apoptosis. These results indicate that MAF-1A exerts antifungal activity through interference with Candida parapsilosis cell membrane integrity and organelle function. This provides new insight into the interaction between Candida parapsilosis and this antimicrobial peptide and serves as a reference for future Candida parapsilosis therapies.
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Affiliation(s)
- Rong Cheng
- Guizhou University School of Medicine, Guiyang, China
| | - Wei Li
- Department of Cadiovascular Medicine, Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Klarke M Sample
- Department of Central Lab, Guizhou Provincial People's Hospital, Guiyang, China.,NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China
| | - Qiang Xu
- Department of Central Lab, Guizhou Provincial People's Hospital, Guiyang, China.,NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China
| | - Lin Liu
- NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China.,Department of Respiratory and Critical Care Medicine, Guizhou Provincial People's Hospital, Guiyang, China
| | - Fuxun Yu
- Department of Central Lab, Guizhou Provincial People's Hospital, Guiyang, China.,NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China
| | - Yingjie Nie
- Department of Central Lab, Guizhou Provincial People's Hospital, Guiyang, China.,NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China
| | - Xiangyan Zhang
- NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China.,Department of Respiratory and Critical Care Medicine, Guizhou Provincial People's Hospital, Guiyang, China
| | - Zhenhua Luo
- Department of Central Lab, Guizhou Provincial People's Hospital, Guiyang, China.,NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital, Guiyang, China
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16
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Dong SJ, Jiang YL, Peng J, Zhang CX, Zhu Q, Wang QQ, Liao YN, Pi WL, Dong XY, Yuan JP, Wang JH. Evaluation of ergosterol composition and esterification rate in fungi isolated from mangrove soil, long-term storage of broken spores, and two soils. Appl Microbiol Biotechnol 2020; 104:5461-5475. [PMID: 32333053 DOI: 10.1007/s00253-020-10601-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/24/2020] [Accepted: 03/31/2020] [Indexed: 11/26/2022]
Abstract
Ergosterol is an important fungal-specific biomarker, but its use for fungal biomass estimation is still varied. It is important to distinguish between free and esterified ergosterols, which are mainly located on the plasma membrane and the cytosolic lipid particles, respectively. The present study analyzes free and esterified ergosterol contents in: (1) the fifty-nine strains of culturable fungi isolated from mangrove soil, (2) the broken spores of the fungus Ganoderma lucidum stored in capsule for more than 12 years, and (3) the mangrove soil and nearby campus wood soil samples by high performance liquid chromatography (HPLC). The results show that the contents of free and esterified ergosterols varied greatly in fifty-nine strains of fungi after 5 days of growth, indicating the diversity of ergosterol composition in fungi. The average contents of free and total ergosterols from the fifty-nine strains of fungi are 4.4 ± 1.5 mg/g and 6.1 ± 1.9 mg/g dry mycelia, respectively, with an average ergosterol esterification rate of 27.4%. The present study suggests that the fungi might be divided into two classes, one is fungi with high esterification rates (e.g., more than 27%) such as Nectria spp. and Fusarium spp., and the other is fungi with low esterification rates (e.g., less than 27%) such as Penicillium spp. and Trichoderma spp. Moreover, the ergosterol esterification rate in the spores of G. lucidum is 91.4% with a very small amount of free ergosterol (0.015 mg/g), compared with 41.9% with a higher level of free ergosterol (0.499 mg/g) reported in our previous study in 2007, indicating that free ergosterol degrades more rapidly than esterified ergosterol. In addition, the ergosterol esterification rates in mangrove soil and nearby campus wood soil samples range from 0 to 39.0%, compared with 80% in an old soil organic matter reported in a previous study, indicating the potential relationship between aging degree of fungi or soil and esterification rate. The present study proposes that both free and esterified ergosterols should be analyzed for fungal biomass estimation. When the ergosterol esterification rates in soils are higher, free ergosterol might be a better marker for fungal biomass. It is speculated that the ergosterol esterification rate in soils might contain some important information, such as the age of old-growth forests over time scales of centuries to millennia, besides the senescence degree of fungal mycelia in soils. KEY POINTS: • Fungi might be divided into two classes depending on ergosterol esterification rates. • Ergosterol esterification rate of broken spores stored for long time raised evidently. • Both free and esterified ergosterols should be analyzed for fungal biomass estimate. • Free ergosterol is a better marker for fungal biomass with a high esterification rate.
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Affiliation(s)
- Shu-Jun Dong
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China
| | - Yun-Lin Jiang
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China
| | - Juan Peng
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China.
| | - Chen-Xi Zhang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China
| | - Qing Zhu
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China
| | - Qin-Qing Wang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China
| | - Yi-Nan Liao
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China
| | - Wei-Ling Pi
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China
| | - Xi-Yang Dong
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China
| | - Jian-Ping Yuan
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China.
| | - Jiang-Hai Wang
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, People's Republic of China
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China
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17
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Oliveira FFM, Paes HC, Peconick LDF, Fonseca FL, Marina CLF, Bocca AL, Homem-de-Mello M, Rodrigues ML, Albuquerque P, Nicola AM, Alspaugh JA, Felipe MSS, Fernandes L. Erg6 affects membrane composition and virulence of the human fungal pathogen Cryptococcus neoformans. Fungal Genet Biol 2020; 140:103368. [PMID: 32201128 DOI: 10.1016/j.fgb.2020.103368] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 02/12/2020] [Accepted: 02/17/2020] [Indexed: 12/12/2022]
Abstract
Ergosterol is the most important membrane sterol in fungal cells and a component not found in the membranes of human cells. We identified the ERG6 gene in the AIDS-associated fungal pathogen, Cryptococcus neoformans, encoding the sterol C-24 methyltransferase of fungal ergosterol biosynthesis. In this work, we have explored its relationship with high-temperature growth and virulence of C. neoformans by the construction of a loss-of-function mutant. In contrast to other genes involved in ergosterol biosynthesis, C. neoformans ERG6 is not essential for growth under permissive conditions in vitro. However, the erg6 mutant displayed impaired thermotolerance and increased susceptibility to osmotic and oxidative stress, as well as to different antifungal drugs. Total lipid analysis demonstrated a decrease in the erg6Δ strain membrane ergosterol content. In addition, this mutant strain was avirulent in an invertebrate model of C. neoformans infection. C. neoformans Erg6 was cyto-localized in the endoplasmic reticulum and Golgi complex. Our results demonstrate that Erg6 is crucial for growth at high temperature and virulence, likely due to its effects on C. neoformans membrane integrity and dynamics. These pathogen-focused investigations into ergosterol biosynthetic pathway components reinforce the multiple roles of ergosterol in the response of diverse fungal species to alterations in the environment, especially that of the infected host. These studies open perspectives to understand the participation of ergosterol in mechanism of resistance to azole and polyene drugs. Observed synergistic growth defects with co-inhibition of Erg6 and other components of the ergosterol biosynthesis pathway suggests novel approaches to treatment in human fungal infections.
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Affiliation(s)
- Fabiana Freire M Oliveira
- Faculty of Medicine, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasília, Federal District 70910-900, Brazil
| | - Hugo Costa Paes
- Faculty of Medicine, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasília, Federal District 70910-900, Brazil
| | - Luísa Defranco F Peconick
- Faculty of Ceilândia, Campus UnB Ceilândia, University of Brasília, Ceilândia Sul, Centro Metropolitano, Brasília, Federal District 72220-275, Brazil
| | - Fernanda L Fonseca
- Center for Technological Development in Health (CDTS), Fiocruz-RJ, Rio de Janeiro 21045-360, Brazil.
| | - Clara Luna Freitas Marina
- Laboratory of Applied Immunology, Institute of Biology, Room J1 28/8, Building J, 2nd Floor, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasilia, Federal District 70910-900, Brazil
| | - Anamélia Lorenzetti Bocca
- Laboratory of Applied Immunology, Institute of Biology, Room J1 28/8, Building J, 2nd Floor, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasilia, Federal District 70910-900, Brazil.
| | - Mauricio Homem-de-Mello
- Faculty of Health Science, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasília, Federal District 70910-900, Brazil.
| | - Márcio Lourenço Rodrigues
- Carlos Chagas Institute, Fiocruz-PR, Curitiba 81310-020, Brazil; Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro 21941-590, Brazil
| | - Patrícia Albuquerque
- Faculty of Ceilândia, Campus UnB Ceilândia, University of Brasília, Ceilândia Sul, Centro Metropolitano, Brasília, Federal District 72220-275, Brazil
| | - André Moraes Nicola
- Faculty of Medicine, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasília, Federal District 70910-900, Brazil
| | - J Andrew Alspaugh
- Duke University School of Medicine, Dept. of Medicine, Durham, DUMC Box 102359, 303 Sands Building, Research Drive, Durham, NC 27710, USA.
| | - Maria Sueli S Felipe
- Catolic University of Brasilia, Campus Asa Norte, SGAN 916 Módulo B Avenida W5, Asa Norte, Brasília, Federal District 70790-160, Brazil
| | - Larissa Fernandes
- Faculty of Ceilândia, Campus UnB Ceilândia, University of Brasília, Ceilândia Sul, Centro Metropolitano, Brasília, Federal District 72220-275, Brazil; Laboratory of Applied Immunology, Institute of Biology, Room J1 28/8, Building J, 2nd Floor, Campus Darcy Ribeiro, University of Brasília, Asa Norte, Brasilia, Federal District 70910-900, Brazil.
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18
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da Silva Neto JX, da Costa HPS, Vasconcelos IM, Pereira ML, Oliveira JTA, Lopes TDP, Dias LP, Araújo NMS, Moura LFWG, Van Tilburg MF, Guedes MIF, Lopes LA, Morais EG, de Oliveira Bezerra de Sousa D. Role of membrane sterol and redox system in the anti-candida activity reported for Mo-CBP 2, a protein from Moringa oleifera seeds. Int J Biol Macromol 2020; 143:814-824. [PMID: 31734363 DOI: 10.1016/j.ijbiomac.2019.09.142] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 09/19/2019] [Accepted: 09/20/2019] [Indexed: 12/12/2022]
Abstract
Plant proteins are emerging as an alternative to conventional treatments against candidiasis. The aim of this study was to better understand the mechanism of action of Mo-CBP2 against Candida spp, evaluating redox system activity, lipid peroxidation, DNA degradation, cytochrome c release, medium acidification, and membrane interaction. Anti-candida activity of Mo-CBP2 decreased in the presence of ergosterol, which was not observed with antioxidant agents. C. albicans treated with Mo-CBP2 also had catalase and peroxidase activities inhibited, while superoxide dismutase was increased. Mo-CBP2 increased the lipid peroxidation, but it did not alter the ergosterol profile in live cells. External medium acidification was strongly inhibited, and cytochrome c release and DNA degradation were detected. Mo-CBP2 interacts with cell membrane constituents, changes redox system enzymes in C. albicans and causes lipid peroxidation by ROS overproduction. DNA degradation and cytochrome c release suggest apoptotic or DNAse activity. Lipid peroxidation and H+-ATPases inhibition may induce the process of apoptosis. Finally, Mo-CBP2 did not have a cytotoxic effect in mammalian Vero cells. This study highlights the biotechnological potential of Mo-CBP2 as a promising molecule with low toxicity and potent activity. Further studies should be performed to better understand its mode of action and toxicity.
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Affiliation(s)
- João Xavier da Silva Neto
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | - Ilka Maria Vasconcelos
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | - Jose Tadeu Abreu Oliveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | - Lucas Pinheiro Dias
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | | | - Mauricio Fraga Van Tilburg
- Northeast Biotechnology Network, Graduate Program of Biotechnology, State University of Ceará, Fortaleza, CE, Brazil
| | - Maria Izabel Florindo Guedes
- Northeast Biotechnology Network, Graduate Program of Biotechnology, State University of Ceará, Fortaleza, CE, Brazil
| | - Larissa Alves Lopes
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Eva Gomes Morais
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil
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19
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Liu J, Chai X, Guo T, Wu J, Yang P, Luo Y, Zhao H, Zhao W, Nkechi O, Dong J, Bai J, Lin Q. Disruption of the Ergosterol Biosynthetic Pathway Results in Increased Membrane Permeability, Causing Overproduction and Secretion of Extracellular Monascus Pigments in Submerged Fermentation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:13673-13683. [PMID: 31617717 DOI: 10.1021/acs.jafc.9b05872] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Because Monascus pigments (MPs) predominantly accumulate in the cytoplasm during submerged fermentation, many biotechnologies are applied to enhance the production of extracellular MPs (exMPs) to reduce the downstream processing costs. In this study, the genes monascus_7017 and monascus_8018, identified as ERG4 genes, were knocked out to disrupt the ergosterol biosynthetic pathway and enhance the production of exMPs in Monascus purpureus LQ-6. Double-deletion of EGR4 in M. purpureus LQ-6 reduced ergosterol concentration by 57.14% and enhanced exMP production 2.06-fold. In addition, integrated transcriptomic and proteomic analyses were performed to elucidate the transmembrane secretion mechanism of exMPs based on the relationship between ergosterol synthesis and membrane permeability, which revealed that several metabolic pathways were noticeably dynamic, including fatty acid degradation, amino acid metabolism, energy metabolism, carbohydrate metabolism, and transport. These findings therefore clarified the secretion mechanism of exMPs and provide a novel strategy for further enhancement of exMP production in submerged fermentation.
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Affiliation(s)
- Jun Liu
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Xueying Chai
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Ting Guo
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Jingyan Wu
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Pengpeng Yang
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , No. 30, Puzhu South Road , Nanjing 211816 , China
| | - Yunchuan Luo
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Hui Zhao
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Wen Zhao
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Omeoga Nkechi
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Jie Dong
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Jie Bai
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
| | - Qinlu Lin
- National Engineering Laboratory for Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering , Central South University of Forestry and Technology , Changsha , Hunan 410004 , China
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20
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Perczyk P, Wójcik A, Wydro P, Broniatowski M. The role of phospholipid composition and ergosterol presence in the adaptation of fungal membranes to harsh environmental conditions-membrane modeling study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1862:183136. [PMID: 31751523 DOI: 10.1016/j.bbamem.2019.183136] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/30/2019] [Accepted: 10/28/2019] [Indexed: 01/18/2023]
Abstract
Soil fungi play an important role in the environment decomposing dead organic matter and degrading persistent organic pollutants (POP). The presence of hydrophobic POP in the soil and membrane-lytic substances excreted by competing microorganism to the soil solution is the constant threat to these organisms. To survive in the harsh environment and counteract these hazards the fungal cells have to strictly control the composition of the lipids in their cellular membranes. However, in the case of fungal membranes the correlation between their composition and physical properties is not fully understood. In our studies we applied Langmuir monolayers formed by phospholipids typical to fungal membranes and ergosterol as versatile model membranes. These membranes were characterized by the Langmuir technique, Brewster Angle Microscopy and Grazing Incidence X-ray Diffraction, as well as were exposed to the action of phospholipase A2 treated as a model membrane-lytic protein. We started our studies from the equimolar mixture of phosphatidylethanolamine with phosphatidylcholine and doped this matrix with phosphatidylserine (PS) or phosphatidylinositol (PI). It turned out that the membranes with PS were much more condensed at the mesoscale and periodically organized at the molecular level. Starting from these models we derived two families of model fungal membranes adding to these phospholipid matrices ergosterol. It turned out that the level of ergosterol content is of crucial importance for the model membrane structure and its durability. Changing the ergosterol mole ratio from 0 to 0.5 we defined and described in detail four different 2D crystalline phases.
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Affiliation(s)
- Paulina Perczyk
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Aneta Wójcik
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Paweł Wydro
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Marcin Broniatowski
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
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21
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Ermakova E, Kurbanov R, Zuev Y. Coarse-grained molecular dynamics of membrane semitoroidal pore formation in model lipid-peptide systems. J Mol Graph Model 2019; 87:1-10. [DOI: 10.1016/j.jmgm.2018.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 11/06/2018] [Accepted: 11/06/2018] [Indexed: 12/31/2022]
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