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Schwarz LV, Sandri FK, Scariot F, Delamare APL, Valera MJ, Carrau F, Echeverrigaray S. High nitrogen concentration causes G2/M arrest in Hanseniaspora vineae. Yeast 2023; 40:640-650. [PMID: 37997429 DOI: 10.1002/yea.3911] [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: 07/04/2023] [Revised: 10/26/2023] [Accepted: 11/09/2023] [Indexed: 11/25/2023] Open
Abstract
Yeasts have been widely used as a model to better understand cell cycle mechanisms and how nutritional and genetic factors can impact cell cycle progression. While nitrogen scarcity is well known to modulate cell cycle progression, the relevance of nitrogen excess for microorganisms has been overlooked. In our previous work, we observed an absence of proper entry into the quiescent state in Hanseniaspora vineae and identified a potential link between this behavior and nitrogen availability. Furthermore, the Hanseniaspora genus has gained attention due to a significant loss of genes associated with DNA repair and cell cycle. Thus, the aim of our study was to investigate the effects of varying nitrogen concentrations on H. vineae's cell cycle progression. Our findings demonstrated that nitrogen excess, regardless of the source, disrupts cell cycle progression and induces G2/M arrest in H. vineae after reaching the stationary phase. Additionally, we observed a viability decline in H. vineae cells in an ammonium-dependent manner, accompanied by increased production of reactive oxygen species, mitochondrial hyperpolarization, intracellular acidification, and DNA fragmentation. Overall, our study highlights the events of the cell cycle arrest in H. vineae induced by nitrogen excess and attempts to elucidate the possible mechanism triggering this absence of proper entry into the quiescent state.
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Affiliation(s)
- Luisa Vivian Schwarz
- Institute of Biotechnology, University of Caxias do Sul (UCS), Caxias do Sul, Rio Grande do Sul, Brazil
| | - Fernanda Knaach Sandri
- Institute of Biotechnology, University of Caxias do Sul (UCS), Caxias do Sul, Rio Grande do Sul, Brazil
| | - Fernando Scariot
- Institute of Biotechnology, University of Caxias do Sul (UCS), Caxias do Sul, Rio Grande do Sul, Brazil
| | | | - Maria Jose Valera
- Enology and Fermentation Biotechnology Area, Departamento Ciencia y Tecnología Alimentos, Facultad de Química, Universidad de la Republica, Montevideo, Uruguay
| | - Francisco Carrau
- Enology and Fermentation Biotechnology Area, Departamento Ciencia y Tecnología Alimentos, Facultad de Química, Universidad de la Republica, Montevideo, Uruguay
| | - Sergio Echeverrigaray
- Institute of Biotechnology, University of Caxias do Sul (UCS), Caxias do Sul, Rio Grande do Sul, Brazil
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Optimization of reactive black 5 decolorization by the newly isolated Saccharomyces cerevisiae X19G2 using response-surface methodology. 3 Biotech 2022; 12:142. [PMID: 35664650 DOI: 10.1007/s13205-022-03191-6] [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: 01/31/2022] [Accepted: 04/26/2022] [Indexed: 11/01/2022] Open
Abstract
In the current investigation, the capacity of different yeast strains to decolorize reactive black 5 (RB-5) was assessed. A comparative study between the different strains demonstrated that Saccharomyces cerevisiae X19G2 exhibited the highest decolorization rate (69.20 ± 1.16%) after 48 h of incubation. This strain was selected to optimize the medium components' concentrations for maximum RB-5 decolorization. Response-surface methodology (RSM) was tested for the most significant parameters (glucose, yeast extract and RB-5 dye concentrations) that were previously determined by Plackett-Burman design. A dye decolorization rate of 99.59 ± 0.24% was achieved within 48 h using a maximum RB-5 concentration (0.15 g/L) with glucose and yeast extract concentrations equalling to 10.5 g/L and 1 g/L, respectively. Experimental data results proved to fit well with the pseudo-second order kinetics model. The phytotoxicity assessment was carried out using Raphanus sativus seeds to determine the toxicity of RB-5 before and after treatment by S. cerevisiae. Results suggested that germination rate and the length of seeds radical irrigated with 0.15 g/L of RB-5 decreased by 30 and 53%, compared to those irrigated with treated solution. Therefore, metabolites derived from decolorization of RB-5 by S. cerevisiae X19G2 were significantly less toxic than the original dye.
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Maresh ME, Chen P, Hazbun TR, Trader DJ. A Yeast Chronological Lifespan Assay to Assess Activity of Proteasome Stimulators. Chembiochem 2021; 22:2553-2560. [PMID: 34043860 PMCID: PMC8478123 DOI: 10.1002/cbic.202100117] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/26/2021] [Indexed: 11/10/2022]
Abstract
Aging is characterized by changes in several cellular processes, including dysregulation of proteostasis. Current research has shown long-lived rodents display elevated proteasome activity throughout life and proteasome dysfunction is linked to shorter lifespans in a transgenic mouse model. The ubiquitin proteasome system (UPS) is one of the main pathways leading to cellular protein clearance and quality maintenance. Reduction in proteasome activity is associated with aging and its related pathologies. Small molecule stimulators of the proteasome have been proposed to help alleviate cellular stress related to unwanted protein accumulation. Here we have described the development of techniques to monitor the impact of proteasome stimulation in wild-type yeast and a strain that has impaired proteasome expression. We validated our chronological lifespan assay using both types of yeast with a variety of small molecule stimulators at different concentrations. By modifying the media conditions for the yeast, molecules can be evaluated for their potential to increase chronological lifespan in five days. Additionally, our assay conditions can be used to monitor the activity of proteasome stimulators in modulating the degradation of a YFP-α-synuclein fusion protein produced by yeast. We anticipate these methods to be valuable for those wishing to study the impact of increasing proteasome-mediated degradation of proteins in a eukaryotic model organism.
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Affiliation(s)
- Marianne E. Maresh
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana, 47907
| | - Panyue Chen
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana, 47907
| | - Tony R. Hazbun
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana, 47907
| | - Darci J. Trader
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana, 47907
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Câmara ADA, Maréchal PA, Tourdot-Maréchal R, Husson F. Oxidative stress resistance during dehydration of three non-Saccharomyces wine yeast strains. Food Res Int 2019; 123:364-372. [DOI: 10.1016/j.foodres.2019.04.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/24/2019] [Accepted: 04/25/2019] [Indexed: 02/06/2023]
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Kiayi Z, Lotfabad TB, Heidarinasab A, Shahcheraghi F. Microbial degradation of azo dye carmoisine in aqueous medium using Saccharomyces cerevisiae ATCC 9763. JOURNAL OF HAZARDOUS MATERIALS 2019; 373:608-619. [PMID: 30953978 DOI: 10.1016/j.jhazmat.2019.03.111] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 03/23/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Carmoisine is an azo dye widely used in many industries, and therefore frequently occurs in the effluent of many factories. To our knowledge, biological degradation of carmoisine has received little attention. The present study investigates the capability of Saccharomyces cerevisiae ATCC 9763 for degradation of carmoisine. Spectrophotometry data indicates that carmoisine (50 mg/l) was eliminated from the aqueous medium after approximately 7 h of incubation with Saccharomyces under anaerobic shaking conditions. Thin layer chromatography (TLC) revealed the removal of carmoisine as well as the appearance of aromatic amines in samples collected from the decolourized medium by S. cerevisiae and this was subsequently confirmed by Fourier transform infrared (FTIR) spectroscopy. Liquid chromatography mass spectrometry (LC/MS) was carried out on fractions from consecutive column chromatography and two-dimensional (2D) chromatography. LC/MS indicated degradation of carmoisine into its constituent aromatic amines. In addition, investigating the effect of environmental conditions on the decolourization process indicated that yeast extract could positively affect decolourization rates; shaking significantly accelerated decolourization and shortened the time required for complete biodecolourization from ≃ 8 days to ≃ 7 h; and Saccharomyces was able to consume sucrose as a carbon source and remove the carmoisine despite the presence of sunset yellow, which remained unaffected.
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Affiliation(s)
- Zahra Kiayi
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Tayebe Bagheri Lotfabad
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Shahrak-e Pajoohesh, Km 15, Tehran-Karaj Highway, P.O. Box: 14965/161, Tehran, Iran.
| | - Amir Heidarinasab
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
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Câmara ADA, Maréchal PA, Tourdot-Maréchal R, Husson F. Dehydration stress responses of yeasts Torulaspora delbrueckii, Metschnikowia pulcherrima and Lachancea thermotolerans: Effects of glutathione and trehalose biosynthesis. Food Microbiol 2019; 79:137-146. [DOI: 10.1016/j.fm.2018.12.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/12/2018] [Accepted: 12/11/2018] [Indexed: 12/17/2022]
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Aluru M, McKinney T, Venero AKL, Choudhury S, Torres M. Mitogen-activated protein kinases, Fus3 and Kss1, regulate chronological lifespan in yeast. Aging (Albany NY) 2017; 9:2587-2609. [PMID: 29273704 PMCID: PMC5764394 DOI: 10.18632/aging.101350] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 12/11/2017] [Indexed: 04/19/2023]
Abstract
Using a systems-based approach, we have identified several genes not previously evaluated for a role(s) in chronological aging. Here, we have thoroughly investigated the chronological lifespan (CLS) of three of these genes (FUS3, KSS1 and HOG1) and their protein products, each of which have well-defined cell signaling roles in young cells. The importance of FUS3 and KSS1 in CLS are largely unknown and analyzed here for the first time. Using both qualitative and quantitative CLS assays, we show that deletion of any of the three MAPK's increases yeast lifespan. Furthermore, combined deletion of any MAPK and TOR1, most prominently fus3Δ/tor1Δ, produces a two-stage CLS response ending in lifespan increase greater than that of tor1Δ. Similar effects are achieved upon endogenous expression of a non-activatable form of Fus3. We speculate that the autophagy-promoting role of FUS3, which is inherently antagonistic to the role of TOR1, may in part be responsible for the differential aging phenotype of fus3Δ/tor1Δ. Consistent with this notion we show that nitrogen starvation, which promotes autophagy by deactivating Tor1, results in decreased CLS if FUS3 is deleted. Taken together, these results reveal a previously unrealized effect of mating-specific MAPKs in the chronological lifespan of yeast.
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Affiliation(s)
- Maneesha Aluru
- Georgia Institute of Technology, School of Biological Sciences, Atlanta, GA 30332, USA
| | - Tori McKinney
- Georgia Institute of Technology, School of Biological Sciences, Atlanta, GA 30332, USA
| | | | - Shilpa Choudhury
- Georgia Institute of Technology, School of Biological Sciences, Atlanta, GA 30332, USA
| | - Matthew Torres
- Georgia Institute of Technology, School of Biological Sciences, Atlanta, GA 30332, USA
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