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Masanta S, Wiesyk A, Panja C, Pilch S, Ciesla J, Sipko M, De A, Enkhbaatar T, Maslanka R, Skoneczna A, Kucharczyk R. Fmp40 ampylase regulates cell survival upon oxidative stress by controlling Prx1 and Trx3 oxidation. Redox Biol 2024; 73:103201. [PMID: 38795545 PMCID: PMC11140801 DOI: 10.1016/j.redox.2024.103201] [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: 04/21/2024] [Revised: 05/16/2024] [Accepted: 05/19/2024] [Indexed: 05/28/2024] Open
Abstract
Reactive oxygen species (ROS), play important roles in cellular signaling, nonetheless are toxic at higher concentrations. Cells have many interconnected, overlapped or backup systems to neutralize ROS, but their regulatory mechanisms remain poorly understood. Here, we reveal an essential role for mitochondrial AMPylase Fmp40 from budding yeast in regulating the redox states of the mitochondrial 1-Cys peroxiredoxin Prx1, which is the only protein shown to neutralize H2O2 with the oxidation of the mitochondrial glutathione and the thioredoxin Trx3, directly involved in the reduction of Prx1. Deletion of FMP40 impacts a cellular response to H2O2 treatment that leads to programmed cell death (PCD) induction and an adaptive response involving up or down regulation of genes encoding, among others the catalase Cta1, PCD inducing factor Aif1, and mitochondrial redoxins Trx3 and Grx2. This ultimately perturbs the reduced glutathione and NADPH cellular pools. We further demonstrated that Fmp40 AMPylates Prx1, Trx3, and Grx2 in vitro and interacts with Trx3 in vivo. AMPylation of the threonine residue 66 in Trx3 is essential for this protein's proper endogenous level and its precursor forms' maturation under oxidative stress conditions. Additionally, we showed the Grx2 involvement in the reduction of Trx3 in vivo. Taken together, Fmp40, through control of the reduction of mitochondrial redoxins, regulates the hydrogen peroxide, GSH and NADPH signaling influencing the yeast cell survival.
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Affiliation(s)
- Suchismita Masanta
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Aneta Wiesyk
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Chiranjit Panja
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Sylwia Pilch
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Jaroslaw Ciesla
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Marta Sipko
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Abhipsita De
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Tuguldur Enkhbaatar
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Roman Maslanka
- Institute of Biology, College of Natural Sciences, University of Rzeszow, Rzeszow, Poland
| | - Adrianna Skoneczna
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland
| | - Roza Kucharczyk
- Institute of Biochemistry and Biophysics PAS, Warsaw, 02-106, Pawinskiego 5A, Poland.
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Li CC, Yang MJ, Yang J, Kang M, Li T, He LH, Song YJ, Zhu YB, Zhao NL, Zhao C, Huang Q, Mou XY, Li H, Tong AP, Tang H, Bao R. Structural and biochemical analysis of 1-Cys peroxiredoxin ScPrx1 from Saccharomyces cerevisiae mitochondria. Biochim Biophys Acta Gen Subj 2020; 1864:129706. [PMID: 32805320 DOI: 10.1016/j.bbagen.2020.129706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 07/13/2020] [Accepted: 08/05/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND ScPrx1 is a yeast mitochondrial 1-Cys peroxiredoxins (Prx), a type of Prx enzyme which require thiol-containing reducing agents to resolve its peroxidatic cysteine. ScPrx1 plays important role in protection against oxidative stress. Mitochondrial thioredoxin ScTrx3 and glutathione have been reported to be the physiological electron donor for ScPrx1. However, the mechanism underlying their actions, especially the substrate recognition of ScPrx1 requires additional elucidation. METHODS The structure of ScPrx1 was obtained through crystallization experiments. The oligomeric state of ScPrx1 was monitored by Blue-Native PAGE. Mutations were generated by the QuikChange PCR-based method. The ScPrx1 activity assay was carried out by measuring the change of 340 nm absorption of the NADPH oxidation. RESULTS ScPrx1 exist as a homodimer in solution. The structure adopts a typical Prx-fold core which is preceded by an N-terminal β-hairpin and has a C-terminal extension. Mutations (Glu94Ala, Arg198Ala and Trp126) close to the active site could enhance the catalytic efficiency of ScPrx1 while His83Ala and mutations on α4-β6 region exhibited reduced activity. The biochemical data also show that the deletion or mutations on ScPrx1 C-terminal have 2-4.56 fold increased activity. CONCLUSION We inferred that conformational changes of ScPrx1 C-terminal segment were important for its reaction, and the α4-β6 loop regions around the ScPrx1 active sites were important for the catalytic function of ScPrx1. Collectively, these structural features provides a basis for understanding the diverse reductant species usage in different 1-Cys Prxs.
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Affiliation(s)
- Chang-Cheng Li
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Mei-Jia Yang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Jing Yang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Mei Kang
- Department of Laboratory medicine, West, China Hospital, Sichuan University
| | - Tao Li
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Li-Hui He
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Ying-Jie Song
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Yi-Bo Zhu
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Ning-Lin Zhao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Chang Zhao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Qin Huang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Xing-Yu Mou
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Hong Li
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Ai-Ping Tong
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Hong Tang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Rui Bao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center.
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Thiol Peroxidases as Major Regulators of Intracellular Levels of Peroxynitrite in Live Saccharomyces cerevisiae Cells. Antioxidants (Basel) 2020; 9:antiox9050434. [PMID: 32429358 PMCID: PMC7278867 DOI: 10.3390/antiox9050434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 12/27/2022] Open
Abstract
Thiol peroxidases (TP) are ubiquitous and abundant antioxidant proteins of the peroxiredoxin and glutathione peroxidase families that can catalytically and rapidly reduce biologically relevant peroxides, such as hydrogen peroxide and peroxynitrite. However, the TP catalytic cycle is complex, depending on multiple redox reactions and partners, and is subjected to branching and competition points that may limit their peroxide reductase activity in vivo. The goals of the present study were to demonstrate peroxynitrite reductase activity of TP members in live cells in real time and to evaluate its catalytic characteristics. To these ends, we developed a simple fluorescence assay using coumarin boronic acid (CBA), exploiting that fact that TP and CBA compete for peroxynitrite, with the expectation that higher TP peroxynitrite reductase activity will lower the CBA oxidation. TP peroxynitrite reductase activity was evaluated by comparing CBA oxidation in live wild type and genetically modified Δ8 (TP-deficient strain) and Δ8+TSA1 (Δ8 strain that expresses only one TP member, the TSA1 gene) Saccharomyces cerevisiae strains. The results showed that CBA oxidation decreased with cell density and increased with increasing peroxynitrite availability. Additionally, the rate of CBA oxidation decreased in the order Δ8 > Δ8+TSA1 > WT strains both in control and glycerol-adapted (expressing higher TP levels) cells, showing that the CBA competition assay could reliably detect peroxynitrite in real time in live cells, comparing CBA oxidation in strains with reduced and increased TP expression. Finally, there were no signs of compromised TP peroxynitrite reductase activity during experimental runs, even at the highest peroxynitrite levels tested. Altogether, the results show that TP is a major component in the defense of yeast against peroxynitrite insults under basal and increasing stressful conditions.
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Mapping the interaction of Snf1 with TORC1 in Saccharomyces cerevisiae. Mol Syst Biol 2011; 7:545. [PMID: 22068328 PMCID: PMC3261716 DOI: 10.1038/msb.2011.80] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 09/29/2011] [Indexed: 01/09/2023] Open
Abstract
Nutrient sensing and coordination of metabolic pathways are crucial functions for living cells. A combined analysis of the yeast transcriptome, phosphoproteome and metabolome is used to investigate the interactions between the Snf1 and TORC1 pathways under nutrient-limited conditions. Snf1 regulates a broad range of biological processes, while target of rapamycin complex 1 (TORC1) seems to be repressed under both glucose- and ammonium-limited conditions. Snf1 has a role in regulating amino acids by upregulating the NADP+-dependent glutamate dehydrogenase (encoded by GDH3) under glucose-limited condition. In addition to the accepted role of Snf1 in regulating fatty acid (FA) metabolism, TORC1 may also regulate FA metabolism. Direct interactions between Snf1 and TORC1 pathways are unlikely under nutrient-limited conditions and TORC1 might be repressed in a manner that is independent of Snf1.
Nutrient sensing and coordination of metabolic pathways are crucial functions for all living cells, but details of the coordination under different environmental conditions remain elusive. We therefore undertook a systems biology approach to investigate the interactions between the Snf1 and the target of rapamycin complex 1 (TORC1) in Saccharomyces cerevisiae. We show that Snf1 regulates a much broader range of biological processes compared with TORC1 under both glucose- and ammonium-limited conditions. We also find that Snf1 has a role in upregulating the NADP+-dependent glutamate dehydrogenase (encoded by GDH3) under derepressing condition, and therefore may also have a role in ammonium assimilation and amino-acid biosynthesis, which can be considered as a convergence of Snf1 and TORC1 pathways. In addition to the accepted role of Snf1 in regulating fatty acid (FA) metabolism, we show that TORC1 also regulates FA metabolism, likely through modulating the peroxisome and β-oxidation. Finally, we conclude that direct interactions between Snf1 and TORC1 pathways are unlikely under nutrient-limited conditions and propose that TORC1 is repressed in a manner that is independent of Snf1.
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Murray DB, Haynes K, Tomita M. Redox regulation in respiring Saccharomyces cerevisiae. Biochim Biophys Acta Gen Subj 2011; 1810:945-58. [PMID: 21549177 DOI: 10.1016/j.bbagen.2011.04.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 03/16/2011] [Accepted: 04/17/2011] [Indexed: 11/30/2022]
Abstract
BACKGROUND In biological systems, redox reactions are central to most cellular processes and the redox potential of the intracellular compartment dictates whether a particular reaction can or cannot occur. Indeed the widespread use of redox reactions in biological systems makes their detailed description outside the scope of one review. SCOPE OF THE REVIEW Here we will focus on how system-wide redox changes can alter the reaction and transcriptional landscape of Saccharomyces cerevisiae. To understand this we explore the major determinants of cellular redox potential, how these are sensed by the cell and the dynamic responses elicited. MAJOR CONCLUSIONS Redox regulation is a large and complex system that has the potential to rapidly and globally alter both the reaction and transcription landscapes. Although we have a basic understanding of many of the sub-systems and a partial understanding of the transcriptional control, we are far from understanding how these systems integrate to produce coherent responses. We argue that this non-linear system self-organises, and that the output in many cases is temperature-compensated oscillations that may temporally partition incompatible reactions in vivo. GENERAL SIGNIFICANCE Redox biochemistry impinges on most of cellular processes and has been shown to underpin ageing and many human diseases. Integrating the complexity of redox signalling and regulation is perhaps one of the most challenging areas of biology. This article is part of a Special Issue entitled Systems Biology of Microorganisms.
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Affiliation(s)
- Douglas B Murray
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan.
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Caribé dos Santos AC, Sena JAL, Santos SC, Dias CV, Pirovani CP, Pungartnik C, Valle RR, Cascardo JCM, Vincentz M. dsRNA-induced gene silencing in Moniliophthora perniciosa, the causal agent of witches' broom disease of cacao. Fungal Genet Biol 2009; 46:825-36. [PMID: 19602443 DOI: 10.1016/j.fgb.2009.06.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 06/06/2009] [Accepted: 06/29/2009] [Indexed: 10/20/2022]
Abstract
The genome sequence of the hemibiotrophic fungus Moniliophthora perniciosa revealed genes possibly participating in the RNAi machinery. Therefore, studies were performed in order to investigate the efficiency of gene silencing by dsRNA. We showed that the reporter gfp gene stably introduced into the fungus genome can be silenced by transfection of in vitro synthesized gfpdsRNA. In addition, successful dsRNA-induced silencing of endogenous genes coding for hydrophobins and a peroxiredoxin were also achieved. All genes showed a silencing efficiency ranging from 18% to 98% when compared to controls even 28d after dsRNA treatment, suggesting systemic silencing. Reduction of GFP fluorescence, peroxidase activity levels and survival responses to H(2)O(2) were consistent with the reduction of GFP and peroxidase mRNA levels, respectively. dsRNA transformation of M. perniciosa is shown here to efficiently promote genetic knockdown and can thus be used to assess gene function in this pathogen.
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Affiliation(s)
- A C Caribé dos Santos
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Ilhéus - Itabuna, Km 16, CEP 45662-000 Ilhéus, BA, Brazil
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Gessler NN, Aver’yanov AA, Belozerskaya TA. Reactive oxygen species in regulation of fungal development. BIOCHEMISTRY (MOSCOW) 2007; 72:1091-109. [DOI: 10.1134/s0006297907100070] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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8
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Belozerskaya TA, Gessler NN. Reactive oxygen species and the strategy of antioxidant defense in fungi: A review. APPL BIOCHEM MICRO+ 2007. [DOI: 10.1134/s0003683807050031] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Netto LES, de Oliveira MA, Monteiro G, Demasi APD, Cussiol JRR, Discola KF, Demasi M, Silva GM, Alves SV, Faria VG, Horta BB. Reactive cysteine in proteins: protein folding, antioxidant defense, redox signaling and more. Comp Biochem Physiol C Toxicol Pharmacol 2007; 146:180-193. [PMID: 17045551 DOI: 10.1016/j.cbpc.2006.07.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2006] [Revised: 07/13/2006] [Accepted: 07/31/2006] [Indexed: 01/11/2023]
Abstract
Cysteine plays structural roles in proteins and can also participate in electron transfer reactions, when some structural folds provide appropriated environments for stabilization of its sulfhydryl group in the anionic form, called thiolate (RS(-)). In contrast, sulfhydryl group of free cysteine has a relatively high pK(a) (8,5) and as a consequence is relatively inert for redox reaction in physiological conditions. Thiolate is considerable more powerful as nucleophilic agent than its protonated form, therefore, reactive cysteine are present mainly in its anionic form in proteins. In this review, we describe several processes in which reactive cysteine in proteins take part, showing a high degree of redox chemistry versatility.
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Affiliation(s)
- Luis Eduardo Soares Netto
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil.
| | - Marcos Antonio de Oliveira
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Gisele Monteiro
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Ana Paula Dias Demasi
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - José Renato Rosa Cussiol
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Karen Fulan Discola
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Marilene Demasi
- Laboratório de Bioquímica e Biofísica, Instituto Butantan, São Paulo-SP, Brazil
| | - Gustavo Monteiro Silva
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Simone Vidigal Alves
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Victor Genu Faria
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
| | - Bruno Brasil Horta
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo-SP, Brazil
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Chung KS, Sun NK, Lee SH, Lee HJ, Choi SJ, Kim SK, Song JH, Jang YJ, Song KB, Yoo HS, Simon J, Won M. Cerulenin-mediated apoptosis is involved in adenine metabolic pathway. Biochem Biophys Res Commun 2006; 349:1025-31. [PMID: 16962997 DOI: 10.1016/j.bbrc.2006.08.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Accepted: 08/22/2006] [Indexed: 11/27/2022]
Abstract
Cerulenin, a fatty acid synthase (FAS) inhibitor, induces apoptosis of variety of tumor cells. To elucidate mode of action by cerulenin, we employed the proteomics approach using Schizosaccharomyces pombe. The differential protein expression profile of S. pombe revealed that cerulenin modulated the expressions of proteins involved in stresses and metabolism, including both ade10 and adk1 proteins. The nutrient supplementation assay demonstrated that cerulenin affected enzymatic steps transferring a phosphoribosyl group. This result suggests that cerulenin accumulates AMP and p-ribosyl-s-amino-imidazole carboxamide (AICAR) and reduces other necessary nucleotides, which induces feedback inhibition of enzymes and the transcriptional regulation of related genes in de novo and salvage adenine metabolic pathway. Furthermore, the deregulation of adenine nucleotide synthesis may interfere ribonucleotide reductase and cause defects in cell cycle progression and chromosome segregation. In conclusion, cerulenin induces apoptosis through deregulation of adenine nucleotide biosynthesis resulting in nuclear division defects in S. pombe.
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Affiliation(s)
- Kyung-Sook Chung
- Biopharmaceutical Division, KRIBB, 52 Oun-dong, Yusong-gu, Daejeon 305-806, Republic of Korea
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Barbosa JARG, Netto LES, Farah CS, Schenkman S, Meneghini R. The structural molecular biology network of the State of São Paulo, Brazil. AN ACAD BRAS CIENC 2006; 78:241-53. [PMID: 16710564 DOI: 10.1590/s0001-37652006000200006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This article describes the achievements of the Structural Molecular Biology Network (SMolBNet), a collaborative program of structural molecular biology, centered in the State of São Paulo, Brazil, and supported by São Paulo State Funding Agency (FAPESP). It gathers twenty scientific groups and is coordinated by the scientific staff of the Center of Structural Molecular Biology, at the National Laboratory of Synchrotron Light (LNLS), in Campinas. The SMolBNet program has been aimed at 1) solving the structure of proteins of interest related to the research projects of the groups. In some cases, the choice has been to select proteins of unknown function or of possible novel structure obtained from the sequenced genomes of the FAPESP genomic program; 2) providing the groups with training in all the steps of the protein structure determination: gene cloning, protein expression, protein purification, protein crystallization and structure determination. Having begun in 2001, the program has been successful in both aims. Here, four groups reveal their participation in the program and describe the structural aspects of the proteins they have selected to study.
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Affiliation(s)
- João A R G Barbosa
- Laboratório Nacional de Luz Síncrotron, Centro de Biologia Molecular Estrutural, 13084-971 Campinas, SP, Brazil
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Ando A, Tanaka F, Murata Y, Takagi H, Shima J. Identification and classification of genes required for tolerance to high-sucrose stress revealed by genome-wide screening of Saccharomyces cerevisiae. FEMS Yeast Res 2006; 6:249-67. [PMID: 16487347 DOI: 10.1111/j.1567-1364.2006.00035.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Yeasts used in bread making are exposed to high concentrations of sucrose during sweet dough fermentation. Despite its importance, tolerance to high-sucrose stress is poorly understood at the gene level. To clarify the genes required for tolerance to high-sucrose stress, genome-wide screening was undertaken using the complete deletion strain collection of diploid Saccharomyces cerevisiae. The screening identified 273 deletions that yielded high sucrose sensitivity, approximately 20 of which were previously uncharacterized. These 273 deleted genes were classified based on their cellular function and localization of their gene products. Cross-sensitivity of the high-sucrose-sensitive mutants to high concentrations of NaCl and sorbitol was studied. Among the 273 sucrose-sensitive deletion mutants, 269 showed cross-sensitivities to sorbitol or NaCl, and four (i.e. ade5,7, ade6, ade8, and pde2) were specifically sensitive to high sucrose. The general stress response pathways via high-osmolarity glycerol and stress response element pathways and the function of the invertase in the ade mutants were similar to those in the wild-type strain. In the presence of high-sucrose stress, intracellular contents of ATP in ade mutants were at least twofold lower than that of the wild-type cells, suggesting that depletion of ATP is a factor in sensitivity to high-sucrose stress. The genes identified in this study might be important for tolerance to high-sucrose stress, and therefore should be target genes in future research into molecular modification for breeding of yeast tolerant to high-sucrose stress.
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Affiliation(s)
- Akira Ando
- National Food Research Institute, Ibaraki, Japan
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Current awareness on yeast. Yeast 2005. [DOI: 10.1002/yea.1166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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