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Sengupta S, Nath R, Bhattacharjee A. Characterizing the effect of S-nitrosoglutathione on Saccharomyces cerevisiae: Upregulation of alcohol dehydrogenase and inactivation of aconitase. Process Biochem 2022. [DOI: 10.1016/j.procbio.2021.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Morgenstern J, Katz S, Krebs-Haupenthal J, Chen J, Saadatmand A, Cortizo FG, Moraru A, Zemva J, Campos MC, Teleman A, Backs J, Nawroth P, Fleming T. Phosphorylation of T107 by CamKIIδ Regulates the Detoxification Efficiency and Proteomic Integrity of Glyoxalase 1. Cell Rep 2021; 32:108160. [PMID: 32966793 DOI: 10.1016/j.celrep.2020.108160] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/15/2020] [Accepted: 08/26/2020] [Indexed: 01/08/2023] Open
Abstract
The glyoxalase system is a highly conserved and ubiquitously expressed enzyme system, which is responsible for the detoxification of methylglyoxal (MG), a spontaneous by-product of energy metabolism. This study is able to show that a phosphorylation of threonine-107 (T107) in the (rate-limiting) Glyoxalase 1 (Glo1) protein, mediated by Ca2+/calmodulin-dependent kinase II delta (CamKIIδ), is associated with elevated catalytic efficiency of Glo1 (lower KM; higher Vmax). Additionally, we observe proteasomal degradation of non-phosphorylated Glo1 via ubiquitination does occur more rapidly as compared with native Glo1. The absence of CamKIIδ is associated with poor detoxification capacity and decreased protein content of Glo1 in a murine CamKIIδ knockout model. Therefore, phosphorylation of T107 in the Glo1 protein by CamKIIδ is a quick and precise mechanism regulating Glo1 activity, which is experimentally linked to an altered Glo1 status in cancer, diabetes, and during aging.
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Affiliation(s)
- Jakob Morgenstern
- Department of Internal Medicine I and Clinical Chemistry, University Hospital Heidelberg, Heidelberg 69120, Germany.
| | - Sylvia Katz
- Department Molecular Cardiology and Epigenetics, University Hospital of Heidelberg, Heidelberg 69120, Germany
| | - Jutta Krebs-Haupenthal
- Department Molecular Cardiology and Epigenetics, University Hospital of Heidelberg, Heidelberg 69120, Germany
| | - Jessy Chen
- Department Molecular Cardiology and Epigenetics, University Hospital of Heidelberg, Heidelberg 69120, Germany
| | - Alireza Saadatmand
- Department Molecular Cardiology and Epigenetics, University Hospital of Heidelberg, Heidelberg 69120, Germany
| | | | - Alexandra Moraru
- German Center for Diabetes Research (DZD), Neuherberg 85764, Germany
| | - Johanna Zemva
- Department of Internal Medicine I and Clinical Chemistry, University Hospital Heidelberg, Heidelberg 69120, Germany
| | - Marta Campos Campos
- Department of Internal Medicine I and Clinical Chemistry, University Hospital Heidelberg, Heidelberg 69120, Germany
| | - Aurelio Teleman
- German Cancer Research Center (DKFZ), Heidelberg 69120, Germany
| | - Johannes Backs
- Department Molecular Cardiology and Epigenetics, University Hospital of Heidelberg, Heidelberg 69120, Germany
| | - Peter Nawroth
- Department of Internal Medicine I and Clinical Chemistry, University Hospital Heidelberg, Heidelberg 69120, Germany; German Center for Diabetes Research (DZD), Neuherberg 85764, Germany
| | - Thomas Fleming
- Department of Internal Medicine I and Clinical Chemistry, University Hospital Heidelberg, Heidelberg 69120, Germany; German Center for Diabetes Research (DZD), Neuherberg 85764, Germany
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Hasan N, Kamruzzaman M, Islam S, Hoque H, Bhuiyan FH, Prodhan SH. Development of partial abiotic stress tolerant Citrus reticulata Blanco and Citrus sinensis (L.) Osbeck through Agrobacterium-mediated transformation method. J Genet Eng Biotechnol 2019; 17:14. [PMID: 31840208 PMCID: PMC6911817 DOI: 10.1186/s43141-019-0014-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/24/2019] [Indexed: 12/03/2022]
Abstract
BACKGROUND Recent studies indicate that farmers are facing several challenges due to biotic and abiotic stresses like diseases, drought, cold, and soil salinity which are causing declined Citrus production. Thus, it is essential to improve these varieties which would be resistant against biotic and abiotic stresses as well as high yielding. The transformation of abiotic stress tolerant genes in Citrus species is essential for using areas affected by abiotic stresses. This study was aimed to improve resistance of Citrus reticulata Blanco and Citrus sinensis (L.) Osbeck to abiotic stresses by transferring PsCBL and PsCIPK genes through Agrobacterium-mediated transformation. RESULTS Abiotic stress tolerant PsCBL and PsCIPK genes isolated from Pisum sativum were transformed into two Citrus species, Citrus reticulata Blanco and Citrus sinensis (L.) Osbeck, through Agrobacterium-mediated transformation method. Mature seed-derived calli of two Species were infected with Agrobacterium tumefaciens LBA4404 harboring PsCBL and PsCIPK genes. The infected calli were co-cultured in dark condition and later on washed with antibiotic solution and transferred to selection medium. Preliminary resistant calli were recovered and regenerated to plantlets. Maximum regeneration rate was 61.11 ± 1.35% and 55.55 ± 1.03%, respectively. The genetic transformation was confirmed by performing β glucuronidase (GUS) assays and subsequent PCR amplification of the GUS gene. The transformation rates of the two cultivated species were higher than previous reports. Maximum transformation frequencies were found when bacterial OD600 was 0.5 and concentration of acetosyringone was 150 μM. In-vitro evaluation of drought and salt tolerance of transgenic plantlets were done, and transgenic plantlets showed better performance than the control plants. CONCLUSIONS The present study demonstrates that transformation of Citrus plants with PsCBL and PsCIPK genes result in improved abiotic stress tolerance.
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Affiliation(s)
- Nazmul Hasan
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, 3114 Bangladesh
| | - Mohammad Kamruzzaman
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, 3114 Bangladesh
| | - Shariful Islam
- Department of Molecular Biology and Genetic Engineering, Sylhet Agricultural University, Sylhet, 3100 Bangladesh
| | - Hammadul Hoque
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, 3114 Bangladesh
| | - Fahmid Hossain Bhuiyan
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, 3114 Bangladesh
| | - Shamsul H. Prodhan
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, 3114 Bangladesh
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Patra SK, Samaddar S, Sinha N, Ghosh S. Reactive nitrogen species induced catalases promote a novel nitrosative stress tolerance mechanism in Vibrio cholerae. Nitric Oxide 2019; 88:35-44. [PMID: 30981896 DOI: 10.1016/j.niox.2019.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 03/04/2019] [Accepted: 04/09/2019] [Indexed: 11/18/2022]
Abstract
Vibrio cholerae faces nitrosative stress during successful colonization in intestine. Very little information is available on the nitrosative stress protective mechanisms of V. cholerae. Reports show that NorR regulon control two genes hmpA and nnrS responsible for nitric oxide (NO) detoxification in V. cholerae. In the present study we first time report a novel role of V. cholerae catalases under nitrosative stress. Using zymogram analysis of catalase we showed that KatB and KatG activity were induced within 30 min in V. cholerae in the presence of sodium nitroprusside (SNP), a NO donor compound. Surprisingly, V. cholerae cell survival was found to be decreased under nitrosative stress if catalase activities were blocked by ATz, a catalase inhibitor. Flow cytometry study was conducted to detect reactive oxygen species (ROS) and reactive nitrogen species (RNS) using DHE and DHR123, fluorescent probes respectively. Short exposure of SNP to V. cholerae did not generate ROS but RNS was detectable within 30 min. Total glutathione content was increased in V. cholerae cells under nitrosative stress. Furthermore, Superoxide dismutase (SOD) and Glutathione reductase (GR) activities remained unchanged under nitrosative stress in V. cholerae indicated antioxidant role of NO which could produce peroxynitrite. To investigate the role of catalase induction under nitrosative stress in V. cholerae, we conducted peroxynitrite reductase assay using cell lysates. Interestingly, SNP treated V. cholerae cell lysates showed lowest DHR123 oxidation compared to the control set. The extent of DHR123 oxidation was more in V. cholerae cell lysate when catalases were blocked by ATz.
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Affiliation(s)
- Sourav Kumar Patra
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Sourabh Samaddar
- Bose Institute, P-1/12, CIT Road Scheme VIIM, Kolkata, 700 054, West Bengal, India
| | - Nilanjan Sinha
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Sanjay Ghosh
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, West Bengal, India.
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Kosmachevskaya OV, Shumaev KB, Topunov AF. Carbonyl Stress in Bacteria: Causes and Consequences. BIOCHEMISTRY (MOSCOW) 2016; 80:1655-71. [PMID: 26878572 DOI: 10.1134/s0006297915130039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Pathways of synthesis of the α-reactive carbonyl compound methylglyoxal (MG) in prokaryotes are described in this review. Accumulation of MG leads to development of carbonyl stress. Some pathways of MG formation are similar for both pro- and eukaryotes, but there are reactions specific for prokaryotes, e.g. the methylglyoxal synthase reaction. This reaction and the glyoxalase system constitute an alternative pathway of glucose catabolism - the MG shunt not associated with the synthesis of ATP. In violation of the regulation of metabolism, the cell uses MG shunt as well as other glycolysis shunting pathways and futile cycles enabling stabilization of its energetic status. MG was first examined as a biologically active metabolic factor participating in the formation of phenotypic polymorphism and hyperpersistent potential of bacterial populations. The study of carbonyl stress is interesting for evolutionary biology and can be useful for constructing highly effective producer strains.
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Affiliation(s)
- O V Kosmachevskaya
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, 119071, Russia.
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Panja C, Ghosh S. Detection of in vivo protein tyrosine nitration in petite mutant of Saccharomyces cerevisiae: consequence of its formation and significance. Biochem Biophys Res Commun 2014; 451:529-34. [PMID: 25111815 DOI: 10.1016/j.bbrc.2014.08.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 08/02/2014] [Indexed: 10/24/2022]
Abstract
Protein tyrosine nitration (PTN) is a selective post-translational modification often associated with physiological and pathophysiological conditions. Tyrosine is modified in the 3-position of the phenolic ring through the addition of a nitro group. In our previous study we first time showed that PTN occurs in vivo in Saccharomyces cerevisiae. In the present study we observed occurrence of PTN in petite mutant of S. cerevisiae which indicated that PTN is not absolutely dependent on functional mitochondria. Nitration of proteins in S. cerevisiae was also first time confirmed in immunohistochemical study using spheroplasts. Using proteosomal mutants Rpn10Δ, Pre9Δ, we first time showed that the fate of protein nitration in S. cerevisiae was not dependent on proteosomal clearing and probably played vital role in modulating signaling cascades. From our study it is evident that protein tyrosine nitration is a normal physiological event of S. cerevisiae.
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Affiliation(s)
- Chiranjit Panja
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700 019, West Bengal, India
| | - Sanjay Ghosh
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700 019, West Bengal, India.
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Errafiy N, Ammar E, Soukri A. Protective effect of some essential oils against oxidative and nitrosative stress onTetrahymena thermophilagrowth. JOURNAL OF ESSENTIAL OIL RESEARCH 2013. [DOI: 10.1080/10412905.2013.775681] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Lushchak OV, Lushchak VI. Sodium nitroprusside induces mild oxidative stress inSaccharomyces cerevisiae. Redox Rep 2013; 13:144-52. [DOI: 10.1179/135100008x308885] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Majumdar U, Biswas P, Subhra Sarkar T, Maiti D, Ghosh S. Regulation of cell cycle and stress responses under nitrosative stress in Schizosaccharomyces pombe. Free Radic Biol Med 2012; 52:2186-200. [PMID: 22561704 DOI: 10.1016/j.freeradbiomed.2012.03.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/13/2012] [Accepted: 03/30/2012] [Indexed: 02/07/2023]
Abstract
Nitric oxide (NO) acts as a signaling molecule in numerous physiological processes but excess production generates nitrosative stress in cells. The exact protective mechanism used by cells to combat nitrosative stress is unclear. In this study, the fission yeast Schizosaccharomyces pombe has been used as a model system to explore cell cycle regulation and stress responses under nitrosative stress. Exposure to an NO donor results in mitotic delay in cells through G2/M checkpoint activation and initiates rereplication. Western blot analysis of phosphorylated Cdc2 revealed that the G2/M block in the cell cycle was due to retention of its inactive phosphorylated form. Interestingly, nitrosative stress results in inactivation of Cdc25 through S-nitrosylation that actually leads to cell cycle delay. From differential display analysis, we identified plo1, spn4, and rga5, three cell cycle-related genes found to be differentially expressed under nitrosative stress. Exposure to nitrosative stress also results in abnormal septation and cytokinesis in S. pombe. In summary we propose a novel molecular mechanism of cell cycle control under nitrosative stress based on our experimental results and bioinformatics analysis.
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Affiliation(s)
- Uddalak Majumdar
- Department of Biochemistry, University College of Science, Calcutta University, Kolkata 700019, West Bengal, India
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Park MS, Kim HJ, Park AR, Ahn K, Lim HW, Lim CJ. Pap1p-dependent upregulation of thioredoxin 3 and thioredoxin reductase genes from the fission yeast under nitrosative stress. Can J Microbiol 2012; 58:206-11. [DOI: 10.1139/w11-125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Min-Sik Park
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, Korea
| | - Hyeon-Jung Kim
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, Korea
| | - A Rum Park
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, Korea
| | - Kisup Ahn
- Department of Health and Environment, Baekseok Culture University, Cheonan 330-705, Korea
| | - Hye-Won Lim
- Shebah Biotech Inc., Chuncheon Biotechnology Foundation, Hi-Tech Venture Town, Chuncheon 200-161, Korea
| | - Chang-Jin Lim
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, Korea
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Abstract
The opportunistic human fungal pathogen Candida albicans encounters diverse environmental stresses when it is in contact with its host. When colonizing and invading human tissues, C. albicans is exposed to ROS (reactive oxygen species) and RNIs (reactive nitrogen intermediates). ROS and RNIs are generated in the first line of host defence by phagocytic cells such as macrophages and neutrophils. In order to escape these host-induced oxidative and nitrosative stresses, C. albicans has developed various detoxification mechanisms. One such mechanism is the detoxification of NO (nitric oxide) to nitrate by the flavohaemoglobin enzyme CaYhb1. Members of the haemoglobin superfamily are highly conserved and are found in archaea, eukaryotes and bacteria. Flavohaemoglobins have a dioxygenase activity [NOD (NO dioxygenase domain)] and contain three domains: a globin domain, an FAD-binding domain and an NAD(P)-binding domain. In the present paper, we examine the nitrosative stress response in three fungal models: the pathogenic yeast C. albicans, the benign budding yeast Saccharomyces cerevisiae and the benign fission yeast Schizosaccharomyces pombe. We compare their enzymatic and non-enzymatic NO and RNI detoxification mechanisms and summarize fungal responses to nitrosative stress.
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In vivo protein tyrosine nitration in S. cerevisiae: Identification of tyrosine-nitrated proteins in mitochondria. Biochem Biophys Res Commun 2009; 388:612-7. [DOI: 10.1016/j.bbrc.2009.08.077] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Accepted: 08/13/2009] [Indexed: 11/17/2022]
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Kumagai T, Nangaku M, Kojima I, Nagai R, Ingelfinger JR, Miyata T, Fujita T, Inagi R. Glyoxalase I overexpression ameliorates renal ischemia-reperfusion injury in rats. Am J Physiol Renal Physiol 2009; 296:F912-21. [PMID: 19211689 DOI: 10.1152/ajprenal.90575.2008] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Methylglyoxal (MG), a highly reactive carbonyl compound generated by carbohydrate oxidation and glycolysis, is the major precursor of protein glycation and induces cytotoxicity leading to apoptosis. Although recent studies have emphasized that MG accumulates in not only chronic oxidative stress-related diseases but also acute hypoxic conditions, the pathogenic contribution of MG in acute diseases is unclear. MG is efficiently metabolized by the glyoxalase system, namely, glyoxalase I. We investigated the pathophysiological role of glyoxalase I as an MG detoxifier in rat renal ischemia-reperfusion (I/R) injury. I/R-induced tubulointerstitial injury was associated with a deterioration in renal glyoxalase I activity independent of its cofactor, GSH, as well as an increase in renal MG level. In in vitro studies, knockdown of glyoxalase I by small interference RNA transfection in rat tubular cells exacerbated cell death by hypoxia-reoxygenation compared with control cells. We also examined whether glyoxalase I overexpression prevented renal I/R damage in rats overexpressing human glyoxalase I with enzyme activity in the kidney 17-fold higher than in wild-type. The histological and functional manifestations of I/R in these rats were significantly ameliorated in association with a decrease in intracellular MG adduct accumulation, oxidative stress, and tubular cell apoptosis. In conclusion, glyoxalase I exerts renoprotective effects in renal I/R injury via a reduction in MG accumulation in tubular cells.
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Affiliation(s)
- Takanori Kumagai
- Div. of Nephrology and Endocrinology, Univ. of Tokyo School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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Almeida B, Buttner S, Ohlmeier S, Silva A, Mesquita A, Sampaio-Marques B, Osório NS, Kollau A, Mayer B, Leão C, Laranjinha J, Rodrigues F, Madeo F, Ludovico P. NO-mediated apoptosis in yeast. J Cell Sci 2007; 120:3279-88. [PMID: 17726063 DOI: 10.1242/jcs.010926] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Nitric oxide (NO) is a small molecule with distinct roles in diverse physiological functions in biological systems, among them the control of the apoptotic signalling cascade. By combining proteomic, genetic and biochemical approaches we demonstrate that NO and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) are crucial mediators of yeast apoptosis. Using indirect methodologies and a NO-selective electrode, we present results showing that H2O2-induced apoptotic cells synthesize NO that is associated to a nitric oxide synthase (NOS)-like activity as demonstrated by the use of a classical NOS kit assay. Additionally, our results show that yeast GAPDH is a target of extensive proteolysis upon H2O2-induced apoptosis and undergoes S-nitrosation. Blockage of NO synthesis with Nomega-nitro-L-arginine methyl ester leads to a decrease of GAPDH S-nitrosation and of intracellular reactive oxygen species (ROS) accumulation, increasing survival. These results indicate that NO signalling and GAPDH S-nitrosation are linked with H2O2-induced apoptotic cell death. Evidence is presented showing that NO and GAPDH S-nitrosation also mediate cell death during chronological life span pointing to a physiological role of NO in yeast apoptosis.
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Affiliation(s)
- Bruno Almeida
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Sahoo R, Dutta T, Das A, Sinha Ray S, Sengupta R, Ghosh S. Effect of nitrosative stress on Schizosaccharomyces pombe: inactivation of glutathione reductase by peroxynitrite. Free Radic Biol Med 2006; 40:625-31. [PMID: 16458193 DOI: 10.1016/j.freeradbiomed.2005.09.029] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2005] [Revised: 08/23/2005] [Accepted: 09/12/2005] [Indexed: 11/26/2022]
Abstract
Oxidative stress has been shown to alter cellular redox status in various cell types. Changes in expressions of several antioxidative and antistress-responsive genes along with activation or inactivation of various proteins were also reported during oxidative insult as well as during nitrosative stress. In the present study, we show the effect of nitrosative stress on cellular redox status of fission yeast Schizosaccharomyces pombe. This is the first report of S-nitrosoglutathione (GSNO) reductase activity in S. pombe and its inactivation by GSNO. We also show the inactivation of glutathione reductase (GR) and glutathione peroxidase in the presence of various reactive nitrogen species in vivo. In addition, we first observe the inactivation of GR by peroxynitrite in vivo using S. pombe cells and also similar observations under in vitro conditions. An immunoreactive band against monoclonal anti-3-nitrotyrosine antibody confirms the modification of GR under in vitro conditions. We also show the effect of nitrosative stress on Deltapap1 cells of S. pombe, which are more sensitive to nitrosative stress, indicating the involvement of Pap1 in the protection against nitrosative stress. Finally, exposure of S. pombe cells to reactive nitrogen species reveals an important role of cellular thiol pool in protection against nitrosative stress.
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Affiliation(s)
- Rupam Sahoo
- Department of Biochemistry, Calcutta University, 35, Ballygunge Circular Road, Kolkata-700 019, India
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Current awareness on yeast. Yeast 2003; 20:1007-14. [PMID: 14587515 DOI: 10.1002/yea.948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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