1
|
Torres-Velarde JM, Allen KN, Salvador-Pascual A, Leija RG, Luong D, Moreno-Santillán DD, Ensminger DC, Vázquez-Medina JP. Peroxiredoxin 6 suppresses ferroptosis in lung endothelial cells. Free Radic Biol Med 2024; 218:82-93. [PMID: 38579937 PMCID: PMC11177496 DOI: 10.1016/j.freeradbiomed.2024.04.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/26/2024] [Accepted: 04/02/2024] [Indexed: 04/07/2024]
Abstract
Peroxiredoxin 6 (Prdx6) repairs peroxidized membranes by reducing oxidized phospholipids, and by replacing oxidized sn-2 fatty acyl groups through hydrolysis/reacylation by its phospholipase A2 (aiPLA2) and lysophosphatidylcholine acyltransferase activities. Prdx6 is highly expressed in the lung, and intact lungs and cells null for Prdx6 or with single-point mutations that inactivate either Prdx6-peroxidase or aiPLA2 activity alone exhibit decreased viability, increased lipid peroxidation, and incomplete repair when exposed to paraquat, hyperoxia, or organic peroxides. Ferroptosis is form of cell death driven by the accumulation of phospholipid hydroperoxides. We studied the role of Prdx6 as a ferroptosis suppressor in the lung. We first compared the expression Prdx6 and glutathione peroxidase 4 (GPx4) and visualized Prdx6 and GPx4 within the lung. Lung Prdx6 mRNA levels were five times higher than GPx4 levels. Both Prdx6 and GPx4 localized to epithelial and endothelial cells. Prdx6 knockout or knockdown sensitized lung endothelial cells to erastin-induced ferroptosis. Cells with genetic inactivation of either aiPLA2 or Prdx6-peroxidase were more sensitive to ferroptosis than WT cells, but less sensitive than KO cells. We then conducted RNA-seq analyses in Prdx6-depleted cells to further explore how the loss of Prdx6 sensitizes lung endothelial cells to ferroptosis. Prdx6 KD upregulated transcriptional signatures associated with selenoamino acid metabolism and mitochondrial function. Accordingly, Prdx6 deficiency blunted mitochondrial function and increased GPx4 abundance whereas GPx4 KD had the opposite effect on Prdx6. Moreover, we detected Prdx6 and GPx4 interactions in intact cells, suggesting that both enzymes cooperate to suppress lipid peroxidation. Notably, Prdx6-depleted cells remained sensitive to erastin-induced ferroptosis despite the compensatory increase in GPx4. These results show that Prdx6 suppresses ferroptosis in lung endothelial cells and that both aiPLA2 and Prdx6-peroxidase contribute to this effect. These results also show that Prdx6 supports mitochondrial function and modulates several coordinated cytoprotective pathways in the pulmonary endothelium.
Collapse
Affiliation(s)
| | - Kaitlin N Allen
- Department of Integrative Biology, University of California, Berkeley, USA
| | | | - Roberto G Leija
- Department of Integrative Biology, University of California, Berkeley, USA
| | - Diamond Luong
- Department of Integrative Biology, University of California, Berkeley, USA
| | | | - David C Ensminger
- Department of Integrative Biology, University of California, Berkeley, USA
| | | |
Collapse
|
2
|
Rahaman H, Herojit K, Singh LR, Haobam R, Fisher AB. Structural and Functional Diversity of the Peroxiredoxin 6 Enzyme Family. Antioxid Redox Signal 2024; 40:759-775. [PMID: 37463006 DOI: 10.1089/ars.2023.0287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Significance: Peroxiredoxins (Prdxs) with a single peroxidative cysteine (CP) in a conserved motif PXXX(T/S)XXCP within its thioredoxin fold, have been classified as the peroxiredoxin 6 (Prdx6 ) family. All Prdxs can reduce H2O2 and short chain hydroperoxides while Prdx6 in addition, can reduce phospholipid hydroperoxides (PLOOH) due to its ability to interact with peroxidized phospholipid substrate. The single CP of Prdx6 uses various external electron donors including glutathione thioredoxin, and ascorbic acid for resolution of its peroxidized state and, therefore, its peroxidase activity. Prdx6 proteins also exhibit Ca2+-independent phospholipase A2 (PLA2), lysophosphatidylcholine acyltransferase (LPCAT), and chaperone activities that depend on cellular localization and the oxidation and oligomerisation states of the protein. Thus, Prdx6 is a "moonlighting" enzyme. Recent Advance: Physiologically, Prdx6s have been reported to play an important role in protection against oxidative stress, repair of peroxidized cell membranes, mammalian lung surfactant turnover, activation of some NADPH oxidases, the regulation of seed germination in plants, as an indicator of cellular levels of reactive O2 species through Nrf-Klf9 activation, and possibly in male fertility, regulation of cell death through ferroptosis, cancer metastasis, and oxidative stress-related signalling pathways. Critical Issues: This review outlines Prdx6 enzyme unique structural features and explores its wide range of physiological functions. Yet, existing structural data falls short of fully revealing all of human Prdx6 multifunctional roles. Further endeavour is required to bridge this gap in its understanding. Although there are wide variations in both the structure and function of Prdx6 family members in various organisms, all Prdx6 proteins show the unique a long C-terminal extension that is also seen in Prdx1, but not in other Prdxs. Future Directions: As research data continues to accumulate, the potential for detailed insights into the role of C-terminal of Prdx6 in its oligomerisation and activities. There is a need for thorough exploration of structural characteristics of the various biological functions. Additionally, uncovering the interacting partners of Prdx6 and understanding its involvement in signalling pathways will significantly contribute to a more profound comprehension of its role.
Collapse
Affiliation(s)
- Hamidur Rahaman
- Department of Biotechnology, Manipur University, Imphal, India
| | - Khundrakpam Herojit
- Department of Biotechnology, Manipur University, Imphal, India
- Department of Biotechnology, Mangolnganbi College, Ningthoukhong, India
| | | | - Reena Haobam
- Department of Biotechnology, Manipur University, Imphal, India
| | - Aron B Fisher
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| |
Collapse
|
3
|
Cheng C, Liu K, Shen F, Zhang J, Xie Y, Li S, Hou Y, Bai G. Astragaloside IV targets PRDX6, inhibits the activation of RAC subunit in NADPH oxidase 2 for oxidative damage. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 114:154795. [PMID: 37030053 DOI: 10.1016/j.phymed.2023.154795] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/14/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Radix Astragali Mongolici, as a traditional Chinese medicine, is widely used in the treatment of qi deficiency, viral or bacterial infection, inflammation and cancer. Astragaloside IV (AST), a key active compound in Radix Astragali Mongolici, has been shown to reduce disease progression by inhibiting oxidative stress and inflammation. However, the specific target and mechanism of action of AST in improving oxidative stress are still unclear. PURPOSE This study aims to explore the target and mechanism of AST to improve oxidative stress, and to explain the biological process of oxidative stress. METHODS AST functional probes were designed to capture target proteins and combined with protein spectrum to analyze target proteins. Small molecule and protein interaction technologies were used to verify the mode of action, while computer dynamics simulation technology was used to analyze the site of interaction with the target protein. The pharmacological activity of AST in improving oxidative stress was evaluated in a mouse model of acute lung injury induced by LPS. Additionally, pharmacological and serial molecular biological approaches were used to explore the underlying mechanism of action. RESULTS AST inhibits PLA2 activity in PRDX6 by targeting the PLA2 catalytic triad pocket. This binding alters the conformation and structural stability of PRDX6 and interferes with the interaction between PRDX6 and RAC, hindering the activation of the RAC-GDI heterodimer. Inactivation of RAC prevents NOX2 maturation, attenuates superoxide anion production, and improves oxidative stress damage. CONCLUSION The findings of this research indicate that AST impedes PLA2 activity by acting on the catalytic triad of PRDX6. This, in turn, disrupts the interaction between PRDX6 and RAC, thereby hindering the maturation of NOX2 and diminishing the oxidative stress damage.
Collapse
Affiliation(s)
- Chuanjing Cheng
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China
| | - Kaixin Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China
| | - Fukui Shen
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China
| | - Jinling Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China
| | - Yang Xie
- The Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450000, China
| | - Suyun Li
- The Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450000, China; Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases co-constructed by Henan province & Education Ministry of P.R., China, Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Yuanyuan Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China.
| | - Gang Bai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China.
| |
Collapse
|
4
|
Fujii J, Yamada KI. Defense systems to avoid ferroptosis caused by lipid peroxidation-mediated membrane damage. Free Radic Res 2023; 57:353-372. [PMID: 37551716 DOI: 10.1080/10715762.2023.2244155] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/09/2023]
Abstract
The presence of hydrogen peroxide along with ferrous iron produces hydroxyl radicals that preferably oxidize polyunsaturated fatty acids (PUFA) to alkyl radicals (L•). The reaction of L• with an oxygen molecule produces lipid peroxyl radical (LOO•) that collectively trigger chain reactions, which results in the accumulation of lipid peroxidation products (LOOH). Oxygenase enzymes, such as lipoxygenase, also stimulate the peroxidation of PUFA. The production of phospholipid hydroperoxides (P-LOOH) can result in the destruction of the architecture of cell membranes and ultimate cell death. This iron-dependent regulated cell death is generally referred to as ferroptosis. Radical scavengers, which include tocopherol and nitric oxide (•NO), react with lipid radicals and terminate the chain reaction. When tocopherol reductively detoxifies lipid radicals, the resultant tocopherol radicals are recycled via reduction by coenzyme Q or ascorbate. CoQ radicals are reduced back by the anti-ferroptotic enzyme FSP1. •NO reacts with lipid radicals and produces less reactive nitroso compounds. The resulting P-LOOH is reductively detoxified by the action of glutathione peroxidase 4 (GPX4) or peroxiredoxin 6 (PRDX6). The hydrolytic removal of LOOH from P-LOOH by calcium-independent phospholipase A2 leads the preservation of membrane structure. While the expression of such protective genes or the presence of these anti-oxidant compounds serve to maintain a healthy condition, tumor cells employ them to make themselves resistant to anti-tumor treatments. Thus, these defense mechanisms against ferroptosis are protective in ordinary cells but are also potential targets for cancer treatment.
Collapse
Affiliation(s)
- Junichi Fujii
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Ken-Ichi Yamada
- Faculty of Pharmaceutical Sciences, Physical Chemistry for Life Science Laboratory, Kyushu University, Fukuoka, Japan
| |
Collapse
|
5
|
Lang L, Wolf AC, Riedel M, Thibol L, Geissel F, Feld K, Zimmermann J, Morgan B, Manolikakes G, Deponte M. Substrate Promiscuity and Hyperoxidation Susceptibility as Potential Driving Forces for the Co-evolution of Prx5-Type and Prx6-Type 1-Cys Peroxiredoxin Mechanisms. ACS Catal 2023. [DOI: 10.1021/acscatal.2c04896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Affiliation(s)
- Lukas Lang
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Ann-Cathrin Wolf
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Mareike Riedel
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Lea Thibol
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Fabian Geissel
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Kristina Feld
- Department of Parasitology, Ruprecht-Karls University, D-69120 Heidelberg, Germany
| | - Jannik Zimmermann
- Institute of Biochemistry, Centre for Human and Molecular Biology (ZHMB), Saarland University, D-66123 Saarbrücken, Germany
| | - Bruce Morgan
- Institute of Biochemistry, Centre for Human and Molecular Biology (ZHMB), Saarland University, D-66123 Saarbrücken, Germany
| | - Georg Manolikakes
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| | - Marcel Deponte
- Faculty of Chemistry, TU Kaiserslautern, D-67663 Kaiserslautern, Germany
| |
Collapse
|
6
|
Sharapov MG, Goncharov RG, Parfenyuk SB, Glushkova OV, Novoselov VI. The Role of Phospholipase Activity of Peroxiredoxin 6 in Its Transmembrane Transport and Protective Properties. Int J Mol Sci 2022; 23:ijms232315265. [PMID: 36499590 PMCID: PMC9738660 DOI: 10.3390/ijms232315265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/24/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Peroxiredoxin 6 (Prdx6) is a multifunctional eukaryotic antioxidant enzyme. Mammalian Prdx6 possesses peroxidase activity against a wide range of organic and inorganic hydroperoxides, as well as exhibits phospholipase A2 (aiPLA2) activity, which plays an important role in the reduction of oxidized phospholipids and cell membrane remodeling. Exogenous Prdx6 has recently been shown to be able to penetrate inside the cell. We hypothesized that this entry may be due to the phospholipase activity of Prdx6. Experiments using exogenous Prdx6 in three cell lines (3T3, A549, RAW 264.7) demonstrated that it is the phospholipase activity that promotes its penetration into the cell. Overoxidation of Prdx6 led to a suppression of the peroxidase activity and a 3-to-4-fold growth of aiPLA2, which enhanced the efficiency of its transmembrane transport into the cells by up to 15 times. A mutant form of Prdx6-S32A with an inactivated phospholipase center turned out to be unable to enter the cells in both the reduced and oxidized state of the peroxidase active center. Previously, we have shown that exogenous Prdx6 has a significant radioprotective action. However, the role of phospholipase activity in the radioprotective effects of Prdx6 remained unstudied. Trials with the mutant Prdx6-S32A form, with the use of a total irradiation model in mice, showed a nearly 50% reduction of the radioprotective effect upon aiPLA2 loss. Such a significant decrease in the radioprotective action may be due to the inability of Prdx6-S32A to penetrate animal cells, which prevents its reduction by the natural intracellular reducing agent glutathione S-transferase (πGST) and lowers the efficiency of elimination of peroxides formed from the effect of ionizing radiation. Thus, phospholipase activity may play an important role in the reduction of oxidized Prdx6 and manifestation of its antioxidant properties.
Collapse
|
7
|
Paluchova V, Cajka T, Durand T, Vigor C, Dodia C, Chatterjee S, Fisher AB, Kuda O. The role of peroxiredoxin 6 in biosynthesis of FAHFAs. Free Radic Biol Med 2022; 193:787-794. [PMID: 36403738 DOI: 10.1016/j.freeradbiomed.2022.11.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/09/2022] [Indexed: 11/20/2022]
Abstract
Peroxiredoxin 6 (Prdx6) is a multifunctional enzyme, a unique member of the peroxiredoxin family, with an important role in antioxidant defense. Moreover, it has also been linked with the biosynthesis of anti-inflammatory and anti-diabetic lipids called fatty acid esters of hydroxy fatty acids (FAHFAs) and many diseases, including cancer, inflammation, and metabolic disorders. Here, we performed metabolomic and lipidomic profiling of subcutaneous adipose tissue from mouse models with genetically modified Prdx6. Deletion of Prdx6 resulted in reduced levels of FAHFAs containing 13-hydroxylinoleic acid (13-HLA). Mutation of Prdx6 C47S impaired the glutathione peroxidase activity and reduced FAHFA levels, while D140A mutation, responsible for phospholipase A2 activity, showed only minor effects. Targeted analysis of oxidized phospholipids and triacylglycerols in adipocytes highlighted a correlation between FAHFA and hydroxy fatty acid production by Prdx6 or glutathione peroxidase 4. FAHFA regioisomer abundance was negatively affected by the Prdx6 deletion, and this effect was more pronounced in longer and more unsaturated FAHFAs. The predicted protein model of Prdx6 suggested that the monomer-dimer transition mechanism might be involved in the repair of longer-chain peroxidized phospholipids bound over two monomers and that the role of Prdx6 in FAHFA synthesis might be restricted to branching positions further from carbon 9. In conclusion, our work linked the peroxidase activity of Prdx6 with the levels of FAHFAs in adipose tissue.
Collapse
Affiliation(s)
- Veronika Paluchova
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220, Prague 4, Czech Republic; First Faculty of Medicine, Charles University, Katerinska 32, Prague, 12108, Czech Republic
| | - Tomas Cajka
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220, Prague 4, Czech Republic
| | - Thierry Durand
- Institut des Biomolecules Max Mousseron, CNRS, ENSCM, University Montpellier, 34093, Montpellier, France
| | - Claire Vigor
- Institut des Biomolecules Max Mousseron, CNRS, ENSCM, University Montpellier, 34093, Montpellier, France
| | - Chandra Dodia
- Institute for Environmental Medicine of the Department of Physiology, University of Pennsylvania, 3620 Hamilton Walk, 1 John Morgan Building, USA
| | - Shampa Chatterjee
- Institute for Environmental Medicine of the Department of Physiology, University of Pennsylvania, 3620 Hamilton Walk, 1 John Morgan Building, USA
| | - Aron B Fisher
- Institute for Environmental Medicine of the Department of Physiology, University of Pennsylvania, 3620 Hamilton Walk, 1 John Morgan Building, USA
| | - Ondrej Kuda
- Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220, Prague 4, Czech Republic.
| |
Collapse
|
8
|
Gupta DN, Dalal V, Savita BK, Alam MS, Singh A, Gubyad M, Ghosh DK, Kumar P, Sharma AK. Biochemical characterization and structure-based in silico screening of potent inhibitor molecules against the 1 cys peroxiredoxin of bacterioferritin comigratory protein family from Candidatus Liberibacter asiaticus. J Biomol Struct Dyn 2022:1-13. [DOI: 10.1080/07391102.2022.2096118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Deena Nath Gupta
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Vikram Dalal
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Brajesh Kumar Savita
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Md Shahid Alam
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Anamika Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Mrugendra Gubyad
- Plant Virology Laboratory, ICAR-Central Citrus Research Institute, Kachimet, Nagpur, India
| | - Dilip Kumar Ghosh
- Plant Virology Laboratory, ICAR-Central Citrus Research Institute, Kachimet, Nagpur, India
| | - Pravindra Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Ashwani Kumar Sharma
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| |
Collapse
|
9
|
Basis for using thioredoxin as an electron donor by Schizosaccharomyces pombe Gpx1 and Tpx1. AMB Express 2022; 12:41. [PMID: 35403927 PMCID: PMC9001804 DOI: 10.1186/s13568-022-01381-2] [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: 02/12/2022] [Accepted: 03/29/2022] [Indexed: 11/22/2022] Open
Abstract
Glutathione (GSH) peroxidases (GPxs or GSHPx) and thioredoxin (Trx) peroxidases (TPxs) are two classes of peroxidases that catalyze the reduction of peroxides. GPxs and TPxs generally use GSH or Trx, respectively, to recycle the oxidized cysteine (Cys) residue in the protein. However, it is unclear why unlike human GPxs, the Schizosaccharomyces pombe Gpx1 (spGpx1) prefers Trx over GSH for recycling of the active-site peroxidatic Cys residue. Here, we compared spGpx1 and S. pombe Tpx1 (spTpx1) protein sequences with those of their respective homologs in Saccharomyces cerevisiae and humans. Our analysis revealed that like spTpx1, spGpx1 contains a pair of conserved Cys residues (Cys36 and Cys82). These two conserved Cys residues are named peroxidatic and resolving Cys residues, respectively, and are found only in GPxs and TPxs that prefer Trx as an electron donor. Our analysis suggested that Cys36 and Cys82 in spGpx1 are most likely to form a disulfide bond upon oxidation of Cys36. Molecular modelling predicted that a conformational change might be required for the formation of this disulfide bond. Evolutionary analysis suggested that fungal GPxs and TPxs are related by divergent evolution from a common ancestor. Our analyses support a prediction that while spGpx1 and spTpx1 are phylogenetically and functionally different, they evolved from a common ancestor and use a similar mechanism for recycling of the active-site peroxidatic Cys residue. spGpx1 contains two conserved Cys residues (Cys36 and Cys82), which may form a disulfide bond upon oxidation and the reduction of this disulfide bond is most likely to be mediated by Trx in vivo. Fungal GPxs and TPxs evolved from a common ancestor.
Collapse
|
10
|
Kovalyova Y, Bak DW, Gordon EM, Fung C, Shuman JHB, Cover TL, Amieva MR, Weerapana E, Hatzios SK. An infection-induced oxidation site regulates legumain processing and tumor growth. Nat Chem Biol 2022; 18:698-705. [PMID: 35332331 PMCID: PMC9246868 DOI: 10.1038/s41589-022-00992-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 02/08/2022] [Indexed: 11/15/2022]
Abstract
Oxidative stress is a defining feature of most cancers, including those that stem from carcinogenic infections1. Reactive oxygen species (ROS) can drive tumor formation2–4, yet the molecular oxidation events that contribute to tumorigenesis are largely unknown. Here we show that inactivation of a single, redox-sensitive cysteine in the host protease legumain, which is oxidized during infection with the gastric cancer-causing bacterium Helicobacter pylori, accelerates tumor growth. By using chemical proteomics to map cysteine reactivity in human gastric cells, we determined that H. pylori infection induces oxidation of legumain at Cys219. Legumain oxidation dysregulates intracellular legumain processing and decreases the activity of the enzyme in H. pylori-infected cells. We further show that the site-specific loss of Cys219 reactivity increases tumor growth and mortality in a xenograft model. Our findings establish a link between an infection-induced oxidation site and tumorigenesis while underscoring the importance of cysteine reactivity in tumor growth.
Collapse
Affiliation(s)
- Yekaterina Kovalyova
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA.,Microbial Sciences Institute, Yale University, West Haven, CT, USA.,Department of Chemistry, Yale University, New Haven, CT, USA
| | - Daniel W Bak
- Department of Chemistry, Boston College, Chestnut Hill, MA, USA
| | - Elizabeth M Gordon
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA.,Microbial Sciences Institute, Yale University, West Haven, CT, USA
| | - Connie Fung
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, USA
| | - Jennifer H B Shuman
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN, USA
| | - Timothy L Cover
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN, USA.,Department of Medicine, Vanderbilt University School of Medicine, and Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN, USA
| | - Manuel R Amieva
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, USA.,Department of Pediatrics, Division of Infectious Diseases, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Stavroula K Hatzios
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA. .,Microbial Sciences Institute, Yale University, West Haven, CT, USA. .,Department of Chemistry, Yale University, New Haven, CT, USA.
| |
Collapse
|
11
|
Superoxide Radicals in the Execution of Cell Death. Antioxidants (Basel) 2022; 11:antiox11030501. [PMID: 35326151 PMCID: PMC8944419 DOI: 10.3390/antiox11030501] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 12/24/2022] Open
Abstract
Superoxide is a primary oxygen radical that is produced when an oxygen molecule receives one electron. Superoxide dismutase (SOD) plays a primary role in the cellular defense against an oxidative insult by ROS. However, the resulting hydrogen peroxide is still reactive and, in the presence of free ferrous iron, may produce hydroxyl radicals and exacerbate diseases. Polyunsaturated fatty acids are the preferred target of hydroxyl radicals. Ferroptosis, a type of necrotic cell death induced by lipid peroxides in the presence of free iron, has attracted considerable interest because of its role in the pathogenesis of many diseases. Radical electrons, namely those released from mitochondrial electron transfer complexes, and those produced by enzymatic reactions, such as lipoxygenases, appear to cause lipid peroxidation. While GPX4 is the most potent anti-ferroptotic enzyme that is known to reduce lipid peroxides to alcohols, other antioxidative enzymes are also indirectly involved in protection against ferroptosis. Moreover, several low molecular weight compounds that include α-tocopherol, ascorbate, and nitric oxide also efficiently neutralize radical electrons, thereby suppressing ferroptosis. The removal of radical electrons in the early stages is of primary importance in protecting against ferroptosis and other diseases that are related to oxidative stress.
Collapse
|
12
|
Peroxiredoxin 6 Peroxidase and Ca 2+-Independent Phospholipase A 2 Activities Are Essential to Support Male-Mouse Fertility. Antioxidants (Basel) 2022; 11:antiox11020226. [PMID: 35204109 PMCID: PMC8868156 DOI: 10.3390/antiox11020226] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/22/2022] [Accepted: 01/23/2022] [Indexed: 02/06/2023] Open
Abstract
Human infertility is an important health problem that affects one in six couples worldwide. Half of these cases are due to male infertility. Oxidative stress is a common culprit of male infertility, promoting lipid peroxidation and the oxidation of proteins and DNA in spermatozoa, thereby impairing motility, capacitation and fertilization. Peroxiredoxin 6 (PRDX6) possesses peroxidase and Ca2+-independent-phospholipase-A2 (iPLA2) activities that scavenge ROS and repair oxidized sperm membranes, respectively. PRDX6 protects spermatozoa against oxidative stress. Infertile men’s spermatozoa have impaired motility, elevated lipid peroxidation levels and DNA damage due to low PRDX6 levels. A lack of PRDX6 is associated with male-mouse infertility. Here, we determined the impact of the absence of PRDX6 peroxidase or iPLA2 activities on male-mouse fertility. Two-month-old male C57Bl6/J (wild-type), Prdx6−/−, C47S and D140A knock-in (peroxidase- and iPLA2-deficient, respectively) male mice were challenged with an in vivo oxidative stress triggered by tert-butyl hydroperoxide (t-BHP). C47S and D140A males produced smaller litters compared to wild-type controls. The t-BHP treatment promoted a lower number of pups, high levels of lipid peroxidation, tyrosine nitration, and DNA oxidation in all mutant spermatozoa compared to wild-type controls. All mutant spermatozoa had impaired capacitation and motility. In summary, both PRDX6 peroxidase and iPLA2 activities are essential to support male-mouse fertility.
Collapse
|
13
|
Sureshan M, Prabhu D, Aruldoss I, Saraboji K. Potential inhibitors for peroxiredoxin 6 of W. bancrofti: A combined study of modelling, structure-based drug design and MD simulation. J Mol Graph Model 2021; 112:108115. [PMID: 34990985 DOI: 10.1016/j.jmgm.2021.108115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/16/2021] [Accepted: 12/22/2021] [Indexed: 11/19/2022]
Abstract
Lymphatic filariasis (LF), a mosquito-borne parasitic disease caused by nematode Wuchereria bancrofti in tropical and sub-tropical countries. These nematodes are transferred into the human host when the infected mosquito carrying L3 larvae is released into the bloodstream during the blood ingestion process. The host immune system produces ROS (Reactive Oxygen Species) as a primary defence mechanism to remove the invading filarial worms. However, well-defined antioxidant enzymes of the nematodes scavenge the host-produced ROS to escape from oxidative stress. The enzyme peroxiredoxin 6 (Prx6) belongs to the peroxiredoxin family, catalyses hydrogen peroxide (H2O2) into water (H2O). In order to find the inhibitors that inhibit the activity of peroxiredoxin 6 of W. bancrofti. We performed the homology modelling to predict the WbPrx6 three-dimensional structure using the Schrödinger-Prime and the dynamic stability of the modelled WbPrx6 was analyzed by carrying out the molecular dynamic (MD) simulation for the time scale of 200ns. Further, the structure-based virtual screening shortlisted the hit molecules from the ChemBridge database based on the glide score. The potential lead molecules (ID: 10239274, 11112883, 79879205, 58160895, and 42133744) that have better binding and satisfied the ADMET properties were selected for further complex simulation and DFT calculations. The identified compounds interact with the N-terminal region of the thioredoxin domain, which plays a key role in reducing phospholipase A2 activity. Interestingly, upon binding the lead molecule, the fluctuation of the loop region that connects α-IV with the β-VI plays a vital role in affecting the geometry of the active site, which in turn affects the activity WbPrx6. The outcomes of the present computational studies could help in future drug development and designing of the effective candidate to control Lymphatic filariasis.
Collapse
Affiliation(s)
- Muthusamy Sureshan
- Biomolecular Crystallography Lab, Department of Bioinformatics, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Dhamodharan Prabhu
- Biomolecular Crystallography Lab, Department of Bioinformatics, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Immanuel Aruldoss
- Biomolecular Crystallography Lab, Department of Bioinformatics, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Kadhirvel Saraboji
- Biomolecular Crystallography Lab, Department of Bioinformatics, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India.
| |
Collapse
|
14
|
Chen C, Gong L, Liu X, Zhu T, Zhou W, Kong L, Luo J. Identification of peroxiredoxin 6 as a direct target of withangulatin A by quantitative chemical proteomics in non-small cell lung cancer. Redox Biol 2021; 46:102130. [PMID: 34517184 PMCID: PMC8441215 DOI: 10.1016/j.redox.2021.102130] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 01/13/2023] Open
Abstract
Peroxiredoxin 6 (PRDX6), as a bifunctional enzyme with glutathione peroxidase activity (GPx) and Ca2+-independent phospholipase A2 (iPLA2) activity, has a higher expression in various cancer cells, which leads to the increase of antioxidant properties and promotes tumorigenesis. However, only a few inhibitors of PRDX6 have been discovered to date, especially the covalent inhibitors of PRDX6. Here, we firstly identified Withangulatin A (WA), a natural small molecule, as a novel covalent inhibitor of PRDX6. SILAC-ABPP identified that WA could directly bind to PRDX6 and inactivate the enzyme activity of PRDX6 by the α, β-unsaturated ketone moiety. Moreover, WA also facilitated the generation of ROS, and inhibited the GPx and iPLA2 activities. However, WA-1, with a reduced α, β-unsaturated ketone moiety, had no significant inhibition of the GPx and iPLA2 activities. Biolayer interferometry and LC-MS/MS analysis further demonstrated the selectively covalent binding of WA to the cysteine 47 residue (Cys47) of PRDX6, while mutation of Cys47 blocked the binding of WA to PRDX6. Notably, WA-mediated cytotoxicity and inhibition of the GPx and iPLA2 activities were almost abolished by the deficiency of PRDX6. Therefore, this study indicates that WA is a novel PRDX6 covalent inhibitor, which could covalently bind to the Cys47 of PRDX6 and holds great potential in developing anti-tumor agents for targeting PRDX6.
Collapse
Affiliation(s)
- Chen Chen
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Lijie Gong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Xiaoqin Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Tianyu Zhu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Wuxi Zhou
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Lingyi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| | - Jianguang Luo
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| |
Collapse
|
15
|
Shi Y, Fu L, Yang J, Carroll KS. Wittig reagents for chemoselective sulfenic acid ligation enables global site stoichiometry analysis and redox-controlled mitochondrial targeting. Nat Chem 2021; 13:1140-1150. [PMID: 34531572 DOI: 10.1038/s41557-021-00767-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 07/05/2021] [Indexed: 02/02/2023]
Abstract
Triphenylphosphonium ylides, known as Wittig reagents, are one of the most commonly used tools in synthetic chemistry. Despite their considerable versatility, Wittig reagents have not yet been explored for their utility in biological applications. Here we introduce a chemoselective ligation reaction that harnesses the reactivity of Wittig reagents and the unique chemical properties of sulfenic acid, a pivotal post-translational cysteine modification in redox biology. The reaction, which generates a covalent bond between the ylide nucleophilic α-carbon and electrophilic γ-sulfur, is highly selective, rapid and affords robust labelling under a range of biocompatible reaction conditions, which includes in living cells. We highlight the broad utility of this conjugation method to enable site-specific proteome-wide stoichiometry analysis of S-sulfenylation and to visualize redox-dependent changes in mitochondrial cysteine oxidation and redox-triggered triphenylphosphonium generation for the controlled delivery of small molecules to mitochondria.
Collapse
Affiliation(s)
- Yunlong Shi
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA
| | - Ling Fu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing, China.,National Center for Protein Sciences-Beijing, Beijing, China.,Beijing Institute of Lifeomics, Beijing, China
| | - Jing Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing, China. .,National Center for Protein Sciences-Beijing, Beijing, China. .,Beijing Institute of Lifeomics, Beijing, China.
| | - Kate S Carroll
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, USA.
| |
Collapse
|
16
|
Peroxiredoxins-The Underrated Actors during Virus-Induced Oxidative Stress. Antioxidants (Basel) 2021; 10:antiox10060977. [PMID: 34207367 PMCID: PMC8234473 DOI: 10.3390/antiox10060977] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/09/2021] [Accepted: 06/15/2021] [Indexed: 12/19/2022] Open
Abstract
Enhanced production of reactive oxygen species (ROS) triggered by various stimuli, including viral infections, has attributed much attention in the past years. It has been shown that different viruses that cause acute or chronic diseases induce oxidative stress in infected cells and dysregulate antioxidant its antioxidant capacity. However, most studies focused on catalase and superoxide dismutases, whereas a family of peroxiredoxins (Prdx), the most effective peroxide scavengers, were given little or no attention. In the current review, we demonstrate that peroxiredoxins scavenge hydrogen and organic peroxides at their physiological concentrations at various cell compartments, unlike many other antioxidant enzymes, and discuss their recycling. We also provide data on the regulation of their expression by various transcription factors, as they can be compared with the imprint of viruses on transcriptional machinery. Next, we discuss the involvement of peroxiredoxins in transferring signals from ROS on specific proteins by promoting the oxidation of target cysteine groups, as well as briefly demonstrate evidence of nonenzymatic, chaperone, functions of Prdx. Finally, we give an account of the current state of research of peroxiredoxins for various viruses. These data clearly show that Prdx have not been given proper attention despite all the achievements in general redox biology.
Collapse
|
17
|
van de Wetering C, Elko E, Berg M, Schiffers CHJ, Stylianidis V, van den Berge M, Nawijn MC, Wouters EFM, Janssen-Heininger YMW, Reynaert NL. Glutathione S-transferases and their implications in the lung diseases asthma and chronic obstructive pulmonary disease: Early life susceptibility? Redox Biol 2021; 43:101995. [PMID: 33979767 PMCID: PMC8131726 DOI: 10.1016/j.redox.2021.101995] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 01/01/2023] Open
Abstract
Our lungs are exposed daily to airborne pollutants, particulate matter, pathogens as well as lung allergens and irritants. Exposure to these substances can lead to inflammatory responses and may induce endogenous oxidant production, which can cause chronic inflammation, tissue damage and remodeling. Notably, the development of asthma and Chronic Obstructive Pulmonary Disease (COPD) is linked to the aforementioned irritants. Some inhaled foreign chemical compounds are rapidly absorbed and processed by phase I and II enzyme systems critical in the detoxification of xenobiotics including the glutathione-conjugating enzymes Glutathione S-transferases (GSTs). GSTs, and in particular genetic variants of GSTs that alter their activities, have been found to be implicated in the susceptibility to and progression of these lung diseases. Beyond their roles in phase II metabolism, evidence suggests that GSTs are also important mediators of normal lung growth. Therefore, the contribution of GSTs to the development of lung diseases in adults may already start in utero, and continues through infancy, childhood, and adult life. GSTs are also known to scavenge oxidants and affect signaling pathways by protein-protein interaction. Moreover, GSTs regulate reversible oxidative post-translational modifications of proteins, known as protein S-glutathionylation. Therefore, GSTs display an array of functions that impact the pathogenesis of asthma and COPD. In this review we will provide an overview of the specific functions of each class of mammalian cytosolic GSTs. This is followed by a comprehensive analysis of their expression profiles in the lung in healthy subjects, as well as alterations that have been described in (epithelial cells of) asthmatics and COPD patients. Particular emphasis is placed on the emerging evidence of the regulatory properties of GSTs beyond detoxification and their contribution to (un)healthy lungs throughout life. By providing a more thorough understanding, tailored therapeutic strategies can be designed to affect specific functions of particular GSTs.
Collapse
Affiliation(s)
- Cheryl van de Wetering
- Department of Respiratory Medicine, Maastricht University Medical Center+, Maastricht, the Netherlands; Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - Evan Elko
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - Marijn Berg
- Pathology and Medical Biology, GRIAC Research Institute, University of Groningen, University Medical Center Groningen (UMCG), Groningen, the Netherlands
| | - Caspar H J Schiffers
- Department of Respiratory Medicine, Maastricht University Medical Center+, Maastricht, the Netherlands; Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - Vasili Stylianidis
- Department of Respiratory Medicine, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Maarten van den Berge
- Pulmonology, GRIAC Research Institute, University of Groningen, University Medical Center Groningen (UMCG), Groningen, the Netherlands
| | - Martijn C Nawijn
- Pathology and Medical Biology, GRIAC Research Institute, University of Groningen, University Medical Center Groningen (UMCG), Groningen, the Netherlands
| | - Emiel F M Wouters
- Department of Respiratory Medicine, Maastricht University Medical Center+, Maastricht, the Netherlands; Ludwig Boltzmann Institute for Lung Health, Vienna, Austria
| | - Yvonne M W Janssen-Heininger
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, USA.
| | - Niki L Reynaert
- Department of Respiratory Medicine, Maastricht University Medical Center+, Maastricht, the Netherlands.
| |
Collapse
|
18
|
Daverey A, Agrawal SK. Regulation of Prdx6 by Nrf2 Mediated Through aiPLA2 in White Matter Reperfusion Injury. Mol Neurobiol 2021; 58:1275-1289. [PMID: 33159299 DOI: 10.1007/s12035-020-02182-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/18/2020] [Indexed: 12/18/2022]
Abstract
Hypoxia and reperfusion produces overproduction of ROS (reactive oxygen species), which may lead to mitochondrial dysfunction leading to cell death and apoptosis. Here, we explore the hypothesis that Prdx6 protects the spinal cord white matter from hypoxia-reperfusion injury and elucidate the possible mechanism by which Prdx6 elicits its protective effects. Briefly, rats were deeply anesthetized with isoflurane. A 30-mm section of the spinal cord was rapidly removed and placed in cold Ringer's solution (2-4 °C). The dissected dorsal column was exposed to hypoxia with 95% N2 and 5% CO2 and reperfusion with 95% O2 and 5% CO2. The expression of Prdx6 significantly upregulated in white matter after hypoxia compared to the sham group, whereas reperfusion caused a gradual decrease in Prdx6 expression after reperfusion injury. For the first time, our study revealed the novel expression and localized expression of Prdx6 in astrocytes after hypoxia, and possible communication of astrocytes and axons through Prdx6. The gradual increase in Nrf2 expression suggests a negative regulation of Prdx6 through Nrf2 signaling. Furthermore, inhibition of aiPLA2 activity of Prdx6 by MJ33 shows that the regulation of Prdx6 by Nrf2 is mediated through aiPLA2 activity. The present study uncovers a differential distribution of Prdx6 in axons and astrocytes and regulation of Prdx6 in hypoxia-reperfusion injury. The low levels of Prdx6 in reperfusion injury lead to increased inflammation and apoptosis in the white matter; therefore, the results of this study suggest that Prdx6 has a protective role in spinal hypoxia-reperfusion injury.
Collapse
Affiliation(s)
- Amita Daverey
- Department of Neurosurgery, University of Nebraska Medical Center, Omaha, NE, 68198-7690, USA.
| | - Sandeep K Agrawal
- Department of Neurosurgery, University of Nebraska Medical Center, Omaha, NE, 68198-7690, USA
| |
Collapse
|
19
|
Kalinina E, Novichkova M. Glutathione in Protein Redox Modulation through S-Glutathionylation and S-Nitrosylation. Molecules 2021; 26:molecules26020435. [PMID: 33467703 PMCID: PMC7838997 DOI: 10.3390/molecules26020435] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/08/2021] [Accepted: 01/12/2021] [Indexed: 12/17/2022] Open
Abstract
S-glutathionylation and S-nitrosylation are reversible post-translational modifications on the cysteine thiol groups of proteins, which occur in cells under physiological conditions and oxidative/nitrosative stress both spontaneously and enzymatically. They are important for the regulation of the functional activity of proteins and intracellular processes. Connecting link and “switch” functions between S-glutathionylation and S-nitrosylation may be performed by GSNO, the generation of which depends on the GSH content, the GSH/GSSG ratio, and the cellular redox state. An important role in the regulation of these processes is played by Trx family enzymes (Trx, Grx, PDI), the activity of which is determined by the cellular redox status and depends on the GSH/GSSG ratio. In this review, we analyze data concerning the role of GSH/GSSG in the modulation of S-glutathionylation and S-nitrosylation and their relationship for the maintenance of cell viability.
Collapse
|
20
|
Chowhan RK, Rahaman H, Singh LR. Structural basis of peroxidase catalytic cycle of human Prdx6. Sci Rep 2020; 10:17416. [PMID: 33060708 PMCID: PMC7566464 DOI: 10.1038/s41598-020-74052-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 09/24/2020] [Indexed: 11/23/2022] Open
Abstract
Peroxiredoxin 6 (Prdx6) is a ubiquitously expressed antioxidant non-selenium glutathione peroxidase that is known to play a major role in various physiological and pathological processes. It belongs to the family of peroxidases (referred to as Peroxiredoxins, Prdx's) that work independently of any prosthetic groups or co-factors, and instead utilize a peroxidatic thiol residue for peroxide reduction. Mammalian Prdx's are classified according to the number of Cys implicated in their catalytic activity by the formation of either inter-molecular (typical 2-Cys, Prdx1-4) or intra-molecular (atypical 2-Cys, Prdx5) disulfide bond, or non-covalent interactions (1-Cys, Prdx6). The typical and atypical 2-Prdx's have been identified to show decamer/dimer and monomer/dimer transition, respectively, upon oxidation of their peroxidatic cysteine. However, the alterations in the oligomeric status of Prdx6 as a function of peroxidatic thiol's redox state are still ambiguous. While the crystal structure of recombinant human Prdx6 is resolved as a dimer, the solution structures are reported to have both monomers and dimers. In the present study, we have employed several spectroscopic and electrophoretic probes to discern the impact of change in the redox status of peroxidatic cysteine on conformation and oligomeric status of Prdx6. Our study indicates Prdx6's peroxidase activity to be a redox-based conformation driven process which essentially involves monomer-dimer transition.
Collapse
Affiliation(s)
- Rimpy Kaur Chowhan
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India
| | - Hamidur Rahaman
- Department of Biotechnology, Manipur University, Imphal, 795003, India
| | | |
Collapse
|
21
|
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.
Collapse
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.
| |
Collapse
|
22
|
Samet JM, Chen H, Pennington ER, Bromberg PA. Non-redox cycling mechanisms of oxidative stress induced by PM metals. Free Radic Biol Med 2020; 151:26-37. [PMID: 31877355 PMCID: PMC7803379 DOI: 10.1016/j.freeradbiomed.2019.12.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/13/2019] [Accepted: 12/20/2019] [Indexed: 12/27/2022]
Abstract
Metallic compounds contribute to the oxidative stress of ambient particulate matter (PM) exposure. The toxicity of redox inert ions of cadmium, mercury, lead and zinc, as well as redox-active ions of vanadium and chromium is underlain by dysregulation of mitochondrial function and loss of signaling quiescence. Central to the initiation of these effects is the interaction of metal ions with cysteinyl thiols on glutathione and key regulatory proteins, which leads to impaired mitochondrial electron transport and persistent pan-activation of signal transduction pathways. The mitochondrial and signaling effects are linked by the production of H2O2, generated from mitochondrial superoxide anion or through the activation of NADPH oxidase, which extends the range and amplifies the magnitude of the oxidative effects of the metals. This oxidative burden can be further potentiated by inhibitory effects of the metals on the enzymes of the glutathione and thioredoxin systems. Along with the better-known Fenton-based mechanisms, the non-redox cycling mechanisms of oxidative stress induced by metals constitute significant pathways for cellular injury induced by PM inhalation.
Collapse
Affiliation(s)
- James M Samet
- Environmental Public Health Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Chapel Hill, NC, USA.
| | - Hao Chen
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | | | - Philip A Bromberg
- Center for Environmental Medicine, Asthma and Lung Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| |
Collapse
|
23
|
Elko EA, Cunniff B, Seward DJ, Chia SB, Aboushousha R, van de Wetering C, van der Velden J, Manuel A, Shukla A, Heintz NH, Anathy V, van der Vliet A, Janssen-Heininger YMW. Peroxiredoxins and Beyond; Redox Systems Regulating Lung Physiology and Disease. Antioxid Redox Signal 2019; 31:1070-1091. [PMID: 30799628 PMCID: PMC6767868 DOI: 10.1089/ars.2019.7752] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Significance: The lung is a unique organ, as it is constantly exposed to air, and thus it requires a robust antioxidant defense system to prevent the potential damage from exposure to an array of environmental insults, including oxidants. The peroxiredoxin (PRDX) family plays an important role in scavenging peroxides and is critical to the cellular antioxidant defense system. Recent Advances: Exciting discoveries have been made to highlight the key features of PRDXs that regulate the redox tone. PRDXs do not act in isolation as they require the thioredoxin/thioredoxin reductase/NADPH, sulfiredoxin (SRXN1) redox system, and in some cases glutaredoxin/glutathione, for their reduction. Furthermore, the chaperone function of PRDXs, controlled by the oxidation state, demonstrates the versatility in redox regulation and control of cellular biology exerted by this class of proteins. Critical Issues: Despite the long-known observations that redox perturbations accompany a number of pulmonary diseases, surprisingly little is known about the role of PRDXs in the etiology of these diseases. In this perspective, we review the studies that have been conducted thus far to address the roles of PRDXs in lung disease, or experimental models used to study these diseases. Intriguing findings, such as the secretion of PRDXs and the formation of autoantibodies, raise a number of questions about the pathways that regulate secretion, redox status, and immune response to PRDXs. Future Directions: Further understanding of the mechanisms by which individual PRDXs control lung inflammation, injury, repair, chronic remodeling, and cancer, and the importance of PRDX oxidation state, configuration, and client proteins that govern these processes is needed.
Collapse
Affiliation(s)
- Evan A Elko
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Brian Cunniff
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - David J Seward
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Shi Biao Chia
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Reem Aboushousha
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Cheryl van de Wetering
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Jos van der Velden
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Allison Manuel
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Arti Shukla
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Nicholas H Heintz
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Vikas Anathy
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Albert van der Vliet
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Yvonne M W Janssen-Heininger
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| |
Collapse
|
24
|
O'Flaherty C. Orchestrating the antioxidant defenses in the epididymis. Andrology 2019; 7:662-668. [PMID: 31044545 DOI: 10.1111/andr.12630] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/26/2018] [Accepted: 03/29/2019] [Indexed: 01/07/2023]
Abstract
BACKGROUND During the post-testicular maturation that occurs in the epididymis, spermatozoa need to face biochemical and morphological changes that may make them vulnerable to oxidative damage. During spermatogenesis and the epididymal maturation, the spermatozoon acquires antioxidant enzymes needed to face possible increases of reactive oxygen species (ROS) produced by its own aerobic metabolism but also due to ROS produced in high quantities by abnormal spermatozoa. OBJECTIVES Provide an up-to-date review of the enzymatic antioxidant system in the epididymis. MATERIAL AND METHODS A thorough literature review was performed for papers concerning the players of the antioxidant defenses in the epididymis. RESULTS The antioxidant system in the epididymis is composed by superoxide dismutases, catalase, glutathione peroxidases, peroxiredoxins, glutathione-S-transferases, thioredoxins and thioredoxin reductase. They work together to maintain low levels of ROS during the epididymal maturation. Knockout models revealed that the absence of one of the enzyme impact sperm quality affecting a variety of proteins involved in motility, the ability to fertilize oocyte, and promotes oxidative damage to the sperm DNA. DISCUSSION AND CONCLUSIONS These findings suggest that each enzyme is playing a specific role, and in most of the cases, no compensatory mechanisms are put in place when one enzyme is absent. This review highlights the different antioxidant enzymes in the epididymis and their role during maturation of the spermatozoon.
Collapse
Affiliation(s)
- C O'Flaherty
- Departments of Surgery (Urology Division) and Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada.,The Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| |
Collapse
|
25
|
Antioxidants Special Issue: Peroxiredoxin 6 as a Unique Member of the Peroxiredoxin Family. Antioxidants (Basel) 2019; 8:antiox8040107. [PMID: 31010116 PMCID: PMC6523856 DOI: 10.3390/antiox8040107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 12/15/2022] Open
|
26
|
Feinstein SI. Mouse Models of Genetically Altered Peroxiredoxin 6. Antioxidants (Basel) 2019; 8:E77. [PMID: 30934692 PMCID: PMC6523285 DOI: 10.3390/antiox8040077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/07/2019] [Accepted: 03/20/2019] [Indexed: 01/07/2023] Open
Abstract
Peroxiredoxin 6 (Prdx6) has been shown to have three enzymatic activities: peroxidase, phospholipase A₂ (PLA₂) and acyl transferase. The peroxidase activity is unusual, as it is capable of reducing phospholipid hydroperoxides (as well as hydrogen peroxide and short chain organic peroxides). Knockout and overexpressing mice have been produced that demonstrate the effect that eliminating or overproducing Prdx6 has on the animals' physiology. In addition, mutations in various amino acids of Prdx6 have been identified that interfere with different enzymatic functions as well as protein transport. These mutations were originally characterized biochemically; subsequently, several knock-in mouse strains have been produced, each containing one mutation. These mice include the S32T knock-in that affects protein transport, the C47S knock-in that inactivates the peroxidase enzymatic activity, the D140A knock-in that inactivates the PLA₂ enzymatic activity and the H26A knock-in that inactivates the peroxidase and blocks binding to phospholipids. This review summarizes the properties of these mice based upon studies conducted with the knockout, overexpressing and knock-in mice and the effect of the genetic changes on the biochemistry and physiology of these mice. The availability of these mice is also briefly discussed.
Collapse
Affiliation(s)
- Sheldon I Feinstein
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
- Peroxitech, Ltd., Philadelphia, PA 19104, USA.
| |
Collapse
|
27
|
Peroxiredoxin6 in Endothelial Signaling. Antioxidants (Basel) 2019; 8:antiox8030063. [PMID: 30871234 PMCID: PMC6466833 DOI: 10.3390/antiox8030063] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/21/2019] [Accepted: 03/05/2019] [Indexed: 02/07/2023] Open
Abstract
Peroxiredoxins (Prdx) are a ubiquitous family of highly conserved antioxidant enzymes with a cysteine residue that participate in the reduction of peroxides. This family comprises members Prdx1–6, of which Peroxiredoxin 6 (Prdx6) is unique in that it is multifunctional with the ability to neutralize peroxides (peroxidase activity) and to produce reactive oxygen species (ROS) via its phospholipase (PLA2) activity that drives assembly of NADPH oxidase (NOX2). From the crystal structure, a C47 residue is responsible for peroxidase activity while a catalytic triad (S32, H26, and D140) has been identified as the active site for its PLA2 activity. This paradox of being an antioxidant as well as an oxidant generator implies that Prdx6 is a regulator of cellular redox equilibrium (graphical abstract). It also indicates that a fine-tuned regulation of Prdx6 expression and activity is crucial to cellular homeostasis. This is specifically important in the endothelium, where ROS production and signaling are critical players in inflammation, injury, and repair, that collectively signal the onset of vascular diseases. Here we review the role of Prdx6 as a regulator of redox signaling, specifically in the endothelium and in mediating various pathologies.
Collapse
|
28
|
Shahnaj S, Chowhan RK, Meetei PA, Kakchingtabam P, Herojit Singh K, Rajendrakumar Singh L, Nongdam P, Fisher AB, Rahaman H. Hyperoxidation of Peroxiredoxin 6 Induces Alteration from Dimeric to Oligomeric State. Antioxidants (Basel) 2019; 8:antiox8020033. [PMID: 30717364 PMCID: PMC6406459 DOI: 10.3390/antiox8020033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/22/2019] [Accepted: 01/29/2019] [Indexed: 12/15/2022] Open
Abstract
Peroxiredoxins(Prdx), the family of non-selenium glutathione peroxidases, are important antioxidant enzymes that defend our system from the toxic reactive oxygen species (ROS). They are thiol-based peroxidases that utilize self-oxidation of their peroxidatic cysteine (Cp) group to reduce peroxides and peroxidized biomolecules. However, because of its high affinity for hydrogen peroxide this peroxidatic cysteine moiety is extremely susceptible to hyperoxidation, forming peroxidase inactive sulfinic acid (Cys-SO₂H) and sulfonic acid (Cys-SO₃H) derivatives. With the exception of peroxiredoxin 6 (Prdx6), hyperoxidized sulfinic forms of Prdx can be reversed to restore peroxidase activity by the ATP-dependent enzyme sulfiredoxin. Interestingly, hyperoxidized Prdx6 protein seems to have physiological significance as hyperoxidation has been reported to dramatically upregulate its calcium independent phospholipase A₂ activity. Using biochemical studies and molecular dynamic (MD) simulation, we investigated the roles of thermodynamic, structural and internal flexibility of Prdx6 to comprehend the structural alteration of the protein in the oxidized state. We observed the loosening of the hydrophobic core of the enzyme in its secondary and tertiary structures. These changes do not affect the internal dynamics of the protein (as indicated by root-mean-square deviation, RMSD and root mean square fluctuation, RMSF plots). Native-PAGE and dynamic light scattering experiments revealed the formation of higher oligomers of Prdx6 under hyperoxidation. Our study demonstrates that post translational modification (like hyperoxidation) in Prdx6 can result in major alterations of its multimeric status.
Collapse
Affiliation(s)
- Sharifun Shahnaj
- Department of Biotechnology, Manipur University, Manipur 795003, India.
| | | | | | | | | | | | | | - Aron B Fisher
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6068, USA.
| | - Hamidur Rahaman
- Department of Biotechnology, Manipur University, Manipur 795003, India.
| |
Collapse
|
29
|
Forshaw TE, Holmila R, Nelson KJ, Lewis JE, Kemp ML, Tsang AW, Poole LB, Lowther WT, Furdui CM. Peroxiredoxins in Cancer and Response to Radiation Therapies. Antioxidants (Basel) 2019; 8:antiox8010011. [PMID: 30609657 PMCID: PMC6356878 DOI: 10.3390/antiox8010011] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/23/2018] [Accepted: 12/25/2018] [Indexed: 12/11/2022] Open
Abstract
Peroxiredoxins have a long-established cellular function as regulators of redox metabolism by catalyzing the reduction of peroxides (e.g., H2O2, lipid peroxides) with high catalytic efficiency. This activity is also critical to the initiation and relay of both phosphorylation and redox signaling in a broad range of pathophysiological contexts. Under normal physiological conditions, peroxiredoxins protect normal cells from oxidative damage that could promote oncogenesis (e.g., environmental stressors). In cancer, higher expression level of peroxiredoxins has been associated with both tumor growth and resistance to radiation therapies. However, this relationship between the expression of peroxiredoxins and the response to radiation is not evident from an analysis of data in The Cancer Genome Atlas (TCGA) or NCI60 panel of cancer cell lines. The focus of this review is to summarize the current experimental knowledge implicating this class of proteins in cancer, and to provide a perspective on the value of targeting peroxiredoxins in the management of cancer. Potential biases in the analysis of the TCGA data with respect to radiation resistance are also highlighted.
Collapse
Affiliation(s)
- Tom E Forshaw
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Reetta Holmila
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Kimberly J Nelson
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Joshua E Lewis
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA.
| | - Melissa L Kemp
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA.
| | - Allen W Tsang
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Leslie B Poole
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - W Todd Lowther
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Cristina M Furdui
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| |
Collapse
|
30
|
Bartolini D, Torquato P, Piroddi M, Galli F. Targeting glutathione S-transferase P and its interactome with selenium compounds in cancer therapy. Biochim Biophys Acta Gen Subj 2019; 1863:130-143. [DOI: 10.1016/j.bbagen.2018.09.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 12/14/2022]
|
31
|
Zhou S, Dodia C, Feinstein SI, Harper S, Forman HJ, Speicher DW, Fisher AB. Oxidation of Peroxiredoxin 6 in the Presence of GSH Increases its Phospholipase A₂ Activity at Cytoplasmic pH. Antioxidants (Basel) 2018; 8:antiox8010004. [PMID: 30586895 PMCID: PMC6357108 DOI: 10.3390/antiox8010004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/05/2018] [Accepted: 12/18/2018] [Indexed: 01/25/2023] Open
Abstract
The expression of the phospholipase A2 activity (aiPLA2) of peroxiredoxin 6 (Prdx6) in the cell cytoplasm is physiologically relevant for the repair of peroxidized cell membranes, but aiPLA2 assay in vitro indicates that, unlike assay at pH 4, activity at cytosolic pH is essentially absent with non-oxidized substrate. However, the addition of glutathione (GSH) to the assay medium significantly increased aiPLA2 activity at cytosolic pH, while oxidized GSH (GSSG) and several other thiols had no effect. By mass spectroscopy (ESI MS), the addition of GSH to Prdx6 paradoxically led to oxidation of its conserved Cys47 residue to a sulfinic acid. The effect of GSH on PLA2 activity was abolished by incubation under anaerobic conditions, confirming that auto-oxidation of the protein was the mechanism for the GSH effect. Analysis by circular dichroism (CD) and tryptophan fluorescence showed alterations of the protein structure in the presence of GSH. Independently of GSH, the oxidation of Prdx6 by exposure to H2O2 or the presence of oxidized phospholipid as substrate also significantly increased aiPLA2 activity at pH 7. We conclude that the oxidation of the peroxidatically active Cys47 of Prdx6 results in an increase of aiPLA2 activity at pH 7 without effect on the activity of the enzyme at pH 4.
Collapse
Affiliation(s)
- Suiping Zhou
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
| | - Chandra Dodia
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
| | - Sheldon I Feinstein
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
| | - Sandra Harper
- Center for Systems and Computational Biology, The Wistar Institute, Philadelphia, PA 19104, USA.
| | - Henry J Forman
- Leonard Davis School of Gerontology, The University of Southern California, Los Angeles, CA 19104, USA.
| | - David W Speicher
- Center for Systems and Computational Biology, The Wistar Institute, Philadelphia, PA 19104, USA.
| | - Aron B Fisher
- Institute for Environmental Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
| |
Collapse
|
32
|
Arevalo JA, Vázquez-Medina JP. The Role of Peroxiredoxin 6 in Cell Signaling. Antioxidants (Basel) 2018; 7:antiox7120172. [PMID: 30477202 PMCID: PMC6316032 DOI: 10.3390/antiox7120172] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 11/17/2018] [Accepted: 11/20/2018] [Indexed: 12/20/2022] Open
Abstract
Peroxiredoxin 6 (Prdx6, 1-cys peroxiredoxin) is a unique member of the peroxiredoxin family that, in contrast to other mammalian peroxiredoxins, lacks a resolving cysteine and uses glutathione and π glutathione S-transferase to complete its catalytic cycle. Prdx6 is also the only peroxiredoxin capable of reducing phospholipid hydroperoxides through its glutathione peroxidase (Gpx) activity. In addition to its peroxidase activity, Prdx6 expresses acidic calcium-independent phospholipase A2 (aiPLA2) and lysophosphatidylcholine acyl transferase (LPCAT) activities in separate catalytic sites. Prdx6 plays crucial roles in lung phospholipid metabolism, lipid peroxidation repair, and inflammatory signaling. Here, we review how the distinct activities of Prdx6 are regulated during physiological and pathological conditions, in addition to the role of Prdx6 in cellular signaling and disease.
Collapse
Affiliation(s)
- José A Arevalo
- Department of Integrative Biology, University of California, Berkeley, CA, 94705, USA.
| | | |
Collapse
|
33
|
O'Flaherty C, Matsushita-Fournier D. Reactive oxygen species and protein modifications in spermatozoa. Biol Reprod 2018; 97:577-585. [PMID: 29025014 DOI: 10.1093/biolre/iox104] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 09/11/2017] [Indexed: 02/07/2023] Open
Abstract
Cellular response to reactive oxygen species (ROS) includes both reversible redox signaling and irreversible nonenzymatic reactions which depend on the nature and concentration of the ROS involved. Changes in thiol/disulfide pairs affect protein conformation, enzymatic activity, ligand binding, and protein-protein interactions. During spermatogenesis and epididymal maturation, there are ROS-dependent modifications of the sperm chromatin and flagellar proteins.The spermatozoon is regulated by redox mechanisms to acquire fertilizing ability. For this purpose, controlled amounts of ROS are necessary to assure sperm activation (motility and capacitation). Modifications of the thiol groups redox status of sperm proteins are needed for spermatozoon to achieve fertilizing ability. However, when ROS are produced at high concentrations, the established oxidative stress promotes pathological changes affecting sperm function and leading to infertility. Sperm proteins are sensitive to high levels of ROS and suffer modifications that impact on motility, capacitation, and the ability of the spermatozoon to recognize and bind to the zona pellucida and damage of sperm DNA. Thiol oxidation, tyrosine nitration, and S-glutathionylation are highlighted in this review as significant redox-dependent protein modifications associated with impairment of sperm function and alteration of paternal genome leading to infertility. Peroxiredoxins, the primary antioxidant protection in spermatozoa, are affected by most of the protein modifications described in this review. They play a significant role in both physiological and pathological processes in mammalian spermatozoa.
Collapse
Affiliation(s)
- Cristian O'Flaherty
- Department of Surgery (Urology Division), McGill University, Montréal, Québec, Canada.,Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montréal, Québec, Canada.,The Research Institute, McGill University Health Centre, Montréal, Québec, Canada
| | - David Matsushita-Fournier
- Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montréal, Québec, Canada.,The Research Institute, McGill University Health Centre, Montréal, Québec, Canada
| |
Collapse
|
34
|
Fisher AB. The phospholipase A 2 activity of peroxiredoxin 6. J Lipid Res 2018; 59:1132-1147. [PMID: 29716959 DOI: 10.1194/jlr.r082578] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 04/30/2018] [Indexed: 12/21/2022] Open
Abstract
Peroxiredoxin 6 (Prdx6) is a Ca2+-independent intracellular phospholipase A2 (called aiPLA2) that is localized to cytosol, lysosomes, and lysosomal-related organelles. Activity is minimal at cytosolic pH but is increased significantly with enzyme phosphorylation, at acidic pH, and in the presence of oxidized phospholipid substrate; maximal activity with phosphorylated aiPLA2 is ∼2 µmol/min/mg protein. Prdx6 is a "moonlighting" protein that also expresses glutathione peroxidase and lysophosphatidylcholine acyl transferase activities. The catalytic site for aiPLA2 activity is an S32-H26-D140 triad; S32-H26 is also the phospholipid binding site. Activity is inhibited by a serine "protease" inhibitor (diethyl p-nitrophenyl phosphate), an analog of the PLA2 transition state [1-hexadecyl-3-(trifluoroethyl)-sn-glycero-2-phosphomethanol (MJ33)], and by two naturally occurring proteins (surfactant protein A and p67phox), but not by bromoenol lactone. aiPLA2 activity has important physiological roles in the turnover (synthesis and degradation) of lung surfactant phospholipids, in the repair of peroxidized cell membranes, and in the activation of NADPH oxidase type 2 (NOX2). The enzyme has been implicated in acute lung injury, carcinogenesis, neurodegenerative diseases, diabetes, male infertility, and sundry other conditions, although its specific roles have not been well defined. Protein mutations and animal models are now available to further investigate the roles of Prdx6-aiPLA2 activity in normal and pathological physiology.
Collapse
Affiliation(s)
- Aron B Fisher
- Institute for Environmental Medicine of the Department of Physiology, University of Pennsylvania, Philadelphia, PA 19103
| |
Collapse
|
35
|
Sharapov MG, Gordeeva AE, Goncharov RG, Tikhonova IV, Ravin VK, Temnov AA, Fesenko EE, Novoselov VI. The Effect of Exogenous Peroxiredoxin 6 on the State of Mesenteric Vessels and the Small Intestine in Ischemia–Reperfusion Injury. Biophysics (Nagoya-shi) 2018. [DOI: 10.1134/s0006350917060239] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
|
36
|
Park MH, Yun HM, Hwang CJ, Park SI, Han SB, Hwang DY, Yoon DY, Kim S, Hong JT. Presenilin Mutation Suppresses Lung Tumorigenesis via Inhibition of Peroxiredoxin 6 Activity and Expression. Theranostics 2017; 7:3624-3637. [PMID: 29109765 PMCID: PMC5667337 DOI: 10.7150/thno.21408] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 06/24/2017] [Indexed: 01/01/2023] Open
Abstract
Some epidemiological studies suggest an inverse correlation between cancer incidence and Alzheimer's disease (AD). In this study, we demonstrated experimental evidences for this inverse relationship. In the co-expression network analysis using the microarray data and GEO profile of gene expression omnibus data analysis, we showed that the expression of peroxiredoxin 6 (PRDX6), a tumor promoting protein was significantly increased in human squamous lung cancer, but decreased in mutant presenilin 2 (PS2) containing AD patient. We also found in animal model that mutant PS2 transgenic mice displayed a reduced incidence of spontaneous and carcinogen-induced lung tumor development compared to wildtype transgenic mice. Agreed with network and GEO profile study, we also revealed that significantly reduced expression of PRDX6 and activity of iPLA2 in these animal models. PS2 mutations increased their interaction with PRDX6, thereby increasing iPLA2 cleavage via increased γ-secretase leading to loss of PRDX6 activity. However, knockdown or inhibition of γ-secretase abolished the inhibitory effect of mutant PSs. Moreover, PS2 mutant skin fibroblasts derived from patients with AD showed diminished iPLA2 activity by the elevated γ-secretase activity. Thus, the present data suggest that PS2 mutations suppress lung tumor development by inhibiting the iPLA2 activity of PRDX6 via a γ-secretase cleavage mechanism and may explain the inverse relationship between cancer and AD incidence.
Collapse
|
37
|
Liu GY, Shi JX, Shi SL, Liu F, Rui G, Li X, Gao LB, Deng XL, Li QF. Nucleophosmin Regulates Intracellular Oxidative Stress Homeostasis via Antioxidant PRDX6. J Cell Biochem 2017; 118:4697-4707. [PMID: 28513872 DOI: 10.1002/jcb.26135] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/16/2017] [Indexed: 12/23/2022]
Abstract
Reactive oxygen species (ROS) play both deleterious and beneficial roles in cancer cells. Nucleophosmin (NPM) is heavily implicated in cancers of diverse origins, being its gene over-expression in solid tumors or frequent mutations in hematological malignancies. However, the role and regulatory mechanism of NPM in oxidative stress are unclear. Here, we found that NPM regulated the expression of peroxiredoxin 6 (PRDX6), a member of thiol-specific antioxidant protein family, consequently affected the level and distribution of ROS. Our data indicated that NPM knockdown caused the increase of ROS and its relocation from cytoplasm to nucleoplasm. In contrast, overexpression or cytoplasmic localization of NPM upregulated PRDX6, and decreased ROS. In addition, NPM knockdown decreased peroxiredoxin family proteins, including PRDX1, PRDX4, and PRDX6. Co-immunoprecipitation further confirmed the interaction between PRDX6 and NPM. Moreover, NSC348884, an inhibitor specifically targeting NPM oligomerization, decreased PRDX6 and significantly upregulated ROS. These observations demonstrated that the expression and localization of NPM affected the homeostatic balance of oxidative stress in tumor cells via PRDX6 protein. The regulation axis of NPM/PRDX/ROS may provide a novel therapeutic target for cancer treatment. J. Cell. Biochem. 118: 4697-4707, 2017. © 2017 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Guo-Yan Liu
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China.,Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University/ Institute of Gastrointestinal Oncology, Medical College of Xiamen University, Xiamen 361102, P.R. China
| | - Jing-Xian Shi
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| | - Song-Lin Shi
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| | - Fan Liu
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| | - Gang Rui
- Department of Orthopedics, The First Affiliated Hospital of Xiamen University, Xiamen 361003, P.R. China
| | - Xiao Li
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| | - Li-Bin Gao
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| | - Xiao-Ling Deng
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| | - Qi-Fu Li
- Medical College of Xiamen University/Cancer Research Center of Xiamen University, Xiamen 361102, P.R. China
| |
Collapse
|
38
|
Fisher AB. Peroxiredoxin 6 in the repair of peroxidized cell membranes and cell signaling. Arch Biochem Biophys 2017; 617:68-83. [PMID: 27932289 PMCID: PMC5810417 DOI: 10.1016/j.abb.2016.12.003] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 12/12/2022]
Abstract
Peroxiredoxin 6 represents a widely distributed group of peroxiredoxins that contain a single conserved cysteine in the protein monomer (1-cys Prdx). The cys when oxidized to the sulfenic form is reduced with glutathione (GSH) catalyzed by the π isoform of GSH-S-transferase. Three enzymatic activities of the protein have been described:1) peroxidase with H2O2, short chain hydroperoxides, and phospholipid hydroperoxides as substrates; 2) phospholipase A2 (PLA2); and 3) lysophosphatidylcholine acyl transferase (LPCAT). These activities have important physiological roles in antioxidant defense, turnover of cellular phospholipids, and the generation of superoxide anion via initiation of the signaling cascade for activation of NADPH oxidase (type 2). The ability of Prdx6 to reduce peroxidized cell membrane phospholipids (peroxidase activity) and also to replace the oxidized sn-2 fatty acyl group through hydrolysis/reacylation (PLA2 and LPCAT activities) provides a complete system for the repair of peroxidized cell membranes.
Collapse
Affiliation(s)
- Aron B Fisher
- Institute for Environmental Medicine of the Department of Physiology, University of Pennsylvania, 3620 Hamilton Walk, 1 John Morgan Building, Philadelphia, PA, United States.
| |
Collapse
|
39
|
Sharapov MG, Novoselov VI, Fesenko EE, Bruskov VI, Gudkov SV. The role of peroxiredoxin 6 in neutralization of X-ray mediated oxidative stress: effects on gene expression, preservation of radiosensitive tissues and postradiation survival of animals. Free Radic Res 2017; 51:148-166. [DOI: 10.1080/10715762.2017.1289377] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- M. G. Sharapov
- Institute of Cell Biophysics, Russian Academy of Sciences, Moscow, Russia
| | - V. I. Novoselov
- Institute of Cell Biophysics, Russian Academy of Sciences, Moscow, Russia
| | - E. E. Fesenko
- Institute of Cell Biophysics, Russian Academy of Sciences, Moscow, Russia
| | - V. I. Bruskov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Moscow, Russia
| | - S. V. Gudkov
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, Russia
- Lobachevsky State University of Nizhni Novgorod, Nizhni Novgorod, Russia
| |
Collapse
|
40
|
Scalvini L, Vacondio F, Bassi M, Pala D, Lodola A, Rivara S, Jung KM, Piomelli D, Mor M. Free-energy studies reveal a possible mechanism for oxidation-dependent inhibition of MGL. Sci Rep 2016; 6:31046. [PMID: 27499063 PMCID: PMC4976315 DOI: 10.1038/srep31046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 07/12/2016] [Indexed: 12/13/2022] Open
Abstract
The function of monoacylglycerol lipase (MGL), a key actor in the hydrolytic deactivation of the endocannabinoid 2-arachidonoyl-sn-glycerol (2AG), is tightly controlled by the cell’s redox state: oxidative signals such as hydrogen peroxide suppress MGL activity in a reversible manner through sulfenylation of the peroxidatic cysteines, C201 and C208. Here, using as a starting point the crystal structures of human MGL (hMGL), we present evidence from molecular dynamics and metadynamics simulations along with high-resolution mass spectrometry studies indicating that sulfenylation of C201 and C208 alters the conformational equilibrium of the membrane-associated lid domain of MGL to favour closed conformations of the enzyme that do not permit the entry of substrate into the active site.
Collapse
Affiliation(s)
- Laura Scalvini
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| | - Federica Vacondio
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| | - Michele Bassi
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| | - Daniele Pala
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| | - Alessio Lodola
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| | - Silvia Rivara
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| | - Kwang-Mook Jung
- Department of Anatomy and Neurobiology, University of California, Irvine, Irvine, CA 92697, United States
| | - Daniele Piomelli
- Department of Anatomy and Neurobiology, University of California, Irvine, Irvine, CA 92697, United States.,Department of Biological Chemistry, University of California, Irvine, Irvine, CA 92697, United States.,Unit of Drug Discovery and Development, Istituto Italiano di Tecnologia, I-16163, Genova, Italy
| | - Marco Mor
- Dipartimento di Farmacia, Università degli Studi di Parma, I-43124 Parma, Italy
| |
Collapse
|
41
|
Fisher AB, Dodia C, Sorokina EM, Li H, Zhou S, Raabe T, Feinstein SI. A novel lysophosphatidylcholine acyl transferase activity is expressed by peroxiredoxin 6. J Lipid Res 2016; 57:587-96. [PMID: 26830860 DOI: 10.1194/jlr.m064758] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Indexed: 12/31/2022] Open
Abstract
The phospholipase A2(PLA2) activity of peroxiredoxin (Prdx)6 has important physiological roles in the synthesis of lung surfactant and in the repair of peroxidized cell membranes. These functions require the activity of a lysophospholipid acyl transferase as a critical component of the phospholipid remodeling pathway. We now describe a lysophosphatidylcholine acyl transferase (LPCAT) activity for Prdx6 that showed a strong preference for lysophosphatidylcholine (LPC) as the head group and for palmitoyl CoA in the acylation reaction. The calculated kinetic constants for acylation wereKm18 μM andVmax30 nmol/min/mg protein; theVmaxwas increased 25-fold by phosphorylation of the protein whileKmwas unchanged. Study of recombinant protein in vitro and in mouse pulmonary microvascular endothelial cells infected with a lentiviral vector construct indicated that amino acid D31 is crucial for LPCAT activity. A linear incorporation of labeled fatty acyl CoA into dipalmitoyl phosphatidylcholine (PC) indicated that LPC generated by Prdx6 PLA2activity remained bound to the enzyme for the reacylation reaction. Prdx6 is the first LPCAT enzyme with demonstrated cytoplasmic localization. Thus, Prdx6 is a complete enzyme comprising both PLA2and LPCAT activities for the remodeling pathway of PC synthesis or for repair of membrane lipid peroxidation.
Collapse
Affiliation(s)
- Aron B Fisher
- Institute for Environmental Medicine and the Department of Physiology University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | - Chandra Dodia
- Institute for Environmental Medicine and the Department of Physiology University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | - Elena M Sorokina
- Institute for Environmental Medicine and the Department of Physiology University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | - Haitao Li
- Institute for Environmental Medicine and the Department of Physiology University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | - Suiping Zhou
- Institute for Environmental Medicine and the Department of Physiology University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | - Tobias Raabe
- Penn Gene Targeting Core and Laboratory, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| | - Sheldon I Feinstein
- Institute for Environmental Medicine and the Department of Physiology University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104
| |
Collapse
|