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Ríos-González BB, Domán A, Ditrói T, Garai D, Crespo LD, Gerfen GJ, Furtmüller PG, Nagy P, López-Garriga J. Lactoperoxidase catalytically oxidize hydrogen sulfide via intermediate formation of sulfheme derivatives. REDOX BIOCHEMISTRY AND CHEMISTRY 2024; 8:100021. [PMID: 38993681 PMCID: PMC11238738 DOI: 10.1016/j.rbc.2024.100021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
The biological chemistry of hydrogen sulfide (H2S) with physiologically important heme proteins is in the focus of redox biology research. In this study, we investigated the interactions of lactoperoxidase (LPO) with H2S in the presence and absence of molecular dioxygen (O2) or hydrogen peroxide (H2O2). Under anaerobic conditions, native LPO forms no heme-H2S complex upon sulfide exposure. However, under aerobic conditions or in the presence of H2O2 the formation of both ferrous and ferric sulfheme (sulfLPO) derivatives was observed based on the appearances of their characteristic optical absorptions at 638 nm and 727 nm, respectively. Interestingly, we demonstrate that LPO can catalytically oxidize H2S by H2O2 via intermediate formation of relatively short-lived ferrous and ferric sulfLPO derivatives. Pilot product analyses suggested that the turnover process generates oxidized sulfide species, which include sulfateS O 4 2 - and inorganic polysulfides (H S x - ; x = 2-5). These results indicated that H2S can serve as a non-classical LPO substrate by inducing a reversible sulfheme-like modification of the heme porphyrin ring during turnover. Furthermore, electron paramagnetic resonance data suggest that H2S can act as a scavenger of H2O2 in the presence of LPO without detectable formation of any carbon-centered protein radical species, suggesting that H2S might be capable of protecting the enzyme from radical-mediated damage. We propose possible mechanisms, which explain our results as well as contrasting observations with other heme proteins, where either no sulfheme formation was observed or the generation of sulfheme derivatives provided a dead end for enzyme functions.
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Affiliation(s)
- Bessie B Ríos-González
- Department of Chemistry, University of Puerto Rico, Mayagüez Campus, P.O. Box 9019, Mayagüez, 00681-9019, Puerto Rico
| | - Andrea Domán
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Ráth György street 7-9, Budapest, 1122, Hungary
| | - Tamás Ditrói
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Ráth György street 7-9, Budapest, 1122, Hungary
| | - Dorottya Garai
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Ráth György street 7-9, Budapest, 1122, Hungary
| | - Leishka D Crespo
- Department of Chemistry, University of Puerto Rico, Mayagüez Campus, P.O. Box 9019, Mayagüez, 00681-9019, Puerto Rico
| | - Gary J Gerfen
- Department of Physiology & Biophysics, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY, 10461, United States
| | - Paul G Furtmüller
- Institute of Biochemistry, Department of Chemistry, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, Vienna, Austria, A-1190
| | - Péter Nagy
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Ráth György street 7-9, Budapest, 1122, Hungary
- Department of Anatomy and Histology, ELKH Laboratory of Redox Biology, University of Veterinary Medicine, István street 2, Budapest, 1078, Hungary
- Chemistry Institute, University of Debrecen, Egyetem square 1, Debrecen, 4032, Hungary
| | - Juan López-Garriga
- Department of Chemistry, University of Puerto Rico, Mayagüez Campus, P.O. Box 9019, Mayagüez, 00681-9019, Puerto Rico
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2
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Zhong G, Guo Y, Gong X, Xu M, Wang Q, Wu M, Zhang X, Liang Y, Zhao W, Wang H, Ye J. Enhanced glycolysis by ATPIF1 gene inactivation increased the anti-bacterial activities of neutrophils through induction of ROS and lactic acid. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166820. [PMID: 37558010 DOI: 10.1016/j.bbadis.2023.166820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/20/2023] [Accepted: 07/23/2023] [Indexed: 08/11/2023]
Abstract
ATP synthase inhibitory factor 1 (ATPIF1) is a mitochondrial protein that regulates the activity of FoF1-ATP synthase. Mice lacking ATPIF1 throughout their bodies (Atpif1-/-) exhibit a reduction in the number of neutrophils. However, it remains unclear whether the inactivation of ATPIF1 impairs the antibacterial function of mice, this study aimed to evaluate it using a mouse peritonitis model. Mice were intraperitoneally injected with E. coli to induce peritonitis, and after 24 h, the colonies of E. coli were counted in agarose plates containing mice peritoneal lavage fluids (PLF) or extract from the liver. Neutrophils were analyzed for glucose metabolism in glycolysis following LPS stimulation. Reactive oxygen species (ROS) and lactic acid (LA) levels in neutrophils were measured using flow cytometry and Seahorse analysis, respectively. N-Acetylcysteine (NAC) and 2-Deoxy-d-glucose (2-DG) were employed to assess the role of ROS and LA in neutrophil bactericidal activity. RNA-seq analysis was conducted in neutrophils to investigate potential mechanisms. In ATPIF1-/- neutrophils, bactericidal activity was enhanced, accompanied by increased levels of ROS and LA compared to wildtype neutrophils. The augmented bactericidal activity of ATPIF1-/- neutrophils was reversed by pretreatment with NAC or 2-DG. RNA-seq analysis revealed downregulation of multiple genes involved in glutathione metabolism, pyruvate oxidation, and heme synthesis, along with increased expression of inflammatory and apoptotic genes. This study suggests that the inactivation of the Atpif1 gene enhances glucose metabolism in neutrophils, resulting in increased bactericidal activity mediated by elevated levels of ROS and LA. Inhibiting ATPIF1 may be a potential approach to enhance antibacterial immunity.
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Affiliation(s)
- Genshen Zhong
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China; Department of Biological and Chemical Engineering, Changsha University, Changsha 410022, Hunan, China
| | - Ying Guo
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Xue Gong
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Meiqi Xu
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Qi Wang
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Minna Wu
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Xiaoying Zhang
- Metabolic Disease Research Center, Zhengzhou University Affiliated Zhengzhou Central Hospital, Zhengzhou 450007, China
| | - Yinming Liang
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Weidong Zhao
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Hui Wang
- Henan Key Laboratory of Immunology and Targeted Therapy, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Jianping Ye
- Metabolic Disease Research Center, Zhengzhou University Affiliated Zhengzhou Central Hospital, Zhengzhou 450007, China; Research Center for Basic Medicine, Academy of Medical Sciences, Zhengzhou University, Zhengzhou 450052, China.
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3
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Álvarez-Armenta A, Huerta-Ocampo JA, López-Zavala AA, Pacheco-Aguilar R, Sotelo-Mundo RR, Corona-Martínez DO, Ramírez-Suárez JC. Review of the Greening Reaction by Thermal Treatment: New Insights Exploring the Structural Implications of Myoglobin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:17485-17493. [PMID: 37943570 DOI: 10.1021/acs.jafc.3c02109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Myoglobin is the main factor responsible for muscle pigmentation in tuna; muscle color depends upon changes in the oxidative state of myoglobin. The tuna industry has reported muscle greening after thermal treatment involving metmyoglobin (MetMb), trimethylamine oxide (TMAO), and free cysteine (Cys). It has been proposed that this pigmentation change is due to a disulfide bond between a unique cysteine residue (Cys10) found in tuna MetMb and free Cys. However, no evidence has been given to confirm that this reaction occurs. In this review, new findings about the mechanism of this greening reaction are discussed, showing evidence of how free radicals produced from Cys oxidation under thermal treatment participate in the greening of tuna and horse muscle during thermal treatment. In addition, the reaction conditions are compared to other green myoglobins, such as sulfmyoglobin, verdomyoglobin, and cholemyoglobin.
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Affiliation(s)
- Andrés Álvarez-Armenta
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), 83304, Hermosillo, Sonora, Mexico
| | - Jose A Huerta-Ocampo
- Laboratorio de Bioquímica de Proteínas y Glicanos, Consejo Nacional de Humanidades, Ciencias y Tecnologías (CONAHCYT)-Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), 83304, Hermosillo, Sonora, Mexico
| | - Alonso A López-Zavala
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, 83000, Hermosillo, Sonora, Mexico
| | - Ramón Pacheco-Aguilar
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), 83304, Hermosillo, Sonora, Mexico
| | - Rogerio R Sotelo-Mundo
- Laboratorio de Estructura Biomolecular, Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), 83304, Hermosillo, Sonora, Mexico
| | - David O Corona-Martínez
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, 83000, Hermosillo, Sonora, Mexico
| | - Juan Carlos Ramírez-Suárez
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), 83304, Hermosillo, Sonora, Mexico
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Álvarez-Armenta A, Corona-Martínez DO, Pacheco-Aguilar R, López-Zavala AA, Sotelo-Mundo RR, García-Sánchez G, Ramírez-Suárez JC. Sulfmyoglobin production by free cysteine during thermal treatment: Involvement of heme iron in the production of free radicals. Food Chem 2023; 408:135165. [PMID: 36527926 DOI: 10.1016/j.foodchem.2022.135165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/23/2022] [Accepted: 12/04/2022] [Indexed: 12/14/2022]
Abstract
The meat greening is an abnormal pigmentation related to microbiological contamination and lipid oxidation during storage. This color change results from sulfmyoglobin (SulfMb) production promoted by the reaction between metmyoglobin (MetMb), H2O2, and thiol compounds. Spectral studies on cooked meat suggested the production of SulfMb, probably due to the increment of free radicals during thermal treatment. Thus, we evaluated the involvement of free radicals and heme iron in the SulfMb production from horse MetMb and free cysteine (Cys) during thermal treatment. The results confirm that the reaction of SulfMb production at meat muscle pH (5.7-7.2) during heat treatment is a product of free radicals formed from Cys oxidation (SH) and reactive oxygen species (O2-, H2O2). This is catalyzed by the release of heme iron, thus promoting a consecutive reaction having MbFe(IV)O as a reaction intermediate.
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Affiliation(s)
- Andrés Álvarez-Armenta
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C., 83304 Hermosillo, Sonora, Mexico
| | - David O Corona-Martínez
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, 83000 Hermosillo, Sonora, Mexico
| | - Ramón Pacheco-Aguilar
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C., 83304 Hermosillo, Sonora, Mexico
| | - Alonso A López-Zavala
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, 83000 Hermosillo, Sonora, Mexico
| | - Rogerio R Sotelo-Mundo
- Laboratorio de Estructura Molecular, Centro de Investigación en Alimentación y Desarrollo, A.C, 83304 Hermosillo, Sonora, Mexico
| | - Guillermina García-Sánchez
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C., 83304 Hermosillo, Sonora, Mexico
| | - Juan Carlos Ramírez-Suárez
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Centro de Investigación en Alimentación y Desarrollo, A.C., 83304 Hermosillo, Sonora, Mexico.
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Verde C, Giordano D, Bruno S. NO and Heme Proteins: Cross-Talk between Heme and Cysteine Residues. Antioxidants (Basel) 2023; 12:antiox12020321. [PMID: 36829880 PMCID: PMC9952723 DOI: 10.3390/antiox12020321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
Heme proteins are a diverse group that includes several unrelated families. Their biological function is mainly associated with the reactivity of the heme group, which-among several other reactions-can bind to and react with nitric oxide (NO) and other nitrogen compounds for their production, scavenging, and transport. The S-nitrosylation of cysteine residues, which also results from the reaction with NO and other nitrogen compounds, is a post-translational modification regulating protein activity, with direct effects on a variety of signaling pathways. Heme proteins are unique in exhibiting this dual reactivity toward NO, with reported examples of cross-reactivity between the heme and cysteine residues within the same protein. In this work, we review the literature on this interplay, with particular emphasis on heme proteins in which heme-dependent nitrosylation has been reported and those for which both heme nitrosylation and S-nitrosylation have been associated with biological functions.
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Affiliation(s)
- Cinzia Verde
- Institute of Biosciences and BioResources (IBBR), National Research Council (CNR), Via Pietro Castellino 111, 80131 Napoli, Italy
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn (SZN), Villa Comunale, 80121 Napoli, Italy
| | - Daniela Giordano
- Institute of Biosciences and BioResources (IBBR), National Research Council (CNR), Via Pietro Castellino 111, 80131 Napoli, Italy
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn (SZN), Villa Comunale, 80121 Napoli, Italy
| | - Stefano Bruno
- Department of Food and Drug, University of Parma, 43124 Parma, Italy
- Biopharmanet-TEC, University of Parma, 43124 Parma, Italy
- Correspondence:
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Yuan D, Chu J, Lin H, Zhu G, Qian J, Yu Y, Yao T, Ping F, Chen F, Liu X. Mechanism of homocysteine-mediated endothelial injury and its consequences for atherosclerosis. Front Cardiovasc Med 2023; 9:1109445. [PMID: 36727029 PMCID: PMC9884709 DOI: 10.3389/fcvm.2022.1109445] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 12/28/2022] [Indexed: 01/18/2023] Open
Abstract
Homocysteine (Hcy) is an intermediate amino acid formed during the conversion from methionine to cysteine. When the fasting plasma Hcy level is higher than 15 μmol/L, it is considered as hyperhomocysteinemia (HHcy). The vascular endothelium is an important barrier to vascular homeostasis, and its impairment is the initiation of atherosclerosis (AS). HHcy is an important risk factor for AS, which can promote the development of AS and the occurrence of cardiovascular events, and Hcy damage to the endothelium is considered to play a very important role. However, the mechanism by which Hcy damages the endothelium is still not fully understood. This review summarizes the mechanism of Hcy-induced endothelial injury and the treatment methods to alleviate the Hcy induced endothelial dysfunction, in order to provide new thoughts for the diagnosis and treatment of Hcy-induced endothelial injury and subsequent AS-related diseases.
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Álvarez-Armenta A, Pacheco-Aguilar R, López-Zavala AA, Corona-Martínez DO, Sotelo-Mundo RR, García-Orozco KD, Ramírez-Suárez JC. The greening reaction of skipjack tuna ( Katsuwonus pelamis) metmyoglobin promoted by free cysteine during thermal treatment. PeerJ 2022; 10:e13923. [PMID: 35996665 PMCID: PMC9392451 DOI: 10.7717/peerj.13923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/29/2022] [Indexed: 01/19/2023] Open
Abstract
Background Tuna muscle greening is a problem that occurs after heating. A hypothesis has been postulated to address this problem, involving a conserved Cys residue at position 10 (Cys-10) present on tuna myoglobin (Mb) that is exposed during the thermic treatment, forming a disulfide bond with free cysteine (Cys) in the presence of trimethylamine oxide (TMAO), resulting in the greening of the tuna Mb. Methods We present a study using skipjack tuna (Katsuwonus pelamis) metmyoglobin (MbFe(III)-H2O) where the effect of free Cys (1-6 mM), TMAO (1.33 mM), and catalase on the greening reaction (GR) was monitored by UV-vis spectrometry during thermal treatment at 60 °C for 30 min. Moreover, the participation of Cys-10 on the GR was evaluated after its blocking with N-ethymaleimide. Results The GR occurred in tuna MbFe(III)-H2O after heat treatment with free Cys, forming sulfmyoglobin (MbFe(II)-S) as the responsible pigment for the tuna greening. However, the rate constants of MbFe(II)-S production depended on Cys concentration (up to 4 mM) and occurred regardless of the TMAO presence. We postulate that two consecutive reactions involve an intermediate ferrylmyoglobin (promoted by H2O2) species with a subsequent MbFe(II)-S formation since the presence of catalase fosters the reduction of the rate reaction. Moreover, GR occurred even with blocked Cys-10 residues in tuna Mb and horse Mb (without Cys in its sequence). Discussion We found that GR is not exclusive to tuna Mb´s, and it can be promoted in other muscle systems. Moreover, Cys and thermal treatment are indispensable for promoting this pigmentation anomaly.
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Affiliation(s)
- Andrés Álvarez-Armenta
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Tecnología de Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo A. C., Hermosillo, Sonora, México
| | - Ramón Pacheco-Aguilar
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Tecnología de Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo A. C., Hermosillo, Sonora, México
| | - Alonso A. López-Zavala
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Hermosillo, Sonora, Mexico
| | | | - Rogerio R. Sotelo-Mundo
- Laboratorio de Estructura Molecular, Tecnología de Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo, A. C., Hermosillo, Sonora, México
| | - Karina D. García-Orozco
- Laboratorio de Estructura Molecular, Tecnología de Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo, A. C., Hermosillo, Sonora, México
| | - Juan C. Ramírez-Suárez
- Laboratorio de Bioquímica y Calidad de Productos Pesqueros, Tecnología de Alimentos de Origen Animal, Centro de Investigación en Alimentación y Desarrollo A. C., Hermosillo, Sonora, México
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Padovani D, Galardon E. Molecular Basis for the Interaction of Catalase with d-Penicillamine: Rationalization of Some of Its Deleterious Effects. Chem Res Toxicol 2022; 35:412-421. [PMID: 35191669 DOI: 10.1021/acs.chemrestox.1c00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
d-Penicillamine (d-Pen) is a sulfur compound used in the management of rheumatoid arthritis, Wilson's disease (WD), and alcohol dependence. Many side effects are associated with its use, particularly after long-term treatment. However, the molecular basis for such side effects is poorly understood. Based on the well-known oxidase activity of hemoproteins and the participation of catalase in cellular H2O2 redox signaling, we posit that d-Pen could inactivate catalase, thus disturbing H2O2 levels. Herein, we report on the molecular basis that could partly explain the side effects associated with this drug compound, and we demonstrate that it induces the formation of compound II, a temporarily inactive state of the enzyme, through two distinct mechanisms. Initially, d-Pen reacts with native catalase and/or iron metal ions, used to mimic non-heme iron overload observed in long-term treated WD patients, to generate thiyl radicals. These radicals partake in a futile redox cycle, thus producing superoxide radical anions O2•- and hydrogen peroxide H2O2. Then, either H2O2 unexpectedly reacts with reduced CAT-Fe(II) to produce compound II or both aforementioned reactive oxygen species intervene in compound II generation through compound I formation and then reduction. These findings support the evidence that d-Pen could perturb H2O2 redox homeostasis through transient but recurring catalase inactivation, which may in part rationalize some deleterious effects observed with this therapeutic agent, as discussed.
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Affiliation(s)
- Dominique Padovani
- UMR 8601, LCBPT, CNRS-Université de Paris, 45 rue des Sts Pères, 75006 Paris, France
| | - Erwan Galardon
- UMR 8601, LCBPT, CNRS-Université de Paris, 45 rue des Sts Pères, 75006 Paris, France
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Tong Y, Wang L, Song J, Zhang M, Qi H, Ding S, Qi H. Self-Terminated Electroless Deposition of Surfactant-Free and Monodispersed Pt Nanoparticles on Carbon Fiber Microelectrodes for Sensitive Detection of H 2O 2 Released from Living Cells. Anal Chem 2021; 93:16683-16689. [PMID: 34860503 DOI: 10.1021/acs.analchem.1c04299] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We report a self-terminated electroless deposition method to prepare surfactant-free and monodispersed Pt nanoparticle (NP)-modified carbon fiber microelectrodes (Pt NP/CFEs) for electrochemical detection of hydrogen peroxide (H2O2) released from living cells. The surfactant-free and monodispersed Pt NPs with a uniform size of 65 nm are spontaneously deposited on a CFE surface by immersing an exposed carbon fiber (CF) of CFE in the PtCl42- solution, in which an exposed CF can be used as the reducing agent and stabilizer. A self-terminated electroless deposition method is demonstrated, in which the density and size of Pt NPs on a CFE surface do not increase when the reaction time increases from 20 to 60 min. The self-terminated electroless deposition process not only can effectively avoid any manual electrode modification and thus largely minimize person-to-person and electrode-to-electrode deviations but also can avoid the use of any extra reductant or surfactant in the fabrication process. Therefore, Pt NPs/CFEs, with good reproducibility and sensitivity, not only exhibit high electrocatalytic activity toward the oxidation of H2O2 but also maintain the spatial resolution of CFEs. Moreover, Pt NPs/CFEs can detect H2O2 with a wide linear range of 0.5-80 μM and a low detection limit of 0.17 μM and then can be successfully applied in the monitoring of H2O2 released from RAW 264.7 cells. The self-terminated electroless deposition method can also be extended to selectively prepare other metal NP-modified CFEs, such as Au NPs/CFEs or Ag NPs/CFEs, by choosing the metal ions with higher reduction potential as precursors. This work provides a simple, straightforward, and general method for the preparation of small, surfactant-free, and monodispersed metal NP-modified CFEs with high sensitivity, reproducibility, and spatial resolution.
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Affiliation(s)
- Yuxi Tong
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Lifen Wang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, People's Republic of China
| | - Jiajia Song
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, People's Republic of China
| | - Mengyue Zhang
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Hetong Qi
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Shujiang Ding
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Honglan Qi
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, People's Republic of China
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10
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Sharma GS, Bhattacharya R, Singh LR. Functional inhibition of redox regulated heme proteins: A novel mechanism towards oxidative stress induced by homocysteine. Redox Biol 2021; 46:102080. [PMID: 34325357 PMCID: PMC8334742 DOI: 10.1016/j.redox.2021.102080] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 07/22/2021] [Indexed: 11/19/2022] Open
Abstract
Homocysteine (Hcy) is a sulfur containing non-protein toxic amino acid synthesized from methionine. Elevated level of Hcy is associated with cardiovascular complications and neurodegeneration. Hcy is believed to induce organ damage and apoptosis via oxidative stress. The pro-oxidant nature of Hcy is considered to originate from the metal-induced oxidation of thiol group-containing molecules forming disulfides (Hcy-Hcy, Hcy-cysteine, Hcy-glutathione, etc) or with free cysteine residues of proteins (a process called protein S-homocysteinylation). Formation of such disulfides indeed results in the generation of reactive oxygen species (ROS) which eventually leads to loss of cellular integrity. In the present manuscript, we performed systematic investigation of the effect of Hcy on iron containing proteins. We discover a novel mechanism of Hcy toxicity wherein Hcy oxidation is linked with the functional loss of the protein with iron as cofactors. Our results indicate that redox regulated heme proteins might be primarily involved in the Hcy toxicity and associated oxidative stress.
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Affiliation(s)
- Gurumayum Suraj Sharma
- Department of Botany, Bhaskaracharya College of Applied Sciences, University of Delhi, Delhi, 110075, India
| | - Reshmee Bhattacharya
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India
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11
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Shrestha R, Jia K, Khadka S, Eltis LD, Li P. Mechanistic Insights into DyPB from Rhodococcus jostii RHA1 Via Kinetic Characterization. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ruben Shrestha
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Kaimin Jia
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Samiksha Khadka
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Lindsay D. Eltis
- Department of Microbiology and Immunology, The University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Ping Li
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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12
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Cortese-Krott MM. Red Blood Cells as a "Central Hub" for Sulfide Bioactivity: Scavenging, Metabolism, Transport, and Cross-Talk with Nitric Oxide. Antioxid Redox Signal 2020; 33:1332-1349. [PMID: 33205994 DOI: 10.1089/ars.2020.8171] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Significance: Sulfide was revealed to be an endogenous signaling molecule regulating a plethora of cellular functions. It is involved in the regulation of fundamental processes, including blood pressure regulation, suspended animation, and metabolic activity of mitochondria, pain, and inflammation. The underlying biochemical pathways and pharmacological targets are still largely unidentified. Recent Advances: Red blood cells (RBCs) are known as oxygen transporters and were proposed to contribute to cardiovascular homeostasis by regulating nitric oxide (NO) metabolism, also via interaction of hemoglobin with nitrite and NO itself. Interestingly, recent evidence indicates that RBCs may also play a central role in systemic sulfide metabolism and homeostasis, and, potentially, in the crosstalk with NO. Heme-containing proteins such as hemoglobin were shown to be targeted by both NO and sulfide. In this article, we aim at revising and discussing the potential impact of RBCs on systemic sulfide metabolism in the cardiovascular system. Critical Issues: Although the synthetic pathways and the reactivity of hemoglobin and other heme proteins with sulfide and NO are known, the in vivo role of RBCs in sulfide metabolism, physiology, pharmacology, and its pathophysiological implications have not been characterized so far. Future Directions: To allow a better understanding of the role of RBCs in systemic sulfide metabolism and its cross-talk with NO, basic and translational science studies should be focused on dissecting the enzymatic and nonenzymatic sulfur metabolic pathways in RBCs in vivo and their impact on the cardiovascular system in animal models and clinical settings.
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Affiliation(s)
- Miriam M Cortese-Krott
- Myocardial Infarction Research Laboratory, Division of Cardiology, Pulmonology and Vascular Medicine, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany.,Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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13
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Chen L, Wu R, Feng J, Feng T, Wang C, Hu J, Zhan N, Li Y, Ma X, Ren B, Zhang J, Song CP, Li J, Zhou JM, Zuo J. Transnitrosylation Mediated by the Non-canonical Catalase ROG1 Regulates Nitric Oxide Signaling in Plants. Dev Cell 2020; 53:444-457.e5. [PMID: 32330424 DOI: 10.1016/j.devcel.2020.03.020] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 01/21/2020] [Accepted: 03/25/2020] [Indexed: 01/26/2023]
Abstract
The redox-based protein S-nitrosylation is a conserved mechanism modulating nitric oxide (NO) signaling and has been considered mainly as a non-enzymatic reaction. S-nitrosylation is regulated by the intracellular NO level that is tightly controlled by S-nitrosoglutathione reductase (GSNOR). However, the molecular mechanisms regulating S-nitrosylation selectivity remain elusive. Here, we characterize an Arabidopsis "repressor of" gsnor1 (rog1) mutation that specifically suppresses the gsnor1 mutant phenotype. ROG1, identical to the non-canonical catalase, CAT3, is a transnitrosylase that specifically modifies GSNOR1 at Cys-10. The transnitrosylase activity of ROG1 is regulated by a unique and highly conserved Cys-343 residue. A ROG1C343T mutant displays increased catalase but decreased transnitrosylase activities. Consistent with these results, the rog1 mutation compromises responses to NO under both normal and stress conditions. We propose that ROG1 functions as a transnitrosylase to regulate the NO-based redox signaling in plants.
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Affiliation(s)
- Lichao Chen
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Rong Wu
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Jian Feng
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tianpeng Feng
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Chun Wang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiliang Hu
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ni Zhan
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Yansha Li
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaohui Ma
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Bo Ren
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jian Zhang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Chun-Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, Collaborative Innovation Center of Crop Stress Biology, Henan University, Kaifeng 475001, China
| | - Jiayang Li
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Jian-Min Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Biotic Interactions, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jianru Zuo
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Beijing 100101, China.
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14
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Georgiou-Siafis SK, Samiotaki MK, Demopoulos VJ, Panayotou G, Tsiftsoglou AS. Formation of novel N-acetylcysteine-hemin adducts abrogates hemin-induced cytotoxicity and suppresses the NRF2-driven stress response in human pro-erythroid K562 cells. Eur J Pharmacol 2020; 880:173077. [PMID: 32222495 DOI: 10.1016/j.ejphar.2020.173077] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 01/28/2023]
Abstract
Heme (iron protoporphyrin IX), as the prosthetic group in hemoproteins, regulates vital cellular functions in human tissues. However, free heme released during hemolysis events promotes severe complications to millions of people worldwide. Over the years, thiols like glutathione (GSH) were known to antagonize heme toxicity. In this study, we have uncovered the underlying molecular mechanism by which N-acetylcysteine (NAC), a well-known thiol prevents hemin-induced cytotoxicity (HIC). Hemin-responsive human pro-erythroid K562 cells were employed to assess hemin intracellular accumulation and cytotoxicity at concentrations ≥50 μΜ, in cultures exposed only to hemin and/or both hemin and NAC. NAC inhibited the intracellular accumulation of hemin and prevented hemin-induced cell growth inhibition, cell death, oxidative stress, and accumulation of ubiquitinated proteins. Meanwhile, the activation of the NF-E2-related factor-2 (NRF2)-driven stress gene activation, a key element involved in HIC, was suppressed by NAC. A refined mechanism of the chemical reaction between NAC and hemin leading to adduct formation via a nucleophilic attack on hemin was uncovered for the first time by tandem mass spectrometry analysis (LC-MS/MS). Such thiol-hemin adducts acted as intermediates to mitigate HIC and to suppress hemin-induced NRF2-driven gene activation. Our findings support the concept that NAC-hemin adduct formation is the major novel molecular mechanism rather than the reactive oxygen species-scavenging capacity of thiols to protect cells from HIC. Our results imply that thiols and their derivatives can be of potential therapeutic value in hemolytic disorders.
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Affiliation(s)
- Sofia K Georgiou-Siafis
- Laboratory of Pharmacology Department of Pharmaceutical Sciences, School of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, 54124, Greece
| | | | - Vassilis J Demopoulos
- Laboratory of Pharmaceutical Chemistry, Department of Pharmaceutical Sciences, School of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, 54124, Greece
| | | | - Asterios S Tsiftsoglou
- Laboratory of Pharmacology Department of Pharmaceutical Sciences, School of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, 54124, Greece.
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15
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Elevated cerebrospinal fluid homocysteine is associated with blood-brain barrier disruption in amyotrophic lateral sclerosis patients. Neurol Sci 2020; 41:1865-1872. [DOI: 10.1007/s10072-020-04292-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 02/11/2020] [Indexed: 12/12/2022]
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16
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Rodriguez-Mackenzie AD, Arbelo-Lopez HD, Wymore T, Lopez-Garriga J. A reaction pathway to compound 0 intermediates in oxy-myoglobin through interactions with hydrogen sulfide and His64. J Mol Graph Model 2019; 94:107465. [PMID: 31670138 DOI: 10.1016/j.jmgm.2019.107465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/25/2019] [Accepted: 10/01/2019] [Indexed: 11/18/2022]
Abstract
Myoglobin (Mb) binds oxygen with high affinity as a low spin singlet complex and thus functions as an oxygen storage protein. Yet, hybrid Density Functional Theory/Molecular Mechanical (DFT/MM) calculations of oxy-Mb models predict that the O2 bond is much less resistant to breaking in the presence of hydrogen sulfide (H2S) compared with water. Specifically, a hydrogen atom from H2S can be transferred to the distal oxygen atom through homolytic cleavage of the S-H bond to form the intermediate Compound (Cpd) 0 structure and a thiyl radical. In the presence of a neutral His64 (Nε protonation, His64-ε) and H2S, only a metastable Cpd 0 would be formed as the active site is devoid of any additional proton donor to fully break the O2 bond. In contrast, the calculations predict that the triplet state is significantly favored over the open shell singlet diradical state throughout the entire reaction coordinate in the presence of H2S and a positively charged His64. Furthermore, a positively charged His64 can readily donate a proton to Cpd 0 to fully break the O2 bond resulting in a configuration analogous to reported reaction models of a hemoglobin mutant bound to H2O2 with H2S present. Typically, exotic techniques are required to generate Cpd 0 but under the conditions just described the intermediate is readily detected in UV-Vis spectra at room temperature. The effect is observed as a 2 nm red shift of the Soret band from 414 nm to 416 nm (pH 5.0, His64-εδ) and from 416 nm to 418 nm (pH 6.6, His64-ε).
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Affiliation(s)
| | - Hector D Arbelo-Lopez
- Department of Chemistry, University of Puerto Rico Mayaguez Campus, Mayaguez, 00680, Puerto Rico
| | - Troy Wymore
- Department of Chemistry, University of Michigan, Ann Arbor, MI, 48109-1055, United States.
| | - Juan Lopez-Garriga
- Department of Chemistry, University of Puerto Rico Mayaguez Campus, Mayaguez, 00680, Puerto Rico.
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17
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Mot AC, Puscas C, Dorneanu SA, Silaghi-Dumitrescu R. EPR detection of sulfanyl radical during sulfhemoglobin formation - Influence of catalase. Free Radic Biol Med 2019; 137:110-115. [PMID: 31035002 DOI: 10.1016/j.freeradbiomed.2019.04.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/24/2019] [Accepted: 04/25/2019] [Indexed: 12/18/2022]
Abstract
Hemoglobin in its ferryl form oxidizes hydrogen sulfide and is transformed to sulfhemoglobin, where the sulfur is inserted covalently at the heme edge. Shown here is evidence that-as previously proposed by others-this process involves oxidation of hydrogen sulfide to a sulfanyl radical detectable by spin-trapping in electron paramagnetic resonance (EPR) spectroscopy. The yields and rates of formation of sulfhemoglobin as well as of the sulfanyl radical are affected by the same factors that affect the reactivity of hemoglobin ferryl, in bovine hemoglobin and in phytoglobins as well. A freely-diffusing sulfanyl radical is thus proposed to be involved in sulfhemoglobin formation. Catalase is shown to accelerate this process due to a previously described hydrogen sulfide oxidase activity, within which EPR evidence for sulfanyl generation is shown here for the first time. The reaction of preformed ferryl with hydrogen sulfide-in absence of hydrogen peroxide-is studied by stopped-flow at several pH values and explained in light of reactivity and redox potential control.
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Affiliation(s)
- Augustin C Mot
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania.
| | - Cristina Puscas
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania
| | - Sorin Aurel Dorneanu
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania
| | - Radu Silaghi-Dumitrescu
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania.
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18
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Bogdándi V, Ida T, Sutton TR, Bianco C, Ditrói T, Koster G, Henthorn HA, Minnion M, Toscano JP, van der Vliet A, Pluth MD, Feelisch M, Fukuto JM, Akaike T, Nagy P. Speciation of reactive sulfur species and their reactions with alkylating agents: do we have any clue about what is present inside the cell? Br J Pharmacol 2019; 176:646-670. [PMID: 29909607 PMCID: PMC6346080 DOI: 10.1111/bph.14394] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/18/2018] [Accepted: 06/05/2018] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND AND PURPOSE: Posttranslational modifications of cysteine residues represent a major aspect of redox biology, and their reliable detection is key in providing mechanistic insights. The metastable character of these modifications and cell lysis-induced artifactual oxidation render current state-of-the-art protocols to rely on alkylation-based stabilization of labile cysteine derivatives before cell/tissue rupture. An untested assumption in these procedures is that for all cysteine derivatives, alkylation rates are faster than their dynamic interchange. However, when the interconversion of cysteine derivatives is not rate limiting, electrophilic labelling is under Curtin-Hammett control; hence, the final alkylated mixture may not represent the speciation that prevailed before alkylation. EXPERIMENTAL APPROACH Buffered aqueous solutions of inorganic, organic, cysteine, GSH and GAPDH polysulfide species were used. Additional experiments in human plasma and serum revealed that monobromobimane can extract sulfide from the endogenous sulfur pool by shifting speciation equilibria, suggesting caution should be exercised when interpreting experimental results using this tool. KEY RESULTS In the majority of cases, the speciation of alkylated polysulfide/thiol derivatives depended on the experimental conditions. Alkylation perturbed sulfur speciation in both a concentration- and time-dependent manner and strong alkylating agents cleaved polysulfur chains. Moreover, the labelling of sulfenic acids with dimedone also affected cysteine speciation, suggesting that part of the endogenous pool of products previously believed to represent sulfenic acid species may represent polysulfides. CONCLUSIONS AND IMPLICATIONS We highlight methodological caveats potentially arising from these pitfalls and conclude that current derivatization strategies often fail to adequately capture physiological speciation of sulfur species. LINKED ARTICLES This article is part of a themed section on Chemical Biology of Reactive Sulfur Species. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.4/issuetoc.
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Affiliation(s)
- Virág Bogdándi
- Department of Molecular Immunology and ToxicologyNational Institute of OncologyBudapestHungary
| | - Tomoaki Ida
- Department of Environmental Medicine and Molecular ToxicologyTohoku University Graduate School of MedicineSendaiJapan
| | - Thomas R Sutton
- Clinical and Experimental Sciences, Faculty of MedicineUniversity Hospital Southampton NHS Foundation Trust, University of SouthamptonSouthamptonUK
| | | | - Tamás Ditrói
- Department of Molecular Immunology and ToxicologyNational Institute of OncologyBudapestHungary
| | - Grielof Koster
- Clinical and Experimental Sciences, Faculty of MedicineUniversity Hospital Southampton NHS Foundation Trust, University of SouthamptonSouthamptonUK
| | - Hillary A Henthorn
- Department of Chemistry and Biochemistry, Materials Science Institute, Institute of Molecular BiologyUniversity of OregonEugeneORUSA
| | - Magda Minnion
- Clinical and Experimental Sciences, Faculty of MedicineUniversity Hospital Southampton NHS Foundation Trust, University of SouthamptonSouthamptonUK
| | - John P Toscano
- Department of ChemistryJohns Hopkins UniversityBaltimoreMDUSA
| | - Albert van der Vliet
- Department of Pathology and Laboratory Medicine, Robert Larner, M.D. College of MedicineUniversity of VermontBurlingtonVTUSA
| | - Michael D Pluth
- Department of Chemistry and Biochemistry, Materials Science Institute, Institute of Molecular BiologyUniversity of OregonEugeneORUSA
| | - Martin Feelisch
- Clinical and Experimental Sciences, Faculty of MedicineUniversity Hospital Southampton NHS Foundation Trust, University of SouthamptonSouthamptonUK
| | - Jon M Fukuto
- Department of ChemistrySonoma State UniversityRohnert ParkCAUSA
| | - Takaaki Akaike
- Department of Environmental Medicine and Molecular ToxicologyTohoku University Graduate School of MedicineSendaiJapan
| | - Péter Nagy
- Department of Molecular Immunology and ToxicologyNational Institute of OncologyBudapestHungary
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19
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Sharma S, Samal RR, Subudhi U, Chainy GB. Lanthanum chloride-induced conformational changes of bovine liver catalase: A computational and biophysical study. Int J Biol Macromol 2018; 115:853-860. [DOI: 10.1016/j.ijbiomac.2018.04.116] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/18/2018] [Accepted: 04/23/2018] [Indexed: 12/17/2022]
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20
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Arbelo-López HD, Rodriguez-Mackenzie AD, Roman-Morales EM, Wymore T, López-Garriga J. Charge Transfer and π to π* Transitions in the Visible Spectra of Sulfheme Met Isomeric Structures. J Phys Chem B 2018; 122:4947-4955. [PMID: 29689164 DOI: 10.1021/acs.jpcb.7b12393] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Since the 1863 discovery of a new green hemoglobin derivative called "sulfhemoglobin", the nature of the characteristic 618 nm absorption band has been the subject of several hypotheses. The experimental spectra are a function of the observation time and interplay between two major sulfheme isomer concentrations (a three- and five-membered ring adduct), with the latter being the dominant isomer at longer times. Thus, time-dependent density functional theory (TDDFT) was used to calculate the sulfheme excited states and visualize the highest occupied molecular orbitals (HOMOs) and lowest unoccupied MOs (LUMOs) of both isomers in order to interpret the transitions between them. These two isomers have distinguishable a1u and a2u HOMO energies. Formation of the three-membered ring SA isomeric structure decreases the energy of the HOMO a1u and a2u orbitals compared to the unmodified heme due to the electron-withdrawing, sulfur-containing, three-membered ring. Conversely, formation of the SC isomeric structure decreases the energy of the HOMO a1u and a2u orbitals due to the electron-withdrawing, sulfur-containing, five-membered ring. The calculations reveal that the absorption spectrum within the 700 nm region arises from a mixture of MOs but can be characterized as π to π* transitions, while the 600 nm region is characterized by π to dπ (d yz, d xz) transitions having components of a deoxy-like derivative.
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Affiliation(s)
- Hector D Arbelo-López
- Chemistry Department , University of Puerto Rico Mayagüez Campus , Mayagüez , Puerto Rico
| | | | - Elddie M Roman-Morales
- Chemistry Department , University of Puerto Rico Mayagüez Campus , Mayagüez , Puerto Rico
| | - Troy Wymore
- Chemistry Department , University of Michigan , Ann Arbor , Michigan , United States
| | - Juan López-Garriga
- Chemistry Department , University of Puerto Rico Mayagüez Campus , Mayagüez , Puerto Rico
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21
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Lin YW. Structure and function of heme proteins regulated by diverse post-translational modifications. Arch Biochem Biophys 2018; 641:1-30. [DOI: 10.1016/j.abb.2018.01.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/10/2018] [Accepted: 01/13/2018] [Indexed: 01/08/2023]
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22
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Orlenko A, Moore JH, Orzechowski P, Olson RS, Cairns J, Caraballo PJ, Weinshilboum RM, Wang L, Breitenstein MK. Considerations for automated machine learning in clinical metabolic profiling: Altered homocysteine plasma concentration associated with metformin exposure. PACIFIC SYMPOSIUM ON BIOCOMPUTING. PACIFIC SYMPOSIUM ON BIOCOMPUTING 2018; 23:460-471. [PMID: 29218905 PMCID: PMC5882490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
With the maturation of metabolomics science and proliferation of biobanks, clinical metabolic profiling is an increasingly opportunistic frontier for advancing translational clinical research. Automated Machine Learning (AutoML) approaches provide exciting opportunity to guide feature selection in agnostic metabolic profiling endeavors, where potentially thousands of independent data points must be evaluated. In previous research, AutoML using high-dimensional data of varying types has been demonstrably robust, outperforming traditional approaches. However, considerations for application in clinical metabolic profiling remain to be evaluated. Particularly, regarding the robustness of AutoML to identify and adjust for common clinical confounders. In this study, we present a focused case study regarding AutoML considerations for using the Tree-Based Optimization Tool (TPOT) in metabolic profiling of exposure to metformin in a biobank cohort. First, we propose a tandem rank-accuracy measure to guide agnostic feature selection and corresponding threshold determination in clinical metabolic profiling endeavors. Second, while AutoML, using default parameters, demonstrated potential to lack sensitivity to low-effect confounding clinical covariates, we demonstrated residual training and adjustment of metabolite features as an easily applicable approach to ensure AutoML adjustment for potential confounding characteristics. Finally, we present increased homocysteine with long-term exposure to metformin as a potentially novel, non-replicated metabolite association suggested by TPOT; an association not identified in parallel clinical metabolic profiling endeavors. While warranting independent replication, our tandem rank-accuracy measure suggests homocysteine to be the metabolite feature with largest effect, and corresponding priority for further translational clinical research. Residual training and adjustment for a potential confounding effect by BMI only slightly modified the suggested association. Increased homocysteine is thought to be associated with vitamin B12 deficiency - evaluation for potential clinical relevance is suggested. While considerations for clinical metabolic profiling are recommended, including adjustment approaches for clinical confounders, AutoML presents an exciting tool to enhance clinical metabolic profiling and advance translational research endeavors.
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Affiliation(s)
- Alena Orlenko
- Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, PA, USA
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23
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Garai D, Ríos-González BB, Furtmüller PG, Fukuto JM, Xian M, López-Garriga J, Obinger C, Nagy P. Mechanisms of myeloperoxidase catalyzed oxidation of H 2S by H 2O 2 or O 2 to produce potent protein Cys-polysulfide-inducing species. Free Radic Biol Med 2017; 113:551-563. [PMID: 29097214 DOI: 10.1016/j.freeradbiomed.2017.10.384] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 10/12/2017] [Accepted: 10/26/2017] [Indexed: 01/08/2023]
Abstract
The interaction of heme proteins with hydrogen sulfide is gaining attention as an important element in sulfide-mediated protection against oxidative stress and in regulation of redox signaling. In our previous study we reported the efficient reversible inhibition of myeloperoxidase (MPO) activity by sulfide and the kinetics of the reactions of sulfide with ferric MPO, Compound I and Compound II. Here we provide several lines of evidence that a central intermediate species in the turnover of MPO by sulfide is the Compound III state. Compound III is formed in the reactions of sulfide with ferric or ferrous MPO in the presence of oxygen or via the reductions of Compound I or Compound II by sulfide. The regeneration of active ferric MPO from Compound III is slow - representing the rate-limiting step during turnover - but facilitated by ascorbate or superoxide dismutase. These catalytic cycles produce inorganic sulfane sulfur species, which were shown to promote protein Cys persulfidation. Based on compiling experimental data we propose that in contrast to hemoglobin, myoglobin, catalase or lactoperoxidase the formation of a sulfheme derivative in the oxidative interactions of sulfide with MPO is not a major pathway. Using the Met243Val mutant we demonstrated that the sulfonium ion linkage of the Met243 sulfur to the heme pyrrole ring A, which is a unique feature of MPO, is pivotal in the catalytic oxidation of sulfide via Compound III. The proposed novel MPO-catalyzed sulfide oxidation model does not require the initial presence of hydrogen peroxide, only oxygen to provide a slow flux of sulfane sulfur species generation, which could be important in sulfide-mediated endogenous signaling. Furthermore, peroxide-induced formation of sulfane sulfur species by MPO may have a role in protection of regulatory or functional Cys residues during (for example neutrophil induced) inflammatory oxidative stress.
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Affiliation(s)
- Dorottya Garai
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Ráth György utca 7-9, Budapest 1122, Hungary
| | - Bessie B Ríos-González
- Department of Chemistry, University of Puerto Rico, Mayagüez Campus, P.O. Box 9019, Mayagüez, PR 00681-9019, United States
| | - Paul G Furtmüller
- Division of Biochemistry, Department of Chemistry, Vienna Institute of BioTechnology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Jon M Fukuto
- Department of Chemistry, Sonoma State University, Rohnert Park, CA 94928, United States
| | - Ming Xian
- Department of Chemistry, Washington State University, Pullman, WA 99164, United States
| | - Juan López-Garriga
- Department of Chemistry, University of Puerto Rico, Mayagüez Campus, P.O. Box 9019, Mayagüez, PR 00681-9019, United States
| | - Christian Obinger
- Division of Biochemistry, Department of Chemistry, Vienna Institute of BioTechnology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Péter Nagy
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Ráth György utca 7-9, Budapest 1122, Hungary.
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24
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Padovani D. Un nouveau lien entre des taux élevés d’homocystéine, les cancers et les maladies neurodégénératives. Med Sci (Paris) 2017; 33:494-497. [DOI: 10.1051/medsci/20173305012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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25
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Galardon E, Huguet F, Herrero C, Ricoux R, Artaud I, Padovani D. Reactions of persulfides with the heme cofactor of oxidized myoglobin and microperoxidase 11: reduction or coordination. Dalton Trans 2017; 46:7939-7946. [DOI: 10.1039/c7dt01638g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Persulfides reduce both met- and ferryl-oxidized forms of myoglobin, and coordinate to N-acetylated microperoxidase-11.
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Affiliation(s)
- Erwan Galardon
- UMR 8601
- LCBPT
- CNRS-Université Paris Descartes
- 75006 Paris
- France
| | - Florian Huguet
- UMR 8601
- LCBPT
- CNRS-Université Paris Descartes
- 75006 Paris
- France
| | - Christian Herrero
- UMR 8182
- ICMMO
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Université Paris-Sud
- 91405 Orsay Cedex
| | - Rémy Ricoux
- UMR 8182
- ICMMO
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Université Paris-Sud
- 91405 Orsay Cedex
| | - Isabelle Artaud
- UMR 8601
- LCBPT
- CNRS-Université Paris Descartes
- 75006 Paris
- France
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