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Seregin IV, Kozhevnikova AD. Phytochelatins: Sulfur-Containing Metal(loid)-Chelating Ligands in Plants. Int J Mol Sci 2023; 24:2430. [PMID: 36768751 PMCID: PMC9917255 DOI: 10.3390/ijms24032430] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023] Open
Abstract
Phytochelatins (PCs) are small cysteine-rich peptides capable of binding metal(loid)s via SH-groups. Although the biosynthesis of PCs can be induced in vivo by various metal(loid)s, PCs are mainly involved in the detoxification of cadmium and arsenic (III), as well as mercury, zinc, lead, and copper ions, which have high affinities for S-containing ligands. The present review provides a comprehensive account of the recent data on PC biosynthesis, structure, and role in metal(loid) transport and sequestration in the vacuoles of plant cells. A comparative analysis of PC accumulation in hyperaccumulator plants, which accumulate metal(loid)s in their shoots, and in the excluders, which accumulate metal(loid)s in their roots, investigates the question of whether the endogenous PC concentration determines a plant's tolerance to metal(loid)s. Summarizing the available data, it can be concluded that PCs are not involved in metal(loid) hyperaccumulation machinery, though they play a key role in metal(loid) homeostasis. Unraveling the physiological role of metal(loid)-binding ligands is a fundamental problem of modern molecular biology, plant physiology, ionomics, and toxicology, and is important for the development of technologies used in phytoremediation, biofortification, and phytomining.
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Affiliation(s)
- Ilya V. Seregin
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya St., 35, 127276 Moscow, Russia
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Dennis KK, Uppal K, Liu KH, Ma C, Liang B, Go YM, Jones DP. Phytochelatin database: a resource for phytochelatin complexes of nutritional and environmental metals. DATABASE-THE JOURNAL OF BIOLOGICAL DATABASES AND CURATION 2020; 2019:5527149. [PMID: 31267134 PMCID: PMC6606759 DOI: 10.1093/database/baz083] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 05/27/2019] [Accepted: 05/29/2019] [Indexed: 12/28/2022]
Abstract
Phytochelatins (PyCs) are a diverse set of plant compounds that chelate metals, protect against metal toxicity and function in metal homeostasis. PyCs are present in plants consumed as food by humans and could, in principle, impact absorption and utilization of essential and toxic metals such as selenium and cadmium, respectively. PyCs vary in terminal amino acid composition and chain length, exist in multiple oxidation states and reversibly bind multiple metals; consequently, PyCs include a large set of possible structures. Although individual PyC-metal complexes have been studied, no resource exists to characterize the diversity of PyCs and PyC-metal complexes. We used the scientific literature to develop a database of elemental formulas for polymer forms varying in chain length from 2 to 11 glutamyl-cysteine repeats. Using elemental formulas, we calculated monoisotopic masses using the most abundant isotopes of each element and calculated masses for complexes with 13 metals of nutritional and toxicological significance. The resulting phytochelatin database (PyCDB) contains 46 260 unique elemental formulas for PyC and PyC-metal complexes. The database is available online for download as well as for direct mass queries for mass spectrometry using an accurate mass annotation tool for user-selected PyC types, metals and adducts of interest. We performed studies of a commonly consumed food—onion—to validate the database and test utility of the tool. Onion samples were analyzed using ultra-high resolution mass spectrometry-based metabolomics. Mass spectral features were annotated using the PyCDB web tool and the R package, xMSannotator; annotated features were further validated by collision-induced dissociation mass spectrometry. The results establish use and a workflow for PyCDB as a resource for characterization of PyCs and PyC-metal complexes.
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Affiliation(s)
- Kristine K Dennis
- Nutrition and Health Sciences, Laney Graduate School, Emory University, Atlanta, GA, USA.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Karan Uppal
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Ken H Liu
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Chunyu Ma
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Bill Liang
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Young-Mi Go
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
| | - Dean P Jones
- Nutrition and Health Sciences, Laney Graduate School, Emory University, Atlanta, GA, USA.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, USA
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Spisso A, Verni E, Nahan K, Martinez L, Landero J, Pacheco P. The metabolic effects of mercury during the biological cycle of vines (Vitis vinifera). Biometals 2018; 31:243-254. [PMID: 29508101 DOI: 10.1007/s10534-018-0084-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 02/10/2018] [Indexed: 10/17/2022]
Abstract
Mercury (Hg) is a major environmental pollutant that can be disposed to the environment by human activities, reaching crops like vineyards during irrigation with contaminated waters. A 2-year study was performed to monitor Hg variations during reproductive and vegetative stages of vines after Hg supplementation. Variations were focused on total Hg concentration, the molecular weight of Hg fractions and Hg-proteins associations in roots, stems and leaves. Total Hg concentrations increased during reproductive stages and decreased during vegetative stages. Variations in length of these stages were observed, according to an extension of the vegetative period. Six months post Hg administration, in roots, stems and leaves, initial Hg proteic fractions of 200 kDa were catabolized to 66 kDa fractions according to a transition from reproductive to vegetative stages. However, 24 months after Hg supplementation, the 66 kDa Hg proteic fraction was continuously determined in a prolonged senescence. Accordingly, the identified proteins associated to Hg show catabolic functions such as endopeptidases, hydrolases, glucosidases and nucleosidases. Stress associated proteins, like peroxidase and chitinase were also found associated to Hg. During the reproductive periods of vines, Hg was associated to membrane proteins, such as ATPases and lipid transfer proteins, especially in roots where Hg is absorbed.
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Affiliation(s)
- Adrián Spisso
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, 5700, San Luis, Argentina
| | - Ernesto Verni
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, 5700, San Luis, Argentina
| | - Keaton Nahan
- Department of Chemistry, University of Cincinnati/Agilent Technologies, Metallomics Center of the Americas, University of Cincinnati, Cincinnati, USA
| | - Luis Martinez
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, 5700, San Luis, Argentina
| | - Julio Landero
- Department of Chemistry, University of Cincinnati/Agilent Technologies, Metallomics Center of the Americas, University of Cincinnati, Cincinnati, USA
| | - Pablo Pacheco
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, 5700, San Luis, Argentina.
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Yu S, Bian Y, Zhou R, Mou R, Chen M, Cao Z. Robust method for the analysis of phytochelatins in rice by high-performance liquid chromatography coupled with electrospray tandem mass spectrometry based on polymeric column materials. J Sep Sci 2015; 38:4146-52. [PMID: 26541262 DOI: 10.1002/jssc.201500557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 09/23/2015] [Accepted: 09/27/2015] [Indexed: 12/26/2022]
Abstract
A sensitive and robust high-performance liquid chromatography coupled with electrospray tandem mass spectrometry method for the identification and quantification of glutathione and phytochelatins from rice was developed. Homogenized samples were extracted with water containing 100 mM dithiothreitol, and solid-phase extraction using polymer anion exchange resin was employed for sample purification. Chromatography was performed on a polymeric column with acetonitrile and water containing 0.1% formic acid as the mobile phase at the flow rate of 300 μL/min. The limit of quantitation was 6-100 nM. This assay showed excellent linearity for both glutathione and phytochelatins over physiological normal ranges, with correlation coefficients (r) > 0.9976. Recoveries for four biothiols were within the range of 76-118%, within relative standard deviations less than 15%. The intraday precision (n = 7) was 2.1-13.3%, and the interday precision over 15 days was 4.3-15.2%. The optimized method was applied to analyze tissue samples from rice grown using nutrient solutions with three different cadmium concentrations (0, 50, and 100 μM). With increasing cadmium concentrations, the content of phytochelatin 2 and phytochelatin 3 in rice roots increased, in contrast to most phytochelatins, and the content of glutathione in rice stems and roots decreased significantly.
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Affiliation(s)
- Shasha Yu
- Rice Product Quality Inspection and Supervision Center of Ministry of Agriculture, China National Rice Research Institute, Hangzhou, China
| | - Yingfang Bian
- Rice Product Quality Inspection and Supervision Center of Ministry of Agriculture, China National Rice Research Institute, Hangzhou, China
| | - Rong Zhou
- Rice Product Quality Inspection and Supervision Center of Ministry of Agriculture, China National Rice Research Institute, Hangzhou, China
| | - Renxiang Mou
- Rice Product Quality Inspection and Supervision Center of Ministry of Agriculture, China National Rice Research Institute, Hangzhou, China
| | - Mingxue Chen
- Rice Product Quality Inspection and Supervision Center of Ministry of Agriculture, China National Rice Research Institute, Hangzhou, China
| | - Zhaoyun Cao
- Rice Product Quality Inspection and Supervision Center of Ministry of Agriculture, China National Rice Research Institute, Hangzhou, China
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Serrano N, Díaz-Cruz JM, Ariño C, Esteban M. Recent contributions to the study of phytochelatins with an analytical approach. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2015.04.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Torres S, Gil R, Silva MF, Pacheco P. Determination of seleno-amino acids bound to proteins in extra virgin olive oils. Food Chem 2015; 197:400-5. [PMID: 26616967 DOI: 10.1016/j.foodchem.2015.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/22/2015] [Accepted: 10/01/2015] [Indexed: 12/12/2022]
Abstract
An analytical method has been developed to determine seleno-amino acids in proteins extracted from extra virgin olive oils (EVOOs). Different aqueous/organic solvents were tested to isolate proteins, an acetone:n-hexane combination being the best protein precipitant. In a first dimension chromatography, extracted proteins were analysed by size exclusion chromatography (SEC) coupled to inductively coupled plasma mass spectrometry (ICP-MS) to identify S and Se associations as proteins marker. Two fractions of 66 kDa (A) and 443 kDa (B) were identified. These fractions were submitted to microwave-assisted acid hydrolysis (MAAH) to release seleno-amino acids. In a second dimension chromatography seleno-amino acids were determined by reversed-phase chromatography (RPC) coupled to ICP-MS. Seleno-methylselenocysteine was determined with values ranging from 1.03-2.03±0.2 μg kg(-1) and selenocysteine at a concentration of 1.47±0.1 μg kg(-1). Variations of protein and seleno-amino acid concentrations were observed between EVOO varieties, contributing to EVOO cultivar differentiation.
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Affiliation(s)
- Sabier Torres
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, CP 5700 San Luis, Argentina
| | - Raul Gil
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, CP 5700 San Luis, Argentina
| | - María Fernanda Silva
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Almirante Brown 500, Chacras de Coria CP 5505, Mendoza, Argentina.
| | - Pablo Pacheco
- Instituto de Química de San Luis (INQUISAL-CONICET), Chacabuco y Pedernera, CP 5700 San Luis, Argentina.
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Anjum NA, Hasanuzzaman M, Hossain MA, Thangavel P, Roychoudhury A, Gill SS, Rodrigo MAM, Adam V, Fujita M, Kizek R, Duarte AC, Pereira E, Ahmad I. Jacks of metal/metalloid chelation trade in plants-an overview. FRONTIERS IN PLANT SCIENCE 2015; 6:192. [PMID: 25883598 PMCID: PMC4382971 DOI: 10.3389/fpls.2015.00192] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 03/10/2015] [Indexed: 05/18/2023]
Abstract
Varied environmental compartments including soils are being contaminated by a myriad toxic metal(loid)s (hereafter termed as "metal/s") mainly through anthropogenic activities. These metals may contaminate food chain and bring irreparable consequences in human. Plant-based approach (phytoremediation) stands second to none among bioremediation technologies meant for sustainable cleanup of soils/sites with metal-contamination. In turn, the capacity of plants to tolerate potential consequences caused by the extracted/accumulated metals decides the effectiveness and success of phytoremediation system. Chelation is among the potential mechanisms that largely govern metal-tolerance in plant cells by maintaining low concentrations of free metals in cytoplasm. Metal-chelation can be performed by compounds of both thiol origin (such as GSH, glutathione; PCs, phytochelatins; MTs, metallothioneins) and non-thiol origin (such as histidine, nicotianamine, organic acids). This paper presents an appraisal of recent reports on both thiol and non-thiol compounds in an effort to shed light on the significance of these compounds in plant-metal tolerance, as well as to provide scientific clues for the advancement of metal-phytoextraction strategies.
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Affiliation(s)
- Naser A. Anjum
- Centre for Environmental and Marine Studies and Department of Chemistry, University of AveiroAveiro, Portugal
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural UniversityDhaka, Bangladesh
| | - Mohammad A. Hossain
- Department of Genetics and Plant Breeding, Bangladesh Agricultural UniversityMymensingh, Bangladesh
| | - Palaniswamy Thangavel
- Department of Environmental Science, School of Life Sciences, Periyar UniversitySalem, India
| | - Aryadeep Roychoudhury
- Post Graduate Department of Biotechnology, St. Xavier's College (Autonomous)Kolkata, India
| | - Sarvajeet S. Gill
- Stress Physiology and Molecular Biology Lab, Centre for Biotechnology, Maharshi Dayanand UniversityRohtak, India
| | - Miguel A. Merlos Rodrigo
- Central European Institute of Technology, Brno University of TechnologyBrno, Czech Republic
- Department of Chemistry and Biochemistry, Mendel University in BrnoBrno, Czech Republic
| | - Vojtěch Adam
- Central European Institute of Technology, Brno University of TechnologyBrno, Czech Republic
- Department of Chemistry and Biochemistry, Mendel University in BrnoBrno, Czech Republic
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa UniversityMiki-cho, Japan
| | - Rene Kizek
- Central European Institute of Technology, Brno University of TechnologyBrno, Czech Republic
- Department of Chemistry and Biochemistry, Mendel University in BrnoBrno, Czech Republic
| | - Armando C. Duarte
- Centre for Environmental and Marine Studies and Department of Chemistry, University of AveiroAveiro, Portugal
| | - Eduarda Pereira
- Centre for Environmental and Marine Studies and Department of Chemistry, University of AveiroAveiro, Portugal
| | - Iqbal Ahmad
- Centre for Environmental and Marine Studies and Department of Chemistry, University of AveiroAveiro, Portugal
- Centre for Environmental and Marine Studies and Department of Biology, University of AveiroAveiro, Portugal
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