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Wei Y, Zhao H, Liu Z, Yang J, Ren J, Qu X. MOFs Modulate Copper Trafficking in Tumor Cells for Bioorthogonal Therapy. NANO LETTERS 2024; 24:1341-1350. [PMID: 38252869 DOI: 10.1021/acs.nanolett.3c04369] [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: 01/24/2024]
Abstract
In situ drug synthesis using the copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction has attracted considerable attention in tumor therapy because of its satisfactory effectiveness and reduced side-effects. However, the exogenous addition of copper catalysts can cause cytotoxicity and has hampered biomedical applications in vivo. Here, we design and synthesize a metal-organic framework (MOF) to mimic copper chaperone, which can selectively modulate copper trafficking for bioorthogonal synthesis with no need of exogenous addition of copper catalysts. Like copper chaperones, the prepared ZIF-8 copper chaperone mimics specifically bind copper ions through the formation of coordination bonds. Moreover, the copper is unloaded under the acidic environment due to the dissipation of the coordination interactions between metal ions and ligands. In this way, the cancer cell-targeted copper chaperone mimics can selectively transport copper ions into cells. Regulation of intracellular copper trafficking may inspire constructing bioorthogonal catalysis system with reduced metal cytotoxicity in live cells.
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Affiliation(s)
- Yue Wei
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Huisi Zhao
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhenqi Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jie Yang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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Pham KLJ, Schmollinger S, Merchant SS, Strenkert D. Chlamydomonas ATX1 is essential for Cu distribution to multiple cupro-enzymes and maintenance of biomass in conditions demanding cupro-enzyme-dependent metabolic pathways. PLANT DIRECT 2022; 6:e383. [PMID: 35141461 PMCID: PMC8814560 DOI: 10.1002/pld3.383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/13/2021] [Accepted: 01/10/2022] [Indexed: 06/01/2023]
Abstract
Copper (Cu) chaperones, of which yeast ATX1 is a prototype, are small proteins with a Cu(I) binding MxCxxC motif and are responsible for directing intracellular Cu toward specific client protein targets that use Cu as a cofactor. The Chlamydomonas reinhardtii ATX1 (CrATX1) was identified by its high sequence similarity with yeast ATX1. Like the yeast homologue, CrATX1 accumulates in iron-deficient cells (but is not impacted by other metal-deficiencies). N- and C-terminally YFP-ATX1 fusion proteins are distributed in the cytoplasm. Reverse genetic analysis using artificial microRNA (amiRNA) to generate lines with reduced CrATX1 abundance and CRISPR/Cpf1 to generate atx1 knockout lines validated a function for ATX1 in iron-poor cells, again reminiscent of yeast ATX1, most likely because of an impact on metalation of the multicopper oxidase FOX1, which is an important component in high-affinity iron uptake. We further identify other candidate ATX1 targets owing to reduced growth of atx1 mutant lines on guanine as a sole nitrogen source, which we attribute to loss of function of UOX1, encoding a urate oxidase, a cupro-enzyme involved in guanine assimilation. An impact of ATX1 on Cu distribution in atx1 mutants is strikingly evident by a reduced amount of intracellular Cu in all conditions probed in this work.
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Affiliation(s)
- Keegan L. J. Pham
- Department of Plant and Microbial BiologyUniversity of CaliforniaBerkeleyCaliforniaUSA
| | - Stefan Schmollinger
- California Institute for Quantitative BiosciencesUniversity of CaliforniaBerkeleyCaliforniaUSA
| | - Sabeeha S. Merchant
- Department of Plant and Microbial BiologyUniversity of CaliforniaBerkeleyCaliforniaUSA
- California Institute for Quantitative BiosciencesUniversity of CaliforniaBerkeleyCaliforniaUSA
- Department of Molecular & Cell BiologyUniversity of CaliforniaBerkeleyCaliforniaUSA
| | - Daniela Strenkert
- California Institute for Quantitative BiosciencesUniversity of CaliforniaBerkeleyCaliforniaUSA
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Li F, Liu L, Chen X, Zhang B, Li F. Dietary Copper Supplementation Increases Growth Performance by Increasing Feed Intake, Digestibility, and Antioxidant Activity in Rex Rabbits. Biol Trace Elem Res 2021; 199:4614-4623. [PMID: 33415583 DOI: 10.1007/s12011-020-02568-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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 12/27/2020] [Indexed: 10/22/2022]
Abstract
Copper is often used as a growth promoter, at the same time copper is one of the most important essential trace elements for fur animals, especially Rex rabbits. However, too much copper added to the diet may harm animal health, and copper excreted in feces can pollute the environment. In this study, 3-month-old Rex rabbits were randomly divided into four groups and fed a basal diet containing 0, 30, 60, or 120 mg/kg Cu for 5 weeks. The diet supplemented with 30 mg/kg Cu significantly increased (P < 0.05) the average daily feed intake (ADFI) and the average daily gain (ADG) and also the activity of serum Cu-Zn (zinc) superoxide dismutase and the digestibility of ether extract. Supplemental Cu up to 120 mg/kg did not significantly adversely affect the Zn metabolism of growing Rex rabbits. Overall, the data in this study indicate that 30 mg/kg is the optimal level of Cu supplementation in the diet of growing Rex rabbits. The results will provide a reference to improve the breeding of Rex rabbits and possibly other animals. In follow-up studies, the amount of copper in the diet should be reduced as much as possible from the baseline of 30 mg/kg copper.
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Affiliation(s)
- Fan Li
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, People's Republic of China
| | - Lei Liu
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, People's Republic of China
| | - Xiaoyang Chen
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, People's Republic of China
| | - Bin Zhang
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, People's Republic of China
| | - Fuchang Li
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, People's Republic of China.
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Song H, Lin B, Huang Q, Sun L, Chen J, Hu L, Zhuo K, Liao J. The Meloidogyne graminicola effector MgMO289 targets a novel copper metallochaperone to suppress immunity in rice. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:5638-5655. [PMID: 33974693 DOI: 10.1093/jxb/erab208] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 05/07/2021] [Indexed: 05/14/2023]
Abstract
Recent studies have reported that plant-parasitic nematodes facilitate their infection by suppressing plant immunity via effectors, but the inhibitory mechanisms remain poorly understood. This study found that a novel effector MgMO289 is exclusively expressed in the dorsal esophageal gland of Meloidogyne graminicola and is up-regulated at parasitic third-/fourth-stage juveniles. In planta silencing of MgMO289 substantially increased plant resistance to M. graminicola. Moreover, we found that MgMO289 interacts with a new rice copper metallochaperone heavy metal-associated plant protein 04 (OsHPP04), and that rice cytosolic COPPER/ZINC -SUPEROXIDE DISMUTASE 2 (cCu/Zn-SOD2) is the target of OsHPP04. Rice plants overexpressing OsHPP04 or MgMO289 exhibited an increased susceptibility to M. graminicola and a higher Cu/Zn-SOD activity, but lower O2•- content, when compared with wild-type plants. Meanwhile, immune response assays showed that MgMO289 could suppress host innate immunity. These findings reveal a novel pathway for a plant pathogen effector that utilizes the host O2•--scavenging system to eliminate O2•- and suppress plant immunity.
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Affiliation(s)
- Handa Song
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Borong Lin
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou, China
| | - Qiuling Huang
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Longhua Sun
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Jiansong Chen
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Lili Hu
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Kan Zhuo
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou, China
| | - Jinling Liao
- Laboratory of Plant Nematology, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
- Guangdong Eco-Engineering Polytechnic, Guangzhou, China
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Lee BY, Park JC, Kim MS, Choi BS, Kim DH, Lim JS, Yum S, Hwang UK, Nah GJ, Lee JS. The genome of the Java medaka (Oryzias javanicus): Potential for its use in marine molecular ecotoxicology. MARINE POLLUTION BULLETIN 2020; 154:111118. [PMID: 32319931 DOI: 10.1016/j.marpolbul.2020.111118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
The Java medaka (Oryzias javanicus) is distributed in tropical brackish water and is considered as an ecotoxicological experimental organism for assessing diverse pollutions and global climate change effects in the ocean. In this study, we sequenced and assembled the genome of O. javanicus using the Oxford Nanopore technique and anchored the scaffolds to the 24 genetic linkage map of a sister species Oryzias melastigma. The assembled genome consisted of 773 scaffolds including 24 LG-based scaffolds, and the estimated genome length was 846.3 Mb (N50 = 19.3 Mb), containing 24,498 genes. As detoxification processes are crucial in aquatic organisms, antioxidant-related genes including glutathione S-transferases, superoxide dismutase, catalase, and glutathione peroxidase were identified in this study. In the genome of O. javanicus, a total of 21 GSTs, 4 SODs, 1 CAT, and 7 GPxs were identified and showed high similarities between sister species O. melastigma and Oryzias latipes. In addition, despite having 8 classes of cytosolic GSTs family, medaka showed no presence of GST pi and sigma classes, which are predominantly found in carp and salmon, but not in neoteleostei. This study adds another set to genome-library of Oryzias spp. and is a useful resource for better understanding of the molecular ecotoxicology.
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Affiliation(s)
- Bo-Young Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jun Chul Park
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Min-Sub Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | | | - Duck-Hyun Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jong-Sung Lim
- NICEM, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, South Korea
| | - Seungshic Yum
- Risk Assessment Research Center, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, South Korea
| | - Un-Ki Hwang
- Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, National Institute of Fisheries Science, Incheon 46083, South Korea
| | - Gyoung Ju Nah
- NICEM, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, South Korea.
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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Hermann W. Classification and differential diagnosis of Wilson's disease. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:S63. [PMID: 31179300 PMCID: PMC6531651 DOI: 10.21037/atm.2019.02.07] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 02/01/2019] [Indexed: 12/13/2022]
Abstract
Wilson's disease is characterized by hepatic and extrapyramidal movement disorders (EPS) with variable manifestation primarily between age 5 and 45. This variability often makes an early diagnosis difficult. A classification defines different clinical variants of Wilson's disease, which enables classifying the current clinical findings and making an early tentative diagnosis. Until the unequivocal proof or an autosomal recessive disorder of the hepatic copper transporter ATP7B has been ruled out, differential diagnoses have to be examined. Laboratory-chemical parameters of copper metabolism can both be deviations from the norm not related to the disease as well as other copper metabolism disorders besides Wilson's disease. In addition to known diseases such as Menkes disease, occipital horn syndrome (OHS), Indian childhood cirrhosis (ICC) and ceruloplasmin deficiency, recently discovered disorders are taken into account. These include MEDNIK syndrome, Huppke-Brendel syndrome and CCS chaperone deficiency. Another main focus is on differential diagnoses of childhood icterus correlated with age and anaemia as well as disorders of the extrapyramidal motor system. The Kayser-Fleischer ring (KFR) is qualified as classical ophthalmologic manifestation. The recently described manganese storage disease presents another rare metabolic disorder with symptoms similar to Wilson's disease. As this overview shows, Wilson's disease fits into a broad spectrum of internal and neurological disease patterns with icterus, anaemia and EPS.
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Affiliation(s)
- Wieland Hermann
- Department of Neurology, SRO AG Spital Langenthal, Langenthal, Switzerland
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Tabelin CB, Igarashi T, Villacorte-Tabelin M, Park I, Opiso EM, Ito M, Hiroyoshi N. Arsenic, selenium, boron, lead, cadmium, copper, and zinc in naturally contaminated rocks: A review of their sources, modes of enrichment, mechanisms of release, and mitigation strategies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 645:1522-1553. [PMID: 30248873 DOI: 10.1016/j.scitotenv.2018.07.103] [Citation(s) in RCA: 175] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 07/01/2018] [Accepted: 07/05/2018] [Indexed: 05/28/2023]
Abstract
Massive and ambitious underground space development projects are being undertaken by many countries around the world to decongest megacities, improve the urban landscapes, upgrade outdated transportation networks, and expand modern railway and road systems. A number of these projects, however, reported that substantial portions of the excavated debris are oftentimes naturally contaminated with hazardous elements, which are readily released in substantial amounts once exposed to the environment. These contaminated excavation debris/spoils/mucks, loosely referred to as "naturally contaminated rocks", contain various hazardous and toxic inorganic elements like arsenic (As), selenium (Se), boron (B), and heavy metals like lead (Pb), cadmium (Cd), copper (Cu), and zinc (Zn). If left untreated, these naturally contaminated rocks could pose very serious problems not only to the surrounding ecosystem but also to people living around the construction and disposal sites. Several incidents of soil and ground/surface water contamination, for example, have been documented due to the false assumption that excavated materials are non-hazardous because they only contain background levels of environmentally regulated elements. Naturally contaminated rocks are hazardous wastes, but they still remain largely unregulated. In fact, standard leaching tests for their evaluation and classification are not yet established. In this review, we summarized all available studies in the literature about the factors and processes crucial in the enrichment, release, and migration of the most commonly encountered hazardous and toxic elements in naturally contaminated geological materials. Although our focus is on naturally contaminated rocks, analogue systems like contaminated soils, sediments, and other hazardous wastes that have been more widely studied will also be discussed. Classification schemes and leaching tests to properly identify and regulate excavated rocks that may potentially pose environmental problems will be examined. Finally, management and mitigation strategies to limit the negative effects of these hazardous wastes are introduced.
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Affiliation(s)
- Carlito Baltazar Tabelin
- Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
| | - Toshifumi Igarashi
- Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Mylah Villacorte-Tabelin
- Department of Biological Sciences, College of Science and Mathematics, Mindanao State University - Iligan Institute of Technology, Iligan City 9200, Philippines
| | - Ilhwan Park
- Division of Sustainable Resources Engineering, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Einstine M Opiso
- Geoenvironmental Engineering Group, Central Mindanao University, Maramag 8710, Bukidnon, Philippines
| | - Mayumi Ito
- Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Naoki Hiroyoshi
- Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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Abstract
Abstract
Metal ions are essential cofactors required by the proteome of organisms from any kingdom of life to correctly exert their functions. Dedicated cellular import, transport and homeostasis systems assure that the needed metal ion is correctly delivered and inserted into the target proteins and avoid the presence of free metal ions in the cell, preventing oxidative damaging. Among metal ions, in eukaryotic organisms copper and iron are required by proteins involved in absolutely essential functions, such as respiration, oxidative stress protection, catalysis, gene expression regulation. Copper and iron binding proteins are localized in essentially all cellular compartments. Copper is physiologically present mainly as individual metal ion. Iron can be present both as individual metal ion or as part of cofactors, such as hemes and iron-sulfur (Fe-S) clusters. Both metal ions are characterized by the ability to cycle between different oxidation states, which enable them to catalyze redox reactions and to participate in electron transfer processes. Here we describe in detail the main processes responsible for the trafficking of copper and iron sulfur clusters, with particular interest for the structural aspects of the maturation of copper and iron-sulfur-binding proteins.
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Functions of the C2H2 Transcription Factor Gene thmea1 in Trichoderma harzianum under Copper Stress Based on Transcriptome Analysis. BIOMED RESEARCH INTERNATIONAL 2018; 2018:8149682. [PMID: 30105250 PMCID: PMC6076916 DOI: 10.1155/2018/8149682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 06/28/2018] [Indexed: 11/21/2022]
Abstract
Trichoderma spp. are important biocontrol filamentous fungi and have tremendous potential in soil bioremediation. In our previous studies, a C2H2 type transcription factor coding gene (thmea1) was cloned from a biocontrol agent T. harzianum Th-33; the encoded sequence of thmea1 contained 3 conserved C2H2 domains with Swi5 and Ace2 in Saccharomyces cerevisiae. The thmea1 knockout mutant Δthmea1 showed 12.9% higher copper tolerance than the wild-type Th33. To elucidate the function of thmea1 and its relationship with copper stress response, we conducted transcriptome sequencing and analysis of wild-type Th33 and Δthmea1 under 0.8 mM copper stress. A total of 1061 differentially expressed genes (DEGs) were identified between the two strains, all DEGs were assigned to KEGG pathway database, 383 DEGs were annotated in 191 individual pathways, and the categories of ribosomal protein synthesis and amino acid metabolism were the most highly enriched ones. Analysis of related DEGs showed that the expression levels of intracellular glutathione detoxification enzyme, heat shock proteins, and ribosomal proteins in Δthmea1 were higher than that of the wild-type Th33, and the expression of metallothionein (MT) gene did not change. In addition, the expression levels of genes coding for proteins associated with the Ccc2p-mediated copper chaperone Atx1p transport of copper ions into the Golgi secretory pathway increased, as well as the copper amine oxidase (CuAO). These findings suggest that Thmea1 is a negative regulated factor of copper tolerance ability in T. harzianum. It does not show metallothionein expression activator activities as that of Ace2 in S. cerevisiae. We hypothesize that after T. harzianum has lost its thmea1 gene, the ability of cells to scavenge reactive oxygen species, mainly through the glutathione antioxidant system, is enhanced, whereas protein synthesis and repair and copper secretion increase under copper stress, which increases the ability of the mutant strain to tolerate copper stress.
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Lanza V, Bellia F, Rizzarelli E. An inorganic overview of natural Aβ fragments: Copper(II) and zinc(II)-mediated pathways. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Tian X, Tan Z, Zhang Z, Zhan T, Liu X. An Electrochemical Sensor Based on an Ionic Liquid Covalently Functionalized Graphene Oxide for Simultaneous Determination of Copper (II) and Antimony (III). ChemistrySelect 2018. [DOI: 10.1002/slct.201801386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xia Tian
- Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education); College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Zhenzhou Road No. 53, Qingdao, PR China
| | - Zhengwei Tan
- Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education); College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Zhenzhou Road No. 53, Qingdao, PR China
| | - Zaizhen Zhang
- Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education); College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Zhenzhou Road No. 53, Qingdao, PR China
- Institute of Applied Chemistry and Biological Engineering; Institution Weifang Engineering Vocational College; Yunmenshan Road No. 8979 Qingzhou, PR China
| | - Tianrong Zhan
- Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education); College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Zhenzhou Road No. 53, Qingdao, PR China
| | - Xien Liu
- Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education); College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Zhenzhou Road No. 53, Qingdao, PR China
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12
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Kusuya Y, Hagiwara D, Sakai K, Yaguchi T, Gonoi T, Takahashi H. Transcription factor Afmac1 controls copper import machinery in Aspergillus fumigatus. Curr Genet 2017; 63:777-789. [PMID: 28215034 DOI: 10.1007/s00294-017-0681-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/30/2017] [Accepted: 01/30/2017] [Indexed: 12/11/2022]
Abstract
Copper (Cu) is an essential metal for all living organisms, although it is toxic in excess. Filamentous fungus must acquire copper from its environment for growth. Despite its essentiality for growth, the mechanisms that maintain copper homeostasis are not fully understood in filamentous fungus. To gain insights into copper homeostasis, we investigated the roles of a copper transcription factor Afmac1 in the life-threatening fungus Aspergillus fumigatus, a homolog of the yeast MAC1. We observed that the Afmac1 deletion mutant exhibited not only significantly slower growth, but also incomplete conidiation including a short chain of conidia and defective melanin. Moreover, the expressions of the copper transporters, ctrA1, ctrA2, and ctrC, and metalloreductases, Afu8g01310 and fre7, were repressed in ∆Afmac1 cells, while those expressions were induced under copper depletion conditions in wild-type. The expressions of pksP and wetA, which are, respectively, involved in biosynthesis of conidia-specific melanin and the late stage of conidiogenesis, were decreased in the ∆Afmac1 strain under minimal media condition. Taken together, these results indicate that copper acquisition through AfMac1 functions in growth as well as conidiation.
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Affiliation(s)
- Yoko Kusuya
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Daisuke Hagiwara
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Kanae Sakai
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Takashi Yaguchi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Tohru Gonoi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan
| | - Hiroki Takahashi
- Medical Mycology Research Center, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8673, Chiba, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Chiba, Japan.
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13
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The neglected role of copper ions in wound healing. J Inorg Biochem 2016; 161:1-8. [DOI: 10.1016/j.jinorgbio.2016.02.012] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 01/19/2016] [Accepted: 02/10/2016] [Indexed: 12/30/2022]
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14
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Zhou XY, Zhang T, Ren L, Wu JJ, Wang W, Liu JX. Copper elevated embryonic hemoglobin through reactive oxygen species during zebrafish erythrogenesis. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 175:1-11. [PMID: 26991749 DOI: 10.1016/j.aquatox.2016.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/07/2016] [Accepted: 03/07/2016] [Indexed: 06/05/2023]
Abstract
Copper, as an essential trace mineral, can cause diseases such as childhood leukemia at excess levels, but has been applied in anemia therapy for a long time. However, few reports have studied its role during hematopoiesis at the molecular level in an animal model. In this study, by microarray, qRT-PCR, whole-mount in situ hybridization and O-dianisidine staining detections, we revealed the increased expression of hemoglobin in copper-exposed embryos. Secondly, we found that copper-exposed embryos exhibited high levels of reactive oxygen species (ROS), and genes in oxygen binding and oxygen transporting were up-regulated in the embryos. Finally, we found that ROS scavengers NAC, GSH, and DMTU not only inhibited in vivo ROS levels induced by copper, but also significantly decreased high expression of hemoglobin back to almost normal levels in copper exposed embryos, and also helped with copper elimination from the embryos. Our data first demonstrated that ROS mediated copper induced hemoglobin expression in vertebrates, partly revealing the underlying molecular mechanism of copper therapy for anemia. Moreover, we revealed that copper homeostasis was broken by its induced ROS and ROS helped with copper overloading in the body, which could be applied as a novel therapy target for copper-caused diseases.
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Affiliation(s)
- Xin-Ying Zhou
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Ting Zhang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Long Ren
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jun-Jie Wu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Weimin Wang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jing-Xia Liu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China; Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan, Changde 415000, China.
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15
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Langwińska-Wośko E, Litwin T, Szulborski K, Członkowska A. Optical coherence tomography and electrophysiology of retinal and visual pathways in Wilson's disease. Metab Brain Dis 2016; 31:405-15. [PMID: 26686677 PMCID: PMC4791478 DOI: 10.1007/s11011-015-9776-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 12/07/2015] [Indexed: 11/17/2022]
Abstract
We evaluated correlations between positive findings of changes on brain magnetic resonance imaging (MRI) and selected morphological and electrophysiological parameters of the retinal and visual systems in Wilson's disease. Fifty-eight Wilson's disease symptomatic patients were divided according to whether they displayed brain changes on MRI (positive, n = 39; negative, n = 19). All participants and healthy control group (n = 30), underwent retinal optical coherence tomography to assess the thickness of macula and the total retinal nerve fiber layer. Visual evoked potentials were measured and electroretinography was performed. Macular and retinal nerve fibers were thinner in participants with changes on MRI than in participants without changes. Electrophysiological parameters were markedly different in the MRI positive group compared with the negative group and 30 healthy controls; however, some abnormalities were evident in cases without visible brain pathology. Morphological and electrophysiological changes of retinal and visual pathways are associated with MRI visualized brain injury in Wilson's disease and may be useful for detecting the degree of neurodegeneration.
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Affiliation(s)
| | - Tomasz Litwin
- 2nd Department of Neurology, Institute of Psychiatry and Neurology, Sobieskiego 9, 02-957, Warsaw, Poland
| | - Kamil Szulborski
- SPKSO Ophthalmic University Hospital, Medical University of Warsaw, Warsaw, Poland
| | - Anna Członkowska
- 2nd Department of Neurology, Institute of Psychiatry and Neurology, Sobieskiego 9, 02-957, Warsaw, Poland.
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Warsaw, Poland.
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16
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Hennig J, Andrésen C, Museth AK, Lundström P, Tibell LAE, Jonsson BH. Local Destabilization of the Metal-Binding Region in Human Copper–Zinc Superoxide Dismutase by Remote Mutations Is a Possible Determinant for Progression of ALS. Biochemistry 2015; 54:323-33. [DOI: 10.1021/bi500606j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Janosch Hennig
- Division
of Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83, Linköping, Sweden
- Institute
of Structural Biology, Helmholtz Zentrum München GmbH, DE-85764 Neuherberg, Germany
- Chair
of Biomolecular NMR Spectroscopy, Department of Chemistry, Technische Universität München, DE-85748 Garching, Germany
| | - Cecilia Andrésen
- Division
of Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83, Linköping, Sweden
| | - A. Katrine Museth
- Division
of Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83, Linköping, Sweden
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Patrik Lundström
- Division
of Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83, Linköping, Sweden
| | - Lena A. E. Tibell
- Department
of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Bengt-Harald Jonsson
- Division
of Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83, Linköping, Sweden
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17
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Hong-Hermesdorf A, Miethke M, Gallaher SD, Kropat J, Dodani SC, Chan J, Barupala D, Domaille DW, Shirasaki DI, Loo JA, Weber PK, Pett-Ridge J, Stemmler TL, Chang CJ, Merchant SS. Subcellular metal imaging identifies dynamic sites of Cu accumulation in Chlamydomonas. Nat Chem Biol 2014; 10:1034-42. [PMID: 25344811 PMCID: PMC4232477 DOI: 10.1038/nchembio.1662] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 09/05/2014] [Indexed: 12/03/2022]
Abstract
We identified a Cu accumulating structure with a dynamic role in intracellular Cu homeostasis. During Zn limitation, Chlamydomonas reinhardtii hyperaccumulated Cu, dependent on the nutritional Cu sensor CRR1, but was functionally Cu-deficient. Visualization of intracellular Cu revealed major Cu accumulation sites coincident with electron-dense structures that stained positive for low pH and polyphosphate, suggesting that they are lysosome-related organelles. NanoSIMS showed colocalization of Ca and Cu, and X-ray absorption spectroscopy (XAS) was consistent with Cu+ accumulation in an ordered structure. Zn resupply restored Cu homeostasis concomitant with reduced abundance of these structures. Cu isotope labeling demonstrated that sequestered Cu+ became bio-available for the synthesis of plastocyanin, and transcriptome profiling indicated that mobilized Cu became visible to CRR1. Cu trafficking to intracellular accumulation sites may be a strategy for preventing protein mis-metallation during Zn deficiency and enabling efficient cuproprotein (re)-metallation upon Zn resupply.
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Affiliation(s)
- Anne Hong-Hermesdorf
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California, USA
| | - Marcus Miethke
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California, USA
| | - Sean D Gallaher
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California, USA
| | - Janette Kropat
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California, USA
| | - Sheel C Dodani
- 1] Department of Chemistry, University of California-Berkeley, Berkeley, California, USA. [2] Howard Hughes Medical Institute, University of California-Berkeley, Berkeley, California, USA
| | - Jefferson Chan
- 1] Department of Chemistry, University of California-Berkeley, Berkeley, California, USA. [2] Howard Hughes Medical Institute, University of California-Berkeley, Berkeley, California, USA
| | - Dulmini Barupala
- Department of Pharmaceutical Sciences, Wayne State University, Detroit, Michigan, USA
| | - Dylan W Domaille
- 1] Department of Chemistry, University of California-Berkeley, Berkeley, California, USA. [2] Howard Hughes Medical Institute, University of California-Berkeley, Berkeley, California, USA
| | - Dyna I Shirasaki
- Department of Biological Chemistry, University of California-Los Angeles, Los Angeles, California, USA
| | - Joseph A Loo
- 1] Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California, USA. [2] Department of Biological Chemistry, University of California-Los Angeles, Los Angeles, California, USA. [3] Institute for Genomics and Proteomics, University of California-Los Angeles, Los Angeles, USA
| | - Peter K Weber
- Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, USA
| | - Jennifer Pett-Ridge
- Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, USA
| | - Timothy L Stemmler
- Department of Pharmaceutical Sciences, Wayne State University, Detroit, Michigan, USA
| | - Christopher J Chang
- 1] Department of Chemistry, University of California-Berkeley, Berkeley, California, USA. [2] Howard Hughes Medical Institute, University of California-Berkeley, Berkeley, California, USA
| | - Sabeeha S Merchant
- 1] Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California, USA. [2] Institute for Genomics and Proteomics, University of California-Los Angeles, Los Angeles, USA
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18
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Sun XH, Yu G, Li JT, Jia P, Zhang JC, Jia CG, Zhang YH, Pan HY. A heavy metal-associated protein (AcHMA1) from the halophyte, Atriplex canescens (Pursh) Nutt., confers tolerance to iron and other abiotic stresses when expressed in Saccharomyces cerevisiae. Int J Mol Sci 2014; 15:14891-906. [PMID: 25153638 PMCID: PMC4159888 DOI: 10.3390/ijms150814891] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/15/2014] [Accepted: 08/18/2014] [Indexed: 11/16/2022] Open
Abstract
Many heavy metals are essential for metabolic processes, but are toxic at elevated levels. Metal tolerance proteins provide resistance to this toxicity. In this study, we identified and characterized a heavy metal-associated protein, AcHMA1, from the halophyte, Atriplex canescens. Sequence analysis has revealed that AcHMA1 contains two heavy metal binding domains. Treatments with metals (Fe, Cu, Ni, Cd or Pb), PEG6000 and NaHCO3 highly induced AcHMA1 expression in A. canescens, whereas NaCl and low temperature decreased its expression. The role of AcHMA1 in metal stress tolerance was examined using a yeast expression system. Expression of the AcHMA1 gene significantly increased the ability of yeast cells to adapt to and recover from exposure to excess iron. AcHMA1 expression also provided salt, alkaline, osmotic and oxidant stress tolerance in yeast cells. Finally, subcellular localization of an AcHMA1/GFP fusion protein expressed in tobacco cells showed that AcHMA1 was localized in the plasma membrane. Thus, our results suggest that AcHMA1 encodes a membrane-localized metal tolerance protein that mediates the detoxification of iron in eukaryotes. Furthermore, AcHMA1 also participates in the response to abiotic stress.
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Affiliation(s)
- Xin-Hua Sun
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Gang Yu
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Jing-Tao Li
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Pan Jia
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Ji-Chao Zhang
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Cheng-Guo Jia
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Yan-Hua Zhang
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
| | - Hong-Yu Pan
- College of Plant Science, Jilin University, Changchun130062, Jilin, China.
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19
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20
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Trocello JM, Broussolle E, Girardot-Tinant N, Pelosse M, Lachaux A, Lloyd C, Woimant F. Wilson's disease, 100 years later…. Rev Neurol (Paris) 2013; 169:936-43. [DOI: 10.1016/j.neurol.2013.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 04/30/2013] [Accepted: 05/14/2013] [Indexed: 10/26/2022]
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21
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Sea KW, Sheng Y, Lelie HL, Kane Barnese L, Durazo A, Valentine JS, Gralla EB. Yeast copper-zinc superoxide dismutase can be activated in the absence of its copper chaperone. J Biol Inorg Chem 2013; 18:985-92. [PMID: 24061560 DOI: 10.1007/s00775-013-1047-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 09/04/2013] [Indexed: 01/29/2023]
Abstract
Copper-zinc superoxide dismutase (Sod1) is an abundant intracellular enzyme that catalyzes the disproportionation of superoxide to give hydrogen peroxide and dioxygen. In most organisms, Sod1 acquires copper by a combination of two pathways, one dependent on the copper chaperone for Sod1 (CCS), and the other independent of CCS. Examples have been reported of two exceptions: Saccharomyces cerevisiae, in which Sod1 appeared to be fully dependent on CCS, and Caenorhabditis elegans, in which Sod1 was completely independent of CCS. Here, however, using overexpressed Sod1, we show there is also a significant amount of CCS-independent activation of S. cerevisiae Sod1, even in low-copper medium. In addition, we show CCS-independent oxidation of the disulfide bond in S. cerevisiae Sod1. There appears to be a continuum between CCS-dependent and CCS-independent activation of Sod1, with yeast falling near but not at the CCS-dependent end.
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Affiliation(s)
- Kevin W Sea
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095-1569, USA,
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22
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Dong QY, Wu ZY. Advance in the pathogenesis and treatment of Wilson disease. Transl Neurodegener 2012; 1:23. [PMID: 23210912 PMCID: PMC3526418 DOI: 10.1186/2047-9158-1-23] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 11/21/2012] [Indexed: 02/06/2023] Open
Abstract
Wilson disease is an autosomal recessive disorder of copper metabolism. Diagnosis depends primarily on clinical features, biochemical parameters and the presence of the Kayser-Fleischer ring. Genetic analysis for mutations within ATP7B is a convincing diagnostic tool. The traditional treatment for WD includes chelation of excessive copper accumulation and reduction of copper intake. Medical therapy is effective but WD is not yet curable. Liver transplantation is especially helpful for patients who fail to respond to medical therapy or present with fulminant liver failure, although evaluation of its long-term effect are still in need.
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Affiliation(s)
- Qin-Yun Dong
- Department of Neurology and Institute of Neurology, Huashan Hospital, Institutes of Brain Science and State Key Laboratory of Medical Neurobiology, Shanghai Medical College, Fudan University, 12 Wulumuqi Zhong Road, Shanghai, 200040, China
| | - Zhi-Ying Wu
- Department of Neurology and Institute of Neurology, Huashan Hospital, Institutes of Brain Science and State Key Laboratory of Medical Neurobiology, Shanghai Medical College, Fudan University, 12 Wulumuqi Zhong Road, Shanghai, 200040, China
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23
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Matias AC, Villa dos Santos N, Chelegão R, Nomura CS, Fiorito PA, Cerchiaro G. Cu(GlyGlyHis) effects on MCF7 cells: Copper uptake, reactive oxygen species generation and membrane topography changes. J Inorg Biochem 2012; 116:172-9. [DOI: 10.1016/j.jinorgbio.2012.07.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 07/08/2012] [Accepted: 07/09/2012] [Indexed: 12/18/2022]
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24
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Travaglia A, Pietropaolo A, La Mendola D, Nicoletti VG, Rizzarelli E. The inorganic perspectives of neurotrophins and Alzheimer's disease. J Inorg Biochem 2012; 111:130-7. [DOI: 10.1016/j.jinorgbio.2011.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 08/30/2011] [Accepted: 10/03/2011] [Indexed: 01/19/2023]
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25
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Urso E, Manno D, Serra A, Buccolieri A, Rizzello A, Danieli A, Acierno R, Salvato B, Maffia M. Role of the Cellular Prion Protein in the Neuron Adaptation Strategy to Copper Deficiency. Cell Mol Neurobiol 2012; 32:989-1001. [DOI: 10.1007/s10571-012-9815-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 02/07/2012] [Indexed: 01/15/2023]
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26
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Cyanobacterial metallochaperone inhibits deleterious side reactions of copper. Proc Natl Acad Sci U S A 2011; 109:95-100. [PMID: 22198771 DOI: 10.1073/pnas.1117515109] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Copper metallochaperones supply copper to cupro-proteins through copper-mediated protein-protein-interactions and it has been hypothesized that metallochaperones thereby inhibit copper from causing damage en route. Evidence is presented in support of this latter role for cyanobacterial metallochaperone, Atx1. In cyanobacteria Atx1 contributes towards the supply of copper to plastocyanin inside thylakoids but it is shown here that in copper-replete medium, copper can reach plastocyanin without Atx1. Unlike metallochaperone-independent copper-supply to superoxide dismutase in eukaryotes, glutathione is not essential for Atx1-independent supply to plastocyanin: Double mutants missing atx1 and gshB (encoding glutathione synthetase) accumulate the same number of atoms of copper per cell in the plastocyanin pool as wild type. Critically, Δatx1ΔgshB are hypersensitive to elevated copper relative to wild type cells and also relative to ΔgshB single mutants with evidence that hypersensitivity arises due to the mislocation of copper to sites for other metals including iron and zinc. The zinc site on the amino-terminal domain (ZiaA(N)) of the P(1)-type zinc-transporting ATPase is especially similar to the copper site of the Atx1 target PacS(N), and ZiaA(N) will bind Cu(I) more tightly than zinc. An NMR model of a substituted-ZiaA(N)-Cu(I)-Atx1 heterodimer has been generated making it possible to visualize a juxtaposition of residues surrounding the ZiaA(N) zinc site, including Asp(18), which normally repulse Atx1. Equivalent repulsion between bacterial copper metallochaperones and the amino-terminal regions of P(1)-type ATPases for metals other than Cu(I) is conserved, again consistent with a role for copper metallochaperones to withhold copper from binding sites for other metals.
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27
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Banci L, Bertini I, Ciofi-Baffoni S, D'Alessandro A, Jaiswal D, Marzano V, Neri S, Ronci M, Urbani A. Copper exposure effects on yeast mitochondrial proteome. J Proteomics 2011; 74:2522-35. [DOI: 10.1016/j.jprot.2011.04.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Revised: 03/27/2011] [Accepted: 04/13/2011] [Indexed: 11/28/2022]
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28
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Badarau A, Dennison C. Thermodynamics of copper and zinc distribution in the cyanobacterium Synechocystis PCC 6803. Proc Natl Acad Sci U S A 2011; 108:13007-12. [PMID: 21778408 PMCID: PMC3156197 DOI: 10.1073/pnas.1101448108] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Copper is supplied to plastocyanin for photosynthesis and cytochrome c oxidase for respiration in the thylakoids of Synechocystis PCC 6803 by the membrane-bound P-type ATPases CtaA and PacS, and the metallochaperone Atx1. We have determined the Cu(I) affinities of all of the soluble proteins and domains in this pathway. The Cu(I) affinities of the trafficking proteins range from 5 × 10(16) to 5 × 10(17) M(-1) at pH 7.0, consistent with values for homologues. Unusually, Atx1 binds Cu(I) significantly tighter than the metal-binding domains (MBDs) of CtaA and PacS (CtaA(N) and PacS(N)), and equilibrium copper exchange constants of approximately 0.2 are obtained for transfer to the MBDs. Dimerization of Atx1 increases the affinity for Cu(I), but the loop 5 His61 residue has little influence. The MBD of the zinc exporter ZiaA (ZiaA(N)) exhibits an almost identical Cu(I) affinity, and Cu(I) exchange with Atx1, as CtaA(N) and PacS(N), and the relative stabilities of the complexes must enable the metallochaperone to distinguish between the MBDs. The binding of potentially competing zinc to the trafficking proteins has been studied. ZiaA(N) has the highest Zn(II) affinity and thermodynamics could be important for zinc removal from the cell. Plastocyanin has a Cu(I) affinity of 2.6 × 10(17) M(-1), 15-fold tighter than that of the Cu(A) site of cytochrome c oxidase, highlighting the need for specific mechanisms to ensure copper delivery to both of these targets. The narrow range of Cu(I) affinities for the cytoplasmic copper proteins in Synechocystis will facilitate relocation when copper is limiting.
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Affiliation(s)
- Adriana Badarau
- Institute for Cell and Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, United Kingdom
| | - Christopher Dennison
- Institute for Cell and Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, United Kingdom
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29
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Badarau A, Dennison C. Copper Trafficking Mechanism of CXXC-Containing Domains: Insight from the pH-Dependence of Their Cu(I) Affinities. J Am Chem Soc 2011; 133:2983-8. [DOI: 10.1021/ja1091547] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adriana Badarau
- Institute for Cell and Molecular Biosciences, Medical
School, Newcastle University, Newcastle
upon Tyne, NE2 4HH, U.K
| | - Christopher Dennison
- Institute for Cell and Molecular Biosciences, Medical
School, Newcastle University, Newcastle
upon Tyne, NE2 4HH, U.K
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30
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Badarau A, Firbank SJ, McCarthy AA, Banfield MJ, Dennison C. Visualizing the metal-binding versatility of copper trafficking sites . Biochemistry 2010; 49:7798-810. [PMID: 20726513 DOI: 10.1021/bi101064w] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular systems have evolved to permit the safe delivery of copper. Despite extensive studies, many copper site structures involved in copper homeostasis, even for the well-studied metallochaperone Atx1, remain unresolved. Cyanobacteria import copper to their thylakoid compartments for use in photosynthesis and respiration and possess an Atx1 that we show can adopt multiple oligomeric states when metalated, capable of binding up to four copper ions. Two-copper- and four-copper-loaded dimers exist in solution at low micromolar concentrations, and head-to-head and side-to-side arrangements, respectively, can be crystallized, with the latter binding a [Cu(4){mu(2)-S(gamma)(Cys)}(4)Cl(2)](2-) cluster. The His61Tyr mutation on loop 5 weakens head-to-head dimerization, yet a side-to-side dimer binding a similar cluster as in the wild-type protein, but with phenolate coordination, is present. The cognate metal-binding domains (MBDs) of the P-type ATPases CtaA and PacS, which are proposed to donate copper to and accept copper from Atx1, respectively, are monomeric in the presence of copper. The structure of the MBD of Cu(I)-PacS shows a crystallographic trimer arrangement around a [Cu(3){mu(2)-S(gamma)(Cys)}(3){S(gamma)(Cys)}(3)](2-) cluster that is very similar to that found for an alternate form of the His61Tyr Atx1 mutant. Copper transfer from the MBD of CtaA to Atx1 is favorable, but delivery from Atx1 to the MBD of PacS is strongly dependent upon the dimeric form of Atx1. A copper-induced switch in Atx1 dimer structure may have a regulatory role with cluster formation helping to buffer copper.
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Affiliation(s)
- Adriana Badarau
- Institute for Cell and Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
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31
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32
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Functional characterization of the copper-transporting P-type ATPase gene of Penicillium janthinellum strain GXCR. J Microbiol 2010; 47:736-45. [DOI: 10.1007/s12275-009-0074-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2009] [Accepted: 07/14/2009] [Indexed: 01/09/2023]
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33
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Abstract
Optimal functioning of the central and peripheral nervous system is dependent on a constant supply of appropriate nutrients. The first section of this review discusses neurologic manifestations related to deficiency of key nutrients such as vitamin B(12), folate, copper, vitamin E, thiamine, and others. The second section addresses neurologic complications related to bariatric surgery. The third sections includes neurologic presentations caused by nutrient deficiencies in the setting of alcoholism. The concluding section addresses neurologic deficiency diseases that have a geographic predilection.
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Affiliation(s)
- Neeraj Kumar
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, 200 First Street, SW, Rochester, MN 55905, USA.
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34
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Museth AK, Brorsson AC, Lundqvist M, Tibell LAE, Jonsson BH. The ALS-associated mutation G93A in human copper-zinc superoxide dismutase selectively destabilizes the remote metal binding region. Biochemistry 2009; 48:8817-29. [PMID: 19655787 DOI: 10.1021/bi900703v] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
More than 100 distinct mutations in the gene (SOD1) for human copper-zinc superoxide dismutase (CuZnSOD) have been associated with familial amyotrophic lateral sclerosis (fALS). Studies of these mutant proteins, which often have been performed under far from physiological conditions, have indicated effects on protein stabilities, catalytic activity, and metal binding affinities but with no common pattern. Also, with the knowledge that ALS is a late onset disease it is apparent that protein interactions which contribute to the disorder might, in the natural cellular milieu, depend on a delicate balance between intrinsic protein properties. In this study, we have used experimental conditions as near as possible to the in vivo conditions to reduce artifacts emanating from the experimental setup. Using 1H-15N HSQC NMR spectroscopy, we have analyzed hydrogen exchange at the amide groups of wild-type (wt) CuZnSOD and the fALS-associated G93A SOD variant in their fully metalated states. From analyses of the exchange pattern, we have characterized the local dynamics at 64% of all positions in detail in both the wt and G93A protein. The results show that the G93A mutation had no effect on the dynamics at a majority of the investigated positions. However, the mutation results in local destabilization at the site of the mutation and also in stabilization at a few positions that were apparently scattered over the entire protein surface. Most remarkably, the mutation selectively destabilized the remote metal binding region. The results indicate that the metal binding region may affect the intermolecular protein-protein interactions which cause formation of protein aggregates.
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Affiliation(s)
- Anna Katrine Museth
- Division of Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
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Leitch JM, Yick PJ, Culotta VC. The right to choose: multiple pathways for activating copper,zinc superoxide dismutase. J Biol Chem 2009; 284:24679-83. [PMID: 19586921 PMCID: PMC2757171 DOI: 10.1074/jbc.r109.040410] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Since the discovery of SOD1 in 1969, there have been numerous achievements made in our understanding of the enzyme's biochemical reactivity and its role in oxidative stress protection and as a genetic determinant in amyotrophic lateral sclerosis. Many recent advances have also been made in understanding the "activation" of SOD1, i.e. the process by which an inert polypeptide is converted to a mature active enzyme through post-translational modifications. To date, two such activation pathways have been identified: one requiring the CCS copper chaperone and one that works independently of CCS to insert copper and activate SOD1 through oxidation of an intramolecular disulfide. Depending on an organism's lifestyle and complexity, different eukaryotes have evolved to favor one pathway over the other. Some organisms rely solely on CCS for activating SOD1, and others can only activate SOD1 independently of CCS, whereas the majority of eukaryotes appear to have evolved to use both pathways. In this minireview, we shall highlight recent advances made in understanding the mechanisms by which the CCS-dependent and CCS-independent pathways control the activity, structure, and intracellular localization of copper,zinc superoxide dismutase, with relevance to amyotrophic lateral sclerosis and an emphasis on evolutionary biology.
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Affiliation(s)
- Jeffry M. Leitch
- From the Department of Environmental Health Sciences, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland 21205
| | - Priscilla J. Yick
- From the Department of Environmental Health Sciences, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland 21205
| | - Valeria C. Culotta
- From the Department of Environmental Health Sciences, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland 21205
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36
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Banci L, Bertini I, Ciofi-Baffoni S, Poggi L, Vanarotti M, Tottey S, Waldron KJ, Robinson NJ. NMR structural analysis of the soluble domain of ZiaA-ATPase and the basis of selective interactions with copper metallochaperone Atx1. J Biol Inorg Chem 2009; 15:87-98. [DOI: 10.1007/s00775-009-0568-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Accepted: 06/29/2009] [Indexed: 10/20/2022]
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37
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Zhang Y, Gladyshev VN. Comparative Genomics of Trace Elements: Emerging Dynamic View of Trace Element Utilization and Function. Chem Rev 2009; 109:4828-61. [DOI: 10.1021/cr800557s] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yan Zhang
- Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588-0664
| | - Vadim N. Gladyshev
- Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588-0664
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Banci L, Bertini I, Ciofi-Baffoni S. Copper trafficking in biology: an NMR approach. HFSP JOURNAL 2009; 3:165-75. [PMID: 19949444 DOI: 10.2976/1.3078306] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Accepted: 01/15/2009] [Indexed: 11/19/2022]
Abstract
Copper ions are essential for living organisms because they are involved in several fundamental biological processes. Biomolecules interacting with copper ions have to be characterized as such, when bound to the metal ion, and when they interact with other biomolecules or substrates. The characterization is both structural and dynamic. In this context, NMR is a preferred tool of investigation because it allows shedding light on what happens in solution. Here, the NMR contribution to the copper trafficking is described, providing precious information on biochemical pathways, which are essential to understand the mechanisms of life at the molecular level.
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Affiliation(s)
- Lucia Banci
- Department of Chemistry, and Magnetic Resonance Center CERM, University of Florence, Scientific Campus, 50019, Sesto Fiorentino, Florence, Italy
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39
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Tottey S, Waldron KJ, Firbank SJ, Reale B, Bessant C, Sato K, Cheek TR, Gray J, Banfield MJ, Dennison C, Robinson NJ. Protein-folding location can regulate manganese-binding versus copper- or zinc-binding. Nature 2008; 455:1138-42. [DOI: 10.1038/nature07340] [Citation(s) in RCA: 253] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Accepted: 08/13/2008] [Indexed: 01/22/2023]
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40
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Simon I, Schaefer M, Reichert J, Stremmel W. Analysis of the human Atox 1 homologue in Wilson patients. World J Gastroenterol 2008; 14:2383-7. [PMID: 18416466 PMCID: PMC2705094 DOI: 10.3748/wjg.14.2383] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To analyze the metallochaperone antioxidant-1 (Atox1) gene sequence in Wilson disease patients.
METHODS: Mutation analysis of the four exons of the Atox1 gene including the intron- exon boundaries was performed in 63 Wilson disease patients by direct sequencing.
RESULTS: From 63 selected patients no mutations were identified after the entire coding region including the intron- exon boundaries of Atox1 were sequenced. One known polymorphism within the Atox1 gene (5’UTR -99 T>C) in 31 (49%) of the Wilson patients as well as one previously undescribed variation (5’UTR -68 C>T) in 2 of the Wilson patients could be detected. Statistical analyses revealed that the existence of a variation within the Atox1- gene showed a tendency towards an earlier onset of the disease.
CONCLUSION: Based on the data of this study, no major role can be attributed to Atox1 in the pathophysiology or clinical variation of Wilson disease.
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Op’t Holt BT, Merz KM. Insights into Cu(I) exchange in HAH1 using quantum mechanical and molecular simulations. Biochemistry 2007; 46:8816-26. [PMID: 17616150 PMCID: PMC2527583 DOI: 10.1021/bi7007195] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The human antioxidant protein, HAH1, is an important participant in a Cu(I) transport chain, delivering one Cu(I) ion to the Wilson's (WND) or Menkes disease protein (MNK). Full geometry optimizations and second-derivative calculations were performed on several binding site models using the B3LYP functional to derive parameters for the construction of a novel molecular mechanical (MM) force field for Cu(I) and its ligating residues in HAH1. MM minimization and molecular dynamics (MD) calculations were then performed using the AMBER suite to validate the newly generated force field. The X-ray crystal structure of the protein and the geometry of the Cu(I) binding site within the protein were reproduced by the MD simulations on the protein based on rmsd and visual inspection, validating the new force field parameters. The results from the quantum mechanical (QM) and MD simulations suggest that either a two- or three-coordinate exchange reaction is preferred and that it is unlikely that a four-coordinate Cu(I) species plays a role in copper exchange.
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Affiliation(s)
| | - Kenneth M. Merz
- To whom correspondence should be addressed: Department of Chemistry and the Quantum Theory Project, 2328 New Physics Building, PO Box 118435, University of Florida, Gainesville, FL 32611-8435. Tel: (352) 392-6973. Fax: (352) 392-8722.
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42
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Giuffrida ML, Grasso G, Ruvo M, Pedone C, Saporito A, Marasco D, Pignataro B, Cascio C, Copani A, Rizzarelli E. Abeta(25-35) and its C- and/or N-blocked derivatives: copper driven structural features and neurotoxicity. J Neurosci Res 2007; 85:623-33. [PMID: 17131391 DOI: 10.1002/jnr.21135] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The toxic properties of beta-amyloid protein, Abeta(1-42), the major component of senile plaques in Alzheimer's disease, depend on nucleation-dependent oligomerization and aggregation. In addition, Abeta(1-42) toxicity is favored by the presence of trace metals, which affect the secondary structure of the peptide. A peptide comprising 11 residues within Abeta(1-42) [Abeta(25-35)] aggregates and retains the neurotoxic activity of Abeta(1-42). We have used both Abeta(25-35) and its C-amidated or N-acetylated/C-amidated derivatives to investigate the role of copper(II) in modulating the conformation and aggregation state as well as the neurotoxic properties of amyloid peptides. Electrospray ionization mass spectrometry (ESI-MS) and electron paramagnetic resonance (EPR) measurements were performed to verify the formation of copper(II)/Abeta(25-35) complexes and to determine the coordination mode, respectively. Abeta(25-35) and its derivatives were analyzed by circular dichroism spectroscopy to assess their secondary structure, subjected to thioflavine-T (Th-T) binding assay to reveal beta-sheet structured aggregates formation, and imaged by scanning force microscopy. Toxicity was assessed on mature cultures of rat cortical neurons. We found that beta-sheet-structured species of Abeta(25-35) were neurotoxic, whereas the random-coil-structured derivatives were devoid of effect. Interestingly, copper promoted the random-coil/beta-sheet transition of Abeta(25-35), with ensuing peptide toxicity, but it induced the toxicity of the N-acetylated/C-amidated derivative without affecting peptide folding. Moreover, copper did not influence either the folding or the activity of the C-amidated Abeta(25-35), suggesting that blockade of the C-terminus of Abeta peptides might be sufficient to prevent Abeta toxicity.
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Affiliation(s)
- Maria Laura Giuffrida
- PhD Program in Neurobiology, Faculty of Medicine, University of Catania, Catania, Italy
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Abstract
Optimal functioning of the central and peripheral nervous system is dependent on appropriate nutrients. Neurologic consequences of nutritional deficiencies are not restricted to underdeveloped countries. Multiple nutritional deficiencies can coexist. Obesity is of particular concern in the developed world. The rising rate of bariatric surgery are accompanied by neurologic complications related to nutrient deficiencies. Prognosis depends on prompt recognition and institution of appropriate therapy. This review discusses peripheral nervous system manifestations related to the deficiency of key nutrients, neurologic complications associated with bariatric surgery, and conditions that have a geographic significance associated with bariatric surgery and certain conditions that have a geographic predilection.
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Affiliation(s)
- Neeraj Kumar
- Department of Neurology, Mayo Clinic, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
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44
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Abstract
Cisplatin, a platinum coordinated complex, is a widely used antineoplastic agent for the treatment of metastatic tumors of the testis, metastatic ovarian tumors, lung cancer, advanced bladder cancer and many other solid tumors. The cytotoxic action of the drug is often thought to be associated with its ability to bind DNA to form cisplatin-DNA adducts. The development of resistance to cisplatin during treatment is common and constitutes a major obstacle to the cure of sensitive tumors. Although to understand the clinically relevant mechanisms of resistance, many studies have been aimed at clarifying the biochemical/molecular alterations of cisplatin-resistance cells, these studies did not conclusively identify the basis of cellular resistance to cisplatin. In this review, cisplatin resistance was discussed in terms of the relevant transporters, such as copper transporters (CTRs), organic cation transporters (OCTs) and multi-drug resistance related transporters (MDRs). These transporters seem to be contributed to cisplatin resistance through the reduction of drug accumulation in the cell. Better understanding the mechanism of cisplatin resistance associated with transporters will provide the useful informations for overcoming the cisplatin resistance.
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Affiliation(s)
- Min-Koo Choi
- Department of Pharmaceutics, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
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45
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Das SK, Ray K. Wilson's disease: an update. ACTA ACUST UNITED AC 2006; 2:482-93. [PMID: 16932613 DOI: 10.1038/ncpneuro0291] [Citation(s) in RCA: 180] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2006] [Accepted: 07/07/2006] [Indexed: 02/06/2023]
Abstract
Wilson's disease (WD) is an inborn error of copper metabolism caused by a mutation to the copper-transporting gene ATP7B. The disease has an autosomal recessive mode of inheritance, and is characterized by excessive copper deposition, predominantly in the liver and brain. Diagnosis of the condition depends primarily on clinical features, biochemical parameters and the presence of the Kayser-Fleischer ring, and a new diagnostic scoring system has recently been proposed. Mutations in ATP7B can occur anywhere along the entire 21 exons, which makes the identification of gene defects particularly challenging. Identification of carriers and presymptomatic family members of affected individuals is achieved by polymerase-chain-reaction-based marker analysis. The traditional treatment for WD is based on copper chelation with agents such as D-penicillamine, but use of this drug has been questioned because of reported side effects. The use of agents such as trientine and ammonium tetrathiomolybdate has been advocated, although results of long-term trials are awaited. In selected cases, orthotropic hepatic transplantation can reverse the basic metabolic abnormality in WD and improve both hepatic and neurological symptoms. Studies of the underlying defects in ATP7B and its suspected modifiers ATOX1 and COMMD1 are expected to unravel the disease's genotype-phenotype correlation, and should lead to the design of improved drugs for ameliorating the suffering of patients.
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Affiliation(s)
- Shyamal K Das
- Movement Disorders Clinic, Bangur Institute of Neurology, Kolkata, India.
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46
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Abstract
The hematologic manifestations of copper deficiency are well known and include anemia and neutropenia. In the past few years, the neurological manifestations of acquired copper deficiency in humans has been recognized, the most common being a myelopathy presenting with a spastic gait and prominent sensory ataxia. The known causes of acquired copper deficiency include prior gastric surgery, excessive zinc ingestion, and malabsorption; however, often the cause is unclear. Hyperzincemia may be present even in the absence of exogenous zinc ingestion. The clinical features and neuroimaging findings are similar to the subacute combined degeneration seen in patients with vitamin B12 deficiency. Copper and vitamin B12 deficiency may coexist. The neurological syndrome may be present without the hematologic manifestations. Copper supplementation resolves the anemia and neutropenia promptly and completely and may prevent the neurological deterioration. Improvement, when it occurs, is often subjective and preferentially involves sensory symptoms. This article describes patients with copper deficiency myelopathy seen at the Mayo Clinic in Rochester, Minn, and reviews the literature on neurological manifestations of acquired copper deficiency in humans.
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Affiliation(s)
- Neeraj Kumar
- Department of Neurology, Mayo Clinic College of Medicine, 200 First St SW, Rochester, MN 55905, USA.
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47
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Balamurugan K, Schaffner W. Copper homeostasis in eukaryotes: Teetering on a tightrope. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2006; 1763:737-46. [PMID: 16784785 DOI: 10.1016/j.bbamcr.2006.05.001] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2006] [Revised: 04/28/2006] [Accepted: 05/05/2006] [Indexed: 01/05/2023]
Abstract
The transition metal copper is an essential trace element for both prokaryotes and eukaryotes. However, intracellular free copper has to be strictly limited due to its toxic side effects, not least the generation of reactive oxygen species (ROS) via redox cycling. Thus, all organisms have sophisticated copper homeostasis mechanisms that regulate uptake, distribution, sequestration and export of copper. From insects to mammals, metal-responsive transcription factor (MTF-1), a zinc finger transcription factor, controls expression of metallothioneins and other components involved in heavy metal homeostasis. In the fruit fly Drosophila, MTF-1 paradoxically acts as an activator under both high and low copper concentrations. Namely, under high copper conditions, MTF-1 activates metallothioneins in order to protect the cell, while under low copper conditions MTF-1 activates the copper importer Ctr1B in order to acquire scarce copper from the surroundings. This review highlights the current knowledge of copper homeostasis in eukaryotes with a focus on Drosophila and the role of MTF-1.
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Affiliation(s)
- Kuppusamy Balamurugan
- Institute of Molecular Biology, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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48
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Kim I, Lee KS, Hwang JS, Ahn MY, Yun EY, Li JH, Sohn HD, Jin BR. Molecular cloning and characterization of ATX1 cDNA from the mole cricket, Gryllotalpa orientalis. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2006; 61:231-8. [PMID: 16552768 DOI: 10.1002/arch.20114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
To search for an insect homologue of antioxidant protein 1 (ATX1), a mole cricket, Gryllotalpa orientalis, cDNA library was screened and a cDNA clone, which encodes a 73 amino acid polypeptide with a predicted molecular mass of 8.0 kDa and pI of 5.68, was isolated. The G. orientalis ATX1 (GoATX1) cDNA features both a MTCXXC copper-binding site in the N-terminus and a KTGK lysine-rich region in the C-terminus. The deduced amino acid sequence of the GoATX1 cDNA showed 63% identity to Drosophila melanogaster ATX1 and 55% to Ixodes pacificus ATX1. Northern blot analysis revealed the presence of GoATX1 transcripts in midgut, fat body, and epidermis. When H2O2 was injected into the body cavity of G. orientalis adult, GoATX1 mRNA expression was up-regulated in the fat body tissue. Fat body expression level of GoATX1 mRNA in the fat body was increased following exposure to low (4 degrees C) and high (37 degrees C) temperatures, suggesting that GoATX1 plays a protective role against oxidative stress caused by temperature shock. This is the first report about a functional role of insect ATX1 in antioxidant defense.
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Affiliation(s)
- Iksoo Kim
- Department of Agricultural Biology, National Institute of Agricultural Science and Technology, RDA, Suwon, Korea.
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49
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DeSilva TM, Veglia G, Opella SJ. Solution structures of the reduced and Cu(I) bound forms of the first metal binding sequence of ATP7A associated with Menkes disease. Proteins 2006; 61:1038-49. [PMID: 16211579 DOI: 10.1002/prot.20639] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The coding sequence for the first N-terminal copper binding motif of the human Menkes disease protein (MNK1; residues 2-79) was synthesized, cloned, and expressed in bacteria for biochemical and structural studies. MNK1 adopts the betaalphabetabetaalphabeta fold common to all the metal binding sequences (MBS) found in other metal transport systems (e.g., the yeast copper chaperone for superoxide dismutase CCS, the yeast copper chaperone ATX1 bound to Hg(II), and most recently Cu(I), the bacterial copper binding protein, CopZ, and the bacterial Hg(II) binding protein MerP), although substantial differences were found in the metal binding loop. Similar to ATX1, MNK1 binds Cu(I) in a distorted linear bicoordinate geometry. As with MerP, MNK1 has a high affinity for both Hg(II) and Cu(I), although it displays a marked preference for Cu(I). In addition, we found that F71 is a key residue in the compact folding of MNK1, and its mutation to alanine results in an unfolded structure. The homologous residue in MerP has also been mutated with similar results. Finally, to understand the relationship between protein folding and metal affinity and specificity, we expressed a chimeric MBS with the MNK1 protein carrying the binding motif of MerP (CAAC-MNK1); this chimeric protein showed differences in structure and the dynamics of the binding site that may account for metal specificity.
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Affiliation(s)
- Tara M DeSilva
- Department of Neurology, Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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50
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Smirnov VV, Roth JP. Evidence for Cu−O2 Intermediates in Superoxide Oxidations by Biomimetic Copper(II) Complexes. J Am Chem Soc 2006; 128:3683-95. [PMID: 16536541 DOI: 10.1021/ja056741n] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism by which [Cu(II)(L)](OTf)2 and [Cu(II)N3(L)](OTf) (L = TEPA: tris(2-pyridylethyl)amine or TMPA: tris(2-pyridylmethyl)amine; OTf = trifluoromethanesulfonate) react with superoxide (O2*-) to form [Cu(I)(L)](OTf) and O2 is described. Evidence for a CuO2 intermediate is presented based on stopped-flow experiments and competitive oxygen (18O) kinetic isotope effects on the bimolecular reactions of (16,16)O2*- and (18,16)O2*- ((16,16)k/(18,16)k). The (16,16)k/(18,16)k fall within a narrow range from 0.9836 +/- 0.0043 to 0.9886 +/- 0.0078 for reactions of copper(II) complexes with different coordination geometries and redox potentials that span a 0.67 V range. The results are inconsistent with a mechanism that involves either rate-determining O2*- binding or one-step electron transfer. Rather a mechanism involving formation of a CuO2 intermediate prior to the loss of O2 in the rate-determining step is proposed. Calculations of similar inverse isotope effects, using stretching frequencies of CuO2 adducts generated from copper(I) complexes and O2, suggest that the intermediate has a superoxo structure. The use of 18O isotope effects to relate activated oxygen intermediates in enzymes to those derived from inorganic compounds is discussed.
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Affiliation(s)
- Valeriy V Smirnov
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA
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