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Shim D, Han J. Coordination chemistry of mitochondrial copper metalloenzymes: exploring implications for copper dyshomeostasis in cell death. BMB Rep 2023; 56:575-583. [PMID: 37915136 PMCID: PMC10689082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 10/01/2023] [Accepted: 10/16/2023] [Indexed: 11/03/2023] Open
Abstract
Mitochondria, fundamental cellular organelles that govern energy metabolism, hold a pivotal role in cellular vitality. While consuming dioxygen to produce adenosine triphosphate (ATP), the electron transfer process within mitochondria can engender the formation of reactive oxygen species that exert dual roles in endothelial homeostatic signaling and oxidative stress. In the context of the intricate electron transfer process, several metal ions that include copper, iron, zinc, and manganese serve as crucial cofactors in mitochondrial metalloenzymes to mediate the synthesis of ATP and antioxidant defense. In this mini review, we provide a comprehensive understanding of the coordination chemistry of mitochondrial cuproenzymes. In detail, cytochrome c oxidase (CcO) reduces dioxygen to water coupled with proton pumping to generate an electrochemical gradient, while superoxide dismutase 1 (SOD1) functions in detoxifying superoxide into hydrogen peroxide. With an emphasis on the catalytic reactions of the copper metalloenzymes and insights into their ligand environment, we also outline the metalation process of these enzymes throughout the copper trafficking system. The impairment of copper homeostasis can trigger mitochondrial dysfunction, and potentially lead to the development of copper-related disorders. We describe the current knowledge regarding copper-mediated toxicity mechanisms, thereby shedding light on prospective therapeutic strategies for pathologies intertwined with copper dyshomeostasis. [BMB Reports 2023; 56(11): 575-583].
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Affiliation(s)
- Daeun Shim
- Department of Applied Chemistry, University of Seoul, Seoul 02504, Korea
| | - Jiyeon Han
- Department of Applied Chemistry, University of Seoul, Seoul 02504, Korea
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Mauri A, Saielli LA, Alfei E, Iascone M, Marchetti D, Cattaneo E, Di Lauro A, Antonelli L, Alberti L, Bonaventura E, Veggiotti P, Spaccini L, Cereda C. Menkes disease complicated by concurrent ACY1 deficiency: A case report. Front Genet 2023; 14:1077625. [PMID: 36936426 PMCID: PMC10017521 DOI: 10.3389/fgene.2023.1077625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/06/2023] [Indexed: 03/06/2023] Open
Abstract
Introduction: Menkes disease is an X-linked recessive condition caused by mutations in the ATP7A gene, which leads to severe copper deficiency. Aminoacylase-1 deficiency is a rare inborn error of metabolism caused by homozygous or compound heterozygous variant in the ACY1 gene, characterized by increased urinary excretion of specific N-acetyl amino acids. Case presentation: We report an infant with neurological findings such as seizures, neurodevelopmental delay and hypotonia. Metabolic screening showed low serum copper and ceruloplasmin, and increased urinary excretion of several N-acetylated amino acids. Whole-exome sequencing analysis (WES) revealed the novel de novo variant c.3642_3649dup (p.Ala1217Aspfs*2) in the ATP7A gene, leading to a diagnosis of Menkes disease, and the simultaneous presence of the homozygous ACY1 variant c.1057C>T (p.Arg353Cys) causative of Aminoacylase-1 deficiency. Conclusion: Our patient had two rare conditions with different treatment courses but overlapping clinical features. The identified novel ATP7A mutation associated with Menkes disease expands the ATP7A gene spectrum.
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Affiliation(s)
- Alessia Mauri
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
- Center of Functional Genomics and Rare Diseases, Buzzi Children’s Hospital, Milan, Italy
| | - Laura Assunta Saielli
- Center of Functional Genomics and Rare Diseases, Buzzi Children’s Hospital, Milan, Italy
| | - Enrico Alfei
- Pediatric Neurology Unit, Buzzi Children’s Hospital, Milan, Italy
| | | | | | - Elisa Cattaneo
- Clinical Genetics Unit, Buzzi Children’s Hospital, Milan, Italy
| | - Anna Di Lauro
- Center of Functional Genomics and Rare Diseases, Buzzi Children’s Hospital, Milan, Italy
| | - Laura Antonelli
- Center of Functional Genomics and Rare Diseases, Buzzi Children’s Hospital, Milan, Italy
| | - Luisella Alberti
- Center of Functional Genomics and Rare Diseases, Buzzi Children’s Hospital, Milan, Italy
| | | | - Pierangelo Veggiotti
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
- Pediatric Neurology Unit, Buzzi Children’s Hospital, Milan, Italy
| | | | - Cristina Cereda
- Center of Functional Genomics and Rare Diseases, Buzzi Children’s Hospital, Milan, Italy
- *Correspondence: Cristina Cereda,
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Dame C, Horn D, Schomburg L, Grünhagen J, Chillon TS, Tietze A, Vogt A, Bührer C. Fatal congenital copper transport defect caused by a homozygous likely pathogenic variant of SLC31A1. Clin Genet 2022; 103:585-589. [PMID: 36562171 DOI: 10.1111/cge.14289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Known hereditary human diseases featuring impaired copper trafficking across cellular membranes involve ATP7A (Menkes disease, occipital horn disease, X-linked spinal muscular atrophy type 3) and ATP7B (Wilson disease). Herein, we report a newborn infant of consanguineous parents with a homozygous pathogenic variant in a highly conserved sequence of SLC31A1, coding for the copper influx transporter 1, CTR1. This missense variant, c.236T > C, was detected by whole exome sequencing. The infant was born with pulmonary hypoplasia and suffered from severe respiratory distress immediately after birth, necessitating aggressive mechanical ventilation. At 2 weeks of age, multifocal brain hemorrhages were diagnosed by cerebral ultrasound and magnetic resonance imaging, together with increased tortuosity of cerebral arteries. Ensuing seizures were only partly controlled by antiepileptic drugs, and the infant became progressively comatose. Laboratory investigations revealed very low serum concentrations of copper and ceruloplasmin. No hair shaft abnormalities were detected by dermatoscopy or light microscopic analyses of embedded hair shafts obtained at 4 weeks of life. The infant died after redirection of care and elective cessation of invasive mechanical ventilation at 1 month of age. This case adds SLC31A1 to the genes implicated in severe hereditary disorders of copper transport in humans.
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Affiliation(s)
- Christof Dame
- Department of Neonatology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Denise Horn
- Department of Human Genetics, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Lutz Schomburg
- Department of Experimental Endocrinology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Johannes Grünhagen
- Department of Human Genetics, Charité Universitätsmedizin Berlin, Berlin, Germany.,Department of Human Genetics, Labor Berlin Charité Vivantes, Berlin, Germany
| | - Thilo Samson Chillon
- Department of Experimental Endocrinology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Anna Tietze
- Department of Neuroradiology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Annika Vogt
- Department of Dermatology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Christoph Bührer
- Department of Neonatology, Charité Universitätsmedizin Berlin, Berlin, Germany
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Shalev DE. Studying Peptide-Metal Ion Complex Structures by Solution-State NMR. Int J Mol Sci 2022; 23. [PMID: 36555599 DOI: 10.3390/ijms232415957] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/06/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Metal chelation can provide structural stability and form reactive centers in metalloproteins. Approximately one third of known protein structures are metalloproteins, and metal binding, or the lack thereof, is often implicated in disease, making it necessary to be able to study these systems in detail. Peptide-metal complexes are both present in nature and can provide a means to focus on the binding region of a protein and control experimental variables to a high degree. Structural studies of peptide complexes with metal ions by nuclear magnetic resonance (NMR) were surveyed for all the essential metal complexes and many non-essential metal complexes. The various methods used to study each metal ion are presented together with examples of recent research. Many of these metal systems have been individually reviewed and this current overview of NMR studies of metallopeptide complexes aims to provide a basis for inspiration from structural studies and methodology applied in the field.
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