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Biochemical and cellular consequences of the antithrombin p.Met1? mutation identified in a severe thrombophilic family. Oncotarget 2018; 9:33202-33214. [PMID: 30237862 PMCID: PMC6145704 DOI: 10.18632/oncotarget.26059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 07/31/2018] [Indexed: 11/25/2022] Open
Abstract
Nature is always the best inspiration for basic research. A family with severe thrombosis and antithrombin deficiency, the strongest anticoagulant, carried a new mutation affecting the translation-start codon of SERPINC1, the gene encoding antithrombin. Expression of this variant in a eukaryotic cell system produced three different antithrombins. Two downstream methionines were used as alternative initiation codons, generating highly expressed small aglycosylated antithrombins with cytoplasmic localization. Wild-type antithrombin was generated by the use of the mutated AUU as initiation codon. Actually, any codon except for the three stop codons might be used to initiate translation in this strong Kozak context. We show unexpected consequences of natural mutations affecting translation-start codons. Downstream alternative initiation AUG codons may be used when the start codon is mutated, generating smaller molecules with potential different cell localization, biochemical features and unexplored consequences. Additionally, our data further support the use of other codons apart from AUG for initiation of translation in eukaryotes.
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Kusakabe M, Ishikawa A, Ravinet M, Yoshida K, Makino T, Toyoda A, Fujiyama A, Kitano J. Genetic basis for variation in salinity tolerance between stickleback ecotypes. Mol Ecol 2016; 26:304-319. [DOI: 10.1111/mec.13875] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 08/30/2016] [Accepted: 09/07/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Makoto Kusakabe
- Atmosphere and Ocean Research Institute; The University of Tokyo; Kashiwanoha 5-1-5 Kashiwa Chiba 277-8564 Japan
- Department of Biological Science; Faculty of Science; Shizuoka University; 836 Ohya, Suruga-ku Shizuoka 422-8529 Japan
| | - Asano Ishikawa
- Division of Ecological Genetics; National Institute of Genetics; Yata 1111 Mishima Shizuoka 411-8540 Japan
| | - Mark Ravinet
- Division of Ecological Genetics; National Institute of Genetics; Yata 1111 Mishima Shizuoka 411-8540 Japan
- Centre for Ecological and Evolutionary Synthesis; University of Oslo; P.O. Box 1066 Blindern Oslo NO-0316 Oslo Norway
| | - Kohta Yoshida
- Division of Ecological Genetics; National Institute of Genetics; Yata 1111 Mishima Shizuoka 411-8540 Japan
| | - Takashi Makino
- Department of Ecology and Evolutionary Biology; Graduate School of Life Sciences; Tohoku University; Sendai Miyagi 980-8578 Japan
| | - Atsushi Toyoda
- Comparative Genomics Laboratory; National Institute of Genetics; Yata 1111 Mishima Shizuoka 411-8540 Japan
| | - Asao Fujiyama
- Comparative Genomics Laboratory; National Institute of Genetics; Yata 1111 Mishima Shizuoka 411-8540 Japan
| | - Jun Kitano
- Division of Ecological Genetics; National Institute of Genetics; Yata 1111 Mishima Shizuoka 411-8540 Japan
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Huang L, Jin X, Xia L, Wang X, Yu Y, Liu C, Shao D, Fang N, Meng C. Characterization of mitochondrial NADH dehydrogenase 1α subcomplex 10 variants in cardiac muscles from normal Wistar rats and spontaneously hypertensive rats: Implications in the pathogenesis of hypertension. Mol Med Rep 2015; 13:961-6. [PMID: 26648553 DOI: 10.3892/mmr.2015.4607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 11/05/2015] [Indexed: 11/05/2022] Open
Abstract
Mitochondrial dysfunction has been increasingly associated with the development of cardiovascular diseases, including hypertension and cardiac hypertrophy. In the present study, NADH dehydrogenase 1α subcomplex 10 (Ndufa10) was characterized from the left ventricular muscles of spontaneously hypertensive rats (SHRs) and normal Wistar Kyoto (WKY) rats. Western blot analysis demonstrated that there was a shift in the molecular weight (MW) and in the isoelectric point (pI) of the Ndufa10 protein from SHRs and WKY rats. Mass spectrometric analysis revealed that the replacement of an aspartate residue with asparagine at amino acid position 120 was the biochemical difference between the two Ndufa10 isoforms. Further analysis using the bacterially expressed proteins Ndufa10‑120N (WKY) and Ndufa10‑120D (SHR) revealed that the shift in the pI and MW of the two Ndufa10 isoforms was solely caused by the amino acid mutation, and not by post‑translational modifications. Since deficiencies of the mitochondrial complex I are the most common defects in the oxidative phosphorylation system, further studies are required to study the difference between the activities of the two Ndufa10 variants, and their role in the pathogenesis of hypertension.
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Affiliation(s)
- Liying Huang
- Department of Geriatrics, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200001, P.R. China
| | - Xian Jin
- Department of Geriatrics, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200001, P.R. China
| | - Li Xia
- Department of Pathophysiology, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, P.R. China
| | - Xiaoling Wang
- Department of Pathophysiology, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, P.R. China
| | - Yun Yu
- Department of Pathophysiology, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, P.R. China
| | - Cunfei Liu
- Department of Geriatrics, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200001, P.R. China
| | - Dongmin Shao
- Section of Vascular Biology, National Heart and Lung Institute, Imperial College London, London SW3 6LY, UK
| | - Ningyuan Fang
- Department of Geriatrics, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200001, P.R. China
| | - Chao Meng
- Department of Geriatrics, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200001, P.R. China
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Bachi A, Dalle-Donne I, Scaloni A. Redox Proteomics: Chemical Principles, Methodological Approaches and Biological/Biomedical Promises. Chem Rev 2012. [DOI: 10.1021/cr300073p] [Citation(s) in RCA: 189] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Angela Bachi
- Biological Mass Spectrometry Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | | | - Andrea Scaloni
- Proteomics & Mass Spectrometry Laboratory, ISPAAM, National Research Council, 80147 Naples, Italy
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Arnandis T, Ferrer-Vicens I, García-Trevijano ER, Miralles VJ, García C, Torres L, Viña JR, Zaragozá R. Calpains mediate epithelial-cell death during mammary gland involution: mitochondria and lysosomal destabilization. Cell Death Differ 2012; 19:1536-48. [PMID: 22555453 DOI: 10.1038/cdd.2012.46] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Our aim was to elucidate the physiological role of calpains (CAPN) in mammary gland involution. Both CAPN-1 and -2 were induced after weaning and its activity increased in isolated mitochondria and lysosomes. CAPN activation within the mitochondria could trigger the release of cytochrome c and other pro-apoptotic factors, whereas in lysosomes it might be essential for tissue remodeling by releasing cathepsins into the cytosol. Immunohistochemical analysis localized CAPNs mainly at the luminal side of alveoli. During weaning, CAPNs translocate to the lysosomes processing membrane proteins. To identify these substrates, lysosomal fractions were treated with recombinant CAPN and cleaved products were identified by 2D-DIGE. The subunit b(2) of the v-type H(+) ATPase is proteolyzed and so is the lysosomal-associated membrane protein 2a (LAMP2a). Both proteins are also cleaved in vivo. Furthermore, LAMP2a cleavage was confirmed in vitro by addition of CAPNs to isolated lysosomes and several CAPN inhibitors prevented it. Finally, in vivo inhibition of CAPN1 in 72-h-weaned mice decreased LAMP2a cleavage. Indeed, calpeptin-treated mice showed a substantial delay in tissue remodeling and involution of the mammary gland. These results suggest that CAPNs are responsible for mitochondrial and lysosomal membrane permeabilization, supporting the idea that lysosomal-mediated cell death is a new hallmark of mammary gland involution.
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Affiliation(s)
- T Arnandis
- Departamento de Bioquímica y Biología Molecular, Fundación Investigación Hospital Clínico-INCLIVA, Facultad de Medicina, Universidad de Valencia, Valencia, Spain
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6
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Changes in hepatic protein expression in spontaneously hypertensive rats suggest early stages of non-alcoholic fatty liver disease. J Proteomics 2012; 75:1752-63. [DOI: 10.1016/j.jprot.2011.12.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 11/03/2011] [Accepted: 12/10/2011] [Indexed: 02/07/2023]
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7
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Lu H, Zhang XY, Zhou YQ, Wen X, Zhu LY. Proteomic alterations in mouse kidney induced by andrographolide sodium bisulfite. Acta Pharmacol Sin 2011; 32:888-94. [PMID: 21685926 DOI: 10.1038/aps.2011.39] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIM To identify the key proteins involved in the nephrotoxicity induced by andrographolide sodium bisulfite (ASB). METHODS Male ICR mice were intravenously administrated with ASB (1000 or 150 mg·kg⁻¹·d⁻¹) for 7 d. The level of malondialdehyde (MDA) and the specific activity of superoxide dismutase (SOD) in kidneys were measured. The renal homogenates were separated by two-dimensional electrophoresis, and the differential protein spots were identified using a matrix-assisted laser desorption/ionization (MALDI) time-of-flight (TOF)/TOF mass spectrometry. RESULTS The high dose (1000 mg/kg) of ASB significantly increased the MDA content, but decreased the SOD activity as compared to the control mice. The proteomic analysis revealed that 6 proteins were differentially expressed in the high-dose group. Two stress-responsive proteins, ie heat shock cognate 71 kDa protein (HSC70) and peroxiredoxin-6 (PRDX6), were regulated at the expression level. The remaining 4 proteins involving in cellular energy metabolism, including isoforms of methylmalonyl-coenzyme A mutase (MUT), nucleoside diphosphate-linked moiety X motif 19 (Nudix motif19), mitochondrial NADH dehydrogenase 1 alpha subcomplex subunit 10 (NDUFA10) and nucleoside diphosphate kinase B (NDK B), were modified at the post-translational levels. CONCLUSION Our findings suggest that the mitochondrion is the primary target of ASB and that ASB-induced nephrotoxicity results from oxidative stress mediated by superoxide produced by complex I.
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Wang Q, Chaerkady R, Wu J, Hwang HJ, Papadopoulos N, Kopelovich L, Maitra A, Matthaei H, Eshleman JR, Hruban RH, Kinzler KW, Pandey A, Vogelstein B. Mutant proteins as cancer-specific biomarkers. Proc Natl Acad Sci U S A 2011; 108:2444-9. [PMID: 21248225 PMCID: PMC3038743 DOI: 10.1073/pnas.1019203108] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cancer biomarkers are currently the subject of intense research because of their potential utility for diagnosis, prognosis, and targeted therapy. In theory, the gene products resulting from somatic mutations are the ultimate protein biomarkers, being not simply associated with tumors but actually responsible for tumorigenesis. We show here that the altered protein products resulting from somatic mutations can be identified directly and quantified by mass spectrometry. The peptides expressed from normal and mutant alleles were detected by selected reaction monitoring (SRM) of their product ions using a triple-quadrupole mass spectrometer. As a prototypical example of this approach, we demonstrated that it is possible to quantify the number and fraction of mutant Ras protein present in cancer cell lines. There were an average of 1.3 million molecules of Ras protein per cell, and the ratio of mutant to normal Ras proteins ranged from 0.49 to 5.6. Similarly, we found that mutant Ras proteins could be detected and quantified in clinical specimens such as colorectal and pancreatic tumor tissues as well as in premalignant pancreatic cyst fluids. In addition to answering basic questions about the relative levels of genetically abnormal proteins in tumors, this approach could prove useful for diagnostic applications.
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Affiliation(s)
- Qing Wang
- Ludwig Center for Cancer Genetics and Therapeutics and
- The Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD21231
| | - Raghothama Chaerkady
- McKusick-Nathans Institute of Genetic Medicine
- Institute of Bioinformatics, Bangalore 560066, India; and
| | - Jian Wu
- Ludwig Center for Cancer Genetics and Therapeutics and
- The Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD21231
| | - Hee Jung Hwang
- Ludwig Center for Cancer Genetics and Therapeutics and
- The Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD21231
| | - Nick Papadopoulos
- Ludwig Center for Cancer Genetics and Therapeutics and
- The Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD21231
| | - Levy Kopelovich
- Division of Cancer Prevention, National Cancer Institute, Bethesda, MD 20892
| | - Anirban Maitra
- The Sol Goldman Pancreatic Cancer Research Center, and
- Departments of Pathology and
| | - Hanno Matthaei
- The Sol Goldman Pancreatic Cancer Research Center, and
- Departments of Pathology and
| | - James R. Eshleman
- The Sol Goldman Pancreatic Cancer Research Center, and
- Departments of Pathology and
| | - Ralph H. Hruban
- The Sol Goldman Pancreatic Cancer Research Center, and
- Departments of Pathology and
| | - Kenneth W. Kinzler
- Ludwig Center for Cancer Genetics and Therapeutics and
- The Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD21231
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine
- The Sol Goldman Pancreatic Cancer Research Center, and
- Departments of Pathology and
- Biological Chemistry, Johns Hopkins Medical Institutions, Baltimore, MD, 21205
| | - Bert Vogelstein
- Ludwig Center for Cancer Genetics and Therapeutics and
- The Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD21231
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Koopman WJH, Nijtmans LGJ, Dieteren CEJ, Roestenberg P, Valsecchi F, Smeitink JAM, Willems PHGM. Mammalian mitochondrial complex I: biogenesis, regulation, and reactive oxygen species generation. Antioxid Redox Signal 2010; 12:1431-70. [PMID: 19803744 DOI: 10.1089/ars.2009.2743] [Citation(s) in RCA: 301] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Virtually every mammalian cell contains mitochondria. These double-membrane organelles continuously change shape and position and contain the complete metabolic machinery for the oxidative conversion of pyruvate, fatty acids, and amino acids into ATP. Mitochondria are crucially involved in cellular Ca2+ and redox homeostasis and apoptosis induction. Maintenance of mitochondrial function and integrity requires an inside-negative potential difference across the mitochondrial inner membrane. This potential is sustained by the electron-transport chain (ETC). NADH:ubiquinone oxidoreductase or complex I (CI), the first and largest protein complex of the ETC, couples the oxidation of NADH to the reduction of ubiquinone. During this process, electrons can escape from CI and react with ambient oxygen to produce superoxide and derived reactive oxygen species (ROS). Depending on the balance between their production and removal by antioxidant systems, ROS may function as signaling molecules or induce damage to a variety of biomolecules or both. The latter ultimately leads to a loss of mitochondrial and cellular function and integrity. In this review, we discuss (a) the role of CI in mitochondrial functioning; (b) the composition, structure, and biogenesis of CI; (c) regulation of CI function; (d) the role of CI in ROS generation; and (e) adaptive responses to CI deficiency.
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Affiliation(s)
- Werner J H Koopman
- Department of Biochemistry, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Agrawal P, Kumar S, Das HR. Mass spectrometric characterization of isoform variants of peanut (Arachis hypogaea) stem lectin (SL-I). J Proteomics 2010; 73:1573-86. [PMID: 20348039 DOI: 10.1016/j.jprot.2010.03.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Revised: 02/11/2010] [Accepted: 03/10/2010] [Indexed: 12/31/2022]
Abstract
Matrix assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometric (MS) analysis of purified Arachis hypogaea stem lectin (SL-I) and its tryptic digests suggested it to be an isoformic glucose/mannose binding lectin. Two-dimensional gel electrophoresis of SL-I indicated six isoforms (A1-A6), which were confirmed by Western blotting and MALDI-TOF MS analysis. Comparative analysis of peptide mass spectra of the isoforms matched with A. hypogaea lectins with three different accession numbers (Q43376_ARAHY, Q43377_ARAHY, Q70DJ5_ARAHY). Tandem mass spectrometric (MS/MS) analysis of tryptic peptides revealed these to be isoformic variants with altered amino acid sequences. Among the peptides, the peptide T12 showed major variation. The (199)Val-Ser-Tyr-Asn(202) sequence in peptide T12 of A1 and A2 was replaced by (199)Leu-Ser-His-Glu(202) in A3 and A4 (T12') while in A5 and A6 this sequence was (199)Val-Ser-Tyr-Val(202) (T12''). Peptide T1 showed the presence of (10)Asn in the isoforms A1-A5 while in A6 this amino acid was replaced by (10)Lys (T1'). Overall amino acid sequence as identified by MS/MS showed a high degree of similarity between A1, A2 and among A3, A4, A5. Carbohydrate binding domain and adenine binding site seem to be conserved.
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Affiliation(s)
- Praveen Agrawal
- Proteomics and Structural Biology Division, Institute of Genomics and Integrative Biology, Delhi, India
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Ordóñez A, Martínez-Martínez I, Corrales FJ, Miqueo C, Miñano A, Vicente V, Corral J. Effect of citrullination on the function and conformation of antithrombin. FEBS J 2009; 276:6763-72. [DOI: 10.1111/j.1742-4658.2009.07391.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Santamaría E, Mora MI, Muñoz J, Sánchez-Quiles V, Fernández-Irigoyen J, Prieto J, Corrales FJ. Regulation of stathmin phosphorylation in mouse liver progenitor-29 cells during proteasome inhibition. Proteomics 2009; 9:4495-506. [DOI: 10.1002/pmic.200900110] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Díaz-Lagares A, Alegre E, Arroyo A, Corrales FJ, González Á. Tyrosine nitration in the human leucocyte antigen-G-binding domain of the Ig-like transcript 2 protein. FEBS J 2009; 276:4233-43. [DOI: 10.1111/j.1742-4658.2009.07131.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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14
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Navarro G, Aymerich MS, Marcellino D, Cortés A, Casadó V, Mallol J, Canela EI, Agnati L, Woods AS, Fuxe K, Lluís C, Lanciego JL, Ferré S, Franco R. Interactions between calmodulin, adenosine A2A, and dopamine D2 receptors. J Biol Chem 2009; 284:28058-28068. [PMID: 19632986 DOI: 10.1074/jbc.m109.034231] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Ca(2+)-binding protein calmodulin (CaM) has been shown to bind directly to cytoplasmic domains of some G protein-coupled receptors, including the dopamine D(2) receptor. CaM binds to the N-terminal portion of the long third intracellular loop of the D(2) receptor, within an Arg-rich epitope that is also involved in the binding to G(i/o) proteins and to the adenosine A(2A) receptor, with the formation of A(2A)-D(2) receptor heteromers. In the present work, by using proteomics and bioluminescence resonance energy transfer (BRET) techniques, we provide evidence for the binding of CaM to the A(2A) receptor. By using BRET and sequential resonance energy transfer techniques, evidence was obtained for CaM-A(2A)-D(2) receptor oligomerization. BRET competition experiments indicated that, in the A(2A)-D(2) receptor heteromer, CaM binds preferentially to a proximal C terminus epitope of the A(2A) receptor. Furthermore, Ca(2+) was found to induce conformational changes in the CaM-A(2A)-D(2) receptor oligomer and to selectively modulate A(2A) and D(2) receptor-mediated MAPK signaling in the A(2A)-D(2) receptor heteromer. These results may have implications for basal ganglia disorders, since A(2A)-D(2) receptor heteromers are being considered as a target for anti-parkinsonian agents.
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Affiliation(s)
- Gemma Navarro
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
| | - Marisol S Aymerich
- Centro de Investigación Médica Aplicada Neurociencias (CIMA), Universidad de Navarra, Avda. Pio XII 55, 31008 Pamplona, Spain
| | - Daniel Marcellino
- Department of Neuroscience, Karolinska Institute, 17177 Stockholm, Sweden
| | - Antoni Cortés
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
| | - Vicent Casadó
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
| | - Josefa Mallol
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
| | - Enric I Canela
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
| | - Luigi Agnati
- Department of Neuroscience, Karolinska Institute, 17177 Stockholm, Sweden
| | - Amina S Woods
- National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, Baltimore, Maryland 21224
| | - Kjell Fuxe
- Department of Neuroscience, Karolinska Institute, 17177 Stockholm, Sweden
| | - Carmen Lluís
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
| | - Jose Luis Lanciego
- Centro de Investigación Médica Aplicada Neurociencias (CIMA), Universidad de Navarra, Avda. Pio XII 55, 31008 Pamplona, Spain
| | - Sergi Ferré
- National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, Baltimore, Maryland 21224
| | - Rafael Franco
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas, and Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain; Centro de Investigación Médica Aplicada Neurociencias (CIMA), Universidad de Navarra, Avda. Pio XII 55, 31008 Pamplona, Spain.
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15
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Meng C, Jin X, Xia L, Shen SM, Wang XL, Cai J, Chen GQ, Wang LS, Fang NY. Alterations of mitochondrial enzymes contribute to cardiac hypertrophy before hypertension development in spontaneously hypertensive rats. J Proteome Res 2009; 8:2463-75. [PMID: 19265432 DOI: 10.1021/pr801059u] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mitochondrial dysfunction is recently thought to be tightly associated with the development of cardiac hypertrophy as well as hypertension. However, the detailed molecular events in mitochondria at early stages of hypertrophic pathogenesis are still unclear. Applying two-dimensional fluorescence difference gel electrophoresis (2D-DIGE) combined with MALDI-TOF/TOF tandem mass spectrometry, here we identified the changed mitochondrial proteins of left ventricular mitochondria in prehypertensive/hypertensive stages of cardiac hypertrophy through comparing spontaneously hypertensive rats (SHR) and the age-matched normotensive Wistar Kyoto (WKY) rats. The results revealed that in the hypertrophic left ventricle of SHR as early as 4 weeks old with normal blood pressure, 33 mitochondrial protein spots presented significant alterations, with 17 down-regulated and 16 up-regulated. Such alterations were much greater than those in 20-week-old SHR with elevated blood pressure. Of the total alterations, the expression of two mitochondrial enzymes, trifunctional enzyme alpha subunit (Hadha) and NADH dehydrogenase 1 alpha subcomplex 10 (Ndufa10), were found to have special expression modification patterns in SHR strain. These data would provide new clues to investigate the potential contribution of mitochondrial dysfunction to the development of cardiac hypertrophy.
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Affiliation(s)
- Chao Meng
- The Department of Geriatrics, Ren-Ji Hospital, Shanghai Jiao-Tong University School of Medicine (SJTU-SM), Shanghai 200001, China
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16
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Nitration of cathepsin D enhances its proteolytic activity during mammary gland remodelling after lactation. Biochem J 2009; 419:279-88. [DOI: 10.1042/bj20081746] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Proteomic studies in the mammary gland of control lactating and weaned rats have shown that there is an increased pattern of nitrated proteins during weaning when compared with controls. Here we report the novel finding that cathepsin D is nitrated during weaning. The expression and protein levels of this enzyme are increased after 8 h of litter removal and this up-regulation declines 5 days after weaning. However, there is a marked delay in cathepsin D activity since it does not increase until 2 days post-weaning and remains high thereafter. In order to find out whether nitration of cathepsin D regulates its activity, iNOS (inducible nitric oxide synthase)−/− mice were used. The expression and protein levels of this enzyme were similar to WT (wild-type) animals, but the proteolytic activity was significantly reduced during weaning in knockout compared to WT mice. in vitro treatment of recombinant human cathepsin D or lactating mammary gland homogenates with relatively low concentrations of peroxynitrite enhances the nitration as well as specific activity of this enzyme. Using MS, it has been shown that the residue Tyr168 was nitrated. All of these results show that protein nitration during weaning might be a signalling pathway involved in mammary gland remodelling.
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