51
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Guo X, Park JE, Gallart-Palau X, Sze SK. Oxidative Damage to the TCA Cycle Enzyme MDH1 Dysregulates Bioenergetic Enzymatic Activity in the Aged Murine Brain. J Proteome Res 2020; 19:1706-1717. [DOI: 10.1021/acs.jproteome.9b00861] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xue Guo
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Jung Eun Park
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Xavier Gallart-Palau
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Siu Kwan Sze
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
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52
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Arakhamia T, Lee CE, Carlomagno Y, Duong DM, Kundinger SR, Wang K, Williams D, DeTure M, Dickson DW, Cook CN, Seyfried NT, Petrucelli L, Fitzpatrick AWP. Posttranslational Modifications Mediate the Structural Diversity of Tauopathy Strains. Cell 2020; 180:633-644.e12. [PMID: 32032505 PMCID: PMC7491959 DOI: 10.1016/j.cell.2020.01.027] [Citation(s) in RCA: 258] [Impact Index Per Article: 64.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/23/2019] [Accepted: 01/21/2020] [Indexed: 01/21/2023]
Abstract
Tau aggregation into insoluble filaments is the defining pathological hallmark of tauopathies. However, it is not known what controls the formation and templated seeding of strain-specific structures associated with individual tauopathies. Here, we use cryo-electron microscopy (cryo-EM) to determine the structures of tau filaments from corticobasal degeneration (CBD) human brain tissue. Cryo-EM and mass spectrometry of tau filaments from CBD reveal that this conformer is heavily decorated with posttranslational modifications (PTMs), enabling us to map PTMs directly onto the structures. By comparing the structures and PTMs of tau filaments from CBD and Alzheimer's disease, it is found that ubiquitination of tau can mediate inter-protofilament interfaces. We propose a structure-based model in which cross-talk between PTMs influences tau filament structure, contributing to the structural diversity of tauopathy strains. Our approach establishes a framework for further elucidating the relationship between the structures of polymorphic fibrils, including their PTMs, and neurodegenerative disease.
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Affiliation(s)
- Tamta Arakhamia
- Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY 10027, USA; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Christina E Lee
- Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY 10027, USA; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Yari Carlomagno
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Duc M Duong
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Sean R Kundinger
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Kevin Wang
- Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY 10027, USA; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Dewight Williams
- John M. Cowley Center for High Resolution Electron Microscopy, Arizona State University, Tempe, AZ 85287, USA
| | - Michael DeTure
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Dennis W Dickson
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Casey N Cook
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL 32224, USA
| | - Nicholas T Seyfried
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA; Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | - Anthony W P Fitzpatrick
- Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY 10027, USA; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, NY 10032, USA.
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53
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Onisko BC. The Hydroxyproline Proteome of HeLa Cells with Emphasis on the Active Sites of Protein Disulfide Isomerases. J Proteome Res 2020; 19:756-768. [DOI: 10.1021/acs.jproteome.9b00625] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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54
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Citrullination facilitates cross-reactivity of rheumatoid factor with non-IgG1 Fc epitopes in rheumatoid arthritis. Sci Rep 2019; 9:12068. [PMID: 31427662 PMCID: PMC6700074 DOI: 10.1038/s41598-019-48176-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 07/16/2019] [Indexed: 11/16/2022] Open
Abstract
Rheumatoid factor (RF) and anti-citrullinated protein antibodies (ACPAs) are the two most prevalent autoantibodies in rheumatoid arthritis (RA), and are thought to have distinct autoantigen targets. Whilst RF targets the Fc region of antibodies, ACPAs target a far broader spectrum of citrullinated peptides. Here we demonstrate significant sequence and structural homology between proposed RF target epitopes in IgG1 Fc and the ACPA target fibrinogen. Two of the three homologous sequences were susceptible to citrullination, and this modification, which occurs extensively in RA, permitted significant cross-reactivity of RF+ patient sera with fibrinogen in both western blots and ELISAs. Crucially, this reactivity was specific to RF as it was absent in RF− patient and healthy control sera, and could be inhibited by pre-incubation with IgG1 Fc. These studies establish fibrinogen as a common target for both RF and ACPAs, and suggest a new mechanism in RF-mediated autoimmune diseases wherein RF may act as a precursor from which the ACPA response evolves.
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55
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Moruno Algara M, Kuczyńska‐Wiśnik D, Dębski J, Stojowska‐Swędrzyńska K, Sominka H, Bukrejewska M, Laskowska E. Trehalose protects
Escherichia coli
against carbon stress manifested by protein acetylation and aggregation. Mol Microbiol 2019; 112:866-880. [DOI: 10.1111/mmi.14322] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/01/2019] [Indexed: 12/22/2022]
Affiliation(s)
- María Moruno Algara
- Faculty of Biology, Department of General and Medical Biochemistry University of Gdansk Wita Stwosza 5980‐308Gdansk Poland
| | - Dorota Kuczyńska‐Wiśnik
- Faculty of Biology, Department of General and Medical Biochemistry University of Gdansk Wita Stwosza 5980‐308Gdansk Poland
| | - Janusz Dębski
- Mass Spectrometry Laboratory IBB PAS ul. Pawińskiego 5A02‐106Warsaw Poland
| | - Karolina Stojowska‐Swędrzyńska
- Faculty of Biology, Department of General and Medical Biochemistry University of Gdansk Wita Stwosza 5980‐308Gdansk Poland
| | - Hanna Sominka
- Faculty of Biology, Department of General and Medical Biochemistry University of Gdansk Wita Stwosza 5980‐308Gdansk Poland
| | - Małgorzata Bukrejewska
- Faculty of Biology, Department of General and Medical Biochemistry University of Gdansk Wita Stwosza 5980‐308Gdansk Poland
| | - Ewa Laskowska
- Faculty of Biology, Department of General and Medical Biochemistry University of Gdansk Wita Stwosza 5980‐308Gdansk Poland
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56
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Liu T, Wang Z, Guo P, Ding N. Electrostatic mechanism of V600E mutation-induced B-Raf constitutive activation in colorectal cancer: molecular implications for the selectivity difference between type-I and type-II inhibitors. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2018; 48:73-82. [DOI: 10.1007/s00249-018-1334-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/10/2018] [Accepted: 09/06/2018] [Indexed: 02/04/2023]
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Šoštarić N, O'Reilly FJ, Giansanti P, Heck AJR, Gavin AC, van Noort V. Effects of Acetylation and Phosphorylation on Subunit Interactions in Three Large Eukaryotic Complexes. Mol Cell Proteomics 2018; 17:2387-2401. [PMID: 30181345 DOI: 10.1074/mcp.ra118.000892] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/27/2018] [Indexed: 01/18/2023] Open
Abstract
Protein post-translational modifications (PTMs) have an indispensable role in living cells as they expand chemical diversity of the proteome, providing a fine regulatory layer that can govern protein-protein interactions in changing environmental conditions. Here we investigated the effects of acetylation and phosphorylation on the stability of subunit interactions in purified Saccharomyces cerevisiae complexes, namely exosome, RNA polymerase II and proteasome. We propose a computational framework that consists of conformational sampling of the complexes by molecular dynamics simulations, followed by Gibbs energy calculation by MM/GBSA. After benchmarking against published tools such as FoldX and Mechismo, we could apply the framework for the first time on large protein assemblies with the aim of predicting the effects of PTMs located on interfaces of subunits on binding stability. We discovered that acetylation predominantly contributes to subunits' interactions in a locally stabilizing manner, while phosphorylation shows the opposite effect. Even though the local binding contributions of PTMs may be predictable to an extent, the long range effects and overall impact on subunits' binding were only captured because of our dynamical approach. Employing the developed, widely applicable workflow on other large systems will shed more light on the roles of PTMs in protein complex formation.
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Affiliation(s)
- Nikolina Šoštarić
- KU Leuven, Centre of Microbial and Plant Genetics, Kasteelpark Arenberg 20, Leuven, B-3001, Belgium
| | - Francis J O'Reilly
- European Molecular Biology Laboratory, Structural and Computational Biology Unit, Heidelberg, Germany; Technical University of Berlin, Berlin, Germany
| | - Piero Giansanti
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science4Life, Utrecht University, Utrecht, The Netherlands; Netherlands Proteomics Centre, Utrecht, The Netherlands; Chair of Proteomics and Bioanalytics, Technical University of Munich, Freising, Germany
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science4Life, Utrecht University, Utrecht, The Netherlands; Netherlands Proteomics Centre, Utrecht, The Netherlands
| | - Anne-Claude Gavin
- European Molecular Biology Laboratory, Structural and Computational Biology Unit, Heidelberg, Germany
| | - Vera van Noort
- KU Leuven, Centre of Microbial and Plant Genetics, Kasteelpark Arenberg 20, Leuven, B-3001, Belgium; Leiden University, Institute of Biology Leiden, Leiden, The Netherlands.
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58
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Öztürk MA, Cojocaru V, Wade RC. Dependence of Chromatosome Structure on Linker Histone Sequence and Posttranslational Modification. Biophys J 2018; 114:2363-2375. [PMID: 29759374 PMCID: PMC6129471 DOI: 10.1016/j.bpj.2018.04.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/18/2018] [Accepted: 04/09/2018] [Indexed: 12/20/2022] Open
Abstract
Linker histone (LH) proteins play a key role in higher-order structuring of chromatin for the packing of DNA in eukaryotic cells and in the regulation of genomic function. The common fruit fly (Drosophila melanogaster) has a single somatic isoform of the LH (H1). It is thus a useful model organism for investigating the effects of the LH on nucleosome compaction and the structure of the chromatosome, the complex formed by binding of an LH to a nucleosome. The structural and mechanistic details of how LH proteins bind to nucleosomes are debated. Here, we apply Brownian dynamics simulations to compare the nucleosome binding of the globular domain of D. melanogaster H1 (gH1) and the corresponding chicken (Gallus gallus) LH isoform, gH5, to identify residues in the LH that critically affect the structure of the chromatosome. Moreover, we investigate the effects of posttranslational modifications on the gH1 binding mode. We find that certain single-point mutations and posttranslational modifications of the LH proteins can significantly affect chromatosome structure. These findings indicate that even subtle differences in LH sequence can significantly shift the chromatosome structural ensemble and thus have implications for chromatin structure and transcriptional regulation.
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Affiliation(s)
- Mehmet Ali Öztürk
- Molecular and Cellular Modeling Group, Heidelberg Institute for Theoretical Studies (HITS), Heidelberg, Germany; The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology, Heidelberg University, Heidelberg, Germany
| | - Vlad Cojocaru
- Computational Structural Biology Laboratory, Department of Cellular and Developmental Biology, Max Planck Institute for Molecular Biomedicine, Münster, Germany; Center for Multiscale Theory and Computation, Westfälische Wilhelms University, Münster, Germany
| | - Rebecca C Wade
- Molecular and Cellular Modeling Group, Heidelberg Institute for Theoretical Studies (HITS), Heidelberg, Germany; Center for Molecular Biology (ZMBH), DKFZ-ZMBH Alliance, Heidelberg University, Heidelberg, Germany; Interdisciplinary Center for Scientific Computing (IWR), Heidelberg, Germany.
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59
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Türkowsky D, Esken J, Goris T, Schubert T, Diekert G, Jehmlich N, von Bergen M. A Retentive Memory of Tetrachloroethene Respiration in Sulfurospirillum halorespirans - involved Proteins and a possible link to Acetylation of a Two-Component Regulatory System. J Proteomics 2018; 181:36-46. [PMID: 29617628 DOI: 10.1016/j.jprot.2018.03.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/08/2018] [Accepted: 03/27/2018] [Indexed: 10/17/2022]
Abstract
Organohalide respiration (OHR), comprising the reductive dehalogenation of halogenated organic compounds, is subject to a unique memory effect and long-term transcriptional downregulation of the involved genes in Sulfurospirillum multivorans. Gene expression ceases slowly over approximately 100 generations in the absence of tetrachloroethene (PCE). However, the molecular mechanisms of this regulation process are not understood. We show here that Sulfurospirillum halorespirans undergoes the same type of regulation when cultivated without chlorinated ethenes for a long period of time. In addition, we compared the proteomes of S. halorespirans cells cultivated in the presence of PCE with those of cells long- and short-term cultivated with nitrate as the sole electron acceptor. Important OHR-related proteins previously unidentified in S. multivorans include a histidine kinase, a putative quinol dehydrogenase membrane protein, and a PCE-induced porin. Since for some regulatory proteins a posttranslational regulation of activity by lysine acetylations is known, we also analyzed the acetylome of S. halorespirans, revealing that 32% of the proteome was acetylated in at least one condition. The data indicate that the response regulator and the histidine kinase of a two-component system most probably involved in induction of PCE respiration are highly acetylated during short-term cultivation with nitrate in the absence of PCE. SIGNIFICANCE The so far unique long-term downregulation of organohalide respiration is now identified in a second species suggesting a broader distribution of this regulatory phenomenon. An improved protein extraction method allowed the identification of proteins most probably involved in transcriptional regulation of OHR in Sulfurospirillum spp. Our data indicate that acetylations of regulatory proteins are involved in this extreme, sustained standby-mode of metabolic enzymes in the absence of a substrate. This first published acetylome of Epsilonproteobacteria might help to study other ecologically or medically important species of this clade.
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Affiliation(s)
- Dominique Türkowsky
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Permoserstraße 15, 04318 Leipzig, Germany
| | - Jens Esken
- Department of Applied and Ecological Microbiology, Institute of Microbiology, Friedrich Schiller University, Philosophenweg 12, 07743 Jena, Germany
| | - Tobias Goris
- Department of Applied and Ecological Microbiology, Institute of Microbiology, Friedrich Schiller University, Philosophenweg 12, 07743 Jena, Germany
| | - Torsten Schubert
- Department of Applied and Ecological Microbiology, Institute of Microbiology, Friedrich Schiller University, Philosophenweg 12, 07743 Jena, Germany
| | - Gabriele Diekert
- Department of Applied and Ecological Microbiology, Institute of Microbiology, Friedrich Schiller University, Philosophenweg 12, 07743 Jena, Germany
| | - Nico Jehmlich
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Permoserstraße 15, 04318 Leipzig, Germany
| | - Martin von Bergen
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Permoserstraße 15, 04318 Leipzig, Germany; Institute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Brüderstraße, 34, Germany.
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60
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Sarikhani M, Mishra S, Maity S, Kotyada C, Wolfgeher D, Gupta MP, Singh M, Sundaresan NR. SIRT2 deacetylase regulates the activity of GSK3 isoforms independent of inhibitory phosphorylation. eLife 2018; 7:32952. [PMID: 29504933 PMCID: PMC5860870 DOI: 10.7554/elife.32952] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 03/02/2018] [Indexed: 12/28/2022] Open
Abstract
Glycogen synthase kinase 3 (GSK3) is a critical regulator of diverse cellular functions involved in the maintenance of structure and function. Enzymatic activity of GSK3 is inhibited by N-terminal serine phosphorylation. However, alternate post-translational mechanism(s) responsible for GSK3 inactivation are not characterized. Here, we report that GSK3α and GSK3β are acetylated at Lys246 and Lys183, respectively. Molecular modeling and/or molecular dynamics simulations indicate that acetylation of GSK3 isoforms would hinder both the adenosine binding and prevent stable interactions of the negatively charged phosphates. We found that SIRT2 deacetylates GSK3β, and thus enhances its binding to ATP. Interestingly, the reduced activity of GSK3β is associated with lysine acetylation, but not with phosphorylation at Ser9 in hearts of SIRT2-deficient mice. Moreover, GSK3 is required for the anti-hypertrophic function of SIRT2 in cardiomyocytes. Overall, our study identified lysine acetylation as a novel post-translational modification regulating GSK3 activity.
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Affiliation(s)
- Mohsen Sarikhani
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Sneha Mishra
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Sangeeta Maity
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Chaithanya Kotyada
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru, India
| | - Donald Wolfgeher
- Department of Molecular Genetics and Cell biology, University of Chicago, Chicago, United States
| | - Mahesh P Gupta
- Department of Surgery, University of Chicago, Chicago, United States
| | - Mahavir Singh
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru, India
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SIRT2 regulates oxidative stress-induced cell death through deacetylation of c-Jun NH 2-terminal kinase. Cell Death Differ 2018; 25:1638-1656. [PMID: 29449643 DOI: 10.1038/s41418-018-0069-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 12/06/2017] [Accepted: 01/15/2018] [Indexed: 01/08/2023] Open
Abstract
c-Jun NH2-terminal kinases (JNKs) are responsive to stress stimuli and their activation regulate key cellular functions, including cell survival, growth, differentiation and aging. Previous studies demonstrate that activation of JNK requires dual phosphorylation by the mitogen-activated protein kinase kinases. However, other post-translational mechanisms involved in regulating the activity of JNK have been poorly understood. In this work, we studied the functional significance of reversible lysine acetylation in regulating the kinase activity of JNK. We found that the acetyl transferase p300 binds to, acetylates and inhibits kinase activity of JNK. Using tandem mass spectrometry, molecular modelling and molecular dynamics simulations, we found that acetylation of JNK at Lys153 would hinder the stable interactions of the negatively charged phosphates and prevent the adenosine binding to JNK. Our screening for the deacetylases found SIRT2 as a deacetylase for JNK. Mechanistically, SIRT2-dependent deacetylation enhances ATP binding and enzymatic activity of JNK towards c-Jun. Furthermore, SIRT2-mediated deacetylation favours the phosphorylation of JNK by MKK4, an upstream kinase. Our results indicate that deacetylation of JNK by SIRT2 promotes oxidative stress-induced cell death. Conversely, SIRT2 inhibition attenuates H2O2-mediated cell death in HeLa cells. SIRT2-deficient (SIRT2-KO) mice exhibit increased acetylation of JNK, which is associated with markedly reduced catalytic activity of JNK in the liver. Interestingly, SIRT2-KO mice were resistant to acetaminophen-induced liver toxicity. SIRT2-KO mice show lower cell death, minimal degenerative changes, improved liver function and survival following acetaminophen treatment. Overall, our work identifies SIRT2-mediated deacetylation of JNK as a critical regulator of cell survival during oxidative stress.
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62
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Zhou T, Erber L, Liu B, Gao Y, Ruan HB, Chen Y. Proteomic analysis reveals diverse proline hydroxylation-mediated oxygen-sensing cellular pathways in cancer cells. Oncotarget 2018; 7:79154-79169. [PMID: 27764789 PMCID: PMC5346705 DOI: 10.18632/oncotarget.12632] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 09/25/2016] [Indexed: 12/28/2022] Open
Abstract
Proline hydroxylation is a critical cellular mechanism regulating oxygen-response pathways in tumor initiation and progression. Yet, its substrate diversity and functions remain largely unknown. Here, we report a system-wide analysis to characterize proline hydroxylation substrates in cancer cells using an immunoaffinity-purification assisted proteomics strategy. We identified 562 sites from 272 proteins in HeLa cells. Bioinformatic analysis revealed that proline hydroxylation substrates are significantly enriched with mRNA processing and stress-response cellular pathways with canonical and diverse flanking sequence motifs. Structural analysis indicates a significant enrichment of proline hydroxylation participating in the secondary structure of substrate proteins. Our study identified and validated Brd4, a key transcription factor, as a novel proline hydroxylation substrate. Functional analysis showed that the inhibition of proline hydroxylation pathway significantly reduced the proline hydroxylation abundance on Brd4 and affected Brd4-mediated transcriptional activity as well as cell proliferation in AML leukemia cells. Taken together, our study identified a broad regulatory role of proline hydroxylation in cellular oxygen-sensing pathways and revealed potentially new targets that dynamically respond to hypoxia microenvironment in tumor cells.
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Affiliation(s)
- Tong Zhou
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
| | - Luke Erber
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
| | - Bing Liu
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Yankun Gao
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
| | - Hai-Bin Ruan
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Yue Chen
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA
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Mahoney BJ, Zhang M, Zintsmaster JS, Peng JW. Extended Impact of Pin1 Catalytic Loop Phosphorylation Revealed by S71E Phosphomimetic. J Mol Biol 2018; 430:710-721. [PMID: 29317221 DOI: 10.1016/j.jmb.2017.12.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 12/19/2017] [Accepted: 12/31/2017] [Indexed: 11/24/2022]
Abstract
Pin1 is a two-domain human protein that catalyzes the cis-trans isomerization of phospho-Ser/Thr-Pro (pS/T-P) motifs in numerous cell-cycle regulatory proteins. These pS/T-P motifs bind to Pin1's peptidyl-prolyl isomerase (PPIase) domain in a catalytic pocket, between an extended catalytic loop and the PPIase domain core. Previous studies showed that post-translational phosphorylation of S71 in the catalytic loop decreases substrate binding affinity and isomerase activity. To define the origins for these effects, we investigated a phosphomimetic Pin1 mutant, S71E-Pin1, using solution NMR. We find that S71E perturbs not only its host loop but also the nearby PPIase core. The perturbations identify a local network of hydrogen bonds and salt bridges that is more extended than previously thought, and includes interactions between the catalytic loop and the α2/α3 turn in the PPIase core. Explicit-solvent molecular dynamics simulations and phylogenetic analysis suggest that these interactions act as conserved "latches" between the loop and PPIase core that enhance binding of phosphorylated substrates, as they are absent in PPIases lacking pS/T-P specificity. Our results suggest that S71 is a hub residue within an electrostatic network primed for phosphorylation, and may illustrate a common mechanism of phosphorylation-mediated allostery.
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Affiliation(s)
- Brendan J Mahoney
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, United States
| | - Meiling Zhang
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, United States
| | - John S Zintsmaster
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, United States
| | - Jeffrey W Peng
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, United States.
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64
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Warnecke A, Abele S, Musunuri S, Bergquist J, Harris RA. Scavenger Receptor A Mediates the Clearance and Immunological Screening of MDA-Modified Antigen by M2-Type Macrophages. Neuromolecular Med 2017; 19:463-479. [PMID: 28828577 PMCID: PMC5683054 DOI: 10.1007/s12017-017-8461-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/10/2017] [Indexed: 01/20/2023]
Abstract
In this study, we investigated the uptake of malondialdehyde (MDA)-modified myelin oligodendrocyte glycoprotein (MOG) in the context of lipid peroxidation and its implications in CNS autoimmunity. The use of custom-produced fluorescently labeled versions of MOG or MDA-modified MOG enabled us to study and quantify the uptake by different macrophage populations and to identify the responsible receptor, namely SRA. The SRA-mediated uptake of MDA-modified MOG is roughly tenfold more efficient compared to that of the native form. Notably, this uptake is most strongly associated with anti-inflammatory M2-type macrophages. MDA-modified MOG was demonstrated to be resistant to degradation by lysine-dependent proteases in vitro, but the overall digestion fragments appeared to be similar in cell lysates, although their relative abundance appeared to be altered as a result of faster uptake. Accordingly, MDA-modified MOG is processed for presentation by APCs, allowing maximized recall proliferation of MOG35-55-specific 2D2 T cells in vitro due to higher uptake. However, MDA modification of MOG did not enhance immune priming or disease course in the in vivo MOG-EAE model, but did induce antibody responses to both MOG and MDA adducts. Taken together our results indicate that MDA adducts primarily constitute clearance signals for phagocytes and promote rapid removal of antigen, which is subjected to immunological screening by previously licensed T cells.
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MESH Headings
- Animals
- Autoantigens/immunology
- Autoantigens/metabolism
- Cells, Cultured
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Inflammation
- Lipid Peroxidation
- Lymphocyte Activation
- Macrophages/classification
- Macrophages/immunology
- Macrophages/metabolism
- Malondialdehyde/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Myelin-Oligodendrocyte Glycoprotein/immunology
- Myelin-Oligodendrocyte Glycoprotein/metabolism
- Peptide Fragments/immunology
- Peptide Fragments/metabolism
- Peptide Hydrolases/metabolism
- Proteolysis
- RAW 264.7 Cells
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
- Recombinant Proteins/immunology
- Recombinant Proteins/metabolism
- Scavenger Receptors, Class A/physiology
- T-Lymphocytes/immunology
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Affiliation(s)
- Andreas Warnecke
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, 17176, Stockholm, Sweden
| | - Sonja Abele
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, 17176, Stockholm, Sweden
| | - Sravani Musunuri
- Department of Chemistry-BMC, Analytical Chemistry and Science for Life Laboratory, Uppsala University, Box 599, 751 24, Uppsala, Sweden
| | - Jonas Bergquist
- Department of Chemistry-BMC, Analytical Chemistry and Science for Life Laboratory, Uppsala University, Box 599, 751 24, Uppsala, Sweden
| | - Robert A Harris
- Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital at Solna, 17176, Stockholm, Sweden.
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65
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Kaufmann C, Motzkus M, Sauter M. Phosphorylation of the phytosulfokine peptide receptor PSKR1 controls receptor activity. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:1411-1423. [PMID: 28338789 PMCID: PMC5441923 DOI: 10.1093/jxb/erx030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The phytosulfokine peptide receptor PSKR1 is modified by phosphorylation of its cytoplasmic kinase domain. We analyzed defined phosphorylation sites by site-directed mutagenesis with regard to kinase activity in vitro and receptor activity in planta. S696 and S698 in the juxtamembrane (JM) domain are phosphorylated in planta. The phosphomimetic S696D/S698D replacements resulted in reduced transphosphorylation activity of PSKR1 kinase in vitro but did not reduce autophosphorylation activity. Growth-promoting activity of the PSKR1(S696D/S698D) receptor isoform was impaired in the shoot but not in the root. The JM domain thus seems to be important for phosphorylation of a target protein required for shoot growth promotion. The phosphomimetic replacement T998D at the C-terminus (CT) abolished kinase activity in vitro but not receptor function in planta, indicating that additional levels of regulation exist in planta. A possible mode of receptor regulation is the interaction with regulatory proteins such as the calcium sensor calmodulin (CaM). We show that the previously reported binding of CaM2 to PSKR1 is calcium-dependent, occurs predominately to the hypophosphorylated soluble PSKR1 kinase, and does not significantly change PSKR1 kinase activity. In conclusion, our results show that peptide signaling of growth by PSKR1 is regulated by differential phosphorylation of the juxtamembrane and C-terminal domains of the intracellular receptor part and suggest that interaction of PSKR1 with CaM serves a function other than the regulation of kinase activity.
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Affiliation(s)
- Christine Kaufmann
- Entwicklungsbiologie und Physiologie der Pflanzen, Christian-Albrechts-Universität Kiel, Am Botanischen Garten 5, 24118 Kiel, Germany
| | - Michael Motzkus
- Entwicklungsbiologie und Physiologie der Pflanzen, Christian-Albrechts-Universität Kiel, Am Botanischen Garten 5, 24118 Kiel, Germany
| | - Margret Sauter
- Entwicklungsbiologie und Physiologie der Pflanzen, Christian-Albrechts-Universität Kiel, Am Botanischen Garten 5, 24118 Kiel, Germany
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66
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Yuan S, Chan HS, Hu Z. Using
PyMOL
as a platform for computational drug design. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2017. [DOI: 10.1002/wcms.1298] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shuguang Yuan
- Laboratory of Physical Chemistry of Polymers and MembranesEcole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland
| | | | - Zhenquan Hu
- High Magnetic Field LaboratoryChinese Academy of Science Hefei China
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67
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Nitration of MOG diminishes its encephalitogenicity depending on MHC haplotype. J Neuroimmunol 2016; 303:1-12. [PMID: 28011088 DOI: 10.1016/j.jneuroim.2016.11.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 11/21/2016] [Accepted: 11/23/2016] [Indexed: 12/12/2022]
Abstract
Post-translational modifications of autoantigens are hypothesized to affect their immunogenicity. We here report that nitration of tyrosine 40 in Myelin Oligodendrocyte Glycoprotein (MOG) abrogates its encephalitogenicity both at protein and peptide levels in the experimental autoimmune encephalomyelitis (EAE) model in H2b C57BL/6 mice. Furthermore, nitrated MOG displays inferior antigen-specific proliferation of 2D2 splenocytes in vitro. Conversely, H2q DBA1 mice remain fully susceptible to EAE induction using nitrated MOG as the dominant epitope of H2q mice is unaltered. Molecular modeling analysis of the MOG35-55/H2-IAb complex and bioinformatics peptide binding predictions indicate that the lack of T cell reactivity towards nitrated MOG can be attributed to the inability of murine H2-IAb to efficiently present the altered peptide ligand of MOG35-55 because the nitrated tyrosine 40 cannot be accommodated in the p1 anchor pocket. In conclusion we demonstrate nitration as a relevant determinant affecting T cell recognition of carrier antigen depending on MHC haplotype. Our data have implications for understanding the role of post-translationally modified antigen in autoimmunity.
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68
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Structural insights into the recognition of phosphorylated FUNDC1 by LC3B in mitophagy. Protein Cell 2016; 8:25-38. [PMID: 27757847 PMCID: PMC5233613 DOI: 10.1007/s13238-016-0328-8] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 09/12/2016] [Indexed: 01/09/2023] Open
Abstract
Mitophagy is an essential intracellular process that eliminates dysfunctional mitochondria and maintains cellular homeostasis. Mitophagy is regulated by the post-translational modification of mitophagy receptors. Fun14 domain-containing protein 1 (FUNDC1) was reported to be a new receptor for hypoxia-induced mitophagy in mammalian cells and interact with microtubule-associated protein light chain 3 beta (LC3B) through its LC3 interaction region (LIR). Moreover, the phosphorylation modification of FUNDC1 affects its binding affinity for LC3B and regulates selective mitophagy. However, the structural basis of this regulation mechanism remains unclear. Here, we present the crystal structure of LC3B in complex with a FUNDC1 LIR peptide phosphorylated at Ser17 (pS17), demonstrating the key residues of LC3B for the specific recognition of the phosphorylated or dephosphorylated FUNDC1. Intriguingly, the side chain of LC3B Lys49 shifts remarkably and forms a hydrogen bond and electrostatic interaction with the phosphate group of FUNDC1 pS17. Alternatively, phosphorylated Tyr18 (pY18) and Ser13 (pS13) in FUNDC1 significantly obstruct their interaction with the hydrophobic pocket and Arg10 of LC3B, respectively. Structural observations are further validated by mutation and isothermal titration calorimetry (ITC) assays. Therefore, our structural and biochemical results reveal a working model for the specific recognition of FUNDC1 by LC3B and imply that the reversible phosphorylation modification of mitophagy receptors may be a switch for selective mitophagy.
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69
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Marquez J, Lee SR, Kim N, Han J. Post-Translational Modifications of Cardiac Mitochondrial Proteins in Cardiovascular Disease: Not Lost in Translation. Korean Circ J 2016; 46:1-12. [PMID: 26798379 PMCID: PMC4720839 DOI: 10.4070/kcj.2016.46.1.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 10/26/2015] [Accepted: 10/27/2015] [Indexed: 01/08/2023] Open
Abstract
Protein post-translational modifications (PTMs) are crucial in regulating cellular biology by playing key roles in processes such as the rapid on and off switching of signaling network and the regulation of enzymatic activities without affecting gene expressions. PTMs lead to conformational changes in the tertiary structure of protein and resultant regulation of protein function such as activation, inhibition, or signaling roles. PTMs such as phosphorylation, acetylation, and S-nitrosylation of specific sites in proteins have key roles in regulation of mitochondrial functions, thereby contributing to the progression to heart failure. Despite the extensive study of PTMs in mitochondrial proteins much remains unclear. Further research is yet to be undertaken to elucidate how changes in the proteins may lead to cardiovascular and metabolic disease progression in particular. We aimed to summarize the various types of PTMs that occur in mitochondrial proteins, which might be associated with heart failure. This study will increase the understanding of cardiovascular diseases through PTM.
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Affiliation(s)
- Jubert Marquez
- Department of Health Sciences and Technology, Graduate School of Inje University, Busan, Korea
| | - Sung Ryul Lee
- Department of Health Sciences and Technology, Graduate School of Inje University, Busan, Korea.; National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Nari Kim
- Department of Health Sciences and Technology, Graduate School of Inje University, Busan, Korea.; National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Jin Han
- Department of Health Sciences and Technology, Graduate School of Inje University, Busan, Korea.; National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
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70
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Omotuyi OI, Hamada T. Human furin Cys198 imposes dihedral and positional restraints on His194 for optimal Ser386-proton transfer. J Biomol Struct Dyn 2015; 33:2442-51. [DOI: 10.1080/07391102.2015.1041552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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71
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Anderson KW, Mast N, Pikuleva IA, Turko IV. Histone H3 Ser57 and Thr58 phosphorylation in the brain of 5XFAD mice. FEBS Open Bio 2015; 5:550-6. [PMID: 26199864 PMCID: PMC4506931 DOI: 10.1016/j.fob.2015.06.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 06/18/2015] [Accepted: 06/20/2015] [Indexed: 11/22/2022] Open
Abstract
Alzheimer's disease has been shown to have a global reduction in gene expression, called an epigenetic blockade, which may be regulated by histone post-translational modifications. Histone H3 has been shown to be highly regulated by phosphorylation. We, therefore, chose H3 for investigation of phosphorylation of the core sites serine-57 (S57) and threonine-58 (T58). Hemispheres of brains from a mouse model of rapid amyloid deposition (5XFAD) were used for measurement of S57 and T58 phosphorylation. Multiple reaction monitoring (MRM) was used to measure the level of phosphorylation, which was normalized to a non-modified "housekeeping" peptide of H3. S57 phosphorylation was decreased by 40%, T58 phosphorylation was decreased by 45%, and doubly phosphorylated S57pT58p was decreased by 30% in 5XFAD brain in comparison to C57BL/6J age- and sex-matched wild type controls. Amyloid-β (Aβ) and amyloid precursor protein were also measured to confirm that 5XFAD mice produced high levels of Aβ. Decreased phosphorylation of these sites in close proximity to DNA may lead to stabilization of DNA-histone interactions and a condensed chromatin state, consistent with the epigenetic blockade associated with AD. Our findings of H3 sites S57 and T58 exhibiting lower levels of phosphorylation in 5XFAD model compared to wild type control implicate these sites in the epigenetic blockade in neurodegeneration pathology.
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Affiliation(s)
- Kyle W. Anderson
- Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Biomolecular Measurement Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
| | - Natalia Mast
- Department of Ophthalmology and Visual Sciences, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Irina A. Pikuleva
- Department of Ophthalmology and Visual Sciences, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Illarion V. Turko
- Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Biomolecular Measurement Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
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