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Taylor BC, Steinthal LH, Dias M, Yalamanchili HK, Ochsner SA, Zapata GE, Mehta NR, McKenna NJ, Young NL, Nuotio-Antar AM. Histone proteoform analysis reveals epigenetic changes in adult mouse brown adipose tissue in response to cold stress. Epigenetics Chromatin 2024; 17:12. [PMID: 38678237 PMCID: PMC11055387 DOI: 10.1186/s13072-024-00536-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 04/09/2024] [Indexed: 04/29/2024] Open
Abstract
BACKGROUND Regulation of the thermogenic response by brown adipose tissue (BAT) is an important component of energy homeostasis with implications for the treatment of obesity and diabetes. Our preliminary analyses of RNA-Seq data uncovered many nodes representing epigenetic modifiers that are altered in BAT in response to chronic thermogenic activation. Thus, we hypothesized that chronic thermogenic activation broadly alters epigenetic modifications of DNA and histones in BAT. RESULTS Motivated to understand how BAT function is regulated epigenetically, we developed a novel method for the first-ever unbiased top-down proteomic quantitation of histone modifications in BAT and validated our results with a multi-omic approach. To test our hypothesis, wildtype male C57BL/6J mice were housed under chronic conditions of thermoneutral temperature (TN, 28°C), mild cold/room temperature (RT, 22°C), or severe cold (SC, 8°C) and BAT was analyzed for DNA methylation and histone modifications. Methylation of promoters and intragenic regions in genomic DNA decrease in response to chronic cold exposure. Integration of DNA methylation and RNA expression datasets suggest a role for epigenetic modification of DNA in regulation of gene expression in response to cold. In response to cold housing, we observe increased bulk acetylation of histones H3.2 and H4, increased histone H3.2 proteoforms with di- and trimethylation of lysine 9 (K9me2 and K9me3), and increased histone H4 proteoforms with acetylation of lysine 16 (K16ac) in BAT. CONCLUSIONS Our results reveal global epigenetically-regulated transcriptional "on" and "off" signals in murine BAT in response to varying degrees of chronic cold stimuli and establish a novel methodology to quantitatively study histones in BAT, allowing for direct comparisons to decipher mechanistic changes during the thermogenic response. Additionally, we make histone PTM and proteoform quantitation, RNA splicing, RRBS, and transcriptional footprint datasets available as a resource for future research.
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Affiliation(s)
- Bethany C Taylor
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX, USA
| | - Loic H Steinthal
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Division of Nutrition, Baylor College of Medicine, Houston, TX, USA
| | - Michelle Dias
- Department of Pediatrics, Division of Neurology, Baylor College of Medicine, Houston, TX, USA
| | - Hari Krishna Yalamanchili
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Division of Nutrition, Baylor College of Medicine, Houston, TX, USA
- Department of Pediatrics, Division of Neurology, Baylor College of Medicine, Houston, TX, USA
- Jan and Dan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Scott A Ochsner
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Gladys E Zapata
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Division of Nutrition, Baylor College of Medicine, Houston, TX, USA
| | - Nitesh R Mehta
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Division of Nutrition, Baylor College of Medicine, Houston, TX, USA
| | - Neil J McKenna
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Nicolas L Young
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
- Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX, USA.
| | - Alli M Nuotio-Antar
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Division of Nutrition, Baylor College of Medicine, Houston, TX, USA.
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2
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Taylor BC, Steinthal LH, Dias M, Yalamanchili HK, Ochsner SA, Zapata GE, Mehta NR, McKenna NJ, Young NL, Nuotio-Antar AM. Histone proteoform analysis reveals epigenetic changes in adult mouse brown adipose tissue in response to cold stress. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.07.30.551059. [PMID: 38328142 PMCID: PMC10849524 DOI: 10.1101/2023.07.30.551059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Regulation of the thermogenic response by brown adipose tissue (BAT) is an important component of energy homeostasis with implications for the treatment of obesity and diabetes. Our preliminary analyses uncovered many nodes representing epigenetic modifiers that are altered in BAT in response to chronic thermogenic activation. Thus, we hypothesized that chronic thermogenic activation broadly alters epigenetic modifications of DNA and histones in BAT. Motivated to understand how BAT function is regulated epigenetically, we developed a novel method for the first-ever unbiased top-down proteomic quantitation of histone modifications in BAT and validated our results with a multi-omic approach. To test our hypothesis, wildtype male C57BL/6J mice were housed under chronic conditions of thermoneutral temperature (TN, 28.8°C), mild cold/room temperature (RT, 22°C), or severe cold (SC, 8°C) and BAT was analyzed for DNA methylation and histone modifications. Methylation of promoters and intragenic regions in genomic DNA decrease in response to chronic cold exposure. Integration of DNA methylation and RNA expression data suggest a role for epigenetic modification of DNA in gene regulation in response to cold. In response to cold housing, we observe increased bulk acetylation of histones H3.2 and H4, increased histone H3.2 proteoforms with di- and trimethylation of lysine 9 (K9me2 and K9me3), and increased histone H4 proteoforms with acetylation of lysine 16 (K16ac) in BAT. Taken together, our results reveal global epigenetically-regulated transcriptional "on" and "off" signals in murine BAT in response to varying degrees of chronic cold stimuli and establish a novel methodology to quantitatively study histones in BAT, allowing for direct comparisons to decipher mechanistic changes during the thermogenic response. Additionally, we make histone PTM and proteoform quantitation, RNA splicing, RRBS, and transcriptional footprint datasets available as a resource for future research.
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Affiliation(s)
- Bethany C. Taylor
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX
| | - Loic H. Steinthal
- Children’s Nutrition Research Center, Baylor College of Medicine, Houston, TX
| | - Michelle Dias
- Jan and Dan Duncan Neurological Research Institute, Baylor College of Medicine, Houston, TX
| | - Hari K. Yalamanchili
- Children’s Nutrition Research Center, Baylor College of Medicine, Houston, TX
- Jan and Dan Duncan Neurological Research Institute, Baylor College of Medicine, Houston, TX
| | - Scott A. Ochsner
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Gladys E. Zapata
- Children’s Nutrition Research Center, Baylor College of Medicine, Houston, TX
| | - Nitesh R. Mehta
- Children’s Nutrition Research Center, Baylor College of Medicine, Houston, TX
| | - Neil J. McKenna
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Nicolas L. Young
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
- Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX
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3
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Bugyi F, Turiák L, Drahos L, Tóth G. Optimization of reversed-phase solid-phase extraction for shotgun proteomics analysis. JOURNAL OF MASS SPECTROMETRY : JMS 2023; 58:e4965. [PMID: 37464559 DOI: 10.1002/jms.4965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 06/24/2023] [Accepted: 06/28/2023] [Indexed: 07/20/2023]
Abstract
Reversed-phase solid-phase extraction (SPE) is the method of choice for the purification of proteomics samples. Even though the efficacy of SPE methods is sample type-dependent, the manufacturers' protocols are used in most studies. Using an optimized SPE method can lead to a substantial gain in identification and recovery. In this tutorial, we give a brief introduction to the most important parameters influencing SPE performance, and we present a short workflow (16 measurements) for optimizing the SPE procedure. This is complemented by method performance assessment instructions and a short troubleshooting guide to help users further understand and investigate their SPE methods.
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Affiliation(s)
- Fanni Bugyi
- MS Proteomics Research Group, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/a, Budapest, 1117, Hungary
| | - Lilla Turiák
- MS Proteomics Research Group, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
| | - László Drahos
- MS Proteomics Research Group, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
| | - Gábor Tóth
- MS Proteomics Research Group, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
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4
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De Clerck L, Willems S, Daled S, Van Puyvelde B, Verhelst S, Corveleyn L, Deforce D, Dhaenens M. An experimental design to extract more information from MS-based histone studies. Mol Omics 2021; 17:929-938. [PMID: 34522942 DOI: 10.1039/d1mo00201e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Histone-based chromatin organization paved the way for eukaryotic genome complexity. Because of their key role in information management, the histone posttranslational modifications (hPTM), which mediate their function, have evolved into an alphabet that has more letters than there are amino acids, together making up the "histone code". The resulting combinatorial complexity is manifold higher than what is usually encountered in proteomics. Consequently, a considerably bigger part of the acquired MSMS spectra remains unannotated to date. Adapted search parameters can dig deeper into the dark histone ion space, but the lack of false discovery rate (FDR) control and the high level of ambiguity when searching combinatorial PTMs makes it very hard to assess whether the newly assigned ions are informative. Therefore, we propose an easily adoptable time-lapse enzymatic deacetylation (HDAC1) of a commercial histone extract as a quantify-first strategy that allows isolating ion populations of interest, when studying e.g. acetylation on histones, that currently remain in the dark. By adapting search parameters to study potential issues in sample preparation, data acquisition and data analysis, we stepwise managed to double the portion of annotated precursors of interest from 10.5% to 21.6%. This strategy is intended to make up for the lack of validated FDR control and has led to several adaptations of our current workflow that will reduce the portion of the dark histone ion space in the future. Finally, this strategy can be applied with any enzyme targeting a modification of interest.
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Affiliation(s)
- Laura De Clerck
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Sander Willems
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Simon Daled
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Bart Van Puyvelde
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Sigrid Verhelst
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Laura Corveleyn
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Dieter Deforce
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Maarten Dhaenens
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
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5
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Mechanistic insights into KDM4A driven genomic instability. Biochem Soc Trans 2021; 49:93-105. [PMID: 33492339 PMCID: PMC7925003 DOI: 10.1042/bst20191219] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 12/19/2022]
Abstract
Alterations in global epigenetic signatures on chromatin are well established to contribute to tumor initiation and progression. Chromatin methylation status modulates several key cellular processes that maintain the integrity of the genome. KDM4A, a demethylase that belongs to the Fe-II dependent dioxygenase family that uses α-ketoglutarate and molecular oxygen as cofactors, is overexpressed in several cancers and is associated with an overall poor prognosis. KDM4A demethylates lysine 9 (H3K9me2/3) and lysine 36 (H3K36me3) methyl marks on histone H3. Given the complexity that exists with these marks on chromatin and their effects on transcription and proliferation, it naturally follows that demethylation serves an equally important role in these cellular processes. In this review, we highlight the role of KDM4A in transcriptional modulation, either dependent or independent of its enzymatic activity, arising from the amplification of this demethylase in cancer. KDM4A modulates re-replication of distinct genomic loci, activates cell cycle inducers, and represses proteins involved in checkpoint control giving rise to proliferative damage, mitotic disturbances and chromosomal breaks, ultimately resulting in genomic instability. In parallel, emerging evidence of non-nuclear substrates of epigenetic modulators emphasize the need to investigate the role of KDM4A in regulating non-nuclear substrates and evaluate their contribution to genomic instability in this context. The existence of promising KDM-specific inhibitors makes these demethylases an attractive target for therapeutic intervention in cancers.
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6
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Aslebagh R, Wormwood KL, Channaveerappa D, Wetie AGN, Woods AG, Darie CC. Identification of Posttranslational Modifications (PTMs) of Proteins by Mass Spectrometry. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1140:199-224. [DOI: 10.1007/978-3-030-15950-4_11] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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7
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Ngounou Wetie AG, Sokolowska I, Channaveerappa D, Dupree EJ, Jayathirtha M, Woods AG, Darie CC. Proteomics and Non-proteomics Approaches to Study Stable and Transient Protein-Protein Interactions. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1140:121-142. [DOI: 10.1007/978-3-030-15950-4_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Zhang C, Liu Y. Retrieving Quantitative Information of Histone PTMs by Mass Spectrometry. Methods Enzymol 2016; 586:165-191. [PMID: 28137562 DOI: 10.1016/bs.mie.2016.10.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Posttranslational modifications (PTMs) of histones are one of the main research interests in the rapidly growing field of epigenetics. Accurate and precise quantification of these highly complex histone PTMs is critical for understanding the histone code and the biological significance behind it. It nonetheless remains a major analytical challenge. Mass spectrometry (MS) has been proven as a robust tool in retrieving quantitative information of histone PTMs, and a variety of MS-based quantitative strategies have been successfully developed and employed in basic research as well as clinical studies. In this chapter, we provide an overview for quantitative analysis of histone PTMs, often highly flexible and case dependent, as a primer for future experimental designs.
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Affiliation(s)
- C Zhang
- Baylor College of Medicine, Houston, TX, United States.
| | - Y Liu
- University of Michigan, Ann Arbor, MI, United States.
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9
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Minshull TC, Cole J, Dockrell DH, Read RC, Dickman MJ. Analysis of histone post translational modifications in primary monocyte derived macrophages using reverse phase×reverse phase chromatography in conjunction with porous graphitic carbon stationary phase. J Chromatogr A 2016; 1453:43-53. [PMID: 27260198 PMCID: PMC4906248 DOI: 10.1016/j.chroma.2016.05.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 04/12/2016] [Accepted: 05/03/2016] [Indexed: 02/07/2023]
Abstract
A two dimensional-liquid chromatography (2D-LC) based approach was developed for the identification and quantification of histone post translational modifications in conjunction with mass spectrometry analysis. Using a bottom-up strategy, offline 2D-LC was developed using reverse phase chromatography. A porous graphitic carbon stationary phase in the first dimension and a C18 stationary phase in the second dimension interfaced with mass spectrometry was used to analyse global levels of histone post translational modifications in human primary monocyte-derived macrophages. The results demonstrated that 84 different histone peptide proteoforms, with modifications at 18 different sites including combinatorial marks were identified, representing an increase in the identification of histone peptides by 65% and 51% compared to two different 1D-LC approaches on the same mass spectrometer. The use of the porous graphitic stationary phase in the first dimension resulted in efficient separation of histone peptides across the gradient, with good resolution and is orthogonal to the online C18 reverse phase chromatography. Overall, more histone peptides were identified using the 2D-LC approach compared to conventional 1D-LC approaches. In addition, a bioinformatic pipeline was developed in-house to enable the high throughput efficient and accurate quantification of fractionated histone peptides. The automation of a section of the downstream analysis pipeline increased the throughput of the 2D-LC-MS/MS approach for the quantification of histone post translational modifications.
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Affiliation(s)
- Thomas C Minshull
- Department of Chemical and Biological Engineering, ChELSI Institute, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom; Department of Infection, Immunity & Cardiovascular Disease, University of Sheffield Medical School, United Kingdom; Sheffield Teaching Hospitals, United Kingdom
| | - Joby Cole
- Department of Chemical and Biological Engineering, ChELSI Institute, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom; Department of Infection, Immunity & Cardiovascular Disease, University of Sheffield Medical School, United Kingdom; Sheffield Teaching Hospitals, United Kingdom
| | - David H Dockrell
- Department of Infection, Immunity & Cardiovascular Disease, University of Sheffield Medical School, United Kingdom; Sheffield Teaching Hospitals, United Kingdom
| | - Robert C Read
- Academic Unit of Clinical and Experimental Sciences, Faculty of Medicine and Institute for Life Sciences, University of Southampton, NIHR Respiratory Biomedical Research Unit, University Hospital Southampton, Southampton SO166YD, United Kingdom
| | - Mark J Dickman
- Department of Chemical and Biological Engineering, ChELSI Institute, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom.
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10
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Abstract
Histone posttranslational modifications represent a versatile set of epigenetic marks involved not only in dynamic cellular processes, such as transcription and DNA repair, but also in the stable maintenance of repressive chromatin. In this article, we review many of the key and newly identified histone modifications known to be deregulated in cancer and how this impacts function. The latter part of the article addresses the challenges and current status of the epigenetic drug development process as it applies to cancer therapeutics.
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Affiliation(s)
- James E Audia
- Constellation Pharmaceuticals, Cambridge, Massachusetts 02142
| | - Robert M Campbell
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285
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11
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Noberini R, Sigismondo G, Bonaldi T. The contribution of mass spectrometry-based proteomics to understanding epigenetics. Epigenomics 2016; 8:429-45. [DOI: 10.2217/epi.15.108] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Chromatin is a macromolecular complex composed of DNA and histones that regulate gene expression and nuclear architecture. The concerted action of DNA methylation, histone post-translational modifications and chromatin-associated proteins control the epigenetic regulation of the genome, ultimately determining cell fate and the transcriptional outputs of differentiated cells. Deregulation of this complex machinery leads to disease states, and exploiting epigenetic drugs is becoming increasingly attractive for therapeutic intervention. Mass spectrometry (MS)-based proteomics emerged as a powerful tool complementary to genomic approaches for epigenetic research, allowing the unbiased and comprehensive analysis of histone post-translational modifications and the characterization of chromatin constituents and chromatin-associated proteins. Furthermore, MS holds great promise for epigenetic biomarker discovery and represents a useful tool for deconvolution of epigenetic drug targets. Here, we will provide an overview of the applications of MS-based proteomics in various areas of chromatin biology.
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Affiliation(s)
- Roberta Noberini
- Center for Genomic Science of IIT@SEMM, Istituto Italiano di Tecnologia, via Adamello 16, Milano, Italy
| | - Gianluca Sigismondo
- Department of Experimental Oncology, European Institute of Oncology, via Adamello 16, Milano, Italy
| | - Tiziana Bonaldi
- Department of Experimental Oncology, European Institute of Oncology, via Adamello 16, Milano, Italy
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12
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Sweredoski MJ, Moradian A, Raedle M, Franco C, Hess S. High Resolution Parallel Reaction Monitoring with Electron Transfer Dissociation for Middle-Down Proteomics. Anal Chem 2015; 87:8360-6. [DOI: 10.1021/acs.analchem.5b01542] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Michael J. Sweredoski
- Proteome
Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
| | - Annie Moradian
- Proteome
Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
| | - Matthias Raedle
- Proteome
Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
- Hochschule Weihenstephan-Triesdorf, University of Applied Sciences, Faculty of Biotechnology and Bioinformatic, Am Hofgarten 4, 85354 Freising, Germany
| | - Catarina Franco
- Proteome
Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
- Instituto
de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Sonja Hess
- Proteome
Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
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13
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Feller C, Forné I, Imhof A, Becker PB. Global and specific responses of the histone acetylome to systematic perturbation. Mol Cell 2015; 57:559-71. [PMID: 25578876 DOI: 10.1016/j.molcel.2014.12.008] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/24/2014] [Accepted: 11/25/2014] [Indexed: 01/12/2023]
Abstract
Regulation of histone acetylation is fundamental to the utilization of eukaryotic genomes in chromatin. Aberrant acetylation contributes to disease and can be clinically combated by inhibiting the responsible enzymes. Our knowledge of the histone acetylation system is patchy because we so far lacked the methodology to describe acetylation patterns and their genesis by integrated enzyme activities. We devised a generally applicable, mass spectrometry-based strategy to precisely and accurately quantify combinatorial modification motifs. This was applied to generate a comprehensive inventory of acetylation motifs on histones H3 and H4 in Drosophila cells. Systematic depletion of known or suspected acetyltransferases and deacetylases revealed specific alterations of histone acetylation signatures, established enzyme-substrate relationships, and unveiled an extensive crosstalk between neighboring modifications. Unexpectedly, overall histone acetylation levels remained remarkably constant upon depletion of individual acetyltransferases. Conceivably, the acetylation level is adjusted to maintain the global charge neutralization of chromatin and the stability of nuclei.
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Affiliation(s)
- Christian Feller
- Adolf-Butenandt-Institute and Center for Integrated Protein Science Munich, Ludwig-Maximilians-University, Munich, Germany
| | - Ignasi Forné
- Adolf-Butenandt-Institute and Center for Integrated Protein Science Munich, Ludwig-Maximilians-University, Munich, Germany
| | - Axel Imhof
- Adolf-Butenandt-Institute and Center for Integrated Protein Science Munich, Ludwig-Maximilians-University, Munich, Germany
| | - Peter B Becker
- Adolf-Butenandt-Institute and Center for Integrated Protein Science Munich, Ludwig-Maximilians-University, Munich, Germany.
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14
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Mass Spectrometric Analysis of Post-translational Modifications (PTMs) and Protein–Protein Interactions (PPIs). ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 806:205-35. [DOI: 10.1007/978-3-319-06068-2_9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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15
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Karch KR, Denizio JE, Black BE, Garcia BA. Identification and interrogation of combinatorial histone modifications. Front Genet 2013; 4:264. [PMID: 24391660 PMCID: PMC3868920 DOI: 10.3389/fgene.2013.00264] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 11/15/2013] [Indexed: 11/13/2022] Open
Abstract
Histone proteins are dynamically modified to mediate a variety of cellular processes including gene transcription, DNA damage repair, and apoptosis. Regulation of these processes occurs through the recruitment of non-histone proteins to chromatin by specific combinations of histone post-translational modifications (PTMs). Mass spectrometry has emerged as an essential tool to discover and quantify histone PTMs both within and between samples in an unbiased manner. Developments in mass spectrometry that allow for characterization of large histone peptides or intact protein has made it possible to determine which modifications occur simultaneously on a single histone polypeptide. A variety of techniques from biochemistry, biophysics, and chemical biology have been employed to determine the biological relevance of discovered combinatorial codes. This review first describes advancements in the field of mass spectrometry that have facilitated histone PTM analysis and then covers notable approaches to probe the biological relevance of these modifications in their nucleosomal context.
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Affiliation(s)
- Kelly R Karch
- Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania Philadelphia, PA, USA
| | - Jamie E Denizio
- Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania Philadelphia, PA, USA
| | - Ben E Black
- Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania Philadelphia, PA, USA
| | - Benjamin A Garcia
- Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania Philadelphia, PA, USA
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16
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Zhang C, Liu Y, Andrews PC. Quantification of histone modifications using ¹⁵N metabolic labeling. Methods 2013; 61:236-43. [PMID: 23454290 DOI: 10.1016/j.ymeth.2013.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 02/11/2013] [Accepted: 02/13/2013] [Indexed: 11/27/2022] Open
Abstract
Mass spectrometry has made major contributions to recent discoveries in the field of epigenetics, particularly in the characterization of the myriad post-translational modifications (PTMs) of histones which are technically challenging to analyze. These new developments have further aroused great interest in development of robust, new mass spectrometric methods to quantitatively study the dynamics of histone modifications. This review covers quantitative analysis of histone PTMs and discuss an ¹⁵N metabolic labeling procedure for quantifying histone PTMs applied to the analysis of methyltransferase knockouts in the model organism, Tetrahymena thermophila.
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Affiliation(s)
- Chunchao Zhang
- Department of Computational Medicine and Bioinformatics, University of Michigan, USA
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17
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Afjehi-Sadat L, Garcia BA. Comprehending dynamic protein methylation with mass spectrometry. Curr Opin Chem Biol 2013; 17:12-9. [PMID: 23333572 DOI: 10.1016/j.cbpa.2012.12.023] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 12/23/2012] [Accepted: 12/30/2012] [Indexed: 01/08/2023]
Abstract
Protein methylation is a post-translational modification (PTM) which modulates cellular and biological processes including transcription, RNA processing, protein interactions and protein dynamics. Methylation, catalyzed by highly specific methyltransferase enzymes, occurs on several amino acids including arginine, lysine, histidine and dicarboxylic amino acids like glutamate. Mass spectrometry (MS)-based techniques continue to be the methods of choice for the study of protein PTMs. These approaches are powerful and sensitive tools that have been used to identify, quantify and characterize protein methylation. In addition, metabolic labeling strategies can be coupled to MS detection in order to measure dynamic and differential in vivo protein methylation rates. In this review, different applications of mass spectrometry technologies and methods to study protein methylation are discussed.
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Affiliation(s)
- Leila Afjehi-Sadat
- Epigenetics Program, Perelman School of Medicine, University of Pennsylvania, 1009C Stellar-Chance Laboratories, 422 Curie Boulevard, Philadelphia, PA 19104, USA
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18
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Wetie AGN, Sokolowska I, Woods AG, Darie CC. Identification of Post-Translational Modifications by Mass Spectrometry. Aust J Chem 2013. [DOI: 10.1071/ch13144] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Proteins are the effector molecules of many cellular and biological processes and are thus very dynamic and flexible. Regulation of protein activity, structure, stability, and turnover is in part controlled by their post-translational modifications (PTMs). Common PTMs of proteins include phosphorylation, glycosylation, methylation, ubiquitination, acetylation, and oxidation. Understanding the biology of protein PTMs can help elucidate the mechanisms of many pathological conditions and provide opportunities for prevention, diagnostics, and treatment of these disorders. Prior to the era of proteomics, it was standard to use chemistry methods for the identification of protein modifications. With advancements in proteomic technologies, mass spectrometry has become the method of choice for the analysis of protein PTMs. In this brief review, we will highlight the biochemistry of PTMs with an emphasis on mass spectrometry.
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19
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Zhang C, Molascon AJ, Gao S, Liu Y, Andrews PC. Quantitative proteomics reveals that the specific methyltransferases Txr1p and Ezl2p differentially affect the mono-, di- and trimethylation states of histone H3 lysine 27 (H3K27). Mol Cell Proteomics 2012; 12:1678-88. [PMID: 23150054 DOI: 10.1074/mcp.m112.021733] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Nuclear DNA in eukaryotic cells is assembled into the hierarchical chromatin structure via a process that is dynamically affected by the combinatorial set of post-translational modifications (PTMs) of histones in a dynamic manner responsive to physiological and environmental changes. The precise quantification of these complex modifications is challenging. Here we present a robust MS-based quantitative proteomics method for studying histone PTMs using (15)N metabolically labeled histones as the internal reference. Using this approach, we identified Tetrahymena trithorax related 1 (Txr1p) as a histone methyltransferase in Tetrahymena thermophila and characterized the relationships of the Txr1p and Ezl2p methyltransferases to histone H3 modification. We identified 32 PTMs in more than 60 tryptic peptides from histone H3 of the ciliate model organism Tetrahymena thermophila, and we quantified them (average coefficient of variation: 13%). We examined perturbations to histone modification patterns in two knockout strains of SET-domain-containing histone methyltransferases (HMT). Knockout of TXR1 led to progressively decreased mono-, di-, and tri-methylation of H3K27 and apparent reduced monomethylation of H3K36 in vivo. In contrast, EZL2 knockout resulted in dramatic reductions in both di- and tri-methylation of H3K27 in vivo, whereas the levels of monomethylation of H3K27 increased significantly. This buildup of monomethyl H3K27 is consistent with its role as a substrate for Ezl2p. These results were validated via immunoblotting using modification site-specific antibodies. Taken together, our studies define Txr1p as an H3K27 monomethylation-specific HMT that facilitates the buildup of H3K27 di- and trimethylation by the canonical H3K27-specific HMT, Ezl2p. Our studies also delineate some of the interdependences between various H3 modifications, as compensatory increases in monomethylation at H3K4, H3K23, and H3K56 were also observed for both TXR1 and ELZ2 mutants.
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Affiliation(s)
- Chunchao Zhang
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA
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20
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Contrepois K, Thuret JY, Courbeyrette R, Fenaille F, Mann C. Deacetylation of H4-K16Ac and heterochromatin assembly in senescence. Epigenetics Chromatin 2012; 5:15. [PMID: 22932127 PMCID: PMC3487866 DOI: 10.1186/1756-8935-5-15] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 08/02/2012] [Indexed: 01/20/2023] Open
Abstract
Background Cellular senescence is a stress response of mammalian cells leading to a durable arrest of cell proliferation that has been implicated in tumor suppression, wound healing, and aging. The proliferative arrest is mediated by transcriptional repression of genes essential for cell division by the retinoblastoma protein family. This repression is accompanied by varying degrees of heterochromatin assembly, but little is known regarding the molecular mechanisms involved. Results We found that both deacetylation of H4-K16Ac and expression of HMGA1/2 can contribute to DNA compaction during senescence. SIRT2, an NAD-dependent class III histone deacetylase, contributes to H4-K16Ac deacetylation and DNA compaction in human fibroblast cell lines that assemble striking senescence-associated heterochromatin foci (SAHFs). Decreased H4-K16Ac was observed in both replicative and oncogene-induced senescence of these cells. In contrast, this mechanism was inoperative in a fibroblast cell line that did not assemble extensive heterochromatin during senescence. Treatment of senescent cells with trichostatin A, a class I/II histone deacetylase inhibitor, also induced rapid and reversible decondensation of SAHFs. Inhibition of DNA compaction did not significantly affect the stability of the senescent state. Conclusions Variable DNA compaction observed during senescence is explained in part by cell-type specific regulation of H4 deacetylation and HMGA1/2 expression. Deacetylation of H4-K16Ac during senescence may explain reported decreases in this mark during mammalian aging and in cancer cells.
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Affiliation(s)
- Kévin Contrepois
- CEA, iBiTecS, Service de Biologie Intégrative et de Génétique Moléculaire (SBIGeM), F-91191, Gif-sur-Yvette, France.
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21
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LeRoy G, Chepelev I, DiMaggio PA, Blanco MA, Zee BM, Zhao K, Garcia BA. Proteogenomic characterization and mapping of nucleosomes decoded by Brd and HP1 proteins. Genome Biol 2012; 13:R68. [PMID: 22897906 PMCID: PMC3491368 DOI: 10.1186/gb-2012-13-8-r68] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Accepted: 08/16/2012] [Indexed: 01/06/2023] Open
Abstract
Background Histone post-translational modifications (PTMs) constitute a branch of epigenetic mechanisms that can control the expression of eukaryotic genes in a heritable manner. Recent studies have identified several PTM-binding proteins containing diverse specialized domains whose recognition of specific PTM sites leads to gene activation or repression. Here, we present a high-throughput proteogenomic platform designed to characterize the nucleosomal make-up of chromatin enriched with a set of histone PTM binding proteins known as histone PTM readers. We support our findings with gene expression data correlating to PTM distribution. Results We isolated human mononucleosomes bound by the bromodomain-containing proteins Brd2, Brd3 and Brd4, and by the chromodomain-containing heterochromatin proteins HP1β and HP1α. Histone PTMs were quantified by mass spectrometry (ChIP-qMS), and their associated DNAs were mapped using deep sequencing. Our results reveal that Brd- and HP1-bound nucleosomes are enriched in histone PTMs consistent with actively transcribed euchromatin and silent heterochromatin, respectively. Data collected using RNA-Seq show that Brd-bound sites correlate with highly expressed genes. In particular, Brd3 and Brd4 are most enriched on nucleosomes located within HOX gene clusters, whose expression is reduced upon Brd4 depletion by short hairpin RNA. Conclusions Proteogenomic mapping of histone PTM readers, alongside the characterization of their local chromatin environments and transcriptional information, should prove useful for determining how histone PTMs are bound by these readers and how they contribute to distinct transcriptional states.
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Brunner AM, Tweedie-Cullen RY, Mansuy IM. Epigenetic modifications of the neuroproteome. Proteomics 2012; 12:2404-20. [PMID: 22696459 DOI: 10.1002/pmic.201100672] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Revised: 03/12/2012] [Accepted: 04/12/2012] [Indexed: 01/17/2023]
Abstract
In the central nervous system, epigenetic processes are involved in a multitude of brain functions ranging from the development and differentiation of the nervous system through to higher-order cognitive processes such as learning and memory. This review summarises the current state of the art for the proteomic analysis of the epigenetic regulation of gene expression, in particular the PTM of histones, in the brain and cellular model systems. It describes the MS technologies that have helped the identification and analysis of histones, histone variants and PTMs in the brain. Strategies for the isolation of histones that allow the qualitative analysis of PTMs and their combinatorial patterns are introduced, methods for the relative and absolute quantification of histone PTMs are described, and future challenges are discussed.
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Affiliation(s)
- Andrea M Brunner
- Brain Research Institute, University of Zürich and Department of Biology, ETH Zürich, Zürich, Switzerland
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23
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G9a/GLP histone lysine dimethyltransferase complex activity in the hippocampus and the entorhinal cortex is required for gene activation and silencing during memory consolidation. J Neurosci 2012; 32:5440-53. [PMID: 22514307 DOI: 10.1523/jneurosci.0147-12.2012] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Learning triggers alterations in gene transcription in brain regions such as the hippocampus and the entorhinal cortex (EC) that are necessary for long-term memory (LTM) formation. Here, we identify an essential role for the G9a/G9a-like protein (GLP) lysine dimethyltransferase complex and the histone H3 lysine 9 dimethylation (H3K9me2) marks it catalyzes, in the transcriptional regulation of genes in area CA1 of the rat hippocampus and the EC during memory consolidation. Contextual fear learning increased global levels of H3K9me2 in area CA1 and the EC, with observable changes at the Zif268, DNMT3a, BDNF exon IV, and cFOS gene promoters, which occurred in concert with mRNA expression. Inhibition of G9a/GLP in the EC, but not in the hippocampus, enhanced contextual fear conditioning relative to control animals. The inhibition of G9a/GLP in the EC induced several histone modifications that include not only methylation but also acetylation. Surprisingly, we found that downregulation of G9a/GLP activity in the EC enhanced H3K9me2 in area CA1, resulting in transcriptional silencing of the non-memory permissive gene COMT in the hippocampus. In addition, synaptic plasticity studies at two distinct EC-CA1 cellular pathways revealed that G9a/GLP activity is critical for hippocampus-dependent long-term potentiation initiated in the EC via the perforant pathway, but not the temporoammonic pathway. Together, these data demonstrate that G9a/GLP differentially regulates gene transcription in the hippocampus and the EC during memory consolidation. Furthermore, these findings support the possibility of a role for G9a/GLP in the regulation of cellular and molecular cross talk between these two brain regions during LTM formation.
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24
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Sidoli S, Cheng L, Jensen ON. Proteomics in chromatin biology and epigenetics: Elucidation of post-translational modifications of histone proteins by mass spectrometry. J Proteomics 2012; 75:3419-33. [PMID: 22234360 DOI: 10.1016/j.jprot.2011.12.029] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 12/18/2011] [Accepted: 12/20/2011] [Indexed: 12/11/2022]
Affiliation(s)
- Simone Sidoli
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
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25
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Britton LMP, Gonzales-Cope M, Zee BM, Garcia BA. Breaking the histone code with quantitative mass spectrometry. Expert Rev Proteomics 2012; 8:631-43. [PMID: 21999833 DOI: 10.1586/epr.11.47] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Histone post-translational modifications (PTMs) comprise one of the most intricate nuclear signaling networks that govern gene expression in a long-term and dynamic fashion. These PTMs are considered to be 'epigenetic' or heritable from one cell generation to the next and help establish genomic expression patterns. While much of the analyses of histones have historically been performed using site-specific antibodies, these methods are replete with technical obstacles (i.e., cross-reactivity and epitope occlusion). Mass spectrometry-based proteomics has begun to play a significant role in the interrogation of histone PTMs, revealing many new aspects of these modifications that cannot be easily determined with standard biological approaches. Here, we review the accomplishments of mass spectrometry in the histone field, and outline the future roadblocks that must be overcome for mass spectrometry-based proteomics to become the method of choice for chromatin biologists.
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Affiliation(s)
- Laura-Mae P Britton
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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26
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Crea F, Paolicchi E, Marquez VE, Danesi R. Polycomb genes and cancer: time for clinical application? Crit Rev Oncol Hematol 2011; 83:184-93. [PMID: 22112692 DOI: 10.1016/j.critrevonc.2011.10.007] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 10/12/2011] [Accepted: 10/26/2011] [Indexed: 12/12/2022] Open
Abstract
Polycomb group genes (PcGs) are epigenetic effectors, essential for stem cell self-renewal and pluripotency. Two main Polycomb repressive complexes (PRC1, PRC2) mediate gene silencing through histone post-translational modifications. PcGs have been the focus of investigation in cancer research. Many cancer types show an over-expression of PcGs, predicting poor prognosis, metastasis and chemoresistance. Genetic polymorphisms of EZH2 (a PRC2 component) are significantly associated to lung cancer risk. Recently, 3-Deazaneplanocin A (DZNeP) was identified as an efficient inhibitor of PRC2 activity. DZNeP impairs cancer stem cell self-renewal and tumorigenicity. Despite the well-established role of PcGs in cancer stem cell biology, few studies dissected the clinical significance of these genes. In this paper, we explore PcGs as predictive and prognostic factors in oncology, with particular emphasis on what they can add to current biomarkers. We also propose a model for the rational development of DZNeP-based anticancer regimens and suggest the therapeutic applications of this drug.
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Affiliation(s)
- Francesco Crea
- Department of Internal Medicine, Division of Pharmacology, University of Pisa, Via Roma 55, 56100 Pisa, Italy.
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27
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Arnaudo AM, Molden RC, Garcia BA. Revealing histone variant induced changes via quantitative proteomics. Crit Rev Biochem Mol Biol 2011; 46:284-94. [PMID: 21526979 DOI: 10.3109/10409238.2011.577052] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Histone variants are isoforms of linker and core histone proteins that differ in their amino acid sequences. These variants have distinct genomic locations and posttranslational modifications, thus increasing the complexity of the chromatin architecture. Biological studies of histone variants indicate that they play a role in many processes including transcription, DNA damage response, and the cell cycle. The small differences in amino acid sequence and the diverse posttranslational modification states that exist between histone variants make traditional analysis using immunoassay methods challenging. In recent years, a number of mass spectrometric techniques have been developed to identify and quantify histones at the whole protein or peptide levels. In this review, we discuss the biology of histone variants and methods to characterize them using mass spectrometry-based proteomics.
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Affiliation(s)
- Anna M Arnaudo
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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28
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Zee BM, Young NL, Garcia BA. Quantitative proteomic approaches to studying histone modifications. CURRENT CHEMICAL GENOMICS 2011; 5:106-14. [PMID: 21966350 PMCID: PMC3178935 DOI: 10.2174/1875397301005010106] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2010] [Revised: 03/26/2011] [Accepted: 04/25/2011] [Indexed: 11/22/2022]
Abstract
Histone post-translational modifications (PTMs) positively and negatively regulate gene expression, and are consequently a vital influence on the genomic profile of all eukaryotic species. The study of histone PTMs using classical methods in molecular biology, such as immunofluorescence and Western blotting, is challenging given the technical issues of the approaches, and chemical diversity and combinatorial patterns of the modifications. In light of these many technical limitations, mass spectrometry (MS) is emerging as the most unbiased and rigorous experimental platform to identify and quantify histone PTMs in a high-throughput manner. This review covers the latest developments in mass spectrometry for the analysis of histone PTMs, with the hope of inspiring the continued integration of proteomic, genomic and epigenetic research.
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Affiliation(s)
- Barry M Zee
- 415 Schultz Laboratory, Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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29
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Vedadi M, Barsyte-Lovejoy D, Liu F, Rival-Gervier S, Allali-Hassani A, Labrie V, Wigle TJ, Dimaggio PA, Wasney GA, Siarheyeva A, Dong A, Tempel W, Wang SC, Chen X, Chau I, Mangano TJ, Huang XP, Simpson CD, Pattenden SG, Norris JL, Kireev DB, Tripathy A, Edwards A, Roth BL, Janzen WP, Garcia BA, Petronis A, Ellis J, Brown PJ, Frye SV, Arrowsmith CH, Jin J. A chemical probe selectively inhibits G9a and GLP methyltransferase activity in cells. Nat Chem Biol 2011; 7:566-74. [PMID: 21743462 PMCID: PMC3184254 DOI: 10.1038/nchembio.599] [Citation(s) in RCA: 400] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Accepted: 04/27/2011] [Indexed: 12/12/2022]
Abstract
Protein lysine methyltransferases G9a and GLP modulate the transcriptional repression of a variety of genes via dimethylation of Lys9 on histone H3 (H3K9me2) as well as dimethylation of non-histone targets. Here we report the discovery of UNC0638, an inhibitor of G9a and GLP with excellent potency and selectivity over a wide range of epigenetic and non-epigenetic targets. UNC0638 treatment of a variety of cell lines resulted in lower global H3K9me2 levels, equivalent to levels observed for small hairpin RNA knockdown of G9a and GLP with the functional potency of UNC0638 being well separated from its toxicity. UNC0638 markedly reduced the clonogenicity of MCF7 cells, reduced the abundance of H3K9me2 marks at promoters of known G9a-regulated endogenous genes and disproportionately affected several genomic loci encoding microRNAs. In mouse embryonic stem cells, UNC0638 reactivated G9a-silenced genes and a retroviral reporter gene in a concentration-dependent manner without promoting differentiation.
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Affiliation(s)
- Masoud Vedadi
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | | | - Feng Liu
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Sylvie Rival-Gervier
- Developmental and Stem Cell Biology Program, SickKids Hospital, Toronto, Ontario, Canada
- INRa, UMR 1198 Biologie du Développement et Reproduction, Jouy en Josas, France
| | | | - Viviane Labrie
- Krembil Family Epigenetic Laboratory, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Tim J Wigle
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Peter A Dimaggio
- Department of Chemistry, Princeton University, Princeton, New Jersey, USA
| | - Gregory A Wasney
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Alena Siarheyeva
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Aiping Dong
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Wolfram Tempel
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Sun-Chong Wang
- Krembil Family Epigenetic Laboratory, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Institute of Systems Biology and Bioinformatics, National Central University, Jhongli City, Taiwan
| | - Xin Chen
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Irene Chau
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Thomas J Mangano
- National Institute of Mental Health Psychoactive Drug Screening Program, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Xi-ping Huang
- National Institute of Mental Health Psychoactive Drug Screening Program, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Catherine D Simpson
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Samantha G Pattenden
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Jacqueline L Norris
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Dmitri B Kireev
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Ashutosh Tripathy
- Department of Biochemistry and Biophysics, UNC Macromolecular Interactions Facility, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Aled Edwards
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Bryan L Roth
- National Institute of Mental Health Psychoactive Drug Screening Program, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - William P Janzen
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Benjamin A Garcia
- Department of Chemistry, Princeton University, Princeton, New Jersey, USA
| | - Arturas Petronis
- Krembil Family Epigenetic Laboratory, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - James Ellis
- Developmental and Stem Cell Biology Program, SickKids Hospital, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Peter J Brown
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
| | - Stephen V Frye
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Cheryl H Arrowsmith
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada
- Ontario Cancer Institute, Campbell Family Cancer Research Institute and Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Jian Jin
- Center for Integrative Chemical Biology and Drug Discovery, Division of Medicinal Chemistry and Natural Products, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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30
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Abstract
The DNA in our bodies is wrapped around octamers of histone proteins to form nucleosomes. This structural organization facilitates packaging of the entire genome into a single nucleus but is also a platform for post-translational modifications which have functional roles within the cell. Over the last few years, modifications of histone residues have been identified and potential roles of individual modifications in processes such as DNA repair, replication and gene transcription have been uncovered. However, we know much less about the combinatorial action of the individual marks and how one modification impacts on the function of another. Recent developments in quantitative proteomics methodology and increasing amounts of genomic data generated using high-throughput techniques are allowing insights into how multiple modifications are interpreted by the cell.
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Affiliation(s)
- Ian C Wood
- Institute of Membrane & Systems Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
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