1
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Prescott NA, Mansisidor A, Bram Y, Biaco T, Rendleman J, Faulkner SC, Lemmon AA, Lim C, Hamard PJ, Koche RP, Risca VI, Schwartz RE, David Y. A nucleosome switch primes Hepatitis B Virus infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.03.03.531011. [PMID: 38915612 PMCID: PMC11195122 DOI: 10.1101/2023.03.03.531011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Chronic hepatitis B virus (HBV) infection is an incurable global health threat responsible for causing liver disease and hepatocellular carcinoma. During the genesis of infection, HBV establishes an independent minichromosome consisting of the viral covalently closed circular DNA (cccDNA) genome and host histones. The viral X gene must be expressed immediately upon infection to induce degradation of the host silencing factor, Smc5/6. However, the relationship between cccDNA chromatinization and X gene transcription remains poorly understood. Establishing a reconstituted viral minichromosome platform, we found that nucleosome occupancy in cccDNA drives X transcription. We corroborated these findings in cells and further showed that the chromatin destabilizing molecule CBL137 inhibits X transcription and HBV infection in hepatocytes. Our results shed light on a long-standing paradox and represent a potential new therapeutic avenue for the treatment of chronic HBV infection.
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Affiliation(s)
- Nicholas A. Prescott
- Tri-Institutional PhD Program in Chemical Biology; New York, NY 10065, USA
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
| | - Andrés Mansisidor
- Laboratory of Genome Architecture and Dynamics, The Rockefeller University; New York, NY 10065, USA
- These authors contributed equally
| | - Yaron Bram
- Division of Gastroenterology & Hepatology, Department of Medicine, Weill Cornell Medicine; New York, NY 10065, USA
- These authors contributed equally
| | - Tracy Biaco
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
- Department of Pharmacology, Weill Cornell Medicine; New York, NY 10065, USA
- These authors contributed equally
| | - Justin Rendleman
- Laboratory of Genome Architecture and Dynamics, The Rockefeller University; New York, NY 10065, USA
| | - Sarah C. Faulkner
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
| | - Abigail A. Lemmon
- Tri-Institutional PhD Program in Chemical Biology; New York, NY 10065, USA
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
| | - Christine Lim
- Division of Gastroenterology & Hepatology, Department of Medicine, Weill Cornell Medicine; New York, NY 10065, USA
| | - Pierre-Jacques Hamard
- Epigenetics Research Innovation Lab, Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
| | - Richard P. Koche
- Epigenetics Research Innovation Lab, Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
| | - Viviana I. Risca
- Laboratory of Genome Architecture and Dynamics, The Rockefeller University; New York, NY 10065, USA
| | - Robert E. Schwartz
- Division of Gastroenterology & Hepatology, Department of Medicine, Weill Cornell Medicine; New York, NY 10065, USA
- Department of Physiology and Biophysics, Weill Cornell Medicine; New York, NY 10065, USA
| | - Yael David
- Tri-Institutional PhD Program in Chemical Biology; New York, NY 10065, USA
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center; New York, NY 10065, USA
- Department of Pharmacology, Weill Cornell Medicine; New York, NY 10065, USA
- Lead Contact
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2
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Nakadai T, Shimada M, Ito K, Cevher MA, Chu CS, Kumegawa K, Maruyama R, Malik S, Roeder RG. Two target gene activation pathways for orphan ERR nuclear receptors. Cell Res 2023; 33:165-183. [PMID: 36646760 PMCID: PMC9892517 DOI: 10.1038/s41422-022-00774-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 12/02/2022] [Indexed: 01/18/2023] Open
Abstract
Estrogen-related receptors (ERRα/β/γ) are orphan nuclear receptors that function in energy-demanding physiological processes, as well as in development and stem cell maintenance, but mechanisms underlying target gene activation by ERRs are largely unknown. Here, reconstituted biochemical assays that manifest ERR-dependent transcription have revealed two complementary mechanisms. On DNA templates, ERRs activate transcription with just the normal complement of general initiation factors through an interaction of the ERR DNA-binding domain with the p52 subunit of initiation factor TFIIH. On chromatin templates, activation by ERRs is dependent on AF2 domain interactions with the cell-specific coactivator PGC-1α, which in turn recruits the ubiquitous p300 and MED1/Mediator coactivators. This role of PGC-1α may also be fulfilled by other AF2-interacting coactivators like NCOA3, which is shown to recruit Mediator selectively to ERRβ and ERRγ. Importantly, combined genetic and RNA-seq analyses establish that both the TFIIH and the AF2 interaction-dependent pathways are essential for ERRβ/γ-selective gene expression and pluripotency maintenance in embryonic stem cells in which NCOA3 is a critical coactivator.
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Affiliation(s)
- Tomoyoshi Nakadai
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
- Project for Cancer Epigenomics, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Miho Shimada
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
- Department of Molecular Biology, Yokohama City University Graduate School of Medical Science, Yokohama, Japan
| | - Keiichi Ito
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
| | - Murat Alper Cevher
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
- Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey
| | - Chi-Shuen Chu
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
| | - Kohei Kumegawa
- Cancer Cell Diversity Project, NEXT-Ganken Program, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Reo Maruyama
- Project for Cancer Epigenomics, Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Sohail Malik
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA.
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3
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Leonen CJA, Shimada M, Weller CE, Nakadai T, Hsu PL, Tyson EL, Mishra A, Shelton PM, Sadilek M, Hawkins RD, Zheng N, Roeder RG, Chatterjee C. Sumoylation of the human histone H4 tail inhibits p300-mediated transcription by RNA polymerase II in cellular extracts. eLife 2021; 10:67952. [PMID: 34747692 PMCID: PMC8626089 DOI: 10.7554/elife.67952] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 11/06/2021] [Indexed: 01/22/2023] Open
Abstract
The post-translational modification of histones by the small ubiquitin-like modifier (SUMO) protein has been associated with gene regulation, centromeric localization, and double-strand break repair in eukaryotes. Although sumoylation of histone H4 was specifically associated with gene repression, this could not be proven due to the challenge of site-specifically sumoylating H4 in cells. Biochemical crosstalk between SUMO and other histone modifications, such as H4 acetylation and H3 methylation, that are associated with active genes also remains unclear. We addressed these challenges in mechanistic studies using an H4 chemically modified at Lys12 by SUMO-3 (H4K12su) and incorporated into mononucleosomes and chromatinized plasmids for functional studies. Mononucleosome-based assays revealed that H4K12su inhibits transcription-activating H4 tail acetylation by the histone acetyltransferase p300, as well as transcription-associated H3K4 methylation by the extended catalytic module of the Set1/COMPASS (complex of proteins associated with Set1) histone methyltransferase complex. Activator- and p300-dependent in vitro transcription assays with chromatinized plasmids revealed that H4K12su inhibits both H4 tail acetylation and RNA polymerase II-mediated transcription. Finally, cell-based assays with a SUMO-H4 fusion that mimics H4 tail sumoylation confirmed the negative crosstalk between histone sumoylation and acetylation/methylation. Thus, our studies establish the key role for histone sumoylation in gene silencing and its negative biochemical crosstalk with active transcription-associated marks in human cells.
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Affiliation(s)
| | - Miho Shimada
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York City, United States
| | - Caroline E Weller
- Department of Chemistry, University of Washington, Seattle, United States
| | - Tomoyoshi Nakadai
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York City, United States.,Project for Cancer Epigenomics, Cancer Institute of JFCR, Tokyo, Japan
| | - Peter L Hsu
- Department of Pharmacology, University of Washington, Seattle, United States.,Howard Hughes Medical Institute, University of Washington, Seattle, United States
| | - Elizabeth L Tyson
- Department of Chemistry, University of Washington, Seattle, United States
| | - Arpit Mishra
- Department of Genome Sciences, Department of Medicine, University of Washington, Seattle, United States
| | - Patrick Mm Shelton
- Department of Chemistry, University of Washington, Seattle, United States
| | - Martin Sadilek
- Department of Chemistry, University of Washington, Seattle, United States
| | - R David Hawkins
- Department of Genome Sciences, Department of Medicine, University of Washington, Seattle, United States
| | - Ning Zheng
- Department of Pharmacology, University of Washington, Seattle, United States.,Howard Hughes Medical Institute, University of Washington, Seattle, United States
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York City, United States
| | - Champak Chatterjee
- Department of Chemistry, University of Washington, Seattle, United States
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4
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Klonou A, Chlamydas S, Piperi C. Structure, Activity and Function of the MLL2 (KMT2B) Protein Lysine Methyltransferase. Life (Basel) 2021; 11:823. [PMID: 34440566 PMCID: PMC8401916 DOI: 10.3390/life11080823] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/08/2021] [Accepted: 08/10/2021] [Indexed: 12/31/2022] Open
Abstract
The Mixed Lineage Leukemia 2 (MLL2) protein, also known as KMT2B, belongs to the family of mammalian histone H3 lysine 4 (H3K4) methyltransferases. It is a large protein of 2715 amino acids, widely expressed in adult human tissues and a paralog of the MLL1 protein. MLL2 contains a characteristic C-terminal SET domain responsible for methyltransferase activity and forms a protein complex with WRAD (WDR5, RbBP5, ASH2L and DPY30), host cell factors 1/2 (HCF 1/2) and Menin. The MLL2 complex is responsible for H3K4 trimethylation (H3K4me3) on specific gene promoters and nearby cis-regulatory sites, regulating bivalent developmental genes as well as stem cell and germinal cell differentiation gene sets. Moreover, MLL2 plays a critical role in development and germ line deletions of Mll2 have been associated with early growth retardation, neural tube defects and apoptosis that leads to embryonic death. It has also been involved in the control of voluntary movement and the pathogenesis of early stage childhood dystonia. Additionally, tumor-promoting functions of MLL2 have been detected in several cancer types, including colorectal, hepatocellular, follicular cancer and gliomas. In this review, we discuss the main structural and functional aspects of the MLL2 methyltransferase with particular emphasis on transcriptional mechanisms, gene regulation and association with diseases.
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Affiliation(s)
- Alexia Klonou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; (A.K.); (S.C.)
| | - Sarantis Chlamydas
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; (A.K.); (S.C.)
- Research and Development Department, Active Motif, Inc., Carlsbad, CA 92008, USA
| | - Christina Piperi
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece; (A.K.); (S.C.)
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5
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Mashtalir N, Suzuki H, Farrell DP, Sankar A, Luo J, Filipovski M, D'Avino AR, St Pierre R, Valencia AM, Onikubo T, Roeder RG, Han Y, He Y, Ranish JA, DiMaio F, Walz T, Kadoch C. A Structural Model of the Endogenous Human BAF Complex Informs Disease Mechanisms. Cell 2020; 183:802-817.e24. [PMID: 33053319 PMCID: PMC7717177 DOI: 10.1016/j.cell.2020.09.051] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 07/15/2020] [Accepted: 09/08/2020] [Indexed: 02/06/2023]
Abstract
Mammalian SWI/SNF complexes are ATP-dependent chromatin remodeling complexes that regulate genomic architecture. Here, we present a structural model of the endogenously purified human canonical BAF complex bound to the nucleosome, generated using cryoelectron microscopy (cryo-EM), cross-linking mass spectrometry, and homology modeling. BAF complexes bilaterally engage the nucleosome H2A/H2B acidic patch regions through the SMARCB1 C-terminal α-helix and the SMARCA4/2 C-terminal SnAc/post-SnAc regions, with disease-associated mutations in either causing attenuated chromatin remodeling activities. Further, we define changes in BAF complex architecture upon nucleosome engagement and compare the structural model of endogenous BAF to those of related SWI/SNF-family complexes. Finally, we assign and experimentally interrogate cancer-associated hot-spot mutations localizing within the endogenous human BAF complex, identifying those that disrupt BAF subunit-subunit and subunit-nucleosome interfaces in the nucleosome-bound conformation. Taken together, this integrative structural approach provides important biophysical foundations for understanding the mechanisms of BAF complex function in normal and disease states.
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Affiliation(s)
- Nazar Mashtalir
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Hiroshi Suzuki
- Laboratory of Molecular Electron Microscopy, The Rockefeller University, New York, NY, USA
| | - Daniel P Farrell
- Department of Biochemistry, University of Washington, Seattle, WA, USA
| | - Akshay Sankar
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Jie Luo
- Institute for Systems Biology, Seattle, WA, USA
| | - Martin Filipovski
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Andrew R D'Avino
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Roodolph St Pierre
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Chemical Biology Program, Harvard Medical School, Boston, MA, USA
| | - Alfredo M Valencia
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Chemical Biology Program, Harvard Medical School, Boston, MA, USA
| | - Takashi Onikubo
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, USA
| | - Yan Han
- Department of Molecular Biosciences, Northwestern University, Evanston, IL, USA
| | - Yuan He
- Department of Molecular Biosciences, Northwestern University, Evanston, IL, USA
| | | | - Frank DiMaio
- Department of Biochemistry, University of Washington, Seattle, WA, USA.
| | - Thomas Walz
- Laboratory of Molecular Electron Microscopy, The Rockefeller University, New York, NY, USA.
| | - Cigall Kadoch
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA.
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6
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Ghate NB, Kim J, Shin Y, Situ A, Ulmer TS, An W. p32 is a negative regulator of p53 tetramerization and transactivation. Mol Oncol 2019; 13:1976-1992. [PMID: 31293051 PMCID: PMC6717765 DOI: 10.1002/1878-0261.12543] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/03/2019] [Accepted: 07/08/2019] [Indexed: 01/10/2023] Open
Abstract
p53 is a sequence-specific transcription factor, and proper regulation of p53 transcriptional activity is critical for orchestrating different tumor-suppressive mechanisms. p32 is a multifunctional protein which interacts with a large number of viral proteins and transcription factors. Here, we investigate the effect of p32 on p53 transactivation and identify a novel mechanism by which p32 alters the functional characteristics of p53. Specifically, p32 attenuates p53-dependent transcription through impairment of p53 binding to its response elements on target genes. Upon p32 expression, p53 levels bound at target genes are decreased, and p53 target genes are inactivated, strongly indicating that p32 restricts p53 occupancy and function at target genes. The primary mechanism contributing to the observed action of p32 is the ability of p32 to interact with the p53 tetramerization domain and to block p53 tetramerization, which in turn enhances nuclear export and degradation of p53, leading to defective p53 transactivation. Collectively, these data establish p32 as a negative regulator of p53 function and suggest the therapeutic potential of targeting p32 for cancer treatment.
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Affiliation(s)
- Nikhil Baban Ghate
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer CenterUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Jinman Kim
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer CenterUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Yonghwan Shin
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer CenterUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Alan Situ
- Department of Biochemistry and Molecular Medicine, Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Tobias S. Ulmer
- Department of Biochemistry and Molecular Medicine, Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Norris Comprehensive Cancer CenterUniversity of Southern CaliforniaLos AngelesCAUSA
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7
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The transformation of the DNA template in RNA polymerase II transcription: a historical perspective. Nat Struct Mol Biol 2019; 26:766-770. [PMID: 31439939 DOI: 10.1038/s41594-019-0278-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 07/10/2019] [Indexed: 11/08/2022]
Abstract
The discovery of RNA polymerases I, II, and III opened up a new era in gene expression. Here I provide a personal retrospective account of the transformation of the DNA template, as it evolved from naked DNA to chromatin, in the biochemical analysis of transcription by RNA polymerase II. These studies have revealed new insights into the mechanisms by which transcription factors function with chromatin to regulate gene expression.
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8
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Beh LY, Debelouchina GT, Clay DM, Thompson RE, Lindblad KA, Hutton ER, Bracht JR, Sebra RP, Muir TW, Landweber LF. Identification of a DNA N6-Adenine Methyltransferase Complex and Its Impact on Chromatin Organization. Cell 2019; 177:1781-1796.e25. [PMID: 31104845 DOI: 10.1016/j.cell.2019.04.028] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/31/2019] [Accepted: 04/12/2019] [Indexed: 11/27/2022]
Abstract
DNA N6-adenine methylation (6mA) has recently been described in diverse eukaryotes, spanning unicellular organisms to metazoa. Here, we report a DNA 6mA methyltransferase complex in ciliates, termed MTA1c. It consists of two MT-A70 proteins and two homeobox-like DNA-binding proteins and specifically methylates dsDNA. Disruption of the catalytic subunit, MTA1, in the ciliate Oxytricha leads to genome-wide loss of 6mA and abolishment of the consensus ApT dimethylated motif. Mutants fail to complete the sexual cycle, which normally coincides with peak MTA1 expression. We investigate the impact of 6mA on nucleosome occupancy in vitro by reconstructing complete, full-length Oxytricha chromosomes harboring 6mA in native or ectopic positions. We show that 6mA directly disfavors nucleosomes in vitro in a local, quantitative manner, independent of DNA sequence. Furthermore, the chromatin remodeler ACF can overcome this effect. Our study identifies a diverged DNA N6-adenine methyltransferase and defines the role of 6mA in chromatin organization.
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Affiliation(s)
- Leslie Y Beh
- Departments of Biochemistry & Molecular Biophysics and Biological Sciences, Columbia University, New York, NY 10032, USA; Department of Chemistry, Princeton University, Princeton, NJ 08544, USA; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA
| | | | - Derek M Clay
- Departments of Biochemistry & Molecular Biophysics and Biological Sciences, Columbia University, New York, NY 10032, USA
| | - Robert E Thompson
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Kelsi A Lindblad
- Departments of Biochemistry & Molecular Biophysics and Biological Sciences, Columbia University, New York, NY 10032, USA
| | - Elizabeth R Hutton
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA
| | - John R Bracht
- Department of Biology, American University, Washington, DC 20016, USA
| | - Robert P Sebra
- Icahn Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Tom W Muir
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
| | - Laura F Landweber
- Departments of Biochemistry & Molecular Biophysics and Biological Sciences, Columbia University, New York, NY 10032, USA.
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9
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Shimada M, Chen WY, Nakadai T, Onikubo T, Guermah M, Rhodes D, Roeder RG. Gene-Specific H1 Eviction through a Transcriptional Activator→p300→NAP1→H1 Pathway. Mol Cell 2019; 74:268-283.e5. [PMID: 30902546 DOI: 10.1016/j.molcel.2019.02.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 01/07/2019] [Accepted: 02/12/2019] [Indexed: 02/03/2023]
Abstract
Linker histone H1 has been correlated with transcriptional inhibition, but the mechanistic basis of the inhibition and its reversal during gene activation has remained enigmatic. We report that H1-compacted chromatin, reconstituted in vitro, blocks transcription by abrogating core histone modifications by p300 but not activator and p300 binding. Transcription from H1-bound chromatin is elicited by the H1 chaperone NAP1, which is recruited in a gene-specific manner through direct interactions with activator-bound p300 that facilitate core histone acetylation (by p300) and concomitant eviction of H1 and H2A-H2B. An analysis in B cells confirms the strong dependency on NAP1-mediated H1 eviction for induction of the silent CD40 gene and further demonstrates that H1 eviction, seeded by activator-p300-NAP1-H1 interactions, is propagated over a CCCTC-binding factor (CTCF)-demarcated region through a distinct mechanism that also involves NAP1. Our results confirm direct transcriptional inhibition by H1 and establish a gene-specific H1 eviction mechanism through an activator→p300→NAP1→H1 pathway.
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Affiliation(s)
- Miho Shimada
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Wei-Yi Chen
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA; Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 112, Taiwan; Cancer Progression Research Center, National Yang-Ming University, Taipei 112, Taiwan
| | - Tomoyoshi Nakadai
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Takashi Onikubo
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Mohamed Guermah
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Daniela Rhodes
- NTU Institute of Structural Biology and School of Biological Sciences, Nanyang Technological University, Singapore 636921, Singapore
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA.
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10
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Huang H, Tang S, Ji M, Tang Z, Shimada M, Liu X, Qi S, Locasale JW, Roeder RG, Zhao Y, Li X. p300-Mediated Lysine 2-Hydroxyisobutyrylation Regulates Glycolysis. Mol Cell 2019; 70:663-678.e6. [PMID: 29775581 DOI: 10.1016/j.molcel.2018.04.011] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 01/24/2018] [Accepted: 04/12/2018] [Indexed: 12/25/2022]
Abstract
Lysine 2-hydroxyisobutyrylation (Khib) is an evolutionarily conserved and widespread histone mark like lysine acetylation (Kac). Here we report that p300 functions as a lysine 2-hyroxyisobutyryltransferase to regulate glycolysis in response to nutritional cues. We discovered that p300 differentially regulates Khib and Kac on distinct lysine sites, with only 6 of the 149 p300-targeted Khib sites overlapping with the 693 p300-targeted Kac sites. We demonstrate that diverse cellular proteins, particularly glycolytic enzymes, are targeted by p300 for Khib, but not for Kac. Specifically, deletion of p300 significantly reduces Khib levels on several p300-dependent, Khib-specific sites on key glycolytic enzymes including ENO1, decreasing their catalytic activities. Consequently, p300-deficient cells have impaired glycolysis and are hypersensitive to glucose-depletion-induced cell death. Our study reveals an p300-catalyzed, Khib-specific molecular mechanism that regulates cellular glucose metabolism and further indicate that p300 has an intrinsic ability to select short-chain acyl-CoA-dependent protein substrates.
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Affiliation(s)
- He Huang
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - Shuang Tang
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Ming Ji
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Zhanyun Tang
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Miho Shimada
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Xiaojing Liu
- Department of Pharmacology and Cancer Biology, Duke Cancer Institute, Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Shankang Qi
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - Jason W Locasale
- Department of Pharmacology and Cancer Biology, Duke Cancer Institute, Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Yingming Zhao
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL 60637, USA.
| | - Xiaoling Li
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.
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11
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Balas MM, Porman AM, Hansen KC, Johnson AM. SILAC-MS Profiling of Reconstituted Human Chromatin Platforms for the Study of Transcription and RNA Regulation. J Proteome Res 2018; 17:3475-3484. [PMID: 30192551 DOI: 10.1021/acs.jproteome.8b00395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
DNA packaged into chromatin is the core structure of the human genome. Nearly all eukaryotic genome regulation must interface with this genomic structure, and modification of the chromatin can influence molecular mechanisms that regulate the underlying DNA. Many processes are governed by regulated stepwise assembly mechanisms that build complex machinery on chromatin to license a specific activity such as transcription. Transcriptional activators drive the initial steps of gene expression, regulated in part by chromatin. Here we describe tools to study the stepwise assembly of protein complexes on chromatin in a highly controlled manner using reconstituted human chromatin platforms and quantitative proteomic profiling. We profile the early steps in transcriptional activation and highlight the potential for understanding the multiple ways chromatin can influence transcriptional regulation. We also describe modifications of this approach to study the activity of a long noncoding RNA to act as a dynamic scaffold for proteins to be recruited to chromatin. This approach has the potential to provide a more comprehensive understanding of important macromolecular complex assembly that occurs on the human genome. The reconstituted nature of the chromatin substrate offers a tunable system that can be trapped at specific substeps to understand how chromatin interfaces with genome regulation machinery.
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12
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Wang WL, Shechter D. Chromatin assembly and transcriptional cross-talk in Xenopus laevis oocyte and egg extracts. THE INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 2018; 60:315-320. [PMID: 27759158 DOI: 10.1387/ijdb.160161ds] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Chromatin, primarily a complex of DNA and histone proteins, is the physiological form of the genome. Chromatin is generally repressive for transcription and other information transactions that occur on DNA. A wealth of post-translational modifications on canonical histones and histone variants encode regulatory information to recruit or repel effector proteins on chromatin, promoting and further repressing transcription and thereby form the basis of epigenetic information. During metazoan oogenesis, large quantities of histone proteins are synthesized and stored in preparation for the rapid early cell cycles of development and to elicit maternal control of chromatin assembly pathways. Oocyte and egg cell-free extracts of the frog Xenopus laevis are a compelling model system for the study of chromatin assembly and transcription, precisely because they exist in an extreme state primed for rapid chromatin assembly or for transcriptional activity. We show that chromatin assembly rates are slower in the X. laevis oocyte than in egg extracts, while conversely, only oocyte extracts transcribe template plasmids. We demonstrate that rapid chromatin assembly in egg extracts represses RNA Polymerase II dependent transcription, while pre-binding of TATA-Binding Protein (TBP) to a template plasmid promotes transcription. Our experimental evidence presented here supports a model in which chromatin assembly and transcription are in competition and that the onset of zygotic genomic activation may be in part due to stable transcriptional complex assembly.
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Affiliation(s)
- Wei-Lin Wang
- Department of Biochemistry. Albert Einstein College of Medicine, Bronx, NY, USA
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13
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Huang D, Lan W, Li D, Deng B, Lin W, Ren Y, Miao Y. WHIRLY1 Occupancy Affects Histone Lysine Modification and WRKY53 Transcription in Arabidopsis Developmental Manner. FRONTIERS IN PLANT SCIENCE 2018; 9:1503. [PMID: 30405658 PMCID: PMC6202938 DOI: 10.3389/fpls.2018.01503] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 09/26/2018] [Indexed: 05/21/2023]
Abstract
Single-stranded DNA-binding proteins (SSBs) are assumed to involve in DNA replication, DNA repairmen, and gene transcription. Here, we provide the direct evidence on the functionality of an Arabidopsis SSB, WHIRLY1, by using loss- or gain-of-function lines. We show that WHIRLY1 binding to the promoter of WRKY53 represses the enrichment of H3K4me3, but enhances the enrichment of H3K9ac at the region contained WHIRLY1-binding sequences and TATA box or the translation start region of WRKY53, coincided with a recruitment of RNAPII. In vitro ChIP assays confirm that WHIRLY1 inhibits H3K4me3 enrichment at the preinitiation complex formation stage, while promotes H3K9ac enrichment and RNAPII recruitment at the elongation stage, consequently affecting the transcription of WRKY53. These results further explore the molecular actions underlying SSB-mediated gene transcription through epigenetic regulation in plant senescence.
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14
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Kebede AF, Nieborak A, Shahidian LZ, Le Gras S, Richter F, Gómez DA, Baltissen MP, Meszaros G, Magliarelli HDF, Taudt A, Margueron R, Colomé-Tatché M, Ricci R, Daujat S, Vermeulen M, Mittler G, Schneider R. Histone propionylation is a mark of active chromatin. Nat Struct Mol Biol 2017; 24:1048-1056. [PMID: 29058708 DOI: 10.1038/nsmb.3490] [Citation(s) in RCA: 122] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 09/22/2017] [Indexed: 12/17/2022]
Abstract
Histones are highly covalently modified, but the functions of many of these modifications remain unknown. In particular, it is unclear how histone marks are coupled to cellular metabolism and how this coupling affects chromatin architecture. We identified histone H3 Lys14 (H3K14) as a site of propionylation and butyrylation in vivo and carried out the first systematic characterization of histone propionylation. We found that H3K14pr and H3K14bu are deposited by histone acetyltransferases, are preferentially enriched at promoters of active genes and are recognized by acylation-state-specific reader proteins. In agreement with these findings, propionyl-CoA was able to stimulate transcription in an in vitro transcription system. Notably, genome-wide H3 acylation profiles were redefined following changes to the metabolic state, and deletion of the metabolic enzyme propionyl-CoA carboxylase altered global histone propionylation levels. We propose that histone propionylation, acetylation and butyrylation may act in combination to promote high transcriptional output and to couple cellular metabolism with chromatin structure and function.
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Affiliation(s)
- Adam F Kebede
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Anna Nieborak
- Institute of Functional Epigenetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Lara Zorro Shahidian
- Institute of Functional Epigenetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Stephanie Le Gras
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Florian Richter
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Goethe-Universität Fachbereich Medizin, Frankfurt, Germany
| | - Diana Aguilar Gómez
- Institute of Functional Epigenetics, Helmholtz Zentrum München, Neuherberg, Germany.,Undergraduate Program in Genomic Sciences, National Autonomous University of Mexico, Mexico City, Mexico
| | - Marijke P Baltissen
- Radboud University Nijmegen, Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands
| | - Gergo Meszaros
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Université de Strasbourg, Strasbourg, France.,Laboratoire de Biochimie et de Biologie Moléculaire, Nouvel Hôpital Civil, Strasbourg, France
| | | | - Aaron Taudt
- European Research Institute for the Biology of Ageing, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.,Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
| | | | - Maria Colomé-Tatché
- European Research Institute for the Biology of Ageing, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.,Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany.,Technical University Munich, Freising, Germany
| | - Romeo Ricci
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Université de Strasbourg, Strasbourg, France.,Laboratoire de Biochimie et de Biologie Moléculaire, Nouvel Hôpital Civil, Strasbourg, France
| | - Sylvain Daujat
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | - Michiel Vermeulen
- Radboud University Nijmegen, Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands
| | - Gerhard Mittler
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Robert Schneider
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institute of Functional Epigenetics, Helmholtz Zentrum München, Neuherberg, Germany.,Ludwig-Maximilains-Universität München, Faculty of Biology, Munich, Germany
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15
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Wang SP, Tang Z, Chen CW, Shimada M, Koche RP, Wang LH, Nakadai T, Chramiec A, Krivtsov AV, Armstrong SA, Roeder RG. A UTX-MLL4-p300 Transcriptional Regulatory Network Coordinately Shapes Active Enhancer Landscapes for Eliciting Transcription. Mol Cell 2017; 67:308-321.e6. [PMID: 28732206 DOI: 10.1016/j.molcel.2017.06.028] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 04/29/2017] [Accepted: 06/22/2017] [Indexed: 02/03/2023]
Abstract
Enhancer activation is a critical step for gene activation. Here we report an epigenetic crosstalk at enhancers between the UTX (H3K27 demethylase)-MLL4 (H3K4 methyltransferase) complex and the histone acetyltransferase p300. We demonstrate that UTX, in a demethylase activity-independent manner, facilitates conversion of inactive enhancers in embryonic stem cells to an active (H3K4me1+/H3K27ac+) state by recruiting and coupling the enzymatic functions of MLL4 and p300. Loss of UTX leads to attenuated enhancer activity, characterized by reduced levels of H3K4me1 and H3K27ac as well as impaired transcription. The UTX-MLL4 complex enhances p300-dependent H3K27 acetylation through UTX-dependent stimulation of p300 recruitment, while MLL4-mediated H3K4 monomethylation, reciprocally, requires p300 function. Importantly, MLL4-generated H3K4me1 further enhances p300-dependent transcription. This work reveals a previously unrecognized cooperativity among enhancer-associated chromatin modulators, including a unique function for UTX, in establishing an "active enhancer landscape" and defines a detailed mechanism for the joint deposition of H3K4me1 and H3K27ac.
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Affiliation(s)
- Shu-Ping Wang
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Zhanyun Tang
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Chun-Wei Chen
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02215, USA
| | - Miho Shimada
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Richard P Koche
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Lan-Hsin Wang
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 11490, Taiwan
| | - Tomoyoshi Nakadai
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Alan Chramiec
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Andrei V Krivtsov
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02215, USA
| | - Scott A Armstrong
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02215, USA
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA.
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16
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Goudarzi A, Zhang D, Huang H, Barral S, Kwon OK, Qi S, Tang Z, Buchou T, Vitte AL, He T, Cheng Z, Montellier E, Gaucher J, Curtet S, Debernardi A, Charbonnier G, Puthier D, Petosa C, Panne D, Rousseaux S, Roeder RG, Zhao Y, Khochbin S. Dynamic Competing Histone H4 K5K8 Acetylation and Butyrylation Are Hallmarks of Highly Active Gene Promoters. Mol Cell 2017; 62:169-180. [PMID: 27105113 PMCID: PMC4850424 DOI: 10.1016/j.molcel.2016.03.014] [Citation(s) in RCA: 185] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 02/05/2016] [Accepted: 03/10/2016] [Indexed: 12/01/2022]
Abstract
Recently discovered histone lysine acylation marks increase the functional diversity of nucleosomes well beyond acetylation. Here, we focus on histone butyrylation in the context of sperm cell differentiation. Specifically, we investigate the butyrylation of histone H4 lysine 5 and 8 at gene promoters where acetylation guides the binding of Brdt, a bromodomain-containing protein, thereby mediating stage-specific gene expression programs and post-meiotic chromatin reorganization. Genome-wide mapping data show that highly active Brdt-bound gene promoters systematically harbor competing histone acetylation and butyrylation marks at H4 K5 and H4 K8. Despite acting as a direct stimulator of transcription, histone butyrylation competes with acetylation, especially at H4 K5, to prevent Brdt binding. Additionally, H4 K5K8 butyrylation also marks retarded histone removal during late spermatogenesis. Hence, alternating H4 acetylation and butyrylation, while sustaining direct gene activation and dynamic bromodomain binding, could impact the final male epigenome features. Active gene TSSs are marked by competing H4 K5K8 acetylation and butyrylation Histone butyrylation directly stimulates transcription H4K5 butyrylation prevents binding of the testis specific gene expression-driver Brdt H4K5K8 butyrylation is associated with delayed histone removal in spermatogenic cells
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Affiliation(s)
- Afsaneh Goudarzi
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Di Zhang
- Ben May Department of Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - He Huang
- Ben May Department of Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - Sophie Barral
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Oh Kwang Kwon
- Ben May Department of Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - Shankang Qi
- Ben May Department of Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - Zhanyun Tang
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Thierry Buchou
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Anne-Laure Vitte
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Tieming He
- Jingjie PTM Biolab (Hangzhou) Co., Ltd., Hangzhou 310018, China
| | - Zhongyi Cheng
- Jingjie PTM Biolab (Hangzhou) Co., Ltd., Hangzhou 310018, China
| | - Emilie Montellier
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Jonathan Gaucher
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France; EMBL Grenoble, BP 181, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Sandrine Curtet
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Alexandra Debernardi
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Guillaume Charbonnier
- TAGC, UMR, S 1090 INSERM Aix-Marseille Université, U928 Parc Scientifique de Luminy case 928 163, Avenue de Luminy, 13288 Marseille Cedex 9, France
| | - Denis Puthier
- TAGC, UMR, S 1090 INSERM Aix-Marseille Université, U928 Parc Scientifique de Luminy case 928 163, Avenue de Luminy, 13288 Marseille Cedex 9, France
| | - Carlo Petosa
- Université Grenoble Alpes/CEA/CNRS, Institut de Biologie Structurale, 38027 Grenoble, France
| | - Daniel Panne
- EMBL Grenoble, BP 181, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Sophie Rousseaux
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
| | - Yingming Zhao
- Ben May Department of Cancer Research, The University of Chicago, Chicago, IL 60637, USA.
| | - Saadi Khochbin
- CNRS UMR 5309, INSERM, U1209, Université Grenoble Alpes, Institut Albert Bonniot, 38700 Grenoble, France.
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17
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Stützer A, Liokatis S, Kiesel A, Schwarzer D, Sprangers R, Söding J, Selenko P, Fischle W. Modulations of DNA Contacts by Linker Histones and Post-translational Modifications Determine the Mobility and Modifiability of Nucleosomal H3 Tails. Mol Cell 2016; 61:247-59. [PMID: 26778125 DOI: 10.1016/j.molcel.2015.12.015] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 09/23/2015] [Accepted: 12/03/2015] [Indexed: 10/22/2022]
Abstract
Post-translational histone modifications and linker histone incorporation regulate chromatin structure and genome activity. How these systems interface on a molecular level is unclear. Using biochemistry and NMR spectroscopy, we deduced mechanistic insights into the modification behavior of N-terminal histone H3 tails in different nucleosomal contexts. We find that linker histones generally inhibit modifications of different H3 sites and reduce H3 tail dynamics in nucleosomes. These effects are caused by modulations of electrostatic interactions of H3 tails with linker DNA and largely depend on the C-terminal domains of linker histones. In agreement, linker histone occupancy and H3 tail modifications segregate on a genome-wide level. Charge-modulating modifications such as phosphorylation and acetylation weaken transient H3 tail-linker DNA interactions, increase H3 tail dynamics, and, concomitantly, enhance general modifiability. We propose that alterations of H3 tail-linker DNA interactions by linker histones and charge-modulating modifications execute basal control mechanisms of chromatin function.
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Affiliation(s)
- Alexandra Stützer
- Laboratory of Chromatin Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Stamatios Liokatis
- Department of NMR-Supported Structural Biology, Leibniz Institute of Molecular Pharmacology (FMP Berlin), Robert-Rössle Strasse 10, 13125 Berlin, Germany
| | - Anja Kiesel
- Research Group of Computational Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Dirk Schwarzer
- Department of Chemical Biology, Leibniz Institute of Molecular Pharmacology (FMP Berlin), Robert-Rössle Strasse 10, 13125 Berlin, Germany
| | - Remco Sprangers
- Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Johannes Söding
- Research Group of Computational Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany; Gene Center and Center for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universität München, Feodor-Lynen-Strasse 25, 81377 Munich, Germany
| | - Philipp Selenko
- Department of NMR-Supported Structural Biology, Leibniz Institute of Molecular Pharmacology (FMP Berlin), Robert-Rössle Strasse 10, 13125 Berlin, Germany.
| | - Wolfgang Fischle
- Laboratory of Chromatin Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany.
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18
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Tatavosian R, Zhen CY, Duc HN, Balas MM, Johnson AM, Ren X. Distinct Cellular Assembly Stoichiometry of Polycomb Complexes on Chromatin Revealed by Single-molecule Chromatin Immunoprecipitation Imaging. J Biol Chem 2015; 290:28038-28054. [PMID: 26381410 DOI: 10.1074/jbc.m115.671115] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Indexed: 12/11/2022] Open
Abstract
Epigenetic complexes play an essential role in regulating chromatin structure, but information about their assembly stoichiometry on chromatin within cells is poorly understood. The cellular assembly stoichiometry is critical for appreciating the initiation, propagation, and maintenance of epigenetic inheritance during normal development and in cancer. By combining genetic engineering, chromatin biochemistry, and single-molecule fluorescence imaging, we developed a novel and sensitive approach termed single-molecule chromatin immunoprecipitation imaging (Sm-ChIPi) to enable investigation of the cellular assembly stoichiometry of epigenetic complexes on chromatin. Sm-ChIPi was validated by using chromatin complexes with known stoichiometry. The stoichiometry of subunits within a polycomb complex and the assembly stoichiometry of polycomb complexes on chromatin have been extensively studied but reached divergent views. Moreover, the cellular assembly stoichiometry of polycomb complexes on chromatin remains unexplored. Using Sm-ChIPi, we demonstrated that within mouse embryonic stem cells, one polycomb repressive complex (PRC) 1 associates with multiple nucleosomes, whereas two PRC2s can bind to a single nucleosome. Furthermore, we obtained direct physical evidence that the nucleoplasmic PRC1 is monomeric, whereas PRC2 can dimerize in the nucleoplasm. We showed that ES cell differentiation induces selective alteration of the assembly stoichiometry of Cbx2 on chromatin but not other PRC1 components. We additionally showed that the PRC2-mediated trimethylation of H3K27 is not required for the assembly stoichiometry of PRC1 on chromatin. Thus, these findings uncover that PRC1 and PRC2 employ distinct mechanisms to assemble on chromatin, and the novel Sm-ChIPi technique could provide single-molecule insight into other epigenetic complexes.
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Affiliation(s)
- Roubina Tatavosian
- Department of Chemistry, University of Colorado Denver, Denver, Colorado 80217-3364
| | - Chao Yu Zhen
- Department of Chemistry, University of Colorado Denver, Denver, Colorado 80217-3364
| | - Huy Nguyen Duc
- Department of Chemistry, University of Colorado Denver, Denver, Colorado 80217-3364
| | - Maggie M Balas
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado 80045
| | - Aaron M Johnson
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado 80045
| | - Xiaojun Ren
- Department of Chemistry, University of Colorado Denver, Denver, Colorado 80217-3364.
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19
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Affiliation(s)
- Manuel M. Müller
- Department of Chemistry, Princeton University,
Frick Laboratory, Princeton, New Jersey 08544, United States
| | - Tom W. Muir
- Department of Chemistry, Princeton University,
Frick Laboratory, Princeton, New Jersey 08544, United States
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20
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Methods to study histone chaperone function in nucleosome assembly and chromatin transcription. Methods Mol Biol 2015; 1288:375-94. [PMID: 25827892 DOI: 10.1007/978-1-4939-2474-5_22] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Histone chaperones are histone interacting proteins that are involved in various stages of histone metabolism in the cell such as histone storage, transport, nucleosome assembly and disassembly. Histone assembly and disassembly are essential processes in certain DNA-templated phenomena such as replication, repair and transcription in eukaryotes. Since the first histone chaperone Nucleoplasmin was discovered in Xenopus, a plethora of histone chaperones have been identified, characterized and their functional significance elucidated in the last 35 years or so. Some of the histone chaperone containing complexes such as FACT have been described to play a significant role in nucleosome disassembly during transcription elongation. We have reported earlier that human Nucleophosmin (NPM1), a histone chaperone belonging to the Nucleoplasmin family, is a co-activator of transcription. In this chapter, we describe several methods that are used to study the histone chaperone activity of proteins and their role in transcription.
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21
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Affiliation(s)
- Jiannan Guo
- Biochemistry Department, University of Iowa , Iowa City, Iowa 52242, United States
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22
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Tang Z, Chen WY, Shimada M, Nguyen UTT, Kim J, Sun XJ, Sengoku T, McGinty RK, Fernandez JP, Muir TW, Roeder RG. SET1 and p300 act synergistically, through coupled histone modifications, in transcriptional activation by p53. Cell 2013; 154:297-310. [PMID: 23870121 PMCID: PMC4023349 DOI: 10.1016/j.cell.2013.06.027] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 03/21/2013] [Accepted: 06/18/2013] [Indexed: 12/13/2022]
Abstract
The H3K4me3 mark in chromatin is closely correlated with actively transcribed genes, although the mechanisms involved in its generation and function are not fully understood. In vitro studies with recombinant chromatin and purified human factors demonstrate a robust SET1 complex (SET1C)-mediated H3K4 trimethylation that is dependent upon p53- and p300-mediated H3 acetylation, a corresponding SET1C-mediated enhancement of p53- and p300-dependent transcription that reflects a primary effect of SET1C through H3K4 trimethylation, and direct SET1C-p53 and SET1C-p300 interactions indicative of a targeted recruitment mechanism. Complementary cell-based assays demonstrate a DNA-damage-induced p53-SET1C interaction, a corresponding enrichment of SET1C and H3K4me3 on a p53 target gene (p21/WAF1), and a corresponding codependency of H3K4 trimethylation and transcription upon p300 and SET1C. These results establish a mechanism in which SET1C and p300 act cooperatively, through direct interactions and coupled histone modifications, to facilitate the function of p53.
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Affiliation(s)
- Zhanyun Tang
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
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23
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Awad S, Kunhi M, Little GH, Bai Y, An W, Bers D, Kedes L, Poizat C. Nuclear CaMKII enhances histone H3 phosphorylation and remodels chromatin during cardiac hypertrophy. Nucleic Acids Res 2013; 41:7656-72. [PMID: 23804765 PMCID: PMC3763528 DOI: 10.1093/nar/gkt500] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Calcium/calmodulin-dependent protein kinase II (CaMKII) plays a central role in pathological cardiac hypertrophy, but the mechanisms by which it modulates gene activity in the nucleus to mediate hypertrophic signaling remain unclear. Here, we report that nuclear CaMKII activates cardiac transcription by directly binding to chromatin and regulating the phosphorylation of histone H3 at serine-10. These specific activities are demonstrated both in vitro and in primary neonatal rat cardiomyocytes. Activation of CaMKII signaling by hypertrophic agonists increases H3 phosphorylation in primary cardiac cells and is accompanied by concomitant cellular hypertrophy. Conversely, specific silencing of nuclear CaMKII using RNA interference reduces both H3 phosphorylation and cellular hypertrophy. The hyper-phosphorylation of H3 associated with increased chromatin binding of CaMKII occurs at specific gene loci reactivated during cardiac hypertrophy. Importantly, H3 Ser-10 phosphorylation and CaMKII recruitment are associated with increased chromatin accessibility and are required for chromatin-mediated transcription of the Mef2 transcription factor. Unlike phosphorylation of H3 by other kinases, which regulates cellular proliferation and immediate early gene activation, CaMKII-mediated signaling to H3 is associated with hypertrophic growth. These observations reveal a previously unrecognized function of CaMKII as a kinase signaling to histone H3 and remodeling chromatin. They suggest a new epigenetic mechanism controlling cardiac hypertrophy.
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Affiliation(s)
- Salma Awad
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Muhammad Kunhi
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Gillian H. Little
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Yan Bai
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Woojin An
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Donald Bers
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Larry Kedes
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Coralie Poizat
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, PO Box 3354, Riyadh 11211, Kingdom of Saudi Arabia, Institute for Genetic Medicine, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90033, USA, Department of Biochemistry and Molecular Biology, University of Southern California 2250 Alcazar Street, Los Angeles, CA 90089, USA, Department of Pharmacology, University of California at Davis, Davis, CA 95616, USA and Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA,*To whom correspondence should be addressed. Tel: +966 1 464 7272 (ext. 32984); Fax: +966 1 464 7858; or
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Jiang H, Lu X, Shimada M, Dou Y, Tang Z, Roeder RG. Regulation of transcription by the MLL2 complex and MLL complex-associated AKAP95. Nat Struct Mol Biol 2013; 20:1156-63. [PMID: 23995757 PMCID: PMC3813012 DOI: 10.1038/nsmb.2656] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 07/24/2013] [Indexed: 01/18/2023]
Abstract
Although histone H3 lysine 4 (H3K4) methylation is widely associated with gene activation, direct evidence for its causal role in transcription, through specific MLL family members, is scarce. Here we have purified a human MLL2 (Kmt2b) complex that is highly active in H3K4 methylation and chromatin transcription in a cell-free system. This effect requires SAM and intact H3K4, establishing a direct and causal role for MLL2-mediated H3K4 methylation in transcription. We then show that human AKAP95, a chromatin-associated protein, is physically and functionally associated with the DPY30–MLL complexes and directly enhances their methyltransferase activity. Ectopic AKAP95 stimulates expression of a chromosomal reporter in synergy with MLL1 or MLL2, whereas AKAP95 depletion impairs retinoic acid-mediated gene induction in embryonic stem cells. These results demonstrate an important role for AKAP95 in regulating histone methylation and gene expression, particularly during cell fate transitions.
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Affiliation(s)
- Hao Jiang
- 1] Laboratory of Biochemistry and Molecular Biology, Rockefeller University, New York, New York, USA. [2] Department of Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, Alabama, USA. [3] UAB Stem Cell Institute, University of Alabama at Birmingham, Birmingham, Alabama, USA. [4]
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H3R42me2a is a histone modification with positive transcriptional effects. Proc Natl Acad Sci U S A 2013; 110:14894-9. [PMID: 23980157 DOI: 10.1073/pnas.1312925110] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Histone posttranslational modification leads to downstream effects indirectly by allowing or preventing docking of effector molecules, or directly by changing the intrinsic biophysical properties of local chromatin. To date, little has been done to study posttranslational modifications that lie outside of the unstructured tail domains of histones. Core residues, and in particular arginines in H3 and H4, mediate key interactions between the histone octamer and DNA in forming the nucleosomal particle. Using mass spectrometry, we find that one of these core residues, arginine 42 of histone H3 (H3R42), is dimethylated in mammalian cells by the methyltransferases coactivator arginine methyltransferase 1 (CARM1) and protein arginine methyltransferase 6 (PRMT6) in vitro and in vivo, and we demonstrate that methylation of H3R42 stimulates transcription in vitro from chromatinized templates. Thus, H3R42 is a new, "nontail" histone methylation site with positive effects on transcription. We propose that methylation of basic histone residues at the DNA interface may disrupt histone:DNA interactions, with effects on downstream processes, notably transcription.
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Lauberth SM, Nakayama T, Wu X, Ferris AL, Tang Z, Hughes SH, Roeder RG. H3K4me3 interactions with TAF3 regulate preinitiation complex assembly and selective gene activation. Cell 2013; 152:1021-36. [PMID: 23452851 DOI: 10.1016/j.cell.2013.01.052] [Citation(s) in RCA: 300] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 07/31/2012] [Accepted: 01/28/2013] [Indexed: 10/27/2022]
Abstract
Histone modifications regulate chromatin-dependent processes, yet the mechanisms by which they contribute to specific outcomes remain unclear. H3K4me3 is a prominent histone mark that is associated with active genes and promotes transcription through interactions with effector proteins that include initiation factor TFIID. We demonstrate that H3K4me3-TAF3 interactions direct global TFIID recruitment to active genes, some of which are p53 targets. Further analyses show that (1) H3K4me3 enhances p53-dependent transcription by stimulating preinitiation complex (PIC) formation; (2) H3K4me3, through TAF3 interactions, can act either independently or cooperatively with the TATA box to direct PIC formation and transcription; and (3) H3K4me3-TAF3/TFIID interactions regulate gene-selective functions of p53 in response to genotoxic stress. Our findings indicate a mechanism by which H3K4me3 directs PIC assembly for the rapid induction of specific p53 target genes.
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Affiliation(s)
- Shannon M Lauberth
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10065, USA
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Kim H, Kim K, Choi J, Heo K, Baek HJ, Roeder RG, An W. p53 requires an intact C-terminal domain for DNA binding and transactivation. J Mol Biol 2011; 415:843-54. [PMID: 22178617 DOI: 10.1016/j.jmb.2011.12.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 11/23/2011] [Accepted: 12/03/2011] [Indexed: 02/08/2023]
Abstract
The tumor suppressor p53 plays a critical role in mediating cellular response to a wide range of environmental stresses. p53 regulates these processes mainly by acting as a short-lived DNA binding protein that stimulates transcription from numerous genes involved in cell cycle arrest, programmed cell death, and other processes. To investigate the importance of the C-terminal domain of p53, we generated a series of deletion and point mutations in this region and analyzed their effects on p53 transcription activity. Our results show that C-terminal deletion and point mutations at K320 and K382 abolish p53-mediated transcription in the context of DNA or chromatin. This defect is specific for DNA molecules because inactive mutants fail to bind a consensus p53 response element in both free DNA and nucleosomes. Chromatin immunoprecipitation assays further substantiate the importance of the p53 C-terminal domain for the targeted localization of p53 and the concomitant recruitment of p300 onto p53-responsive genes. Moreover, a synthetic peptide comprising the last 30 amino acids of p53 interacts with the N-terminal and C-terminal domains of p53 and antagonizes p53-dependent transcription. Taken together, our data reveal a functional requirement for the p53 C-terminal domain in p53 transactivation and support a working model in which the C-terminus serves as a positive regulator for N-terminal activation and central DNA binding domains.
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Affiliation(s)
- Hyunjung Kim
- Department of Biochemistry and Molecular Biology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90033, USA
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Park JH, Magan N. Reverse transcriptase-coupled quantitative real time PCR analysis of cell-free transcription on the chromatin-assembled p21 promoter. PLoS One 2011; 6:e23617. [PMID: 21886803 PMCID: PMC3160311 DOI: 10.1371/journal.pone.0023617] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 07/21/2011] [Indexed: 11/28/2022] Open
Abstract
Background Cell-free eukaryotic transcription assays have contributed tremendously to the current understanding of the molecular mechanisms that govern transcription at eukaryotic promoters. Currently, the conventional G-less cassette transcription assay is one of the simplest and fastest methods for measuring transcription in vitro. This method requires several components, including the radioisotope labelling of RNA product during the transcription reaction followed by visualization of transcripts using autoradiography. Methodology/Principal Findings To further simplify and expedite the conventional G-less cassette transcription assay, we have developed a method to incorporate a reverse transcriptase-coupled quantitative real time PCR (RT-qPCR). By using DNA template depletion steps that include DNA template immobilization, Trizol extraction and DNase I treatment, we have successfully enriched p21 promoter-driven transcripts over DNA templates. The quantification results of RNA transcripts using the RT-qPCR assay were comparable to the results of the conventional G-less cassette transcription assay both in naked DNA and chromatin-assembled templates. Conclusions We first report a proof-of-concept demonstration that incorporating RT-qPCR in cell-free transcription assays can be a simpler and faster alternative method to the conventional radioisotope-mediated transcription assays. This method will be useful for developing high throughput in vitro transcription assays and provide quantitative data for RNA transcripts generated in a defined cell-free transcription reaction.
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Affiliation(s)
- Jeong Hyeon Park
- Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand.
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Abstract
Epigenetics, broadly defined as the inheritance of non-Mendelian phenotypic traits, can be more narrowly defined as heritable alterations in states of gene expression ("on" versus "off") that are not linked to changes in DNA sequence. Moreover, these alterations can persist in the absence of the signals that initiate them, thus suggesting some kind of "memory" to epigenetic forms of regulation. How, for example, during early female mammalian development, is one X chromosome selected to be kept in an active state, while the genetically identical sister X chromosome is "marked" to be inactive, even though they reside in the same nucleus, exposed to the same collection of shared trans-factors? Once X inactivation occurs, how are these contrasting chromatin states maintained and inherited faithfully through subsequent cell divisions? Chromatin states, whether active (euchromatic) or silent (heterochromatic) are established, maintained, and propagated with remarkable precision during normal development and differentiation. However, mistakes made in establishing and maintaining these chromatin states, often executed by a variety of chromatin-remodeling activities, can lead to mis-expression or mis-silencing of critical downstream gene targets with far-reaching implications for human biology and disease, notably cancer. Though chromatin biologists have identified many of the "inputs" that are important for controlling chromatin states, the detailed mechanisms by which these processes work remain largely opaque, in part due to the staggering complexity of the chromatin polymer, the physiologically relevant form of our genome. The primary objective of this article is to serve as a "call to arms" for chemists to contribute to the development of the precision tools needed to answer pressing molecular problems in this rapidly moving field.
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Affiliation(s)
- C David Allis
- Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, NY 10065, USA.
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The human PAF1 complex acts in chromatin transcription elongation both independently and cooperatively with SII/TFIIS. Cell 2010; 140:491-503. [PMID: 20178742 DOI: 10.1016/j.cell.2009.12.050] [Citation(s) in RCA: 199] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2008] [Revised: 07/24/2009] [Accepted: 12/22/2009] [Indexed: 01/12/2023]
Abstract
Genetic and cell-based studies have implicated the PAF1 complex (PAF1C) in transcription-associated events, but there has been no evidence showing a direct role in facilitating transcription of a natural chromatin template. Here, we demonstrate an intrinsic ability of human PAF1C (hPAF1C) to facilitate activator (p53)- and histone acetyltransferase (p300)-dependent transcription elongation from a recombinant chromatin template in a biochemically defined RNA polymerase II transcription system. This represents a PAF1C function distinct from its established role in histone ubiquitylation and methylation. Importantly, we further demonstrate a strong synergy between hPAF1C and elongation factor SII/TFIIS and an underlying mechanism involving direct hPAF1C-SII interactions and cooperative binding to RNA polymerase II. Apart from a distinct PAF1C function, the present observations provide a molecular mechanism for the cooperative function of distinct transcription elongation factors in chromatin transcription.
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Li X, Wu L, Corsa CAS, Kunkel S, Dou Y. Two mammalian MOF complexes regulate transcription activation by distinct mechanisms. Mol Cell 2009; 36:290-301. [PMID: 19854137 DOI: 10.1016/j.molcel.2009.07.031] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Revised: 06/18/2009] [Accepted: 07/31/2009] [Indexed: 02/04/2023]
Abstract
In mammals, MYST family histone acetyltransferase MOF plays important roles in transcription activation by acetylating histone H4 on K16, a prevalent mark associated with chromatin decondensation, and transcription factor p53 on K120, which is important for activation of proapoptotic genes. However, little is known about MOF regulation in higher eukaryotes. Here, we report that the acetyltransferase activity of MOF is tightly regulated in two different but evolutionarily conserved complexes, MSL and MOF-MSL1v1. Importantly, we demonstrate that while the two MOF complexes have indistinguishable activity on histone H4 K16, they differ dramatically in acetylating nonhistone substrate p53. We further demonstrate that MOF-MSL1v1 is specifically required for optimal transcription activation of p53 target genes both in vitro and in vivo. Our results support a model that these two MOF complexes regulate distinct stages of transcription activation in cooperation with other histone modifying activities.
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Affiliation(s)
- Xiangzhi Li
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA
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Biochemical analyses of nuclear receptor-dependent transcription with chromatin templates. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2009; 87:137-92. [PMID: 20374704 DOI: 10.1016/s1877-1173(09)87005-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Chromatin, the physiological template for transcription, plays important roles in gene regulation by nuclear receptors (NRs). It can (1) restrict the binding of NRs or the transcriptional machinery to their genomic targets, (2) serve as a target of regulatory posttranslational modifications by NR coregulator proteins with histone-directed enzymatic activities, and (3) function as a binding scaffold for a variety of transcription-related proteins. The advent of in vitro or "cell-free" systems that accurately recapitulate ligand-dependent transcription by NRs with chromatin templates has allowed detailed analyses of these processes. Biochemical studies have advanced our understanding of the mechanisms of gene regulation, including the role of ligands, coregulators, and nucleosome remodeling. In addition, they have provided new insights about the dynamics of NR-mediated transcription. This chapter reviews the current methodologies for assembling, transcribing, and analyzing chromatin in vitro, as well as the new information that has been gained from these studies.
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Choi J, Heo K, An W. Cooperative action of TIP48 and TIP49 in H2A.Z exchange catalyzed by acetylation of nucleosomal H2A. Nucleic Acids Res 2009; 37:5993-6007. [PMID: 19696079 PMCID: PMC2764430 DOI: 10.1093/nar/gkp660] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
H2A.Z is an evolutionarily conserved H2A variant that plays a key role in the regulation of chromatin transcription. To understand the molecular mechanism of H2A.Z exchange, we purified two distinct H2A.Z-interacting complexes termed the small and big complexes from a human cell line. The big complex contains most components of the SRCAP chromatin remodeling and TIP60 HAT complexes, whereas the small complex possesses only a subset of SRCAP and TIP60 subunits. Our exchange analysis revealed that both small and big complexes enhance the incorporation of H2A.Z-H2B dimer into the nucleosome. In addition, TIP60-mediated acetylation of nucleosomal H2A specifically facilitates the action of the small complex in the H2A.Z exchange reaction. Among factors present in the small complex, we determined that TIP48 and TIP49 play a major role in catalyzing H2A acetylation-induced H2A.Z exchange via their ATPase activities. Overall, our work uncovers the previously-unrecognized role of TIP48 and TIP49 in H2A.Z exchange and a novel epigenetic mechanism controlling this process.
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Affiliation(s)
- Jongkyu Choi
- Department of Biochemistry and Molecular Biology, University of Southern California, Norris Comprehensive Cancer Center, Los Angeles, CA 90033, USA
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Multivalent binding of the ETO corepressor to E proteins facilitates dual repression controls targeting chromatin and the basal transcription machinery. Mol Cell Biol 2009; 29:2644-57. [PMID: 19289505 DOI: 10.1128/mcb.00073-09] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
E proteins are a family of helix-loop-helix transcription factors that play important roles in cell differentiation and homeostasis. They contain at least two activation domains, AD1 and AD2. ETO family proteins and the leukemogenic AML1-ETO fusion protein are corepressors of E proteins. It is thought that ETO represses E-protein activity by interacting with AD1, which competes away p300/CBP histone acetyltransferases. Here we report that E proteins contain another conserved ETO-interacting region, termed DES, and that differential associations with AD1 and DES allow ETO to repress transcription through both chromatin-dependent and chromatin-independent mechanisms. At the chromatin level, AD1 and AD2 cooperatively recruit p300. ETO interacts with AD1 to abolish p300 recruitment and to allow HDAC-dependent silencing. At the post-chromatin-remodeling level, binding to DES enables ETO to directly inhibit activation of the basal transcription machinery. This novel repression mechanism is conserved in ETO family proteins and in the AML1-ETO fusion protein. In addition, the repression capacity exerted by each mechanism is differentially modulated by cross talk among various ETO domains and the AML1 domain of AML1-ETO. In particular, the oligomerization domain of ETO plays a major role in targeting ETO to the DES region and independently potentiates the TAFH domain-mediated AD1 interaction. The ability to exert repression at different levels not only may allow these corepressors to impose robust inhibition of signal-independent transcription but may also allow a rapid response to signals. In addition, our newly defined domain interactions and their interplays have important implications in effectively targeting both E-protein fusion proteins and AML1-ETO found in cancers.
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Transcription of in vitro assembled chromatin templates in a highly purified RNA polymerase II system. Methods 2009; 48:353-60. [PMID: 19272450 DOI: 10.1016/j.ymeth.2009.02.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Accepted: 02/25/2009] [Indexed: 11/20/2022] Open
Abstract
In mammalian cells RNA polymerase II efficiently transcribes nucleosome-packaged DNA. In this regard, a fundamental question concerns the nature and mechanism of action of the accessory factors that are necessary and sufficient for, or enhance, transcription through nucleosomal arrays by RNA polymerase II. Here we describe a highly purified system that allows for efficient activator-dependent transcription by RNA polymerase II from the promoter through several contiguous nucleosomes on defined chromatin templates. The system contains natural or recombinant histones, chromatin assembly factors, the histone-acetyltransferase p300, all components of the general transcription machinery, general coactivators and the elongation factor SII (TFIIS). As examples of the applicability of this system for mechanistic analyses of these and other factors, representative experiments show (i) that activated transcription from chromatin templates is concomitantly dependent on the activator, p300-mediated histone acetylation and elongation factor SII/TFIIS. (ii) that SII/TFIIS acts in a highly synergistic manner with p300 (and histone acetylation) at a step subsequent to preinitiation complex (PIC) formation and (iii) that SII/TFIIS works directly at the elongation step of chromatin transcription. Here we describe purification methods for the different factors employed and the specific transcriptional assays that led to the above-mentioned conclusions. This purified system will be very useful as an assay system for the discovery of new factors or the mechanistic analysis of known or candidate factors involved in transcription initiation or elongation on chromatin templates, including factors that effect specific histone modifications or nucleosomal remodeling.
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Margueron R, Li G, Sarma K, Blais A, Zavadil J, Woodcock CL, Dynlacht BD, Reinberg D. Ezh1 and Ezh2 maintain repressive chromatin through different mechanisms. Mol Cell 2009; 32:503-18. [PMID: 19026781 PMCID: PMC3641558 DOI: 10.1016/j.molcel.2008.11.004] [Citation(s) in RCA: 649] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Revised: 09/01/2008] [Accepted: 11/05/2008] [Indexed: 12/14/2022]
Abstract
Polycomb group proteins are critical to maintaining gene repression established during Drosophila development. Part of this group forms the PRC2 complex containing Ez that catalyzes di- and trimethylation of histone H3 lysine 27 (H3K37me2/3), marks repressive to transcription. We report that the mammalian homologs Ezh1 and Ezh2 form similar PRC2 complexes but exhibit contrasting repressive roles. While PRC2-Ezh2 catalyzes H3K27me2/3 and its knockdown affects global H3K27me2/3 levels, PRC2-Ezh1 performs this function weakly. In accordance, Ezh1 knockdown was ineffectual on global H3K27me2/3 levels. Instead, PRC2-Ezh1 directly and robustly represses transcription from chromatinized templates and compacts chromatin in the absence of the methyltransferase cofactor SAM, as evidenced by electron microscopy. Ezh1 targets a subset of Ezh2 genes, yet Ezh1 is more abundant in nonproliferative adult organs while Ezh2 expression is tightly associated with proliferation, as evidenced when analyzing aging mouse kidney. These results might reflect subfunctionalization of a PcG protein during evolution.
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Affiliation(s)
- Raphael Margueron
- Department of Biochemistry NYU-Medical School 522 First Av., New York, NY 10016, USA
| | - Guohong Li
- Howard Hughes Medical Institute NYU-Medical School 522 First Av., New York, NY 10016, USA
- Department of Biochemistry NYU-Medical School 522 First Av., New York, NY 10016, USA
| | - Kavitha Sarma
- Department of Biochemistry NYU-Medical School 522 First Av., New York, NY 10016, USA
| | - Alexandre Blais
- Department of Pathology and NYU Cancer Institute NYU-Medical School 522 First Av., New York, NY 10016, USA
| | - Jiri Zavadil
- Department of Pathology and NYU Cancer Institute NYU-Medical School 522 First Av., New York, NY 10016, USA
| | - Christopher L. Woodcock
- Department of Biology, Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, MA 01003, USA
| | - Brian D. Dynlacht
- Department of Pathology and NYU Cancer Institute NYU-Medical School 522 First Av., New York, NY 10016, USA
| | - Danny Reinberg
- Howard Hughes Medical Institute NYU-Medical School 522 First Av., New York, NY 10016, USA
- Department of Biochemistry NYU-Medical School 522 First Av., New York, NY 10016, USA
- Corresponding author: Howard Hughes Medical Institute NYU School of Medicine-Smilow Research Center Biochemistry Department 522 First Avenue, 2nd Floor, Room 211 New York, New York 10016 () Tel: 212-263-9036 Fax: 212-263-9040
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Gadad SS, Shandilya J, Swaminathan V, Kundu TK. Histone chaperone as coactivator of chromatin transcription: role of acetylation. Methods Mol Biol 2009; 523:263-278. [PMID: 19381933 DOI: 10.1007/978-1-59745-190-1_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Histone chaperones are a group of histone-interacting proteins, involved in several important cellular functions. These chaperones are essential to facilitate ordered assembly of nucleosomes, both in replication dependent and independent manner. Replication independent function of histone chaperone is necessary for histone eviction during transcriptional initiation and elongation. In this chapter we have discussed a method to evaluate the role of histone chaperone NPM1 (the only known chaperone to get acetylated with functional consequence) in the transcriptional activation which is acetylation dependent.
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Affiliation(s)
- Shrikanth S Gadad
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
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Different functional modes of p300 in activation of RNA polymerase III transcription from chromatin templates. Mol Cell Biol 2008; 28:5764-76. [PMID: 18644873 DOI: 10.1128/mcb.01262-07] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Transcriptional coactivators that regulate the activity of human RNA polymerase III (Pol III) in the context of chromatin have not been reported. Here, we describe a completely defined in vitro system for transcription of a human tRNA gene assembled into a chromatin template. Transcriptional activation and histone acetylation in this system depend on recruitment of p300 by general initiation factor TFIIIC, thus providing a new paradigm for recruitment of histone-modifying coactivators. Beyond its role as a chromatin-modifying factor, p300 displays an acetyltransferase-independent function at the level of preinitiation complex assembly. Thus, direct interaction of p300 with TFIIIC stabilizes binding of TFIIIC to core promoter elements and results in enhanced transcriptional activity on histone-free templates. Additional studies show that p300 is recruited to the promoters of actively transcribed tRNA and U6 snRNA genes in vivo. These studies identify TFIIIC as a recruitment factor for p300 and thus may have important implications for the emerging concept that tRNA genes or TFIIIC binding sites act as chromatin barriers to prohibit spreading of silenced heterochromatin domains.
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Kim K, Choi J, Heo K, Kim H, Levens D, Kohno K, Johnson EM, Brock HW, An W. Isolation and characterization of a novel H1.2 complex that acts as a repressor of p53-mediated transcription. J Biol Chem 2008; 283:9113-26. [PMID: 18258596 DOI: 10.1074/jbc.m708205200] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Linker histone H1 has been generally viewed as a global repressor of transcription by preventing the access of transcription factors to sites in chromatin. However, recent studies suggest that H1 can interact with other regulatory factors for its action as a negative modulator of specific genes. To investigate these aspects, we established a human cell line expressing H1.2, one of the H1 subtypes, for the purification of H1-interacting proteins. Our results showed that H1.2 can stably associate with sets of cofactors and ribosomal proteins that can significantly repress p53-dependent, p300-mediated chromatin transcription. This repressive action of H1.2 complex involves direct interaction of H1.2 with p53, which in turn blocks p300-mediated acetylation of chromatin. YB1 and PURalpha, two factors present in the H1.2 complex, together with H1.2 can closely recapitulate the repressive action of the entire H1.2 complex in transcription. Chromatin immunoprecipitation and RNA interference analyses further confirmed that the recruitment of YB1, PURalpha, and H1.2 to the p53 target gene Bax is required for repression of p53-induced transcription. Therefore, these results reveal a previously unrecognized function of H1 as a transcriptional repressor as well as the underlying mechanism involving specific sets of factors in this repression process.
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Affiliation(s)
- Kyunghwan Kim
- Department of Biochemistry and Molecular Biology, University of Southern California Keck School of Medicine, Los Angeles, CA 90089, USA
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40
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Heo K, Kim B, Kim K, Choi J, Kim H, Zhan Y, Ranish JA, An W. Isolation and characterization of proteins associated with histone H3 tails in vivo. J Biol Chem 2007; 282:15476-83. [PMID: 17403666 DOI: 10.1074/jbc.m610270200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The histone H3 amino-terminal tails play an important role in regulating chromatin transcription. Although the mechanisms by which the H3 tail modulates transcription are not well understood, recent discoveries of specific interactions of regulatory factors with H3 tails suggest that H3 tails are a key player in the precise regulation of transcription activity. To investigate the recruitment-based action of H3 tails in chromatin transcription, we purified H3 tail-associated proteins from HeLa cells that stably express epitope-tagged H3 tails. This approach resulted in the identification of multiple histone methyltransferase activities and transcription regulatory factors that are specifically associated with expressed H3 tail domains. Point mutations of Lys-9 and Lys-27 to block cellular modifications of the tail domains completely abolished the association of specific factors, including HP1 and several repressors. Importantly, our transcription analysis revealed that the purified factors can significantly stimulate p300-mediated transcription from chromatin templates. These results implicate that the H3 tail, when accessible in relaxed chromatin, acts as a transcriptional regulator by mediating recruitment of specific sets of cofactors.
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Affiliation(s)
- Kyu Heo
- Department of Biochemistry and Molecular Biology, University of Southern California/Norris Comprehensive Cancer Center, University of Southern California Keck School of Medicine, Los Angeles, California 90033, USA
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41
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Takezawa S, Yokoyama A, Okada M, Fujiki R, Iriyama A, Yanagi Y, Ito H, Takada I, Kishimoto M, Miyajima A, Takeyama KI, Umesono K, Kitagawa H, Kato S. A cell cycle-dependent co-repressor mediates photoreceptor cell-specific nuclear receptor function. EMBO J 2007; 26:764-74. [PMID: 17255935 PMCID: PMC1794400 DOI: 10.1038/sj.emboj.7601548] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2006] [Accepted: 12/15/2006] [Indexed: 01/30/2023] Open
Abstract
Photoreceptor cell-specific nuclear receptor (PNR) (NR2E3) acts as a sequence-specific repressor that controls neuronal differentiation in the developing retina. We identified a novel PNR co-repressor, Ret-CoR, that is expressed in the developing retina and brain. Biochemical purification of Ret-CoR identified a multiprotein complex that included E2F/Myb-associated proteins, histone deacetylases (HDACs) and NCoR/HDAC complex-related components. Ret-CoR appeared to function as a platform protein for the complex, and interacted with PNR via two CoRNR motifs. Purified Ret-CoR complex exhibited HDAC activity, co-repressed PNR transrepression function in vitro, and co-repressed PNR function in PNR target gene promoters, presumably in the retinal progenitor cells. Notably, the appearance of Ret-CoR protein was cell-cycle-stage-dependent (from G1 to S). Therefore, Ret-CoR appears to act as a component of an HDAC co-repressor complex that supports PNR repression function in the developing retina, and may represent a co-regulator class that supports transcriptional regulator function via cell-cycle-dependent expression.
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Affiliation(s)
- Shinichiro Takezawa
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
- ERATO, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
| | - Atsushi Yokoyama
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Maiko Okada
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Ryoji Fujiki
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Aya Iriyama
- Department of Ophthalmology, University of Tokyo, School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Yasuo Yanagi
- Department of Ophthalmology, University of Tokyo, School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Hiroaki Ito
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Ichiro Takada
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Masahiko Kishimoto
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Atsushi Miyajima
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Ken-ichi Takeyama
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kazuhiko Umesono
- Institute for Virus Research, and Graduate School for Biostudies, Kyoto University, Kyoto, Japan
| | - Hirochika Kitagawa
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Shigeaki Kato
- The Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo, Japan
- ERATO, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
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42
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Barrero MJ, Malik S. Two functional modes of a nuclear receptor-recruited arginine methyltransferase in transcriptional activation. Mol Cell 2006; 24:233-43. [PMID: 17052457 PMCID: PMC1647399 DOI: 10.1016/j.molcel.2006.09.020] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2005] [Revised: 04/07/2006] [Accepted: 09/29/2006] [Indexed: 11/23/2022]
Abstract
Nuclear receptors, like other transcriptional activators, switch on gene transcription by recruiting a complex network of coregulatory proteins. Here, we have identified the arginine methyltransferase PRMT1 as a coactivator for HNF4, an orphan nuclear receptor that regulates the expression of genes involved in diverse metabolic pathways. Remarkably, PRMT1, whose methylation activity on histone H4 strongly correlates with induction of HNF4 target genes in differentiating enterocytes, regulates HNF4 activity through a bipartite mechanism. First, PRMT1 binds and methylates the HNF4 DNA-binding domain (DBD), thereby enhancing the affinity of HNF4 for its binding site. Second, PRMT1 is recruited to the HNF4 ligand-binding domain (LBD) through a mechanism that involves the p160 family of coactivators and methylates histone H4 at arginine 3. This, together with recruitment of the histone acetyltransferase p300, leads to nucleosomal alterations and subsequent RNA polymerase II preinitiation complex formation.
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Affiliation(s)
| | - Sohail Malik
- *Correspondence: Tel. (212) 327-7623 FAX (212) 327-7949
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43
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Park JH, Roeder RG. GAS41 is required for repression of the p53 tumor suppressor pathway during normal cellular proliferation. Mol Cell Biol 2006; 26:4006-16. [PMID: 16705155 PMCID: PMC1489109 DOI: 10.1128/mcb.02185-05] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
GAS41 is a common subunit of the TIP60 and SRCAP complexes and is essential for cell growth and viability. Here, we report that GAS41 is required for repression of the p53 tumor suppressor pathway during normal cellular proliferation. Either GAS41 small interfering RNA-mediated knockdown of GAS41 expression or specific interruptions of the carboxy-terminal coiled-coil motif of the GAS41 protein activate the p53 tumor suppressor pathway, as evidenced by p53 up-regulation, p53 serine-15 phosphorylation, and p21 transcriptional activation. Activation of the p53 pathway does not result from changes in TIP60 complex assembly or TIP60 coactivator functions for p53, since a TIP60 complex containing a coiled-coil mutant of GAS41 retains the same composition and histone acetyltransferase activity as its wild-type counterpart and since mutant GAS41 does not compromise ectopic p53-dependent transcriptional activation in a reporter gene assay. Finally, we demonstrate that GAS41 is prebound to the promoters of two p53 tumor suppressor pathway genes (p21 and p14ARF) in normal unstressed cells but is dissociated from both promoters in response to stress signals that activate p53. Our data suggest that GAS41 plays a role in repressing the p53 tumor suppressor pathway during the normal cell cycle by a TIP60-independent mechanism.
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Affiliation(s)
- Jeong Hyeon Park
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10021, USA
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44
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Fischle W. In nucleo enzymatic assays for the identification and characterization of histone modifying activities. Methods 2005; 36:362-7. [PMID: 16085425 DOI: 10.1016/j.ymeth.2005.03.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2005] [Indexed: 10/25/2022] Open
Abstract
The impact of histone phosphorylation, acetylation, and methylation onto transcription and various other cellular DNA-mediated processes is now well established. Numerous histone modification marks, specific sites carrying particular post-translational modifications, have been described and analyzed in detail. Whereas, many methods for the study of histone post-translational modifications involve sophisticated equipment and techniques, we describe the revival of a very simple procedure for the analysis of histone modifications and histone modifying enzymes, which is derived from experiments first carried out several decades ago. This method is based on the isolation of cell nuclei containing intact chromatin structures that are then incubated with defined enzymatic substrates of histone modifying enzymes. We provide quick protocols for the isolation of nuclei from yeast and mammalian cells and give basic procedures for the phosphorylation, acetylation, and methylation of histones (and other proteins) using these subcellular sources that can be carried out in any laboratory. Simple methods for the analysis of histone modifications using these assays are discussed.
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Affiliation(s)
- Wolfgang Fischle
- Laboratory of Chromatin Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.
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45
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Dou Y, Milne TA, Tackett AJ, Smith ER, Fukuda A, Wysocka J, Allis CD, Chait BT, Hess JL, Roeder RG. Physical association and coordinate function of the H3 K4 methyltransferase MLL1 and the H4 K16 acetyltransferase MOF. Cell 2005; 121:873-85. [PMID: 15960975 DOI: 10.1016/j.cell.2005.04.031] [Citation(s) in RCA: 516] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Revised: 03/25/2005] [Accepted: 04/28/2005] [Indexed: 12/27/2022]
Abstract
A stable complex containing MLL1 and MOF has been immunoaffinity purified from a human cell line that stably expresses an epitope-tagged WDR5 subunit. Stable interactions between MLL1 and MOF were confirmed by reciprocal immunoprecipitation, cosedimentation, and cotransfection analyses, and interaction sites were mapped to MLL1 C-terminal and MOF zinc finger domains. The purified complex has a robust MLL1-mediated histone methyltransferase activity that can effect mono-, di-, and trimethylation of H3 K4 and a MOF-mediated histone acetyltransferase activity that is specific for H4 K16. Importantly, both activities are required for optimal transcription activation on a chromatin template in vitro and on an endogenous MLL1 target gene, Hox a9, in vivo. These results indicate an activator-based mechanism for joint MLL1 and MOF recruitment and targeted methylation and acetylation and provide a molecular explanation for the closely correlated distribution of H3 K4 methylation and H4 K16 acetylation on active genes.
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Affiliation(s)
- Yali Dou
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, New York 10021, USA
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46
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Gao C, Wang L, Milgrom E, Shen WCW. On the mechanism of constitutive Pdr1 activator-mediated PDR5 transcription in Saccharomyces cerevisiae: evidence for enhanced recruitment of coactivators and altered nucleosome structures. J Biol Chem 2004; 279:42677-86. [PMID: 15294907 DOI: 10.1074/jbc.m406363200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Drug resistance as a result of overexpression of drug transporter genes presents a major obstacle in the treatment of cancers and infections. The molecular mechanisms underlying transcriptional up-regulation of drug transporter genes remains elusive. Employing Saccharomyces cerevisiae as a model, we analyzed here transcriptional regulation of the drug transporter gene PDR5 in a drug-resistant pdr1-3 strain. This mutant bears a gain-of-function mutation in PDR1, which encodes a transcriptional activator for PDR5. Similar to the well studied model gene GAL1, we provide evidence showing that PDR5 belongs to a group of genes whose transcription requires the Spt-Ada-Gcn5 acetyltransferase (SAGA) complex. We also show that the drugindependent PDR5 transcription is associated with enhanced promoter occupancy of coactivator complexes, including SAGA, Mediator, chromatin remodeling SWI/SNF complex, and TATA-binding protein. Analyzed by chromatin immunoprecipitations, loss of contacts between histones and DNA occurs at both promoter and coding sequences of PDR5. Consistently, micrococcal nuclease susceptibility analysis revealed altered chromatin structure at the promoter and coding sequences of PDR5. Our data provide molecular description of the changes associated with constitutive PDR5 transcription, and reveal the molecular mechanism underlying drug-independent transcriptional up-regulation of PDR5.
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Affiliation(s)
- Chen Gao
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, Syracuse, New York 13210, USA
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47
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An W, Kim J, Roeder RG. Ordered cooperative functions of PRMT1, p300, and CARM1 in transcriptional activation by p53. Cell 2004; 117:735-48. [PMID: 15186775 DOI: 10.1016/j.cell.2004.05.009] [Citation(s) in RCA: 402] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2003] [Revised: 04/19/2004] [Accepted: 04/20/2004] [Indexed: 12/31/2022]
Abstract
Transcriptional coactivators that modify histones represent an increasingly important group of regulatory factors, although their ability to modify other factors as well precludes common assumptions that they necessarily act by histone modification. In an extension of previous studies showing a role for acetyltransferase p300/CBP in p53 function, we have used systems reconstituted with recombinant chromatin templates and (co)activators to demonstrate (1) the additional involvement of protein arginine methyltransferases PRMT1 and CARM1 in p53 function; (2) both independent and ordered cooperative functions of p300, PRMT1, and CARM1; and (3) mechanisms that involve direct interactions with p53 and, most importantly, obligatory modifications of corresponding histone substrates. ChIP analyses have confirmed the ordered accumulation of these (and other) coactivators and cognate histone modifications on the GADD45 gene following ectopic p53 expression and/or UV irradiation. These studies thus define diverse cofactor functions, as well as underlying mechanisms involving distinct histone modifications, in p53-dependent gene activation.
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Affiliation(s)
- Woojin An
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10021, USA
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