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Trainor N, Whitwell HJ, Jiménez B, Addison K, Leonidou E, DiMaggio PA, Fuchter MJ. Tracking DOT1L methyltransferase activity by stable isotope labelling using a selective synthetic co-factor. Commun Chem 2024; 7:145. [PMID: 38937590 PMCID: PMC11211345 DOI: 10.1038/s42004-024-01227-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 06/18/2024] [Indexed: 06/29/2024] Open
Abstract
Epigenetic processes influence health and disease through mechanisms which alter gene expression. In contrast to genetic changes which affect DNA sequences, epigenetic marks include DNA base modifications or post-translational modification (PTM) of proteins. Histone methylation is a prominent and versatile example of an epigenetic marker: gene expression or silencing is dependent on the location and extent of the methylation. Protein methyltransferases exhibit functional redundancy and broad preferences for multiple histone residues, which presents a challenge for the study of their individual activities. We developed an isotopically labelled analogue of co-factor S-adenosyl-L-methionine (13CD3-BrSAM), with selectivity for the histone lysine methyltransferase DOT1L, permitting tracking of methylation activity by mass spectrometry (MS). This concept could be applied to other methyltransferases, linking PTM discovery to enzymatic mediators.
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Affiliation(s)
- Nicole Trainor
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London, W12 OBZ, UK
| | - Harry J Whitwell
- National Phenome Centre and Imperial Clinical Phenotyping Centre, Department of Metabolism, Digestion and Reproduction, IRDB, Building Imperial College London, London, W12 ONN, UK
- Section of Bioanalytical Chemistry, Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Sir Alexander Fleming Building, Imperial College London, London, SW7 2AZ, UK
| | - Beatriz Jiménez
- National Phenome Centre and Imperial Clinical Phenotyping Centre, Department of Metabolism, Digestion and Reproduction, IRDB, Building Imperial College London, London, W12 ONN, UK
- Section of Bioanalytical Chemistry, Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Sir Alexander Fleming Building, Imperial College London, London, SW7 2AZ, UK
| | - Katie Addison
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London, W12 OBZ, UK
| | - Emily Leonidou
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London, W12 OBZ, UK
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Peter A DiMaggio
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Matthew J Fuchter
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London, W12 OBZ, UK.
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2
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Hassanie H, Penteado AB, de Almeida LC, Calil RL, da Silva Emery F, Costa-Lotufo LV, Trossini GHG. SETDB1 as a cancer target: challenges and perspectives in drug design. RSC Med Chem 2024; 15:1424-1451. [PMID: 38799223 PMCID: PMC11113007 DOI: 10.1039/d3md00366c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 03/16/2024] [Indexed: 05/29/2024] Open
Abstract
Genome stability is governed by chromatin structural dynamics, which modify DNA accessibility under the influence of intra- and inter-nucleosomal contacts, histone post-translational modifications (PTMs) and variations, besides the activity of ATP-dependent chromatin remodelers. These are the main ways by which chromatin dynamics are regulated and connected to nuclear processes, which when dysregulated can frequently be associated with most malignancies. Recently, functional crosstalk between histone modifications and chromatin remodeling has emerged as a critical regulatory method of transcriptional regulation during cell destiny choice. Therefore, improving therapeutic outcomes for patients by focusing on epigenetic targets dysregulated in malignancies should help prevent cancer cells from developing resistance to anticancer treatments. For this reason, SET domain bifurcated histone lysine methyltransferase 1 (SETDB1) has gained a lot of attention recently as a cancer target. SETDB1 is a histone lysine methyltransferase that plays an important role in marking euchromatic and heterochromatic regions. Hence, it promotes the silencing of tumor suppressor genes and contributes to carcinogenesis. Some studies revealed that SETDB1 was overexpressed in various human cancer types, which enhanced tumor growth and metastasis. Thus, SETDB1 appears to be an attractive epigenetic target for new cancer treatments. In this review, we have discussed the effects of its overexpression on the progression of tumors and the development of inhibitor drugs that specifically target this enzyme.
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Affiliation(s)
- Haifa Hassanie
- School of Pharmaceutical Sciences, University of São Paulo Brazil
| | | | | | | | - Flávio da Silva Emery
- School of Pharmaceutical Sciences of the Ribeirão Preto, University of São Paulo Brazil
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3
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Vergara-Cruces Á, Pramanick I, Pearce D, Vogirala VK, Byrne MJ, Low JKK, Webster MW. Structure of the plant plastid-encoded RNA polymerase. Cell 2024; 187:1145-1159.e21. [PMID: 38428394 DOI: 10.1016/j.cell.2024.01.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/18/2023] [Accepted: 01/24/2024] [Indexed: 03/03/2024]
Abstract
Chloroplast genes encoding photosynthesis-associated proteins are predominantly transcribed by the plastid-encoded RNA polymerase (PEP). PEP is a multi-subunit complex composed of plastid-encoded subunits similar to bacterial RNA polymerases (RNAPs) stably bound to a set of nuclear-encoded PEP-associated proteins (PAPs). PAPs are essential to PEP activity and chloroplast biogenesis, but their roles are poorly defined. Here, we present cryoelectron microscopy (cryo-EM) structures of native 21-subunit PEP and a PEP transcription elongation complex from white mustard (Sinapis alba). We identify that PAPs encase the core polymerase, forming extensive interactions that likely promote complex assembly and stability. During elongation, PAPs interact with DNA downstream of the transcription bubble and with the nascent mRNA. The models reveal details of the superoxide dismutase, lysine methyltransferase, thioredoxin, and amino acid ligase enzymes that are subunits of PEP. Collectively, these data provide a foundation for the mechanistic understanding of chloroplast transcription and its role in plant growth and adaptation.
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Affiliation(s)
- Ángel Vergara-Cruces
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK
| | - Ishika Pramanick
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK
| | - David Pearce
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK; School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Vinod K Vogirala
- Electron Bio-Imaging Centre (eBIC), Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Matthew J Byrne
- Electron Bio-Imaging Centre (eBIC), Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Jason K K Low
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2050, Australia
| | - Michael W Webster
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.
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4
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Schnee P, Pleiss J, Jeltsch A. Approaching the catalytic mechanism of protein lysine methyltransferases by biochemical and simulation techniques. Crit Rev Biochem Mol Biol 2024; 59:20-68. [PMID: 38449437 DOI: 10.1080/10409238.2024.2318547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/10/2024] [Indexed: 03/08/2024]
Abstract
Protein lysine methyltransferases (PKMTs) transfer up to three methyl groups to the side chains of lysine residues in proteins and fulfill important regulatory functions by controlling protein stability, localization and protein/protein interactions. The methylation reactions are highly regulated, and aberrant methylation of proteins is associated with several types of diseases including neurologic disorders, cardiovascular diseases, and various types of cancer. This review describes novel insights into the catalytic machinery of various PKMTs achieved by the combined application of biochemical experiments and simulation approaches during the last years, focusing on clinically relevant and well-studied enzymes of this group like DOT1L, SMYD1-3, SET7/9, G9a/GLP, SETD2, SUV420H2, NSD1/2, different MLLs and EZH2. Biochemical experiments have unraveled many mechanistic features of PKMTs concerning their substrate and product specificity, processivity and the effects of somatic mutations observed in PKMTs in cancer cells. Structural data additionally provided information about the substrate recognition, enzyme-substrate complex formation, and allowed for simulations of the substrate peptide interaction and mechanism of PKMTs with atomistic resolution by molecular dynamics and hybrid quantum mechanics/molecular mechanics methods. These simulation technologies uncovered important mechanistic details of the PKMT reaction mechanism including the processes responsible for the deprotonation of the target lysine residue, essential conformational changes of the PKMT upon substrate binding, but also rationalized regulatory principles like PKMT autoinhibition. Further developments are discussed that could bring us closer to a mechanistic understanding of catalysis of this important class of enzymes in the near future. The results described here illustrate the power of the investigation of enzyme mechanisms by the combined application of biochemical experiments and simulation technologies.
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Affiliation(s)
- Philipp Schnee
- Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Stuttgart, Germany
| | - Jürgen Pleiss
- Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Stuttgart, Germany
| | - Albert Jeltsch
- Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Stuttgart, Germany
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5
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Koryakov DE. Diversity and functional specialization of H3K9-specific histone methyltransferases. Bioessays 2024; 46:e2300163. [PMID: 38058121 DOI: 10.1002/bies.202300163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/16/2023] [Accepted: 11/20/2023] [Indexed: 12/08/2023]
Abstract
Histone modifications play a critical role in the control over activities of the eukaryotic genome; among these chemical alterations, the methylation of lysine K9 in histone H3 (H3K9) is one of the most extensively studied. The number of enzymes capable of methylating H3K9 varies greatly across different organisms: in fission yeast, only one such methyltransferase is present, whereas in mammals, 10 are known. If there are several such enzymes, each of them must have some specific function, and they can interact with one another. Thus arises a complex system of interchangeability, "division of labor," and contacts with each other and with diverse proteins. Histone methyltransferases specialize in the number of methyl groups that they attach and have different intracellular localizations as well as different distributions on chromosomes. Each also shows distinct binding to different types of sequences and has a specific set of nonhistone substrates.
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Affiliation(s)
- Dmitry E Koryakov
- Lab of Molecular Cytogenetics, Institute of Molecular and Cellular Biology, Novosibirsk, Russia
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6
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Poudel PB, Dhakal D, Lee JC, Sohng JK. Functional characterization of a naphthalene-O-methyltransferase from Nocardia sp. CS682. Enzyme Microb Technol 2024; 172:110351. [PMID: 37939423 DOI: 10.1016/j.enzmictec.2023.110351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/10/2023]
Abstract
Methylation plays important roles in biosynthesis, metabolism, signal transduction, detoxification, protein sorting and repair, and nucleic acid processing. Generally the methyltransferases transfer methyl groups in various natural products using S-adenosyl methionine (SAM) as a cofactor. In this study, we examined and functionally characterized ThnM3 (enzyme), by testing various substrates with different chemical structures. Among the tested substrates, 1,8-dihydroxynaphthalene was the best substrate for methylation. Whole-cell biotransformation was performed using the enzyme in engineered Escherichia coli to produce 8-methoxynaphthalene-1-ol, and 1,8-dimethoxynaphthalene derivatives of 1,8-dihydroxynaphthalene. The products were confirmed using high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance spectroscopic analyses. Therefore, this study is the first to amplify, express the thnM3 (gene), and functionally characterize theThnM3, which exhibits the regioselective modifications of 1,8-dihydroxynaphthalene.
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Affiliation(s)
- Purna Bahadur Poudel
- Institute of Biomolecule Reconstruction (iBR), Department of Life Science and Biochemical Engineering, Sun Moon University, 70 Sun Moon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, South Korea
| | - Dipesh Dhakal
- Institute of Biomolecule Reconstruction (iBR), Department of Life Science and Biochemical Engineering, Sun Moon University, 70 Sun Moon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, South Korea
| | - Jong Cheol Lee
- Department of Pharmaceutical Engineering and Biotechnology, Sun Moon University, 70 Sunmoon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, South Korea
| | - Jae Kyung Sohng
- Institute of Biomolecule Reconstruction (iBR), Department of Life Science and Biochemical Engineering, Sun Moon University, 70 Sun Moon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, South Korea; Department of Pharmaceutical Engineering and Biotechnology, Sun Moon University, 70 Sunmoon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, South Korea.
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7
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Aziz N, Hong YH, Kim HG, Kim JH, Cho JY. Tumor-suppressive functions of protein lysine methyltransferases. Exp Mol Med 2023; 55:2475-2497. [PMID: 38036730 PMCID: PMC10766653 DOI: 10.1038/s12276-023-01117-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/30/2023] [Accepted: 09/05/2023] [Indexed: 12/02/2023] Open
Abstract
Protein lysine methyltransferases (PKMTs) play crucial roles in histone and nonhistone modifications, and their dysregulation has been linked to the development and progression of cancer. While the majority of studies have focused on the oncogenic functions of PKMTs, extensive evidence has indicated that these enzymes also play roles in tumor suppression by regulating the stability of p53 and β-catenin, promoting α-tubulin-mediated genomic stability, and regulating the transcription of oncogenes and tumor suppressors. Despite their contradictory roles in tumorigenesis, many PKMTs have been identified as potential therapeutic targets for cancer treatment. However, PKMT inhibitors may have unintended negative effects depending on the specific cancer type and target enzyme. Therefore, this review aims to comprehensively summarize the tumor-suppressive effects of PKMTs and to provide new insights into the development of anticancer drugs targeting PKMTs.
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Affiliation(s)
- Nur Aziz
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Yo Han Hong
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Han Gyung Kim
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
| | - Ji Hye Kim
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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8
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Jorge SD, Chi YI, Mazaba JL, Haque N, Wagenknecht J, Smith BC, Volkman BF, Mathison AJ, Lomberk G, Zimmermann MT, Urrutia R. Deep computational phenotyping of genomic variants impacting the SET domain of KMT2C reveal molecular mechanisms for their dysfunction. Front Genet 2023; 14:1291307. [PMID: 38090150 PMCID: PMC10715303 DOI: 10.3389/fgene.2023.1291307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/17/2023] [Indexed: 12/29/2023] Open
Abstract
Introduction: Kleefstra Syndrome type 2 (KLEFS-2) is a genetic, neurodevelopmental disorder characterized by intellectual disability, infantile hypotonia, severe expressive language delay, and characteristic facial appearance, with a spectrum of other distinct clinical manifestations. Pathogenic mutations in the epigenetic modifier type 2 lysine methyltransferase KMT2C have been identified to be causative in KLEFS-2 individuals. Methods: This work reports a translational genomic study that applies a multidimensional computational approach for deep variant phenotyping, combining conventional genomic analyses, advanced protein bioinformatics, computational biophysics, biochemistry, and biostatistics-based modeling. We use standard variant annotation, paralog annotation analyses, molecular mechanics, and molecular dynamics simulations to evaluate damaging scores and provide potential mechanisms underlying KMT2C variant dysfunction. Results: We integrated data derived from the structure and dynamics of KMT2C to classify variants into SV (Structural Variant), DV (Dynamic Variant), SDV (Structural and Dynamic Variant), and VUS (Variant of Uncertain Significance). When compared with controls, these variants show values reflecting alterations in molecular fitness in both structure and dynamics. Discussion: We demonstrate that our 3D models for KMT2C variants suggest distinct mechanisms that lead to their imbalance and are not predictable from sequence alone. Thus, the missense variants studied here cause destabilizing effects on KMT2C function by different biophysical and biochemical mechanisms which we adeptly describe. This new knowledge extends our understanding of how variations in the KMT2C gene cause the dysfunction of its methyltransferase enzyme product, thereby bearing significant biomedical relevance for carriers of KLEFS2-associated genomic mutations.
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Affiliation(s)
- Salomão Dória Jorge
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Young-In Chi
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Division of Research, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jose Lizarraga Mazaba
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Neshatul Haque
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jessica Wagenknecht
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Brian C. Smith
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Brian F. Volkman
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Angela J. Mathison
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Division of Research, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Gwen Lomberk
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Division of Research, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Michael T. Zimmermann
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
- Clinical and Translational Sciences Institute, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Raul Urrutia
- Linda T. and John A. Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
- Division of Research, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
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9
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Talukdar PD, Chatterji U. Transcriptional co-activators: emerging roles in signaling pathways and potential therapeutic targets for diseases. Signal Transduct Target Ther 2023; 8:427. [PMID: 37953273 PMCID: PMC10641101 DOI: 10.1038/s41392-023-01651-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/27/2023] [Accepted: 09/10/2023] [Indexed: 11/14/2023] Open
Abstract
Specific cell states in metazoans are established by the symphony of gene expression programs that necessitate intricate synergic interactions between transcription factors and the co-activators. Deregulation of these regulatory molecules is associated with cell state transitions, which in turn is accountable for diverse maladies, including developmental disorders, metabolic disorders, and most significantly, cancer. A decade back most transcription factors, the key enablers of disease development, were historically viewed as 'undruggable'; however, in the intervening years, a wealth of literature validated that they can be targeted indirectly through transcriptional co-activators, their confederates in various physiological and molecular processes. These co-activators, along with transcription factors, have the ability to initiate and modulate transcription of diverse genes necessary for normal physiological functions, whereby, deregulation of such interactions may foster tissue-specific disease phenotype. Hence, it is essential to analyze how these co-activators modulate specific multilateral processes in coordination with other factors. The proposed review attempts to elaborate an in-depth account of the transcription co-activators, their involvement in transcription regulation, and context-specific contributions to pathophysiological conditions. This review also addresses an issue that has not been dealt with in a comprehensive manner and hopes to direct attention towards future research that will encompass patient-friendly therapeutic strategies, where drugs targeting co-activators will have enhanced benefits and reduced side effects. Additional insights into currently available therapeutic interventions and the associated constraints will eventually reveal multitudes of advanced therapeutic targets aiming for disease amelioration and good patient prognosis.
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Affiliation(s)
- Priyanka Dey Talukdar
- Cancer Research Laboratory, Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Urmi Chatterji
- Cancer Research Laboratory, Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India.
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10
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Rolando M, Wah Chung IY, Xu C, Gomez-Valero L, England P, Cygler M, Buchrieser C. The SET and ankyrin domains of the secreted Legionella pneumophila histone methyltransferase work together to modify host chromatin. mBio 2023; 14:e0165523. [PMID: 37795993 PMCID: PMC10653858 DOI: 10.1128/mbio.01655-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/22/2023] [Indexed: 10/06/2023] Open
Abstract
IMPORTANCE Legionella pneumophila is an intracellular bacterium responsible of Legionnaires' disease, a severe pneumonia that is often fatal when not treated promptly. The pathogen's ability to efficiently colonize the host resides in its ability to replicate intracellularly. Essential for intracellular replication is translocation of many different protein effectors via a specialized secretion system. One of them, called RomA, binds and directly modifies the host chromatin at a unique site (tri-methylation of lysine 14 of histone H3 [H3K14me]). However, the molecular mechanisms of binding are not known. Here, we resolve this question through structural characterization of RomA together with the H3 peptide. We specifically reveal an active role of the ankyrin repeats located in its C-terminal in the interaction with the histone H3 tail. Indeed, without the ankyrin domains, RomA loses its ability to act as histone methyltransferase. These results discover the molecular mechanisms by which a bacterial histone methyltransferase that is conserved in L. pneumophila strains acts to modify chromatin.
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Affiliation(s)
- Monica Rolando
- Institut Pasteur, Université de Paris, Biologie des Bactéries Intracellulaires, Paris, France
| | - Ivy Yeuk Wah Chung
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Caishuang Xu
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Laura Gomez-Valero
- Institut Pasteur, Université de Paris, Biologie des Bactéries Intracellulaires, Paris, France
| | - Patrick England
- Institut Pasteur, Université de Paris, Plateforme de Biophysique Moléculaire, Paris, France
| | - Miroslaw Cygler
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Carmen Buchrieser
- Institut Pasteur, Université de Paris, Biologie des Bactéries Intracellulaires, Paris, France
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11
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Pei MS, Liu HN, Wei TL, Guo DL. Proteome-Wide Identification of Non-histone Lysine Methylation during Grape Berry Ripening. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:12140-12152. [PMID: 37503871 DOI: 10.1021/acs.jafc.3c03144] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
To gain a comprehensive understanding of non-histone methylation during berry ripening in grape (Vitis vinifera L.), the methylation of non-histone lysine residues was studied using a 4D label-free quantitative proteomics approach. In total, 822 methylation sites in 416 methylated proteins were identified, with xxExxx_K_xxxxxx as the conserved motif. Functional annotation of non-histone proteins with methylated lysine residues indicated that these proteins were mostly associated with "ripening and senescence", "energy metabolism", "oxidation-reduction process", and "stimulus response". Most of the genes encoding proteins subjected to methylation during grape berry ripening showed a significant increase in expression during maturation at least at one developmental stage. The correlation of methylated proteins with QTLs, SNPs, and selective regions associated with fruit quality and development was also investigated. This study reports the first proteomic analysis of non-histone lysine methylation in grape berry and indicates that non-histone methylation plays an important role in grape berry ripening.
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Affiliation(s)
- Mao-Song Pei
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471023 Henan Province, China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang 471023, China
| | - Hai-Nan Liu
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471023 Henan Province, China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang 471023, China
| | - Tong-Lu Wei
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471023 Henan Province, China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang 471023, China
| | - Da-Long Guo
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471023 Henan Province, China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang 471023, China
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12
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Parallel functional annotation of cancer-associated missense mutations in histone methyltransferases. Sci Rep 2022; 12:18487. [PMID: 36323913 PMCID: PMC9630446 DOI: 10.1038/s41598-022-23229-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 10/27/2022] [Indexed: 12/03/2022] Open
Abstract
Using exome sequencing for biomarker discovery and precision medicine requires connecting nucleotide-level variation with functional changes in encoded proteins. However, for functionally annotating the thousands of cancer-associated missense mutations, or variants of uncertain significance (VUS), purifying variant proteins for biochemical and functional analysis is cost-prohibitive and inefficient. We describe parallel functional annotation (PFA) of large numbers of VUS using small cultures and crude extracts in 96-well plates. Using members of a histone methyltransferase family, we demonstrate high-throughput structural and functional annotation of cancer-associated mutations. By combining functional annotation of paralogs, we discovered two phylogenetic and clustering parameters that improve the accuracy of sequence-based functional predictions to over 90%. Our results demonstrate the value of PFA for defining oncogenic/tumor suppressor functions of histone methyltransferases as well as enhancing the accuracy of sequence-based algorithms in predicting the effects of cancer-associated mutations.
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13
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Nguyen TQ, Nicolet Y. Structure and Catalytic Mechanism of Radical SAM Methylases. Life (Basel) 2022; 12:1732. [PMID: 36362886 PMCID: PMC9692996 DOI: 10.3390/life12111732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 08/14/2023] Open
Abstract
Methyl transfer is essential in myriad biological pathways found across all domains of life. Unlike conventional methyltransferases that catalyze this reaction through nucleophilic substitution, many members of the radical S-adenosyl-L-methionine (SAM) enzyme superfamily use radical-based chemistry to methylate unreactive carbon centers. These radical SAM methylases reductively cleave SAM to generate a highly reactive 5'-deoxyadenosyl radical, which initiates a broad range of transformations. Recently, crystal structures of several radical SAM methylases have been determined, shedding light on the unprecedented catalytic mechanisms used by these enzymes to overcome the substantial activation energy barrier of weakly nucleophilic substrates. Here, we review some of the discoveries on this topic over the last decade, focusing on enzymes for which three-dimensional structures are available to identify the key players in the mechanisms, highlighting the dual function of SAM as a methyl donor and a 5'-deoxyadenosyl radical or deprotonating base source. We also describe the role of the protein matrix in orchestrating the reaction through different strategies to catalyze such challenging methylations.
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Affiliation(s)
| | - Yvain Nicolet
- Metalloproteins Unit, Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
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14
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Esquivel-Chávez A, Maki T, Tsubouchi H, Handa T, Kimura H, Haber JE, Thon G, Iwasaki H. Euchromatin factors HULC and Set1C affect heterochromatin organization and mating-type switching in fission yeast Schizosaccharomyces pombe. Genes Genet Syst 2022; 97:123-138. [PMID: 35908934 DOI: 10.1266/ggs.22-00012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Mating-type (P or M) of fission yeast Schizosaccharomyces pombe is determined by the transcriptionally active mat1 cassette and is switched by gene conversion using a donor, either mat2 or mat3, located in an adjacent heterochromatin region (mating-type switching; MTS). In the switching process, heterochromatic donors of genetic information are selected based on the P or M cell type and on the action of two recombination enhancers, SRE2 promoting the use of mat2-P and SRE3 promoting the use of mat3-M, leading to replacement of the content of the expressed mat1 cassette. Recently, we found that the histone H3K4 methyltransferase complex Set1C participates in donor selection, raising the question of how a complex best known for its effects in euchromatin controls recombination in heterochromatin. Here, we report that the histone H2BK119 ubiquitin ligase complex HULC functions with Set1C in MTS, as mutants in the shf1, brl1, brl2 and rad6 genes showed defects similar to Set1C mutants and belonged to the same epistasis group as set1Δ. Moreover, using H3K4R and H2BK119R histone mutants and a Set1-Y897A catalytic mutant, we found that ubiquitylation of histone H2BK119 by HULC and methylation of histone H3K4 by Set1C are functionally coupled in MTS. Cell-type biases in MTS in these mutants suggested that HULC and Set1C inhibit the use of the SRE3 recombination enhancer in M cells, thus favoring SRE2 and mat2-P. Consistent with this, imbalanced switching in the mutants was traced to compromised association of the directionality factor Swi6 with the recombination enhancers in M cells. Based on their known effects at other chromosomal locations, we speculate that HULC and Set1C control nucleosome mobility and strand invasion near the SRE elements. In addition, we uncovered distinct effects of HULC and Set1C on histone H3K9 methylation and gene silencing, consistent with additional functions in the heterochromatic domain.
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Affiliation(s)
- Alfredo Esquivel-Chávez
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
- Institute of Innovative Research, Tokyo Institute of Technology
| | - Takahisa Maki
- Institute of Innovative Research, Tokyo Institute of Technology
| | - Hideo Tsubouchi
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
- Institute of Innovative Research, Tokyo Institute of Technology
| | - Testuya Handa
- Institute of Innovative Research, Tokyo Institute of Technology
| | - Hiroshi Kimura
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
- Institute of Innovative Research, Tokyo Institute of Technology
| | - James E Haber
- Department of Biology and Rosenstiel Basic Medical Sciences Research Center, Brandeis University
| | | | - Hiroshi Iwasaki
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
- Institute of Innovative Research, Tokyo Institute of Technology
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15
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Chemical biology and pharmacology of histone lysine methylation inhibitors. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2022; 1865:194840. [PMID: 35753676 DOI: 10.1016/j.bbagrm.2022.194840] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/13/2022] [Accepted: 06/15/2022] [Indexed: 12/20/2022]
Abstract
Histone lysine methylation is a post-translational modification that plays a key role in the epigenetic regulation of a broad spectrum of biological processes. Moreover, the dysregulation of histone lysine methyltransferases (KMTs) has been implicated in the pathogenesis of several diseases particularly cancer. Due to their pathobiological importance, KMTs have garnered immense attention over the last decade as attractive therapeutic targets. These endeavors have culminated in tens of chemical probes that have been used to interrogate many aspects of histone lysine methylation. Besides, over a dozen inhibitors have been advanced to clinical trials, including the EZH2 inhibitor tazemetostat approved for the treatment of follicular lymphoma and advanced epithelioid sarcoma. In this Review, we highlight the chemical biology and pharmacology of KMT inhibitors and targeted protein degraders focusing on the clinical development of EZH1/2, DOT1L, Menin-MLL, and WDR5-MLL inhibitors. We also briefly discuss the pharmacologic targeting of other KMTs.
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16
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Abdelraheem E, Thair B, Varela RF, Jockmann E, Popadić D, Hailes HC, Ward JM, Iribarren AM, Lewkowicz ES, Andexer JN, Hagedoorn PL, Hanefeld U. Methyltransferases, functions and applications. Chembiochem 2022; 23:e202200212. [PMID: 35691829 PMCID: PMC9539859 DOI: 10.1002/cbic.202200212] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/10/2022] [Indexed: 11/25/2022]
Abstract
In this review the current state‐of‐the‐art of S‐adenosylmethionine (SAM)‐dependent methyltransferases and SAM are evaluated. Their structural classification and diversity is introduced and key mechanistic aspects presented which are then detailed further. Then, catalytic SAM as a target for drugs, and approaches to utilise SAM as a cofactor in synthesis are introduced with different supply and regeneration approaches evaluated. The use of SAM analogues are also described. Finally O‐, N‐, C‐ and S‐MTs, their synthetic applications and potential for compound diversification is given.
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Affiliation(s)
| | - Benjamin Thair
- University College London Faculty of Mathematical and Physical Sciences, department of Chemistry, UNITED KINGDOM
| | - Romina Fernández Varela
- Universidad nacional di Quilmes, 3Laboratorio de Biotransformaciones y Química de Ácidos Nucleicos, ARGENTINA
| | - Emely Jockmann
- Albert-Ludwigs-Universitat Freiburg Universitatsbibliothek Freiburg, Pharmacie, GERMANY
| | | | - Helen C Hailes
- University College London Faculty of Mathematical and Physical Sciences, department of Chemistry, UNITED KINGDOM
| | - John M Ward
- University College London, Department of Biochemical Engineering, UNITED KINGDOM
| | - Adolfo M Iribarren
- Universidad Nacional de Quilmes, 3Laboratorio de Biotransformaciones y Química de Ácidos Nucleicos, ARGENTINA
| | - Elizabeth S Lewkowicz
- Universidad Nacional de Quilmes, Laboratorio de Biotransformaciones y Química de Ácidos Nucleicos, ARGENTINA
| | | | | | - Ulf Hanefeld
- Technische Universiteit Delft, Gebouw voor Scheikunde, Julianalaan 136, 2628 BL, Delft, NETHERLANDS
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17
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Ang GCK, Gupta A, Surana U, Yap SXL, Taneja R. Potential Therapeutics Targeting Upstream Regulators and Interactors of EHMT1/2. Cancers (Basel) 2022; 14:cancers14122855. [PMID: 35740522 PMCID: PMC9221123 DOI: 10.3390/cancers14122855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/07/2022] [Accepted: 06/07/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary The expression of Euchromatin histone lysine methyltransferase 1 and 2 (EHMT1/2) is deregulated in many cancers. Most studies thus far have focused on the downstream targets and pathways regulated by EHMTs. However, the mechanisms that lead to their deregulated expression, and the interacting proteins that could impact EHMT activity are not well understood. In this review, we summarize our current understanding of the upstream regulators and the interactors that provide alternative therapeutic approaches to tackle EHMT driven malignancies. Abstract Euchromatin histone lysine methyltransferases (EHMTs) are epigenetic regulators responsible for silencing gene transcription by catalyzing H3K9 dimethylation. Dysregulation of EHMT1/2 has been reported in multiple cancers and is associated with poor clinical outcomes. Although substantial insights have been gleaned into the downstream targets and pathways regulated by EHMT1/2, few studies have uncovered mechanisms responsible for their dysregulated expression. Moreover, EHMT1/2 interacting partners, which can influence their function and, therefore, the expression of target genes, have not been extensively explored. As none of the currently available EHMT inhibitors have made it past clinical trials, understanding upstream regulators and EHMT protein complexes may provide unique insights into novel therapeutic avenues in EHMT-overexpressing cancers. Here, we review our current understanding of the regulators and interacting partners of EHMTs. We also discuss available therapeutic drugs that target the upstream regulators and binding partners of EHMTs and could potentially modulate EHMT function in cancer progression.
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Affiliation(s)
- Gareth Chin Khye Ang
- Healthy Longevity Translational Research Program, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (G.C.K.A.); (A.G.)
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore;
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research A*STAR, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Amogh Gupta
- Healthy Longevity Translational Research Program, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (G.C.K.A.); (A.G.)
| | - Uttam Surana
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore;
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research A*STAR, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Shirlyn Xue Ling Yap
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore;
| | - Reshma Taneja
- Healthy Longevity Translational Research Program, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (G.C.K.A.); (A.G.)
- Correspondence: ; Tel.: +65-(65)-153-236; Fax: +65-(67)-788-161
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18
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Cheng Y, Chen Y, Wang G, Liu P, Xie G, Jing H, Chen H, Fan Y, Wang M, Zhou J. Protein Methylation in Diabetic Kidney Disease. Front Med (Lausanne) 2022; 9:736006. [PMID: 35647002 PMCID: PMC9133329 DOI: 10.3389/fmed.2022.736006] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Chronic kidney disease (CKD) is defined by persistent urine aberrations, structural abnormalities, or impaired excretory renal function. Diabetes is the leading cause of CKD. Their common pathological manifestation is renal fibrosis. Approximately half of all patients with type 2 diabetes and one-third with type 1 diabetes will develop CKD. However, renal fibrosis mechanisms are still poorly understood, especially post-transcriptional and epigenetic regulation. And an unmet need remains for innovative treatment strategies for preventing, arresting, treating, and reversing diabetic kidney disease (DKD). People believe that protein methylation, including histone and non-histone, is an essential type of post-translational modification (PTM). However, prevalent reviews mainly focus on the causes such as DNA methylation. This review will take insights into the protein part. Furthermore, by emphasizing the close relationship between protein methylation and DKD, we will summarize the clinical research status and foresee the application prospect of protein methyltransferase (PMT) inhibitors in DKD treatment. In a nutshell, our review will contribute to a more profound understanding of DKD’s molecular mechanism and inspire people to dig into this field.
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Affiliation(s)
- Ye Cheng
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Yanna Chen
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Guodong Wang
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Pei Liu
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Guiling Xie
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Huan Jing
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Hongtao Chen
- Department of Anesthesiology, The Eighth People’s Hospital of Guangzhou, Guangzhou, China
| | - Youlin Fan
- Department of Anesthesiology, Guangzhou Panyu Central Hospital of Panyu District, Guangzhou, China
| | - Min Wang
- Department of Anesthesiology, The Gaoming People’s Hospital, Foshan, China
| | - Jun Zhou
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
- *Correspondence: Jun Zhou,
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19
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Functional validation of variants of unknown significance using CRISPR gene editing and transcriptomics: A Kleefstra syndrome case study. Gene X 2022; 821:146287. [PMID: 35176430 DOI: 10.1016/j.gene.2022.146287] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/20/2021] [Accepted: 02/03/2022] [Indexed: 11/21/2022] Open
Abstract
There are an estimated > 400 million people living with a rare disease globally, with genetic variants the cause of approximately 80% of cases. Next Generation Sequencing (NGS) rapidly identifies genetic variants however they are often of unknown significance. Low throughput functional validation in specialist laboratories is the current ad hoc approach for functional validation of genetic variants, which creating major bottlenecks in patient diagnosis. This study investigates the application of CRISPR gene editing followed by genome wide transcriptomic profiling to facilitate patient diagnosis. As proof-of-concept, we introduced a variant in the Euchromatin histone methyl transferase (EHMT1) gene into HEK293T cells. We identified changes in the regulation of the cell cycle, neural gene expression and suppression of gene expression changes on chromosome 19 and chromosome X, that are in keeping with Kleefstra syndrome clinical phenotype and/or provide insight into disease mechanism. This study demonstrates the utility of genome editing followed by functional readouts to rapidly and systematically validating the function of variants of unknown significance in patients suffering from rare diseases.
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20
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Feoli A, Viviano M, Cipriano A, Milite C, Castellano S, Sbardella G. Lysine methyltransferase inhibitors: where we are now. RSC Chem Biol 2022; 3:359-406. [PMID: 35441141 PMCID: PMC8985178 DOI: 10.1039/d1cb00196e] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/10/2021] [Indexed: 12/14/2022] Open
Abstract
Protein lysine methyltransferases constitute a large family of epigenetic writers that catalyse the transfer of a methyl group from the cofactor S-adenosyl-l-methionine to histone- and non-histone-specific substrates. Alterations in the expression and activity of these proteins have been linked to the genesis and progress of several diseases, including cancer, neurological disorders, and growing defects, hence they represent interesting targets for new therapeutic approaches. Over the past two decades, the identification of modulators of lysine methyltransferases has increased tremendously, clarifying the role of these proteins in different physio-pathological states. The aim of this review is to furnish an updated outlook about the protein lysine methyltransferases disclosed modulators, reporting their potency, their mechanism of action and their eventual use in clinical and preclinical studies.
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Affiliation(s)
- Alessandra Feoli
- Department of Pharmacy, Epigenetic Med Chem Lab, University of Salerno via Giovanni Paolo II 132 I-84084 Fisciano SA Italy +39-089-96-9602 +39-089-96-9770
| | - Monica Viviano
- Department of Pharmacy, Epigenetic Med Chem Lab, University of Salerno via Giovanni Paolo II 132 I-84084 Fisciano SA Italy +39-089-96-9602 +39-089-96-9770
| | - Alessandra Cipriano
- Department of Pharmacy, Epigenetic Med Chem Lab, University of Salerno via Giovanni Paolo II 132 I-84084 Fisciano SA Italy +39-089-96-9602 +39-089-96-9770
| | - Ciro Milite
- Department of Pharmacy, Epigenetic Med Chem Lab, University of Salerno via Giovanni Paolo II 132 I-84084 Fisciano SA Italy +39-089-96-9602 +39-089-96-9770
| | - Sabrina Castellano
- Department of Pharmacy, Epigenetic Med Chem Lab, University of Salerno via Giovanni Paolo II 132 I-84084 Fisciano SA Italy +39-089-96-9602 +39-089-96-9770
| | - Gianluca Sbardella
- Department of Pharmacy, Epigenetic Med Chem Lab, University of Salerno via Giovanni Paolo II 132 I-84084 Fisciano SA Italy +39-089-96-9602 +39-089-96-9770
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21
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Fear VS, Forbes CA, Anderson D, Rauschert S, Syn G, Shaw N, Jamieson S, Ward M, Baynam G, Lassmann T. CRISPR single base editing, neuronal disease modelling and functional genomics for genetic variant analysis: pipeline validation using Kleefstra syndrome EHMT1 haploinsufficiency. Stem Cell Res Ther 2022; 13:69. [PMID: 35139903 PMCID: PMC8827184 DOI: 10.1186/s13287-022-02740-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/28/2021] [Indexed: 11/22/2022] Open
Abstract
Background Over 400 million people worldwide are living with a rare disease. Next Generation Sequencing (NGS) identifies potential disease causative genetic variants. However, many are identified as variants of uncertain significance (VUS) and require functional laboratory validation to determine pathogenicity, and this creates major diagnostic delays. Methods In this study we test a rapid genetic variant assessment pipeline using CRISPR homology directed repair to introduce single nucleotide variants into inducible pluripotent stem cells (iPSCs), followed by neuronal disease modelling, and functional genomics on amplicon and RNA sequencing, to determine cellular changes to support patient diagnosis and identify disease mechanism. Results As proof-of-principle, we investigated an EHMT1 (Euchromatin histone methyltransferase 1; EHMT1 c.3430C > T; p.Gln1144*) genetic variant pathogenic for Kleefstra syndrome and determined changes in gene expression during neuronal progenitor cell differentiation. This pipeline rapidly identified Kleefstra syndrome in genetic variant cells compared to healthy cells, and revealed novel findings potentially implicating the key transcription factors REST and SP1 in disease pathogenesis. Conclusion The study pipeline is a rapid, robust method for genetic variant assessment that will support rare diseases patient diagnosis. The results also provide valuable information on genome wide perturbations key to disease mechanism that can be targeted for drug treatments. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02740-3.
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Affiliation(s)
- Vanessa S Fear
- Translational Genetics, Precision Health, Telethon Kids Institute, Northern Entrance, Perth Children's Hospital, 15 Hospital Avenue, Nedlands, WA, 6009, Australia.
| | - Catherine A Forbes
- Translational Genetics, Precision Health, Telethon Kids Institute, Northern Entrance, Perth Children's Hospital, 15 Hospital Avenue, Nedlands, WA, 6009, Australia
| | - Denise Anderson
- Computational Biology, Precision Health, Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, 6009, Australia
| | - Sebastian Rauschert
- Computational Biology, Precision Health, Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, 6009, Australia
| | - Genevieve Syn
- Computational Biology, Precision Health, Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, 6009, Australia
| | - Nicole Shaw
- Translational Genetics, Precision Health, Telethon Kids Institute, Northern Entrance, Perth Children's Hospital, 15 Hospital Avenue, Nedlands, WA, 6009, Australia
| | - Sarra Jamieson
- Computational Biology, Precision Health, Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, 6009, Australia
| | - Michelle Ward
- Undiagnosed Diseases Program, Genetic Services of WA, Subiaco, Australia
| | - Gareth Baynam
- Western Australian Register of Developmental Anomalies, King Edward Memorial Hospital, Subiaco, WA, 6008, Australia.,Undiagnosed Diseases Program, Genetic Services of WA, Subiaco, Australia
| | - Timo Lassmann
- Translational Genetics, Precision Health, Telethon Kids Institute, Northern Entrance, Perth Children's Hospital, 15 Hospital Avenue, Nedlands, WA, 6009, Australia.,Computational Biology, Precision Health, Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, 6009, Australia
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22
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Idigo NJ, Voigt P. Detection and Quantification of Histone Methyltransferase Activity In Vitro. Methods Mol Biol 2022; 2529:43-61. [PMID: 35733009 DOI: 10.1007/978-1-0716-2481-4_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Histone methyltransferases (HMTs) catalyze the methylation of lysine and arginine residues in histone as well as nonhistone substrates. In vitro histone methyltransferase assays have been instrumental in identifying HMTs, and they continue to be invaluable tools for the study of these important enzymes, revealing novel substrates and modes of regulation.Here we describe a universal protocol to examine HMT activity in vitro that can be adapted to a range of HMTs, substrates, and experimental objectives. We provide protocols for the detection of activity based on incorporation of 3H-labeled methyl groups from S-adenosylmethionine (SAM), methylation-specific antibodies, and quantification of the reaction product S-adenosylhomocysteine (SAH).
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Affiliation(s)
- Nwamaka J Idigo
- Wellcome Centre for Cell Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, UK
| | - Philipp Voigt
- Epigenetics Programme, Babraham Institute, Cambridge, UK.
- Wellcome Centre for Cell Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, UK.
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23
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Structural Analysis of SMYD3 Lysine Methyltransferase for the Development of Competitive and Specific Enzyme Inhibitors. Diseases 2021; 10:diseases10010004. [PMID: 35076487 PMCID: PMC8788566 DOI: 10.3390/diseases10010004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 12/03/2021] [Accepted: 12/11/2021] [Indexed: 12/17/2022] Open
Abstract
Lysine methylation is among the key posttranslational modifications to histones that contribute to epigenetic regulation. SMYD3 is a lysine methyltransferase that is essential for the proliferation of a range of tumorigenic cells. The findings that SMYD3 is significantly upregulated in most colorectal carcinomas, hepatocellular carcinomas, and breast cell carcinomas support a model in which its aberrant expression modifies established patterns of gene expression, ultimately driving unrestrained proliferation. Herein, we dissect the unique structural features of SMYD3 relative to other SET enzymes, with an emphasis on the implications for selective design of therapeutics for the clinical management of cancer. Further, we illustrate the ability of inhibitors targeting the SET domain of SMYD3 to reduce the viability of colorectal and lung carcinoma cells.
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24
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Caron M, Gely L, Garvis S, Adrait A, Couté Y, Palladino F, Fabrizio P. Loss of SET1/COMPASS methyltransferase activity reduces lifespan and fertility in Caenorhabditis elegans. Life Sci Alliance 2021; 5:5/3/e202101140. [PMID: 34893559 PMCID: PMC8675910 DOI: 10.26508/lsa.202101140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 01/06/2023] Open
Abstract
Changes in histone post-translational modifications are associated with aging through poorly defined mechanisms. Histone 3 lysine 4 (H3K4) methylation at promoters is deposited by SET1 family methyltransferases acting within conserved multiprotein complexes known as COMPASS. Previous work yielded conflicting results about the requirement for H3K4 methylation during aging. Here, we reassessed the role of SET1/COMPASS-dependent H3K4 methylation in Caenorhabditis elegans lifespan and fertility by generating set-2(syb2085) mutant animals that express a catalytically inactive form of SET-2, the C. elegans SET1 homolog. We show that set-2(syb2085) animals retain the ability to form COMPASS, but have a marked global loss of H3K4 di- and trimethylation (H3K4me2/3). Reduced H3K4 methylation was accompanied by loss of fertility, as expected; however, in contrast to earlier studies, set-2(syb2085) mutants displayed a significantly shortened, not extended, lifespan and had normal intestinal fat stores. Other commonly used set-2 mutants were also short-lived, as was a cfp-1 mutant that lacks the SET1/COMPASS chromatin-targeting component. These results challenge previously held views and establish that WT H3K4me2/3 levels are essential for normal lifespan in C. elegans.
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Affiliation(s)
- Matthieu Caron
- Laboratory of Biology and Modelling of the Cell, Ecole Normale Supérieure de Lyon, CNRS UMR5239, INSERM U1210, Université de Lyon, Lyon, France
| | - Loïc Gely
- Laboratory of Biology and Modelling of the Cell, Ecole Normale Supérieure de Lyon, CNRS UMR5239, INSERM U1210, Université de Lyon, Lyon, France
| | - Steven Garvis
- Laboratory of Biology and Modelling of the Cell, Ecole Normale Supérieure de Lyon, CNRS UMR5239, INSERM U1210, Université de Lyon, Lyon, France
| | - Annie Adrait
- University of Grenoble Alpes, INSERM, CEA, UMR BioSanté U1292, CNRS, CEA, FR2048, Grenoble, France
| | - Yohann Couté
- University of Grenoble Alpes, INSERM, CEA, UMR BioSanté U1292, CNRS, CEA, FR2048, Grenoble, France
| | - Francesca Palladino
- Laboratory of Biology and Modelling of the Cell, Ecole Normale Supérieure de Lyon, CNRS UMR5239, INSERM U1210, Université de Lyon, Lyon, France
| | - Paola Fabrizio
- Laboratory of Biology and Modelling of the Cell, Ecole Normale Supérieure de Lyon, CNRS UMR5239, INSERM U1210, Université de Lyon, Lyon, France
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25
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Poulard C, Noureddine LM, Pruvost L, Le Romancer M. Structure, Activity, and Function of the Protein Lysine Methyltransferase G9a. Life (Basel) 2021; 11:life11101082. [PMID: 34685453 PMCID: PMC8541646 DOI: 10.3390/life11101082] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/08/2021] [Accepted: 10/08/2021] [Indexed: 12/17/2022] Open
Abstract
G9a is a lysine methyltransferase catalyzing the majority of histone H3 mono- and dimethylation at Lys-9 (H3K9), responsible for transcriptional repression events in euchromatin. G9a has been shown to methylate various lysine residues of non-histone proteins and acts as a coactivator for several transcription factors. This review will provide an overview of the structural features of G9a and its paralog called G9a-like protein (GLP), explore the biochemical features of G9a, and describe its post-translational modifications and the specific inhibitors available to target its catalytic activity. Aside from its role on histone substrates, the review will highlight some non-histone targets of G9a, in order gain insight into their role in specific cellular mechanisms. Indeed, G9a was largely described to be involved in embryonic development, hypoxia, and DNA repair. Finally, the involvement of G9a in cancer biology will be presented.
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Affiliation(s)
- Coralie Poulard
- Cancer Research Cancer of Lyon, Université de Lyon, F-69000 Lyon, France; (L.M.N.); (L.P.); (M.L.R.)
- Inserm U1052, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
- CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
- Correspondence:
| | - Lara M. Noureddine
- Cancer Research Cancer of Lyon, Université de Lyon, F-69000 Lyon, France; (L.M.N.); (L.P.); (M.L.R.)
- Inserm U1052, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
- CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
- Laboratory of Cancer Biology and Molecular Immunology, Faculty of Sciences, Lebanese University, Hadat-Beirut 90565, Lebanon
| | - Ludivine Pruvost
- Cancer Research Cancer of Lyon, Université de Lyon, F-69000 Lyon, France; (L.M.N.); (L.P.); (M.L.R.)
- Inserm U1052, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
- CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
| | - Muriel Le Romancer
- Cancer Research Cancer of Lyon, Université de Lyon, F-69000 Lyon, France; (L.M.N.); (L.P.); (M.L.R.)
- Inserm U1052, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
- CNRS UMR5286, Centre de Recherche en Cancérologie de Lyon, F-69000 Lyon, France
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Witecka A, Kwiatkowski S, Ishikawa T, Drozak J. The Structure, Activity, and Function of the SETD3 Protein Histidine Methyltransferase. Life (Basel) 2021; 11:1040. [PMID: 34685411 PMCID: PMC8537074 DOI: 10.3390/life11101040] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/27/2021] [Accepted: 09/29/2021] [Indexed: 12/03/2022] Open
Abstract
SETD3 has been recently identified as a long sought, actin specific histidine methyltransferase that catalyzes the Nτ-methylation reaction of histidine 73 (H73) residue in human actin or its equivalent in other metazoans. Its homologs are widespread among multicellular eukaryotes and expressed in most mammalian tissues. SETD3 consists of a catalytic SET domain responsible for transferring the methyl group from S-adenosyl-L-methionine (AdoMet) to a protein substrate and a RuBisCO LSMT domain that recognizes and binds the methyl-accepting protein(s). The enzyme was initially identified as a methyltransferase that catalyzes the modification of histone H3 at K4 and K36 residues, but later studies revealed that the only bona fide substrate of SETD3 is H73, in the actin protein. The methylation of actin at H73 contributes to maintaining cytoskeleton integrity, which remains the only well characterized biological effect of SETD3. However, the discovery of numerous novel methyltransferase interactors suggests that SETD3 may regulate various biological processes, including cell cycle and apoptosis, carcinogenesis, response to hypoxic conditions, and enterovirus pathogenesis. This review summarizes the current advances in research on the SETD3 protein, its biological importance, and role in various diseases.
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Affiliation(s)
- Apolonia Witecka
- Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland; (A.W.); (S.K.)
| | - Sebastian Kwiatkowski
- Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland; (A.W.); (S.K.)
| | - Takao Ishikawa
- Department of Molecular Biology, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Jakub Drozak
- Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland; (A.W.); (S.K.)
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Exploration of the Activation Mechanism of the Epigenetic Regulator MLL3: A QM/MM Study. Biomolecules 2021; 11:biom11071051. [PMID: 34356675 PMCID: PMC8301819 DOI: 10.3390/biom11071051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/07/2021] [Accepted: 07/10/2021] [Indexed: 11/17/2022] Open
Abstract
The mixed lineage leukemia 3 or MLL3 is the enzyme in charge of the writing of an epigenetic mark through the methylation of lysine 4 from the N-terminal domain of histone 3 and its deregulation has been related to several cancer lines. An interesting feature of this enzyme comes from its regulation mechanism, which involves its binding to an activating dimer before it can be catalytically functional. Once the trimer is formed, the reaction mechanism proceeds through the deprotonation of the lysine followed by the methyl-transfer reaction. Here we present a detailed exploration of the activation mechanism through a QM/MM approach focusing on both steps of the reaction, aiming to provide new insights into the deprotonation process and the role of the catalytic machinery in the methyl-transfer reaction. Our finding suggests that the source of the activation mechanism comes from conformational restriction mediated by the formation of a network of salt-bridges between MLL3 and one of the activating subunits, which restricts and stabilizes the positioning of several residues relevant for the catalysis. New insights into the deprotonation mechanism of lysine are provided, identifying a valine residue as crucial in the positioning of the water molecule in charge of the process. Finally, a tyrosine residue was found to assist the methyl transfer from SAM to the target lysine.
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Xing J, Jie W. Methyltransferase SET domain family and its relationship with cardiovascular development and diseases. Zhejiang Da Xue Xue Bao Yi Xue Ban 2021; 51:251-260. [PMID: 35462466 DOI: 10.3724/zdxbyxb-2021-0192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Abnormal epigenetic modification is closely related to the occurrence and development of cardiovascular diseases. The SET domain (SETD) family is an important epigenetic modifying enzyme containing SETD. They mainly affect gene expression by methylating H3K4, H3K9, H3K36 and H4K20. Additionally, the SETD family catalyzes the methylation of non-histone proteins, thereby affects the signal transduction of signal transduction and activator of transcription (STAT) 1, Wnt/β-catenin, hypoxia-inducible factor (HIF)-1α and Hippo/YAP pathways. The SETD family has the following regulatory effects on cardiovascular development and diseases: regulating coronary artery formation and cardiac development; protecting cardiac tissue from ischemia reperfusion injury; regulating inflammation, oxidative stress and apoptosis in cardiovascular complications of diabetes; participating in the formation of pulmonary hypertension; regulating thrombosis, cardiac hypertrophy and arrhythmia. This article summarizes the basic structures, expression regulation mechanisms and the role of existing SETD family members in cardiovascular development and diseases, in order to provide a basis for understanding the molecular mechanism of cardiovascular disease and exploring the therapeutic targets.
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Affiliation(s)
- Jingci Xing
- 1. Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, Guangdong Province, China
| | - Wei Jie
- 1. Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, Guangdong Province, China.,Medical University, Key Laboratory of Emergency and Trauma, Ministry of Education, Hainan Provincial Key Laboratory of Tropical Cardiovascular Diseases Research, Haikou 571199, China
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Lewis CA, Wolfenden R. The Burden Borne by Protein Methyltransferases: Rates and Equilibria of Non-enzymatic Methylation of Amino Acid Side Chains by SAM in Water. Biochemistry 2021; 60:854-858. [PMID: 33667085 DOI: 10.1021/acs.biochem.1c00028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
SAM is a powerful methylating agent, with a methyl group transfer potential matching the phosphoryl group transfer potential of ATP. SAM-dependent N-methyltransferases have evolved to catalyze the modification of specific lysine residues in histones and transcription factors, in addition to generating epinephrine, N-methylnicotinamide, and a quaternary amine (betaine) that is used to maintain osmotic pressure in plants and halophilic bacteria. To assess the catalytic power of these enzymes and their potential susceptibility to transition state and multisubstrate analogue inhibitors, we determined the rates and positions of the equilibrium of methyl transfer from the trimethylsulfonium ion to model amines in the absence of a catalyst. Unlike the methyl group transfer potential of SAM, which becomes more negative with an increase in pH throughout the normal pH range, equilibrium constants for the hydrolytic demethylation of secondary, tertiary, and quaternary amines are found to be insensitive to a change in pH and resemble each other in magnitude, with an average ΔG value of approximately -0.7 kcal/mol at pH 7. Thus, each of the three steps in the mono-, di-, and trimethylation of lysine by SAM is accompanied by a change in free energy of -7.5 kcal/mol in a neutral solution. Arrhenius analysis of the uncatalyzed reactions shows that the unprotonated form of glycine attacks the trimethylsulfonium ion (TMS+) with second-order rates constant of 1.8 × 10-7 M-1 s-1 at 25 °C (ΔH⧧ = 22 kcal/mol, and TΔS⧧ = -6 kcal/mol). Comparable values are observed for the methylation of secondary and tertiary amines, with k25 values of 1.1 × 10-7 M-1 s-1 for sarcosine and 4.3 × 10-8 M-1 s-1 for dimethylglycine. The non-enzymatic methylations of imidazole and methionine by TMS+, benchmarks for the methylation of histidine and methionine residues by SETD3, exhibit k25 values of 3.3 × 10-9 and 1.2 × 10-9 M-1 s-1, respectively. Lysine methylation by SAM, although slow under physiological conditions (t1/2 = 7 weeks at 25 °C), is accelerated 1.1 × 1012 -fold at the active site of a SET domain methyltransferase.
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Affiliation(s)
- Charles A Lewis
- Department of Biochemistry and Biophysics, The University of North Carolina, Chapel Hill, North Carolina 27514, United States
| | - Richard Wolfenden
- Department of Biochemistry and Biophysics, The University of North Carolina, Chapel Hill, North Carolina 27514, United States
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30
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Dumasia NP, Pethe PS. Pancreas development and the Polycomb group protein complexes. Mech Dev 2020; 164:103647. [PMID: 32991980 DOI: 10.1016/j.mod.2020.103647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/02/2020] [Accepted: 09/17/2020] [Indexed: 02/07/2023]
Abstract
The dual nature of pancreatic tissue permits both endocrine and exocrine functions. Enzymatic secretions by the exocrine pancreas help digestive processes while the pancreatic hormones regulate glucose homeostasis and energy metabolism. Pancreas organogenesis is defined by a conserved array of signaling pathways that act on common gut progenitors to bring about the generation of diverse cell types. Multiple cellular processes characterize development of the mature organ. These processes are mediated by signaling pathways that regulate lineage-specific transcription factors and chromatin modifications guiding long-term gene expression programs. The chromatin landscape is altered chiefly by DNA or histone modifications, chromatin remodelers, and non-coding RNAs. Amongst histone modifiers, several studies have identified Polycomb group (PcG) proteins as crucial determinants mediating transcriptional repression of genes involved in developmental processes. Although PcG-mediated chromatin modifications define cellular transitions and influence cell identity of multipotent progenitors, much remains to be understood regarding coordination between extracellular signals and their impact on Polycomb functions during the pancreas lineage progression. In this review, we discuss interactions between sequence-specific DNA binding proteins and chromatin regulators underlying pancreas development and insulin producing β-cells, with particular focus on Polycomb group proteins. Understanding such basic molecular mechanisms would improve current strategies for stem cell-based differentiation while also help elucidate the pathogenesis of several pancreas-related maladies, including diabetes and pancreatic cancer.
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Affiliation(s)
- Niloufer P Dumasia
- Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's NMIMS (deemed to-be) University, Mumbai 400 056, India
| | - Prasad S Pethe
- Symbiosis Centre for Stem Cell Research (SCSCR), Symbiosis International University, Lavale, Pune 412 115, India.
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Shu WJ, Du HN. The methyltransferase SETD3-mediated histidine methylation: Biological functions and potential implications in cancers. Biochim Biophys Acta Rev Cancer 2020; 1875:188465. [PMID: 33157163 DOI: 10.1016/j.bbcan.2020.188465] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/20/2020] [Accepted: 10/28/2020] [Indexed: 12/16/2022]
Abstract
SETD3 belongs to a family of SET-domain containing proteins. Recently, SETD3 was found as the first and so-far the only known metazoan histidine methyltransferase that catalyzes actin histidine 73 (His73) methylation, a pervasive modification which was discovered more than 50 years ago. In this review, we summarize some recent advances in SETD3 research, focusing on structural properties, substrate-recognition features, and physiological functions. We particularly highlight potential pathological relevance of SETD3 in human cancers and raise some questions to promote discussion about this novel histidine methyltransferase.
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Affiliation(s)
- Wen-Jie Shu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Cancer Center of Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Hai-Ning Du
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Cancer Center of Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China.
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32
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Batra R, Gautam T, Pal S, Chaturvedi D, Rakhi, Jan I, Balyan HS, Gupta PK. Identification and characterization of SET domain family genes in bread wheat (Triticum aestivum L.). Sci Rep 2020; 10:14624. [PMID: 32884064 PMCID: PMC7471321 DOI: 10.1038/s41598-020-71526-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 08/18/2020] [Indexed: 01/21/2023] Open
Abstract
SET domain genes (SDGs) that are involved in histone methylation have been examined in many plant species, but have never been examined in bread wheat; the histone methylation caused due to SDGs is associated with regulation of gene expression at the transcription level. We identified a total of 166 bread wheat TaSDGs, which carry some interesting features including the occurrence of tandem/interspersed duplications, SSRs (simple sequence repeats), transposable elements, lncRNAs and targets for miRNAs along their lengths and transcription factor binding sites (TFBS) in the promoter regions. Only 130 TaSDGs encoded proteins with complete SET domain, the remaining 36 proteins had truncated SET domain. The TaSDG encoded proteins were classified into six classes (I–V and VII). In silico expression analysis indicated relatively higher expression (FPKM > 20) of eight of the 130 TaSDGs in different tissues, and downregulation of 30 TaSDGs under heat and drought at the seedling stage. qRT-PCR was also conducted to validate the expression of seven genes at the seedling stage in pairs of contrasting genotypes in response to abiotic stresses (water and heat) and biotic stress (leaf rust). These genes were generally downregulated in response to the three stresses examined.
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Affiliation(s)
- Ritu Batra
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Tinku Gautam
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Sunita Pal
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Deepti Chaturvedi
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Rakhi
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Irfat Jan
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Harindra Singh Balyan
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India
| | - Pushpendra Kumar Gupta
- Department of Genetics and Plant Breeding, CCS University, Meerut, Uttar Pradesh, 250004, India.
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Wang ZA, Cole PA. The Chemical Biology of Reversible Lysine Post-translational Modifications. Cell Chem Biol 2020; 27:953-969. [PMID: 32698016 PMCID: PMC7487139 DOI: 10.1016/j.chembiol.2020.07.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/09/2020] [Accepted: 07/01/2020] [Indexed: 12/31/2022]
Abstract
Lysine (Lys) residues in proteins undergo a wide range of reversible post-translational modifications (PTMs), which can regulate enzyme activities, chromatin structure, protein-protein interactions, protein stability, and cellular localization. Here we discuss the "writers," "erasers," and "readers" of some of the common protein Lys PTMs and summarize examples of their major biological impacts. We also review chemical biology approaches, from small-molecule probes to protein chemistry technologies, that have helped to delineate Lys PTM functions and show promise for a diverse set of biomedical applications.
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Affiliation(s)
- Zhipeng A Wang
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 77 Avenue Louis Pasteur NRB, Boston, MA 02115, USA
| | - Philip A Cole
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 77 Avenue Louis Pasteur NRB, Boston, MA 02115, USA.
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34
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Nemoto M, Iwaki S, Moriya H, Monden Y, Tamura T, Inagaki K, Mayama S, Obuse K. Comparative Gene Analysis Focused on Silica Cell Wall Formation: Identification of Diatom-Specific SET Domain Protein Methyltransferases. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2020; 22:551-563. [PMID: 32488507 DOI: 10.1007/s10126-020-09976-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
Silica cell walls of diatoms have attracted attention as a source of nanostructured functional materials and have immense potential for a variety of applications. Previous studies of silica cell wall formation have identified numerous involved proteins, but most of these proteins are species-specific and are not conserved among diatoms. However, because the basic process of diatom cell wall formation is common to all diatom species, ubiquitous proteins and molecules will reveal the mechanisms of cell wall formation. In this study, we assembled de novo transcriptomes of three diatom species, Nitzschia palea, Achnanthes kuwaitensis, and Pseudoleyanella lunata, and compared protein-coding genes of five genome-sequenced diatom species. These analyses revealed a number of diatom-specific genes that encode putative endoplasmic reticulum-targeting proteins. Significant numbers of these proteins showed homology to silicanin-1, which is a conserved diatom protein that reportedly contributes to cell wall formation. These proteins also included a previously unrecognized SET domain protein methyltransferase family that may regulate functions of cell wall formation-related proteins and long-chain polyamines. Proteomic analysis of cell wall-associated proteins in N. palea identified a protein that is also encoded by one of the diatom-specific genes. Expression analysis showed that candidate genes were upregulated in response to silicon, suggesting that these genes play roles in silica cell wall formation. These candidate genes can facilitate further investigations of silica cell wall formation in diatoms.
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Affiliation(s)
- Michiko Nemoto
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan.
| | - Sayako Iwaki
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan
| | - Hisao Moriya
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan
| | - Yuki Monden
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan
| | - Takashi Tamura
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan
| | - Kenji Inagaki
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan
| | - Shigeki Mayama
- Department of Biology, Tokyo Gakugei University, Tokyo, 184-8511, Japan
| | - Kiori Obuse
- Graduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan
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35
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Zhao LN, Kaldis P. Cascading proton transfers are a hallmark of the catalytic mechanism of SAM-dependent methyltransferases. FEBS Lett 2020; 594:2128-2139. [PMID: 32353165 DOI: 10.1002/1873-3468.13799] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 04/20/2020] [Accepted: 04/22/2020] [Indexed: 11/10/2022]
Abstract
The S-adenosyl methionine (SAM)-dependent methyltransferases attach a methyl group to the deprotonated methyl lysine using SAM as a donor. An intriguing, yet unanswered, question is how the deprotonation takes place. PRDM9 with well-defined enzyme activity is a good representative of the methyltransferase family to study the deprotonation and subsequently the methyl transfer. Our study has found that the pKa of Tyr357 is low enough to make it an ideal candidate for proton abstraction from the methyl lysine. The partially deprontonated Tyr357 is able to change its H-bond pattern thus bridging two proton tunneling states and providing a cascading proton transfer. We have uncovered a new catalytic mechanism for the deprotonation of the methyl lysine in methyltransferases.
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Affiliation(s)
- Li Na Zhao
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Philipp Kaldis
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Department of Clinical Sciences, Lund University, Clinical Research Center (CRC), Malmö, Sweden
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36
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Feng X, Lu H, Yue J, Shettigar M, Liu J, Denzin LK, Shen Z. Deletion of Mouse Setd4 Promotes the Recovery of Hematopoietic Failure. Int J Radiat Oncol Biol Phys 2020; 107:779-792. [PMID: 32259569 DOI: 10.1016/j.ijrobp.2020.03.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 03/05/2020] [Accepted: 03/16/2020] [Indexed: 02/06/2023]
Abstract
PURPOSE Acquired hematopoietic failure is commonly caused by therapeutic and accidental exposure of the bone marrow (BM) to toxic agents. Efficient recovery from BM failure is dictated not only by the intrinsic sensitivity and proliferation capacity of the hematopoietic stem and progenitor cells but also by the BM environment niche. Identification of genetic factors that improve recovery from hematopoietic failure is essential. Vertebrate SETD4 is a poorly characterized and putatively nonhistone methyltransferase. This study aims to identify the roles of SETD4 in BM recovery. METHODS AND MATERIALS An inducible SETD4 knockout mouse model (Setd4flox/flox;Rosa26-CreERT2+) was used. Adult sex-matched littermates were treated with tamoxifen to induce Setd4 deletion or oil as the control. Tamoxifen-treated Setd4wt/wt;Rosa26-CreERT2+ mice were included as another control. Those mice were irradiated to induce hematopoietic syndrome and analyzed to identify the roles and mechanisms of Setd4 in of BM recovery. RESULTS Loss of Setd4 in adult mice improved the survival of whole-body irradiation-induced BM failure. This was associated with improved recoveries of long-term and short-term hematopoietic stem cells (HSCs) and early progenitor cells. BM transplantation analyses surprisingly showed that the improved recovery was not due to radiation resistance of the Setd4-deficient HSCs but that Setd4-deficient HSCs were actually more sensitive to radiation. However, the Setd4-deficient mice were better recipients for allogeneic HSC transplantation. Furthermore, there was enhanced splenic erythropoiesis in Setd4-deficient mice. CONCLUSION These findings not only revealed a previously unrecognized role of Setd4 as a unique modulator of hematopoiesis but also underscored the critical role of the BM niche in recovery from hematopoietic failure. Our study also implicated Setd4 as a potential target for therapeutic inhibition to improve the conditioning of the BM niche before allogeneic transplantation.
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Affiliation(s)
- Xing Feng
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Huimei Lu
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Jingyin Yue
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Megha Shettigar
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Jingmei Liu
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Lisa K Denzin
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Zhiyuan Shen
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey.
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Yamazaki S, Gukasyan HJ, Wang H, Uryu S, Sharma S. Translational Pharmacokinetic-Pharmacodynamic Modeling for an Orally Available Novel Inhibitor of Epigenetic Regulator Enhancer of Zeste Homolog 2. J Pharmacol Exp Ther 2020; 373:220-229. [PMID: 32094296 DOI: 10.1124/jpet.119.263491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/12/2020] [Indexed: 11/22/2022] Open
Abstract
PF06821497 has been identified as an orally available small-molecule enhancer of zeste homolog 2 inhibitor. The objectives of the present study were to characterize pharmacokinetic-pharmacodynamic-disease relationships of PF06821497 in xenograft mouse models with diffuse large B-cell lymphoma (Karpas422). An indirect-response model reasonably fit dose-dependent pharmacodynamic responses [histone H3 on lysine 27 (H3K27) me3 inhibition] with an unbound EC 50 of 76 nM, whereas a signal-transduction model sufficiently fit dose-dependent disease responses (tumor growth inhibition) with an unbound tumor stasis concentration (T sc ) of 168 nM. Thus, effective concentration for 70% of maximal effect (EC70) for H3K27me3 inhibition was roughly comparable to T sc , suggesting that 70% H3K27me3 inhibition could be required for tumor stasis. Consistently, an integrated pharmacokinetic-pharmacodynamic-disease model adequately describing tumor growth inhibition also suggested that ∼70% H3K27me3 inhibition was associated with tumor stasis. Based on these results, we would propose that an EC70 estimate for H3K27me3 inhibition corresponding to tumor stasis could be considered a minimum target efficacious concentration of PF06821497 in cancer patients. SIGNIFICANCE STATEMENT: Using a mathematical modeling approach, the quantitative relationships of an orally available anticancer small-molecule enhancer of zeste homolog 2 inhibitor, PF06821497, were characterized among pharmacokinetics, pharmacodynamic biomarker inhibition, and disease responses in nonclinical xenograft models with diffuse large B-cell lymphoma. The modeling results suggest that >70% histone H3 on lysine 27 (H3K27) me3 inhibition would be required for tumor stasis (i.e., 100% tumor growth inhibition). Accordingly, we would propose that an effective concentration for 70% of maximal effect estimate for H3K27me3 inhibition could be considered a minimum target efficacious concentration of PF06821497 in cancer patients.
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Affiliation(s)
- Shinji Yamazaki
- Pharmacokinetics, Dynamics and Metabolism (S.Y.), Pharmaceutical Science (H.J.G.), and Oncology Research Unit (H.W., S.U., S.S.), Pfizer Worldwide Research & Development, San Diego, California
| | - Hovhannes J Gukasyan
- Pharmacokinetics, Dynamics and Metabolism (S.Y.), Pharmaceutical Science (H.J.G.), and Oncology Research Unit (H.W., S.U., S.S.), Pfizer Worldwide Research & Development, San Diego, California
| | - Hui Wang
- Pharmacokinetics, Dynamics and Metabolism (S.Y.), Pharmaceutical Science (H.J.G.), and Oncology Research Unit (H.W., S.U., S.S.), Pfizer Worldwide Research & Development, San Diego, California
| | - Sean Uryu
- Pharmacokinetics, Dynamics and Metabolism (S.Y.), Pharmaceutical Science (H.J.G.), and Oncology Research Unit (H.W., S.U., S.S.), Pfizer Worldwide Research & Development, San Diego, California
| | - Shikhar Sharma
- Pharmacokinetics, Dynamics and Metabolism (S.Y.), Pharmaceutical Science (H.J.G.), and Oncology Research Unit (H.W., S.U., S.S.), Pfizer Worldwide Research & Development, San Diego, California
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38
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Miura K, Renhu N, Suzaki T. The PHD finger of Arabidopsis SIZ1 recognizes trimethylated histone H3K4 mediating SIZ1 function and abiotic stress response. Commun Biol 2020; 3:23. [PMID: 31925312 PMCID: PMC6954211 DOI: 10.1038/s42003-019-0746-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 12/19/2019] [Indexed: 11/23/2022] Open
Abstract
Arabidopsis SIZ1 encodes a SUMO E3 ligase to regulate abiotic and biotic stress responses. Among SIZ1 or mammalian PIAS orthologs, plant SIZ1 proteins contain the plant homeodomain (PHD) finger, a C4HC3 zinc finger. Here, we investigated the importance of PHD of Arabidopsis SIZ1. The ProSIZ1::SIZ1(ΔPHD):GFP was unable to complement growth retardation, ABA hypersensitivity, and the cold-sensitive phenotype of the siz1 mutant, but ProSIZ1::SIZ1:GFP could. Substitution of C162S in the PHD finger was unable to complement the siz1 mutation. Tri-methylated histone H3K4 (H3K4me3) was recognized by PHD, not by PHD(C162S). WRKY70 was up-regulated in the siz1-2 mutant and H3K4me3 accumulated at high levels in the WRKY70 promoter. PHD interacts with ATX, which mediates methylation of histone, probably leading to suppression of ATX’s function. These results suggest that the PHD finger of SIZ1 is important for recognition of the histone code and is required for SIZ1 function and transcriptional suppression. Kenji Miura et al. investigate the role of the plant homeodomain (PHD) finger of the Arabidopsis SIZ1 protein. They show that the PHD finger is involved in hormone response and temperature sensitivity, and plays an important role in H3K4 methylation, thereby affecting recognition of histone code and transcriptional suppression.
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Affiliation(s)
- Kenji Miura
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan. .,Tsukuba-Plant Innovation Research Center (T-PIRC), University of Tsukuba, Tsukuba, 305-8572, Japan.
| | - Na Renhu
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan
| | - Takuya Suzaki
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan.,Tsukuba-Plant Innovation Research Center (T-PIRC), University of Tsukuba, Tsukuba, 305-8572, Japan
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39
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Dai S, Horton JR, Wilkinson AW, Gozani O, Zhang X, Cheng X. An engineered variant of SETD3 methyltransferase alters target specificity from histidine to lysine methylation. J Biol Chem 2020; 295:2582-2589. [PMID: 31911441 DOI: 10.1074/jbc.ra119.012319] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/02/2020] [Indexed: 12/11/2022] Open
Abstract
Most characterized SET domain (SETD) proteins are protein lysine methyltransferases, but SETD3 was recently demonstrated to be a protein (i.e. actin) histidine-N3 methyltransferase. Human SETD3 shares a high structural homology with two known protein lysine methyltransferases-human SETD6 and the plant LSMT-but differs in the residues constituting the active site. In the SETD3 active site, Asn255 engages in a unique hydrogen-bonding interaction with the target histidine of actin that likely contributes to its >1300-fold greater catalytic efficiency (k cat/Km ) on histidine than on lysine. Here, we engineered active-site variants to switch the SETD3 target specificity from histidine to lysine. Substitution of Asn255 with phenylalanine (N255F), together with substitution of Trp273 with alanine (W273A), generated an active site mimicking that of known lysine methyltransferases. The doubly substituted SETD3 variant exhibited a 13-fold preference for lysine over histidine. We show, by means of X-ray crystallography, that the two target nitrogen atoms-the N3 atom of histidine and the terminal ϵ-amino nitrogen of lysine-occupy the same position and point toward and are within a short distance of the incoming methyl group of SAM for a direct methyl transfer during catalysis. In contrast, SETD3 and its Asn255 substituted derivatives did not methylate glutamine (another potentially methylated amino acid). However, the glutamine-containing peptide competed with the substrate peptide, and glutamine bound in the active site, but too far away from SAM to be methylated. Our results provide insight into the structural parameters defining the target amino acid specificity of SET enzymes.
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Affiliation(s)
- Shaobo Dai
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
| | - John R Horton
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
| | - Alex W Wilkinson
- Department of Biology, Stanford University, Stanford, California 94305
| | - Or Gozani
- Department of Biology, Stanford University, Stanford, California 94305
| | - Xing Zhang
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030.
| | - Xiaodong Cheng
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030.
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Feng X, Lu H, Yue J, Schneider N, Liu J, Denzin LK, Chan CS, De S, Shen Z. Loss of Setd4 delays radiation-induced thymic lymphoma in mice. DNA Repair (Amst) 2019; 86:102754. [PMID: 31794893 DOI: 10.1016/j.dnarep.2019.102754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 11/19/2019] [Accepted: 11/19/2019] [Indexed: 12/26/2022]
Abstract
Radiation-induced lymphomagenesis results from a clonogenic lymphoid cell proliferation due to genetic alterations and immunological dysregulation. Mouse models had been successfully used to identify risk and protective factors for radiation-induced DNA damage and carcinogenesis. The mammalian SETD4 is a poorly understood putative methyl-transferase. Here, we report that conditional Setd4 deletion in adult mice significantly extended the survival of radiation-induced T-lymphoma. However, in Tp53 deficient mice, Setd4 deletion did not delay the radiation-induced lymphomagenesis although it accelerated the spontaneous T-lymphomagenesis in non-irradiated mice. The T-lymphomas were largely clonogenic in both Setd4flox/flox and Setd4Δ/Δ mice based on sequencing analysis of the T-cell antigen β receptors. However, the Setd4Δ/Δ T-lymphomas were CD4+/CD8+ double positive, while the littermate Setd4flox/floxtumor were largely CD8+ single positive. A genomic sequencing analysis on chromosome deletion, inversion, duplication, and translocation, revealed a larger contribution of inversion but a less contribution of deletion to the overall chromosome rearrangements in the in Setd4Δ/Δ tumors than the Setd4flox/flox tumors. In addition, the Setd4flox/flox mice died more often from the large sizes of primary thymus lymphoma at earlier time, but there was a slight increase of lymphoma dissemination among peripheral organs in Setd4Δ/Δ at later times. These results suggest that Setd4 has a critical role in modulating lymphomagenesis and may be targeted to suppress radiation-induced carcinogenesis.
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Affiliation(s)
- Xing Feng
- Rutgers Cancer Institute of New Jersey, Department of Radiation Oncology, Rutgers Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, NJ 08903, USA
| | - Huimei Lu
- Rutgers Cancer Institute of New Jersey, Department of Radiation Oncology, Rutgers Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, NJ 08903, USA
| | - Jingyin Yue
- Rutgers Cancer Institute of New Jersey, Department of Radiation Oncology, Rutgers Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, NJ 08903, USA
| | - Neta Schneider
- Rutgers Cancer Institute of New Jersey, Department of Radiation Oncology, Rutgers Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, NJ 08903, USA
| | - Jingmei Liu
- Rutgers Cancer Institute of New Jersey, Department of Radiation Oncology, Rutgers Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, NJ 08903, USA
| | - Lisa K Denzin
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ, USA
| | - Chang S Chan
- Center for Systems and Computational Biology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Subhajyoti De
- Center for Systems and Computational Biology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Zhiyuan Shen
- Rutgers Cancer Institute of New Jersey, Department of Radiation Oncology, Rutgers Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, NJ 08903, USA.
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Sun P, Zhang SJ, Maksim S, Yao YF, Liu HM, Du J. Epigenetic Modification in Macrophages: A Promising Target for Tumor and Inflammation-associated Disease Therapy. Curr Top Med Chem 2019; 19:1350-1362. [PMID: 31215380 DOI: 10.2174/1568026619666190619143706] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 04/25/2019] [Accepted: 05/09/2019] [Indexed: 01/13/2023]
Abstract
Macrophages are essential for supporting tissue homeostasis, regulating immune response, and promoting tumor progression. Due to its heterogeneity, macrophages have different phenotypes and functions in various tissues and diseases. It is becoming clear that epigenetic modification playing an essential role in determining the biological behavior of cells. In particular, changes of DNA methylation, histone methylation and acetylation regulated by the corresponding epigenetic enzymes, can directly control macrophages differentiation and change their functions under different conditions. In addition, epigenetic enzymes also have become anti-tumor targets, such as HDAC, LSD1, DNMT, and so on. In this review, we presented an overview of the latest progress in the study of macrophages phenotype and function regulated by epigenetic modifications, including DNA methylation and histone modifications, to better understand how epigenetic modification controls macrophages phenotype and function in inflammation-associated diseases, and the application prospect in anti-tumor.
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Affiliation(s)
- Pei Sun
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou, China.,Key Laboratory of Advanced Drug Preparation Technologies (Zhengzhou University), Ministry of Education of China, Zhengzhou, China
| | - Shu-Jing Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou, China.,Key Laboratory of Advanced Drug Preparation Technologies (Zhengzhou University), Ministry of Education of China, Zhengzhou, China
| | - Semenov Maksim
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou, China.,Key Laboratory of Advanced Drug Preparation Technologies (Zhengzhou University), Ministry of Education of China, Zhengzhou, China
| | - Yong-Fang Yao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou, China.,Key Laboratory of Advanced Drug Preparation Technologies (Zhengzhou University), Ministry of Education of China, Zhengzhou, China
| | - Hong-Min Liu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou, China.,Key Laboratory of Advanced Drug Preparation Technologies (Zhengzhou University), Ministry of Education of China, Zhengzhou, China
| | - Juan Du
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
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42
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Li R, Wei X, Jiang DS. Protein methylation functions as the posttranslational modification switch to regulate autophagy. Cell Mol Life Sci 2019; 76:3711-3722. [PMID: 31222372 PMCID: PMC11105718 DOI: 10.1007/s00018-019-03161-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 05/10/2019] [Accepted: 05/28/2019] [Indexed: 02/07/2023]
Abstract
Studies over the past decades have elucidated the critical role of autophagy in human health and diseases. Although the processes of autophagy in the cytoplasm have been well studied, the posttranscriptional and epigenetic regulation mechanisms of autophagy are still poorly understood. Protein methylation, including histone methylation and non-histone protein methylation, is the most important type of posttranscriptional and epigenetic modification. Recent studies have shown that protein methylation is associated with effects on autophagosome formation, autophagy-related protein expression, and signaling pathway activation, but the details are still unclear. Thus, it is important to summarize the current status and discuss the future directions of research on protein methylation in the context of autophagy.
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Affiliation(s)
- Rui Li
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave., Wuhan, 430030, China
| | - Xiang Wei
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave., Wuhan, 430030, China
- Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China
- NHC Key Laboratory of Organ Transplantation, Ministry of Health, Wuhan, China
- Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, China
| | - Ding-Sheng Jiang
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Ave., Wuhan, 430030, China.
- Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China.
- NHC Key Laboratory of Organ Transplantation, Ministry of Health, Wuhan, China.
- Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, China.
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43
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Wang X, Long Y, Paucek RD, Gooding AR, Lee T, Burdorf RM, Cech TR. Regulation of histone methylation by automethylation of PRC2. Genes Dev 2019; 33:1416-1427. [PMID: 31488576 PMCID: PMC6771386 DOI: 10.1101/gad.328849.119] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 07/30/2019] [Indexed: 11/25/2022]
Abstract
In this study, Wang et al. set out to identify the methylation site on the EZH2 subunit of the core PRC2 complex and its physiological importance. Using mass spectrometry analysis of recombinant human PRC2, they identified a conserved methylation loop in EZH2 that serves an autoregulatory role and allows PRC2 to modulate its histone methyltransferase activity by sensing histone H3 tails, SAM concentration, and potentially other effectors. Polycomb-repressive complex 2 (PRC2) is a histone methyltransferase that is critical for regulating transcriptional repression in mammals. Its catalytic subunit, EZH2, is responsible for the trimethylation of H3K27 and also undergoes automethylation. Using mass spectrometry analysis of recombinant human PRC2, we identified three methylated lysine residues (K510, K514, and K515) on a disordered but highly conserved loop of EZH2. Methylation of these lysines increases PRC2 histone methyltransferase activity, whereas their mutation decreases activity in vitro. De novo histone methylation in an EZH2 knockout cell line is greatly impeded by mutation of the automethylation lysines. EZH2 automethylation occurs intramolecularly (in cis) by methylation of a pseudosubstrate sequence on a flexible loop. This posttranslational modification and cis regulation of PRC2 are analogous to the activation of many protein kinases by autophosphorylation. We propose that EZH2 automethylation allows PRC2 to modulate its histone methyltransferase activity by sensing histone H3 tails, SAM concentration, and perhaps other effectors.
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Affiliation(s)
- Xueyin Wang
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA.,Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
| | - Yicheng Long
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA.,Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
| | - Richard D Paucek
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA.,Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
| | - Anne R Gooding
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA.,Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
| | - Thomas Lee
- Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
| | - Rachel M Burdorf
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA.,Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
| | - Thomas R Cech
- Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA.,Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado, 80309 USA
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Structural basis for the target specificity of actin histidine methyltransferase SETD3. Nat Commun 2019; 10:3541. [PMID: 31388018 PMCID: PMC6684798 DOI: 10.1038/s41467-019-11554-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 07/22/2019] [Indexed: 12/26/2022] Open
Abstract
SETD3 is an actin histidine-N3 methyltransferase, whereas other characterized SET-domain enzymes are protein lysine methyltransferases. We report that in a pre-reactive complex SETD3 binds the N3-protonated form (N3-H) of actin His73, and in a post-reactive product complex, SETD3 generates the methylated histidine in an N1-protonated (N1-H) and N3-methylated form. During the reaction, the imidazole ring of His73 rotates ~105°, which shifts the proton from N3 to N1, thus ensuring that the target atom N3 is deprotonated prior to the methyl transfer. Under the conditions optimized for lysine deprotonation, SETD3 has weak lysine methylation activity on an actin peptide in which the target His73 is substituted by a lysine. The structure of SETD3 with Lys73-containing peptide reveals a bent conformation of Lys73, with its side chain aliphatic carbons tracing along the edge of imidazole ring and the terminal ε-amino group occupying a position nearly identical to the N3 atom of unmethylated histidine. SETD3 is the first known metazoan protein histidine methyltransferase but the molecular basis for its target specificity is unclear. Here, the authors elucidate the structural and molecular determinants for the histidine specificity of SETD3.
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45
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Worden EJ, Wolberger C. Activation and regulation of H2B-Ubiquitin-dependent histone methyltransferases. Curr Opin Struct Biol 2019; 59:98-106. [PMID: 31229920 DOI: 10.1016/j.sbi.2019.05.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/06/2019] [Accepted: 05/09/2019] [Indexed: 12/22/2022]
Abstract
Covalent modifications of histone proteins regulate a wide variety of cellular processes. Methylation of histone H3K79 and H3K4 is associated with active transcription and is catalyzed by Dot1L and Set1, respectively. Both Dot1L and Set1 are activated by prior ubiquitination of histone H2B on K120 in a process termed 'histone crosstalk'. Recent structures of Dot1L bound to a ubiquitinated nucleosome revealed how Dot1L is activated by ubiquitin and how Dot1L distorts the nucleosome to access its substrate. Structures of Dot1L-interacting proteins have provided insight into how Dot1L is recruited to sites of active transcription. Cryo-EM and crystallographic studies of the complex of proteins associated with Set1 (COMPASS), uncovered the architecture of COMPASS and how Set1 is activated upon complex assembly.
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Affiliation(s)
- Evan J Worden
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Cynthia Wolberger
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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46
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Guo Q, Liao S, Kwiatkowski S, Tomaka W, Yu H, Wu G, Tu X, Min J, Drozak J, Xu C. Structural insights into SETD3-mediated histidine methylation on β-actin. eLife 2019; 8:43676. [PMID: 30785395 PMCID: PMC6400499 DOI: 10.7554/elife.43676] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 02/19/2019] [Indexed: 01/01/2023] Open
Abstract
SETD3 is a member of the SET (Su(var)3–9, Enhancer of zeste, and Trithorax) domain protein superfamily and plays important roles in hypoxic pulmonary hypertension, muscle differentiation, and carcinogenesis. Previously, we identified SETD3 as the actin-specific methyltransferase that methylates the N3 of His73 on β-actin (Kwiatkowski et al., 2018). Here, we present two structures of S-adenosyl-L-homocysteine-bound SETD3 in complex with either an unmodified β-actin peptide or its His-methylated variant. Structural analyses, supported by biochemical experiments and enzyme activity assays, indicate that the recognition and methylation of β-actin by SETD3 are highly sequence specific, and that both SETD3 and β-actin adopt pronounced conformational changes upon binding to each other. In conclusion, this study is the first to show a catalytic mechanism of SETD3-mediated histidine methylation on β-actin, which not only throws light on the protein histidine methylation phenomenon but also facilitates the design of small molecule inhibitors of SETD3.
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Affiliation(s)
- Qiong Guo
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Shanhui Liao
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Sebastian Kwiatkowski
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Weronika Tomaka
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Huijuan Yu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Gao Wu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Xiaoming Tu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Jinrong Min
- Structural Genomics Consortium, University of Toronto, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Jakub Drozak
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Chao Xu
- Division of Molecular and Cellular Biophysics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
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47
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Upadhyay AK, Sowdhamini R. Genome-Wide Analysis of Domain-Swap Predicted Products in the Genome of Anti-Stress Medicinal Plant: Ocimum tenuiflorum. Bioinform Biol Insights 2019; 13:1177932218821362. [PMID: 30692846 PMCID: PMC6335655 DOI: 10.1177/1177932218821362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/08/2018] [Indexed: 11/18/2022] Open
Abstract
Computational approaches to high-throughput data are gaining importance because
of explosion of sequences in the post-genomic era. This explosion of sequence
data creates a huge gap among the domains of sequence structure and function,
since the experimental techniques to determine the structure and function are
very expensive, time taking, and laborious in nature. Therefore, there is an
urgent need to emphasize on the development of computational approaches in the
field of biological systems. Engagement of proteins in quaternary arrangements,
such as domain swapping, might be relevant for higher compatibility of such
genes at stress conditions. In this study, the capacity to engage in domain
swapping was predicted from mere sequence information in the whole genome of
holy Basil (Ocimum tenuiflorum), which is well known to be an
anti-stress agent. Approximately, one-fourth of the proteins of O
tenuiflorum are predicted to undergo three-dimensional (3D)-domain
swapping. Furthermore, function annotation was carried out on all the predicted
domain-swap sequences from the O tenuiflorum and
Arabidopsis thaliana for their distribution in different
Pfam protein families and gene ontology (GO) terms. These domain-swapped protein
sequences are associated with many Pfam protein families with a wide range of GO
annotation terms. A comparative analysis of domain-swap-predicted sequences in
O tenuiflorum with gene products in A
thaliana reveals that around 26% (2522 sequences) are close
homologues across the 2 genomes. Functional annotation of predicted
domain-swapped sequences infers that predicted domain-swap sequences are
involved in diverse molecular functions, such as in gene regulation of abiotic
stress conditions and adaptation to different environmental niches. Finally, the
positively predicted sequences of A thaliana and O
tenuiflorum were also examined for their presence in stress
regulome, as recorded in our STIFDB database, to check the involvement of these
proteins in different abiotic stresses.
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Affiliation(s)
- Atul Kumar Upadhyay
- National Centre for Biological Sciences (TIFR), GKVK Campus, Bangalore, India.,Division of Bioinformatics, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, India
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48
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Riaz S, Sui Z, Niaz Z, Khan S, Liu Y, Liu H. Distinctive Nuclear Features of Dinoflagellates with A Particular Focus on Histone and Histone-Replacement Proteins. Microorganisms 2018; 6:E128. [PMID: 30558155 PMCID: PMC6313786 DOI: 10.3390/microorganisms6040128] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 11/29/2018] [Accepted: 12/11/2018] [Indexed: 11/30/2022] Open
Abstract
Dinoflagellates are important eukaryotic microorganisms that play critical roles as producers and grazers, and cause harmful algal blooms. The unusual nuclei of dinoflagellates "dinokaryon" have led researchers to investigate their enigmatic nuclear features. Their nuclei are unusual in terms of their permanently condensed nucleosome-less chromatin, immense genome, low protein to DNA ratio, guanine-cytosine rich methylated DNA, and unique mitosis process. Furthermore, dinoflagellates are the only known group of eukaryotes that apparently lack histone proteins. Over the course of evolution, dinoflagellates have recruited other proteins, e.g., histone-like proteins (HLPs), from bacteria and dinoflagellates/viral nucleoproteins (DVNPs) from viruses as histone substitutes. Expression diversity of these nucleoproteins has greatly influenced the chromatin structure and gene expression regulation in dinoflagellates. Histone replacement proteins (HLPs and DVNPs) are hypothesized to perform a few similar roles as histone proteins do in other eukaryotes, i.e., gene expression regulation and repairing DNA. However, their role in bulk packaging of DNA is not significant as low amounts of proteins are associated with the gigantic genome. This review intends to summarize the discoveries encompassing unique nuclear features of dinoflagellates, particularly focusing on histone and histone replacement proteins. In addition, a comprehensive view of the evolution of dinoflagellate nuclei is presented.
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Affiliation(s)
- Sadaf Riaz
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China.
- Department of Microbiology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan.
| | - Zhenghong Sui
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China.
| | - Zeeshan Niaz
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China.
- Department of Microbiology, Hazara University, Mansehra 21120, Pakistan.
| | - Sohrab Khan
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China.
- Department of Microbiology, Hazara University, Mansehra 21120, Pakistan.
| | - Yuan Liu
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China.
| | - Haoxin Liu
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China.
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49
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A P, Xu X, Wang C, Yang J, Wang S, Dai J, Ye L. EZH2 promotes DNA replication by stabilizing interaction of POLδ and PCNA via methylation-mediated PCNA trimerization. Epigenetics Chromatin 2018; 11:44. [PMID: 30071900 PMCID: PMC6071395 DOI: 10.1186/s13072-018-0213-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 07/25/2018] [Indexed: 12/14/2022] Open
Abstract
Background Proliferating cell nuclear antigen (PCNA), a ring-shaped homotrimer complex, promotes DNA replication via binding to DNA polymerase. Trimerized PCNA is critical for DNA replication. Enhancer of zeste homologue 2 (EZH2), which primarily acts as a histone methyltransferase, is essential for proliferation. However, how EZH2 promotes proliferation by controlling DNA replication through PCNA remains elusive. Results Here, we showed that low EZH2 levels repressed the proliferation of human dental pulp cells (hDPCs). The EZH2 protein level was dramatically upregulated in hDPCs at S phase in the absence of H3K27 trimethylation. Molecularly, EZH2 interacted with PCNA via the PIP box and dimethylated PCNA at lysine 110. Dimethylation of PCNA is essential for stabilization of the PCNA trimer and the binding of DNA polymerase δ to PCNA. Conclusions Our data reveal the direct interaction between PCNA and EZH2 and a novel mechanism by which EZH2 orchestrates genome duplication. Electronic supplementary material The online version of this article (10.1186/s13072-018-0213-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Peng A
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Xinyi Xu
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Chenglin Wang
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Jing Yang
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Shida Wang
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Jiewen Dai
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Ling Ye
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, People's Republic of China.
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50
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Abstract
Protein lysine methylation is a distinct posttranslational modification that causes minimal changes in the size and electrostatic status of lysine residues. Lysine methylation plays essential roles in regulating fates and functions of target proteins in an epigenetic manner. As a result, substrates and degrees (free versus mono/di/tri) of protein lysine methylation are orchestrated within cells by balanced activities of protein lysine methyltransferases (PKMTs) and demethylases (KDMs). Their dysregulation is often associated with neurological disorders, developmental abnormalities, or cancer. Methyllysine-containing proteins can be recognized by downstream effector proteins, which contain methyllysine reader domains, to relay their biological functions. While numerous efforts have been made to annotate biological roles of protein lysine methylation, limited work has been done to uncover mechanisms associated with this modification at a molecular or atomic level. Given distinct biophysical and biochemical properties of methyllysine, this review will focus on chemical and biochemical aspects in addition, recognition, and removal of this posttranslational mark. Chemical and biophysical methods to profile PKMT substrates will be discussed along with classification of PKMT inhibitors for accurate perturbation of methyltransferase activities. Semisynthesis of methyllysine-containing proteins will also be covered given the critical need for these reagents to unambiguously define functional roles of protein lysine methylation.
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Affiliation(s)
- Minkui Luo
- Chemical Biology Program , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States.,Program of Pharmacology, Weill Graduate School of Medical Science , Cornell University , New York , New York 10021 , United States
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