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Chen F, He X, Xu W, Zhou L, Liu Q, Chen W, Zhu WG, Zhang J. Chromatin lysine acylation: On the path to chromatin homeostasis and genome integrity. Cancer Sci 2024. [PMID: 39155589 DOI: 10.1111/cas.16321] [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: 06/06/2024] [Revised: 07/25/2024] [Accepted: 08/06/2024] [Indexed: 08/20/2024] Open
Abstract
The fundamental role of cells in safeguarding the genome's integrity against DNA double-strand breaks (DSBs) is crucial for maintaining chromatin homeostasis and the overall genomic stability. Aberrant responses to DNA damage, known as DNA damage responses (DDRs), can result in genomic instability and contribute significantly to tumorigenesis. Unraveling the intricate mechanisms underlying DDRs following severe damage holds the key to identify therapeutic targets for cancer. Chromatin lysine acylation, encompassing diverse modifications such as acetylation, lactylation, crotonylation, succinylation, malonylation, glutarylation, propionylation, and butyrylation, has been extensively studied in the context of DDRs and chromatin homeostasis. Here, we delve into the modifying enzymes and the pivotal roles of lysine acylation and their crosstalk in maintaining chromatin homeostasis and genome integrity in response to DDRs. Moreover, we offer a comprehensive perspective and overview of the latest insights, driven primarily by chromatin acylation modification and associated regulators.
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Affiliation(s)
- Feng Chen
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
| | - Xingkai He
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
| | - Wenchao Xu
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
| | - Linmin Zhou
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
| | - Qi Liu
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Weicheng Chen
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
| | - Wei-Guo Zhu
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
| | - Jun Zhang
- International Cancer Center, Guangdong Key Laboratory of Genome Instability and Human Disease Prevention, Marshall Laboratory of Biomedical Engineering, Department of Biochemistry and Molecular Biology, Shenzhen University Medical School, Shenzhen, China
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2
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Dabin J, Giacomini G, Petit E, Polo SE. New facets in the chromatin-based regulation of genome maintenance. DNA Repair (Amst) 2024; 140:103702. [PMID: 38878564 DOI: 10.1016/j.dnarep.2024.103702] [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: 04/09/2024] [Revised: 05/30/2024] [Accepted: 06/02/2024] [Indexed: 07/13/2024]
Abstract
The maintenance of genome integrity by DNA damage response machineries is key to protect cells against pathological development. In cell nuclei, these genome maintenance machineries operate in the context of chromatin, where the DNA wraps around histone proteins. Here, we review recent findings illustrating how the chromatin substrate modulates genome maintenance mechanisms, focusing on the regulatory role of histone variants and post-translational modifications. In particular, we discuss how the pre-existing chromatin landscape impacts DNA damage formation and guides DNA repair pathway choice, and how DNA damage-induced chromatin alterations control DNA damage signaling and repair, and DNA damage segregation through cell divisions. We also highlight that pathological alterations of histone proteins may trigger genome instability by impairing chromosome segregation and DNA repair, thus defining new oncogenic mechanisms and opening up therapeutic options.
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Affiliation(s)
- Juliette Dabin
- Epigenetics and Cell Fate Centre, UMR7216 CNRS Université Paris Cité, Paris, France
| | - Giulia Giacomini
- Epigenetics and Cell Fate Centre, UMR7216 CNRS Université Paris Cité, Paris, France
| | - Eliane Petit
- Epigenetics and Cell Fate Centre, UMR7216 CNRS Université Paris Cité, Paris, France
| | - Sophie E Polo
- Epigenetics and Cell Fate Centre, UMR7216 CNRS Université Paris Cité, Paris, France.
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3
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Liu W, Kurkewich JL, Stoddart A, Khan S, Anandan D, Gaubil AN, Wolfgeher DJ, Jueng L, Kron SJ, McNerney ME. CUX1 regulates human hematopoietic stem cell chromatin accessibility via the BAF complex. Cell Rep 2024; 43:114227. [PMID: 38735044 PMCID: PMC11163479 DOI: 10.1016/j.celrep.2024.114227] [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: 07/27/2023] [Revised: 03/16/2024] [Accepted: 04/26/2024] [Indexed: 05/14/2024] Open
Abstract
CUX1 is a homeodomain-containing transcription factor that is essential for the development and differentiation of multiple tissues. CUX1 is recurrently mutated or deleted in cancer, particularly in myeloid malignancies. However, the mechanism by which CUX1 regulates gene expression and differentiation remains poorly understood, creating a barrier to understanding the tumor-suppressive functions of CUX1. Here, we demonstrate that CUX1 directs the BAF chromatin remodeling complex to DNA to increase chromatin accessibility in hematopoietic cells. CUX1 preferentially regulates lineage-specific enhancers, and CUX1 target genes are predictive of cell fate in vivo. These data indicate that CUX1 regulates hematopoietic lineage commitment and homeostasis via pioneer factor activity, and CUX1 deficiency disrupts these processes in stem and progenitor cells, facilitating transformation.
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Affiliation(s)
- Weihan Liu
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA; Committee on Cancer Biology, The University of Chicago, Chicago, IL 60637, USA
| | | | - Angela Stoddart
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Saira Khan
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Dhivyaa Anandan
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Alexandre N Gaubil
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Donald J Wolfgeher
- Department of Molecular Genetics and Cell Biology, The University of Chicago, Chicago, IL 60637, USA
| | - Lia Jueng
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Stephen J Kron
- The University of Chicago Medicine Comprehensive Cancer Center, The University of Chicago, Chicago, IL 60637, USA; Committee on Cancer Biology, The University of Chicago, Chicago, IL 60637, USA; Department of Molecular Genetics and Cell Biology, The University of Chicago, Chicago, IL 60637, USA
| | - Megan E McNerney
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA; The University of Chicago Medicine Comprehensive Cancer Center, The University of Chicago, Chicago, IL 60637, USA; Committee on Cancer Biology, The University of Chicago, Chicago, IL 60637, USA; Department of Pediatrics, Section of Hematology/Oncology, The University of Chicago, Chicago, IL 60637, USA.
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4
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Vishnevsky OV, Bocharnikov AV, Ignatieva EV. Peak Scores Significantly Depend on the Relationships between Contextual Signals in ChIP-Seq Peaks. Int J Mol Sci 2024; 25:1011. [PMID: 38256085 PMCID: PMC10816497 DOI: 10.3390/ijms25021011] [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: 10/31/2023] [Revised: 12/13/2023] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
Chromatin immunoprecipitation followed by massively parallel DNA sequencing (ChIP-seq) is a central genome-wide method for in vivo analyses of DNA-protein interactions in various cellular conditions. Numerous studies have demonstrated the complex contextual organization of ChIP-seq peak sequences and the presence of binding sites for transcription factors in them. We assessed the dependence of the ChIP-seq peak score on the presence of different contextual signals in the peak sequences by analyzing these sequences from several ChIP-seq experiments using our fully enumerative GPU-based de novo motif discovery method, Argo_CUDA. Analysis revealed sets of significant IUPAC motifs corresponding to the binding sites of the target and partner transcription factors. For these ChIP-seq experiments, multiple regression models were constructed, demonstrating a significant dependence of the peak scores on the presence in the peak sequences of not only highly significant target motifs but also less significant motifs corresponding to the binding sites of the partner transcription factors. A significant correlation was shown between the presence of the target motifs FOXA2 and the partner motifs HNF4G, which found experimental confirmation in the scientific literature, demonstrating the important contribution of the partner transcription factors to the binding of the target transcription factor to DNA and, consequently, their important contribution to the peak score.
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Affiliation(s)
- Oleg V. Vishnevsky
- Institute of Cytology and Genetics, 630090 Novosibirsk, Russia;
- Department of Natural Science, Novosibirsk State University, 630090 Novosibirsk, Russia;
| | - Andrey V. Bocharnikov
- Department of Natural Science, Novosibirsk State University, 630090 Novosibirsk, Russia;
| | - Elena V. Ignatieva
- Institute of Cytology and Genetics, 630090 Novosibirsk, Russia;
- Department of Natural Science, Novosibirsk State University, 630090 Novosibirsk, Russia;
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Li J, Chen Z, Bai Y, Wei Y, Guo D, Liu Z, Niu Y, Shi B, Zhang X, Cai Y, Zhao Z, Hu J, Wang J, Liu X, Li S, Zhao F. Integration of ATAC-Seq and RNA-Seq Analysis to Identify Key Genes in the Longissimus Dorsi Muscle Development of the Tianzhu White Yak. Int J Mol Sci 2023; 25:158. [PMID: 38203329 PMCID: PMC10779322 DOI: 10.3390/ijms25010158] [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: 11/25/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
During the postnatal stages, skeletal muscle development undergoes a series of meticulously regulated alterations in gene expression. However, limited studies have employed chromatin accessibility to unravel the underlying molecular mechanisms governing muscle development in yak species. Therefore, we conducted an analysis of both gene expression levels and chromatin accessibility to comprehensively characterize the dynamic genome-wide chromatin accessibility during muscle growth and development in the Tianzhu white yak, thereby elucidating the features of accessible chromatin regions throughout this process. Initially, we compared the differences in chromatin accessibility between two groups and observed that calves exhibited higher levels of chromatin accessibility compared to adult cattle, particularly within ±2 kb of the transcription start site (TSS). In order to investigate the correlation between alterations in chromatin accessible regions and variations in gene expression levels, we employed a combination of ATAC-seq and RNA-seq techniques, leading to the identification of 18 central transcriptional factors (TFs) and 110 key genes with significant effects. Through further analysis, we successfully identified several TFs, including Sp1, YY1, MyoG, MEF2A and MEF2C, as well as a number of candidate genes (ANKRD2, ANKRD1, BTG2 and LMOD3) which may be closely associated with muscle growth and development. Moreover, we constructed an interactive network program encompassing hub TFs and key genes related to muscle growth and development. This innovative approach provided valuable insights into the molecular mechanism underlying skeletal muscle development in the postnatal stages of Tianzhu white yaks while also establishing a solid theoretical foundation for future research on yak muscle development.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Zhidong Zhao
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Jiang Hu
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
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Zhang M, Kan D, Zhang B, Chen X, Wang C, Chen S, Gao W, Yang Z, Li Y, Chen Y, Zhu S, Wen S, Niu Y, Shang Z. P300/SP1 complex mediating elevated METTL1 regulates CDK14 mRNA stability via internal m7G modification in CRPC. J Exp Clin Cancer Res 2023; 42:215. [PMID: 37599359 PMCID: PMC10440916 DOI: 10.1186/s13046-023-02777-z] [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: 04/20/2023] [Accepted: 07/24/2023] [Indexed: 08/22/2023] Open
Abstract
BACKGROUND N7-methylguanosine (m7G) modification is, a more common epigenetic modification in addition to m6A modification, mainly found in mRNA capsids, mRNA interiors, transfer RNA (tRNA), pri-miRNA, and ribosomal RNA (rRNA). It has been found that m7G modifications play an important role in mRNA transcription, tRNA stability, rRNA processing maturation, and miRNA biosynthesis. However, the role of m7G modifications within mRNA and its "writer" methyltransferase 1(METTL1) in tumors, particularly prostate cancer (PCa), has not been revealed. METHODS The differential expression level of METTL1 between hormone-sensitive prostate cancer (HSPC) and castrate-resistant prostate cancer (CRPC) was evaluated via RNA-seq and in vitro experiments. The effects of METTL1 on CRPC progression were investigated through in vitro and in vivo assays. The upstream molecular mechanism of METTL1 expression upregulation and the downstream mechanism of its action were explored via Chromatin Immunoprecipitation quantitative reverse transcription polymerase chain reaction (CHIP-qPCR), Co-immunoprecipitation (Co-IP), luciferase reporter assay, transcriptome-sequencing, m7G AlkAniline-Seq, and mRNA degradation experiments, etc. RESULTS AND CONCLUSION: Here, we found that METTL1 was elevated in CRPC and that patients with METTL1 elevation tended to have a poor prognosis. Functionally, the knockdown of METTL1 in CRPC cells significantly limited cell proliferation and invasive capacity. Mechanistically, we unveiled that P300 can form a complex with SP1 and bind to the promoter region of the METTL1 gene via SP1, thereby mediating METTL1 transcriptional upregulation in CRPC. Subsequently, our findings indicated that METTL1 leads to enhanced mRNA stability of CDK14 by adding m7G modifications inside its mRNA, ultimately promoting CRPC progression.
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Affiliation(s)
- Mingpeng Zhang
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Duo Kan
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Boya Zhang
- Bone and Soft Tissue Department, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, 450000, China
| | - Xueqiao Chen
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Chun Wang
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Songmao Chen
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Wenlong Gao
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Zhao Yang
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Yang Li
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Yutong Chen
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Shimiao Zhu
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Simeng Wen
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Yuanjie Niu
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China.
| | - Zhiqun Shang
- Tianjin Institute of Urology, the Second Hospital of Tianjin Medical University, Tianjin, 300211, China.
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Aricthota S, Rana PP, Haldar D. Histone acetylation dynamics in repair of DNA double-strand breaks. Front Genet 2022; 13:926577. [PMID: 36159966 PMCID: PMC9503837 DOI: 10.3389/fgene.2022.926577] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 08/05/2022] [Indexed: 11/17/2022] Open
Abstract
Packaging of eukaryotic genome into chromatin is a major obstacle to cells encountering DNA damage caused by external or internal agents. For maintaining genomic integrity, the double-strand breaks (DSB) must be efficiently repaired, as these are the most deleterious type of DNA damage. The DNA breaks have to be detected in chromatin context, the DNA damage response (DDR) pathways have to be activated to repair breaks either by non‐ homologous end joining and homologous recombination repair. It is becoming clearer now that chromatin is not a mere hindrance to DDR, it plays active role in sensing, detection and repair of DNA damage. The repair of DSB is governed by the reorganization of the pre-existing chromatin, leading to recruitment of specific machineries, chromatin remodelling complexes, histone modifiers to bring about dynamic alterations in histone composition, nucleosome positioning, histone modifications. In response to DNA break, modulation of chromatin occurs via various mechanisms including post-translational modification of histones. DNA breaks induce many types of histone modifications, such as phosphorylation, acetylation, methylation and ubiquitylation on specific histone residues which are signal and context dependent. DNA break induced histone modifications have been reported to function in sensing the breaks, activating processing of breaks by specific pathways, and repairing damaged DNA to ensure integrity of the genome. Favourable environment for DSB repair is created by generating open and relaxed chromatin structure. Histone acetylation mediate de-condensation of chromatin and recruitment of DSB repair proteins to their site of action at the DSB to facilitate repair. In this review, we will discuss the current understanding on the critical role of histone acetylation in inducing changes both in chromatin organization and promoting recruitment of DSB repair proteins to sites of DNA damage. It consists of an overview of function and regulation of the deacetylase enzymes which remove these marks and the function of histone acetylation and regulators of acetylation in genome surveillance.
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8
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Archer SN, Möller-Levet CS, Laing EE, Dijk DJ. Mistimed sleep and waking activity in humans disrupts glucocorticoid signalling transcripts and SP1, but not plasma cortisol rhythms. Front Physiol 2022; 13:946444. [PMID: 36060675 PMCID: PMC9428761 DOI: 10.3389/fphys.2022.946444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 06/29/2022] [Indexed: 12/05/2022] Open
Abstract
Cortisol is a robust circadian signal that synchronises peripheral circadian clocks with the central clock in the suprachiasmatic nucleus via glucocorticoid receptors that regulate peripheral gene expression. Misalignment of the cortisol rhythm with the sleep–wake cycle, as occurs in shift work, is associated with negative health outcomes, but underlying molecular mechanisms remain largely unknown. We experimentally induced misalignment between the sleep–wake cycle and melatonin and cortisol rhythms in humans and measured time series blood transcriptomics while participants slept in-phase and out-of-phase with the central clock. The cortisol rhythm remained unchanged, but many glucocorticoid signalling transcripts were disrupted by mistimed sleep. To investigate which factors drive this dissociation between cortisol and its signalling pathways, we conducted bioinformatic and temporal coherence analyses. We found that glucocorticoid signalling transcripts affected by mistimed sleep were enriched for binding sites for the transcription factor SP1. Furthermore, changes in the timing of the rhythms of SP1 transcripts, a major regulator of transcription, and changes in the timing of rhythms in transcripts of the glucocorticoid signalling pathways were closely associated. Associations between the rhythmic changes in factors that affect SP1 expression and its activity, such as STAT3, EP300, HSP90AA1, and MAPK1, were also observed. We conclude that plasma cortisol rhythms incompletely reflect the impact of mistimed sleep on glucocorticoid signalling pathways and that sleep–wake driven changes in SP1 may mediate disruption of these pathways. These results aid understanding of mechanisms by which mistimed sleep affects health.
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Affiliation(s)
- Simon N. Archer
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
- *Correspondence: Simon N. Archer,
| | - Carla S. Möller-Levet
- Bioinformatics Core Facility, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Emma E. Laing
- School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Derk-Jan Dijk
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
- UK Dementia Research Institute Care Research and Technology Centre, Imperial College London and the University of Surrey, Guildford, United Kingdom
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9
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Flashner S, Swift M, Sowash A, Fahmy AN, Azizkhan-Clifford J. Transcription factor Sp1 regulates mitotic chromosome assembly and segregation. Chromosoma 2022; 131:175-191. [PMID: 35916925 PMCID: PMC9470683 DOI: 10.1007/s00412-022-00778-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 06/14/2022] [Accepted: 07/14/2022] [Indexed: 11/30/2022]
Abstract
Aneuploidy is a pervasive feature of cancer cells that results from chromosome missegregation. Several transcription factors have been associated with aneuploidy; however, no studies to date have demonstrated that mammalian transcription factors directly regulate chromosome segregation during mitosis. Here, we demonstrate that the ubiquitously expressed transcription factor specificity protein 1 (Sp1), which we have previously linked to aneuploidy, has a mitosis-specific role regulating chromosome segregation. We find that Sp1 localizes to mitotic centromeres and auxin-induced rapid Sp1 degradation at mitotic onset results in chromosome segregation errors and aberrant mitotic progression. Furthermore, rapid Sp1 degradation results in anomalous mitotic chromosome assembly characterized by loss of condensin complex I localization to mitotic chromosomes and chromosome condensation defects. Consistent with these defects, Sp1 degradation results in reduced chromosome passenger complex activity and histone H3 serine 10 phosphorylation during mitosis, which is essential for condensin complex I recruitment and chromosome condensation. Together, these data provide the first evidence of a mammalian transcription factor acting specifically during mitosis to regulate chromosome segregation.
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Affiliation(s)
- Samuel Flashner
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, 245 N 15th Street, MS 497, Philadelphia, PA, 19102, USA
| | - Michelle Swift
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, 245 N 15th Street, MS 497, Philadelphia, PA, 19102, USA
| | - Aislinn Sowash
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, 245 N 15th Street, MS 497, Philadelphia, PA, 19102, USA
| | - Alexander N Fahmy
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, 245 N 15th Street, MS 497, Philadelphia, PA, 19102, USA
| | - Jane Azizkhan-Clifford
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, 245 N 15th Street, MS 497, Philadelphia, PA, 19102, USA.
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Song H, Shen R, Liu X, Yang X, Xie K, Guo Z, Wang D. Histone post-translational modification and the DNA damage response. Genes Dis 2022. [DOI: 10.1016/j.gendis.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Swift ML, Azizkhan-Clifford J. DNA damage-induced sumoylation of Sp1 induces its interaction with RNF4 and degradation in S phase to remove 53BP1 from DSBs and permit HR. DNA Repair (Amst) 2022; 111:103289. [DOI: 10.1016/j.dnarep.2022.103289] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/26/2022] [Accepted: 01/29/2022] [Indexed: 02/06/2023]
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