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Shilkin ES, Petrova DV, Novikova AA, Boldinova EO, Zharkov DO, Makarova AV. Methylation and hydroxymethylation of cytosine alter activity and fidelity of translesion DNA polymerases. DNA Repair (Amst) 2024; 141:103712. [PMID: 38959714 DOI: 10.1016/j.dnarep.2024.103712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/24/2024] [Accepted: 06/11/2024] [Indexed: 07/05/2024]
Abstract
Epigenetic cytosine methylation covers most of genomic CpG dinucleotides in human cells. In addition to common deamination-mediated mutagenesis at CpG sites, an alternative deamination-independent pathway associated with DNA polymerase activity was previously described. This mutagenesis is characterized by the TCG→TTG mutational signature and is believed to arise from dAMP misincorporation opposite 5-methylcytosine (mC) or its oxidized derivative 5-hydroxymethylcytosine (hmC) by B-family replicative DNA polymerases with disrupted proofreading 3→5'-exonuclease activity. In addition to being less stable and pro-mutagenic themselves, cytosine modifications also increase the risk of adjacent nucleotides damage, including the formation of 8-oxo-2'-deoxyguanosine (8-oxoG), a well-known mutagenic lesion. The effect of cytosine methylation on error-prone DNA polymerases lacking proofreading activity and involved in repair and DNA translesion synthesis remains unexplored. Here we analyze the efficiency and fidelity of translesion Y-family polymerases (Pol κ, Pol η, Pol ι and REV1) and primase-polymerase PrimPol opposite mC and hmC as well as opposite 8-oxoG adjacent to mC in the TCG context. We demonstrate that epigenetic cytosine modifications suppress Pol ι and REV1 activities and lead to increasing dAMP misincorporation by PrimPol, Pol κ and Pol ι in vitro. Cytosine methylation also increases misincorporation of dAMP opposite the adjacent 8-oxoG by PrimPol, decreases the TLS activity of Pol η opposite the lesion but increases dCMP incorporation opposite 8-oxoG by REV1. Altogether, these data suggest that methylation and hydroxymethylation of cytosine alter activity and fidelity of translesion DNA polymerases.
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Affiliation(s)
- Evgeniy S Shilkin
- Institute of Molecular Genetics, National Research Center "Kurchatov Institute", Moscow 123182, Russia; Institute of Gene Biology of Russian Academy of Sciences, Moscow 119334, Russia
| | - Daria V Petrova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 63009, Russia
| | - Anna A Novikova
- Institute of Molecular Genetics, National Research Center "Kurchatov Institute", Moscow 123182, Russia; Institute of Gene Biology of Russian Academy of Sciences, Moscow 119334, Russia
| | - Elizaveta O Boldinova
- Institute of Molecular Genetics, National Research Center "Kurchatov Institute", Moscow 123182, Russia; Institute of Gene Biology of Russian Academy of Sciences, Moscow 119334, Russia
| | - Dmitry O Zharkov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 63009, Russia.
| | - Alena V Makarova
- Institute of Molecular Genetics, National Research Center "Kurchatov Institute", Moscow 123182, Russia; Institute of Gene Biology of Russian Academy of Sciences, Moscow 119334, Russia.
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2
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Shah P, Hill R, Dion C, Clark SJ, Abakir A, Willems J, Arends MJ, Garaycoechea JI, Leitch HG, Reik W, Crossan GP. Primordial germ cell DNA demethylation and development require DNA translesion synthesis. Nat Commun 2024; 15:3734. [PMID: 38702312 PMCID: PMC11068800 DOI: 10.1038/s41467-024-47219-2] [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] [Received: 06/21/2023] [Accepted: 03/25/2024] [Indexed: 05/06/2024] Open
Abstract
Mutations in DNA damage response (DDR) factors are associated with human infertility, which affects up to 15% of the population. The DDR is required during germ cell development and meiosis. One pathway implicated in human fertility is DNA translesion synthesis (TLS), which allows replication impediments to be bypassed. We find that TLS is essential for pre-meiotic germ cell development in the embryo. Loss of the central TLS component, REV1, significantly inhibits the induction of human PGC-like cells (hPGCLCs). This is recapitulated in mice, where deficiencies in TLS initiation (Rev1-/- or PcnaK164R/K164R) or extension (Rev7 -/-) result in a > 150-fold reduction in the number of primordial germ cells (PGCs) and complete sterility. In contrast, the absence of TLS does not impact the growth, function, or homeostasis of somatic tissues. Surprisingly, we find a complete failure in both activation of the germ cell transcriptional program and in DNA demethylation, a critical step in germline epigenetic reprogramming. Our findings show that for normal fertility, DNA repair is required not only for meiotic recombination but for progression through the earliest stages of germ cell development in mammals.
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Affiliation(s)
- Pranay Shah
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK.
| | - Ross Hill
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK
| | - Camille Dion
- MRC Laboratory of Medical Sciences, London, W12 0HS, UK
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, W12 0HS, UK
| | - Stephen J Clark
- Altos Labs, Cambridge, UK
- Epigenetics Programme, The Babraham Institute, Cambridge, CB22 3AT, UK
| | - Abdulkadir Abakir
- Altos Labs, Cambridge, UK
- Epigenetics Programme, The Babraham Institute, Cambridge, CB22 3AT, UK
| | - Jeroen Willems
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, The Netherlands
| | | | - Juan I Garaycoechea
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, The Netherlands
| | - Harry G Leitch
- MRC Laboratory of Medical Sciences, London, W12 0HS, UK
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, W12 0HS, UK
| | - Wolf Reik
- Altos Labs, Cambridge, UK
- Epigenetics Programme, The Babraham Institute, Cambridge, CB22 3AT, UK
| | - Gerry P Crossan
- MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK.
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3
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Petljak M, Dananberg A, Chu K, Bergstrom EN, Striepen J, von Morgen P, Chen Y, Shah H, Sale JE, Alexandrov LB, Stratton MR, Maciejowski J. Mechanisms of APOBEC3 mutagenesis in human cancer cells. Nature 2022; 607:799-807. [PMID: 35859169 PMCID: PMC9329121 DOI: 10.1038/s41586-022-04972-y] [Citation(s) in RCA: 90] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 06/13/2022] [Indexed: 02/07/2023]
Abstract
The APOBEC3 family of cytosine deaminases has been implicated in some of the most prevalent mutational signatures in cancer1-3. However, a causal link between endogenous APOBEC3 enzymes and mutational signatures in human cancer genomes has not been established, leaving the mechanisms of APOBEC3 mutagenesis poorly understood. Here, to investigate the mechanisms of APOBEC3 mutagenesis, we deleted implicated genes from human cancer cell lines that naturally generate APOBEC3-associated mutational signatures over time4. Analysis of non-clustered and clustered signatures across whole-genome sequences from 251 breast, bladder and lymphoma cancer cell line clones revealed that APOBEC3A deletion diminished APOBEC3-associated mutational signatures. Deletion of both APOBEC3A and APOBEC3B further decreased APOBEC3 mutation burdens, without eliminating them. Deletion of APOBEC3B increased APOBEC3A protein levels, activity and APOBEC3A-mediated mutagenesis in some cell lines. The uracil glycosylase UNG was required for APOBEC3-mediated transversions, whereas the loss of the translesion polymerase REV1 decreased overall mutation burdens. Together, these data represent direct evidence that endogenous APOBEC3 deaminases generate prevalent mutational signatures in human cancer cells. Our results identify APOBEC3A as the main driver of these mutations, indicate that APOBEC3B can restrain APOBEC3A-dependent mutagenesis while contributing its own smaller mutation burdens and dissect mechanisms that translate APOBEC3 activities into distinct mutational signatures.
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Affiliation(s)
- Mia Petljak
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
| | - Alexandra Dananberg
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Kevan Chu
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Erik N Bergstrom
- Department of Cellular and Molecular Medicine, UC San Diego, La Jolla, CA, USA.,Department of Bioengineering, UC San Diego, La Jolla, CA, USA.,Moores Cancer Center, UC San Diego, La Jolla, CA, USA
| | - Josefine Striepen
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Patrick von Morgen
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Yanyang Chen
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Hina Shah
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Julian E Sale
- Division of Protein & Nucleic Acid Chemistry, Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.,Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK
| | - Ludmil B Alexandrov
- Department of Cellular and Molecular Medicine, UC San Diego, La Jolla, CA, USA.,Department of Bioengineering, UC San Diego, La Jolla, CA, USA.,Moores Cancer Center, UC San Diego, La Jolla, CA, USA
| | - Michael R Stratton
- Cancer, Ageing and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK.
| | - John Maciejowski
- Molecular Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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4
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Chen D, Gervai JZ, Póti Á, Németh E, Szeltner Z, Szikriszt B, Gyüre Z, Zámborszky J, Ceccon M, d'Adda di Fagagna F, Szallasi Z, Richardson AL, Szüts D. BRCA1 deficiency specific base substitution mutagenesis is dependent on translesion synthesis and regulated by 53BP1. Nat Commun 2022; 13:226. [PMID: 35017534 PMCID: PMC8752635 DOI: 10.1038/s41467-021-27872-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 12/15/2021] [Indexed: 12/25/2022] Open
Abstract
Defects in BRCA1, BRCA2 and other genes of the homology-dependent DNA repair (HR) pathway cause an elevated rate of mutagenesis, eliciting specific mutation patterns including COSMIC signature SBS3. Using genome sequencing of knock-out cell lines we show that Y family translesion synthesis (TLS) polymerases contribute to the spontaneous generation of base substitution and short insertion/deletion mutations in BRCA1 deficient cells, and that TLS on DNA adducts is increased in BRCA1 and BRCA2 mutants. The inactivation of 53BP1 in BRCA1 mutant cells markedly reduces TLS-specific mutagenesis, and rescues the deficiency of template switch-mediated gene conversions in the immunoglobulin V locus of BRCA1 mutant chicken DT40 cells. 53BP1 also promotes TLS in human cellular extracts in vitro. Our results show that HR deficiency-specific mutagenesis is largely caused by TLS, and suggest a function for 53BP1 in regulating the choice between TLS and error-free template switching in replicative DNA damage bypass.
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Affiliation(s)
- Dan Chen
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Judit Z Gervai
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Ádám Póti
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Eszter Németh
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Zoltán Szeltner
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Bernadett Szikriszt
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Zsolt Gyüre
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
- Doctoral School of Molecular Medicine, Semmelweis University, Budapest, H-1085, Hungary
| | - Judit Zámborszky
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary
| | - Marta Ceccon
- IFOM Foundation-FIRC Institute of Molecular Oncology Foundation, Via Adamello 16, 20139, Milan, Italy
| | - Fabrizio d'Adda di Fagagna
- IFOM Foundation-FIRC Institute of Molecular Oncology Foundation, Via Adamello 16, 20139, Milan, Italy
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche (IGM-CNR), Via Abbiategrasso 207, 27100, Pavia, Italy
| | - Zoltan Szallasi
- Computational Health Informatics Program (CHIP), Boston Children's Hospital and Harvard Medical School, Boston, MA, 02215, USA
- Danish Cancer Society Research Center, Copenhagen, 2100, Denmark
- SE-NAP, Brain Metastasis Research Group, 2nd Department of Pathology, Semmelweis University, Budapest, H-1092, Hungary
| | | | - Dávid Szüts
- Institute of Enzymology, Research Centre for Natural Sciences, Budapest, H-1117, Hungary.
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5
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Lerksuthirat T, Wikiniyadhanee R, Stitchantrakul W, Chitphuk S, Stansook N, Pipatpanyanugoon N, Jirawatnotai S, Dejsuphong D. A DNA repair player, ring finger protein 43, relieves etoposide-induced topoisomerase II poisoning. Genes Cells 2020; 25:718-729. [PMID: 32939879 DOI: 10.1111/gtc.12808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 08/15/2020] [Accepted: 09/06/2020] [Indexed: 12/25/2022]
Abstract
Ring finger protein 43 (RNF43) is an E3 ubiquitin ligase which is well-known for its role in negative regulation of the Wnt-signaling pathway. However, the function in DNA double-strand break repairs has not been investigated. In this study, we used a lymphoblast cell line, DT40, and mouse embryonic fibroblast as cellular models to study DNA double-strand break (DSB) repairs. For this purpose, we created RNF43 knockout, RNF43-/- DT40 cell line to investigate DSB repairs. We found that deletion of RNF43 does not interfere with cell proliferation. However, after exposure to various types of DNA-damaging agents, RNF43-/- cells become more sensitive to topoisomerase II inhibitors, etoposide, and ICRF193, than wild type cells. Our results also showed that depletion of RNF43 results in apoptosis upon etoposide-mediated DNA damage. The delay in resolution of γH2AX and 53BP1 foci formation after etoposide treatment, as well as epistasis analysis with DNAPKcs, suggested that RNF43 might participate in DNA repair of etoposide-induced DSB via non-homologous end joining. Disturbed γH2AX foci formation in MEFs following pulse etoposide treatment supported the notion that RNF43 also functions DNA repair in mammalian cells. These findings propose two possible functions of RNF43, either participating in NHEJ or removing the blockage of 5' topo II adducts from DSB ends.
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Affiliation(s)
- Tassanee Lerksuthirat
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Rakkreat Wikiniyadhanee
- Section for Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Wasana Stitchantrakul
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sermsiri Chitphuk
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nauljun Stansook
- Division of Radiotherapy and Oncology, Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nut Pipatpanyanugoon
- Siriraj Center of Research for Excellence (SiCORE) for Systems Pharmacology, Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Siwanon Jirawatnotai
- Siriraj Center of Research for Excellence (SiCORE) for Systems Pharmacology, Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Donniphat Dejsuphong
- Section for Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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6
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Lerner LK, Holzer S, Kilkenny ML, Šviković S, Murat P, Schiavone D, Eldridge CB, Bittleston A, Maman JD, Branzei D, Stott K, Pellegrini L, Sale JE. Timeless couples G-quadruplex detection with processing by DDX11 helicase during DNA replication. EMBO J 2020; 39:e104185. [PMID: 32705708 PMCID: PMC7506991 DOI: 10.15252/embj.2019104185] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 12/27/2022] Open
Abstract
Regions of the genome with the potential to form secondary DNA structures pose a frequent and significant impediment to DNA replication and must be actively managed in order to preserve genetic and epigenetic integrity. How the replisome detects and responds to secondary structures is poorly understood. Here, we show that a core component of the fork protection complex in the eukaryotic replisome, Timeless, harbours in its C-terminal region a previously unappreciated DNA-binding domain that exhibits specific binding to G-quadruplex (G4) DNA structures. We show that this domain contributes to maintaining processive replication through G4-forming sequences, and exhibits partial redundancy with an adjacent PARP-binding domain. Further, this function of Timeless requires interaction with and activity of the helicase DDX11. Loss of both Timeless and DDX11 causes epigenetic instability at G4-forming sequences and DNA damage. Our findings indicate that Timeless contributes to the ability of the replisome to sense replication-hindering G4 formation and ensures the prompt resolution of these structures by DDX11 to maintain processive DNA synthesis.
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Affiliation(s)
- Leticia K Lerner
- MRC Laboratory of Molecular BiologyCambridgeUK
- Present address:
Centre de Recherche des CordeliersCell Death and Drug Resistance in Hematological Disorders TeamINSERM UMRS 1138Sorbonne UniversitéParisFrance
| | - Sandro Holzer
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | | | | | | | | | | | | | - Joseph D Maman
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - Dana Branzei
- IFOMFondazione Italiana per la Ricerca sul CancroInstitute of Molecular OncologyMilanItaly
| | - Katherine Stott
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - Luca Pellegrini
- Department of BiochemistryUniversity of CambridgeCambridgeUK
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7
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Thompson PS, Cortez D. New insights into abasic site repair and tolerance. DNA Repair (Amst) 2020; 90:102866. [PMID: 32417669 PMCID: PMC7299775 DOI: 10.1016/j.dnarep.2020.102866] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/21/2020] [Accepted: 04/21/2020] [Indexed: 12/13/2022]
Abstract
Thousands of apurinic/apyrimidinic (AP or abasic) sites form in each cell, each day. This simple DNA lesion can have profound consequences to cellular function, genome stability, and disease. As potent blocks to polymerases, they interfere with the reading and copying of the genome. Since they provide no coding information, they are potent sources of mutation. Due to their reactive chemistry, they are intermediates in the formation of lesions that are more challenging to repair including double-strand breaks, interstrand crosslinks, and DNA protein crosslinks. Given their prevalence and deleterious consequences, cells have multiple mechanisms of repairing and tolerating these lesions. While base excision repair of abasic sites in double-strand DNA has been studied for decades, new interest in abasic site processing has come from more recent insights into how they are processed in single-strand DNA. In this review, we discuss the source of abasic sites, their biological consequences, tolerance mechanisms, and how they are repaired in double and single-stranded DNA.
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Affiliation(s)
- Petria S Thompson
- Vanderbilt University School of Medicine, Department of Biochemistry, Nashville, TN, 37232, USA
| | - David Cortez
- Vanderbilt University School of Medicine, Department of Biochemistry, Nashville, TN, 37232, USA.
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8
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Taylor SJ, Arends MJ, Langdon SP. Inhibitors of the Fanconi anaemia pathway as potential antitumour agents for ovarian cancer. EXPLORATION OF TARGETED ANTI-TUMOR THERAPY 2020; 1:26-52. [PMID: 36046263 PMCID: PMC9400734 DOI: 10.37349/etat.2020.00003] [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: 10/24/2019] [Accepted: 12/18/2019] [Indexed: 11/30/2022] Open
Abstract
The Fanconi anaemia (FA) pathway is an important mechanism for cellular DNA damage repair, which functions to remove toxic DNA interstrand crosslinks. This is particularly relevant in the context of ovarian and other cancers which rely extensively on interstrand cross-link generating platinum chemotherapy as standard of care treatment. These cancers often respond well to initial treatment, but reoccur with resistant disease and upregulation of DNA damage repair pathways. The FA pathway is therefore of great interest as a target for therapies that aim to improve the efficacy of platinum chemotherapies, and reverse tumour resistance to these. In this review, we discuss recent advances in understanding the mechanism of interstrand cross-link repair by the FA pathway, and the potential of the component parts as targets for therapeutic agents. We then focus on the current state of play of inhibitor development, covering both the characterisation of broad spectrum inhibitors and high throughput screening approaches to identify novel small molecule inhibitors. We also consider synthetic lethality between the FA pathway and other DNA damage repair pathways as a therapeutic approach.
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Affiliation(s)
- Sarah J Taylor
- Cancer Research UK Edinburgh Centre and Edinburgh Pathology, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, EH4 2XU Edinburgh, UK
| | - Mark J Arends
- Cancer Research UK Edinburgh Centre and Edinburgh Pathology, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, EH4 2XU Edinburgh, UK
| | - Simon P Langdon
- Cancer Research UK Edinburgh Centre and Edinburgh Pathology, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, EH4 2XU Edinburgh, UK
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9
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Martin SK, Wood RD. DNA polymerase ζ in DNA replication and repair. Nucleic Acids Res 2019; 47:8348-8361. [PMID: 31410467 PMCID: PMC6895278 DOI: 10.1093/nar/gkz705] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/24/2019] [Accepted: 08/08/2019] [Indexed: 12/22/2022] Open
Abstract
Here, we survey the diverse functions of DNA polymerase ζ (pol ζ) in eukaryotes. In mammalian cells, REV3L (3130 residues) is the largest catalytic subunit of the DNA polymerases. The orthologous subunit in yeast is Rev3p. Pol ζ also includes REV7 subunits (encoded by Rev7 in yeast and MAD2L2 in mammalian cells) and two subunits shared with the replicative DNA polymerase, pol δ. Pol ζ is used in response to circumstances that stall DNA replication forks in both yeast and mammalian cells. The best-examined situation is translesion synthesis at sites of covalent DNA lesions such as UV radiation-induced photoproducts. We also highlight recent evidence that uncovers various roles of pol ζ that extend beyond translesion synthesis. For instance, pol ζ is also employed when the replisome operates sub-optimally or at difficult-to-replicate DNA sequences. Pol ζ also participates in repair by microhomology mediated break-induced replication. A rev3 deletion is tolerated in yeast but Rev3l disruption results in embryonic lethality in mice. Inactivation of mammalian Rev3l results in genomic instability and invokes cell death and senescence programs. Targeting of pol ζ function may be a useful strategy in cancer therapy, although chromosomal instability associated with pol ζ deficiency must be considered.
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Affiliation(s)
- Sara K Martin
- Department of Epigenetics & Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA and The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences
| | - Richard D Wood
- Department of Epigenetics & Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA and The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences
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10
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Quinet A, Tirman S, Jackson J, Šviković S, Lemaçon D, Carvajal-Maldonado D, González-Acosta D, Vessoni AT, Cybulla E, Wood M, Tavis S, Batista LFZ, Méndez J, Sale JE, Vindigni A. PRIMPOL-Mediated Adaptive Response Suppresses Replication Fork Reversal in BRCA-Deficient Cells. Mol Cell 2019; 77:461-474.e9. [PMID: 31676232 PMCID: PMC7007862 DOI: 10.1016/j.molcel.2019.10.008] [Citation(s) in RCA: 142] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 07/29/2019] [Accepted: 10/07/2019] [Indexed: 12/20/2022]
Abstract
Acute treatment with replication-stalling chemotherapeutics causes reversal of replication forks. BRCA proteins protect reversed forks from nucleolytic degradation, and their loss leads to chemosensitivity. Here, we show that fork degradation is no longer detectable in BRCA1-deficient cancer cells exposed to multiple cisplatin doses, mimicking a clinical treatment regimen. This effect depends on increased expression and chromatin loading of PRIMPOL and is regulated by ATR activity. Electron microscopy and single-molecule DNA fiber analyses reveal that PRIMPOL rescues fork degradation by reinitiating DNA synthesis past DNA lesions. PRIMPOL repriming leads to accumulation of ssDNA gaps while suppressing fork reversal. We propose that cells adapt to repeated cisplatin doses by activating PRIMPOL repriming under conditions that would otherwise promote pathological reversed fork degradation. This effect is generalizable to other conditions of impaired fork reversal (e.g., SMARCAL1 loss or PARP inhibition) and suggests a new strategy to modulate cisplatin chemosensitivity by targeting the PRIMPOL pathway. Multiple cisplatin doses suppress reversed fork degradation in BRCA-deficient cells The PRIMPOL adaptive response suppresses fork reversal and leads to ssDNA gaps The ATR kinase regulates the PRIMPOL-mediated adaptive response Impaired fork reversal shifts the balance toward PRIMPOL-mediated repriming
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Affiliation(s)
- Annabel Quinet
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA
| | - Stephanie Tirman
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA; Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Jessica Jackson
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA
| | - Saša Šviković
- Division of Protein & Nucleic Acid Chemistry, Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Delphine Lemaçon
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Denisse Carvajal-Maldonado
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | | | - Alexandre T Vessoni
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Emily Cybulla
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA; Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Matthew Wood
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA; Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Steven Tavis
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA
| | - Luis F Z Batista
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Juan Méndez
- Spanish National Cancer Research Centre (CNIO), Madrid 28029, Spain
| | - Julian E Sale
- Division of Protein & Nucleic Acid Chemistry, Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Alessandro Vindigni
- Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110, USA; Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA.
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11
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Hirth G, Svensson CM, Böttcher K, Ullrich S, Figge MT, Jungnickel B. Regulation of the Germinal Center Reaction and Somatic Hypermutation Dynamics by Homologous Recombination. THE JOURNAL OF IMMUNOLOGY 2019; 203:1493-1501. [DOI: 10.4049/jimmunol.1900483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/04/2019] [Indexed: 01/09/2023]
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12
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Niu X, Chen W, Bi T, Lu M, Qin Z, Xiao W. Rev1 plays central roles in mammalian DNA-damage tolerance in response to UV irradiation. FEBS J 2019; 286:2711-2725. [PMID: 30963698 DOI: 10.1111/febs.14840] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 12/18/2018] [Accepted: 04/03/2019] [Indexed: 11/28/2022]
Abstract
Rev1, a Y-family DNA polymerase, is involved in the tolerance of DNA damage by translesion DNA synthesis (TLS). Previous studies have shown that the C-terminal domain (CTD) and ubiquitin (Ub)-binding (UBM) domains of Rev1 play important roles in UV-damage tolerance, but how these domains contribute to the process remains unclear. In this study, we created Ub mutations in a proliferating cell nuclear antigen (PCNA)-Ub fusion that differentially affect its interaction with Rev1 and Polη and found that UV-damage tolerance depends on its interaction with Rev1 but not Polη. We also created Rev1-UBM mutations altering its interaction with a PCNA-Ub fusion and Rev1-CTD mutations affecting its interaction with Polη and the Rev7 subunit of Polζ. We thus demonstrated that elevated expression of Rev1 alone is sufficient to confer enhanced UV-damage tolerance and that this tolerance depends on its physical interaction with monoubiquitinated PCNA and Polζ but is independent of Polη. Collectively, these studies reveal central roles played by Rev1 in coordinating UV-damage response pathway choice in mammalian cells.
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Affiliation(s)
- Xiaohong Niu
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, China
| | - Wangyang Chen
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, China
| | - Tonghui Bi
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, China
| | - Mengxue Lu
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, China
| | - Zhoushuai Qin
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, China
| | - Wei Xiao
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, China.,Department of Microbiology and Immunology, University of Saskatchewan, Saskatoon, Canada
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13
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Abe T, Branzei D, Hirota K. DNA Damage Tolerance Mechanisms Revealed from the Analysis of Immunoglobulin V Gene Diversification in Avian DT40 Cells. Genes (Basel) 2018; 9:genes9120614. [PMID: 30544644 PMCID: PMC6316486 DOI: 10.3390/genes9120614] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/26/2018] [Accepted: 11/30/2018] [Indexed: 01/19/2023] Open
Abstract
DNA replication is an essential biochemical reaction in dividing cells that frequently stalls at damaged sites. Homologous/homeologous recombination (HR)-mediated template switch and translesion DNA synthesis (TLS)-mediated bypass processes release arrested DNA replication forks. These mechanisms are pivotal for replication fork maintenance and play critical roles in DNA damage tolerance (DDT) and gap-filling. The avian DT40 B lymphocyte cell line provides an opportunity to examine HR-mediated template switch and TLS triggered by abasic sites by sequencing the constitutively diversifying immunoglobulin light-chain variable gene (IgV). During IgV diversification, activation-induced deaminase (AID) converts dC to dU, which in turn is excised by uracil DNA glycosylase and yields abasic sites within a defined window of around 500 base pairs. These abasic sites can induce gene conversion with a set of homeologous upstream pseudogenes via the HR-mediated template switch, resulting in templated mutagenesis, or can be bypassed directly by TLS, resulting in non-templated somatic hypermutation at dC/dG base pairs. In this review, we discuss recent works unveiling IgV diversification mechanisms in avian DT40 cells, which shed light on DDT mode usage in vertebrate cells and tolerance of abasic sites.
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Affiliation(s)
- Takuya Abe
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minamiosawa 1-1, Hachioji-shi, Tokyo 192-0397, Japan.
- IFOM, the FIRC Institute of Molecular Oncology, Via Adamello 16, 20139 Milan, Italy.
| | - Dana Branzei
- IFOM, the FIRC Institute of Molecular Oncology, Via Adamello 16, 20139 Milan, Italy.
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche (IGM-CNR), Via Abbiategrasso 207, 27100 Pavia, Italy.
| | - Kouji Hirota
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minamiosawa 1-1, Hachioji-shi, Tokyo 192-0397, Japan.
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14
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Šviković S, Crisp A, Tan-Wong SM, Guilliam TA, Doherty AJ, Proudfoot NJ, Guilbaud G, Sale JE. R-loop formation during S phase is restricted by PrimPol-mediated repriming. EMBO J 2018; 38:embj.201899793. [PMID: 30478192 PMCID: PMC6356060 DOI: 10.15252/embj.201899793] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 10/08/2018] [Accepted: 11/06/2018] [Indexed: 12/17/2022] Open
Abstract
During DNA replication, conflicts with ongoing transcription are frequent and require careful management to avoid genetic instability. R‐loops, three‐stranded nucleic acid structures comprising a DNA:RNA hybrid and displaced single‐stranded DNA, are important drivers of damage arising from such conflicts. How R‐loops stall replication and the mechanisms that restrain their formation during S phase are incompletely understood. Here, we show in vivo how R‐loop formation drives a short purine‐rich repeat, (GAA)10, to become a replication impediment that engages the repriming activity of the primase‐polymerase PrimPol. Further, the absence of PrimPol leads to significantly increased R‐loop formation around this repeat during S phase. We extend this observation by showing that PrimPol suppresses R‐loop formation in genes harbouring secondary structure‐forming sequences, exemplified by G quadruplex and H‐DNA motifs, across the genome in both avian and human cells. Thus, R‐loops promote the creation of replication blocks at susceptible structure‐forming sequences, while PrimPol‐dependent repriming limits the extent of unscheduled R‐loop formation at these sequences, mitigating their impact on replication.
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Affiliation(s)
| | | | | | - Thomas A Guilliam
- Genome Damage & Stability Centre, School of Life Sciences, University of Sussex, Brighton, UK
| | - Aidan J Doherty
- Genome Damage & Stability Centre, School of Life Sciences, University of Sussex, Brighton, UK
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15
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Yates M, Maréchal A. Ubiquitylation at the Fork: Making and Breaking Chains to Complete DNA Replication. Int J Mol Sci 2018; 19:E2909. [PMID: 30257459 PMCID: PMC6213728 DOI: 10.3390/ijms19102909] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/20/2018] [Accepted: 09/24/2018] [Indexed: 12/11/2022] Open
Abstract
The complete and accurate replication of the genome is a crucial aspect of cell proliferation that is often perturbed during oncogenesis. Replication stress arising from a variety of obstacles to replication fork progression and processivity is an important contributor to genome destabilization. Accordingly, cells mount a complex response to this stress that allows the stabilization and restart of stalled replication forks and enables the full duplication of the genetic material. This response articulates itself on three important platforms, Replication Protein A/RPA-coated single-stranded DNA, the DNA polymerase processivity clamp PCNA and the FANCD2/I Fanconi Anemia complex. On these platforms, the recruitment, activation and release of a variety of genome maintenance factors is regulated by post-translational modifications including mono- and poly-ubiquitylation. Here, we review recent insights into the control of replication fork stability and restart by the ubiquitin system during replication stress with a particular focus on human cells. We highlight the roles of E3 ubiquitin ligases, ubiquitin readers and deubiquitylases that provide the required flexibility at stalled forks to select the optimal restart pathways and rescue genome stability during stressful conditions.
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Affiliation(s)
- Maïlyn Yates
- Department of Biology, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada.
| | - Alexandre Maréchal
- Department of Biology, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada.
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16
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Guilbaud G, Murat P, Recolin B, Campbell BC, Maiter A, Sale JE, Balasubramanian S. Local epigenetic reprogramming induced by G-quadruplex ligands. Nat Chem 2017; 9:1110-1117. [PMID: 29064488 PMCID: PMC5669467 DOI: 10.1038/nchem.2828] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/14/2017] [Indexed: 12/28/2022]
Abstract
DNA and histone modifications regulate transcriptional activity and thus represent valuable targets to reprogram the activity of genes. Current epigenetic therapies target the machinery that regulates these modifications, leading to global transcriptional reprogramming with the potential for extensive undesired effects. Epigenetic information can also be modified as a consequence of disrupting processive DNA replication. Here, we demonstrate that impeding replication by small-molecule-mediated stabilization of G-quadruplex nucleic acid secondary structures triggers local epigenetic plasticity. We report the use of the BU-1 locus of chicken DT40 cells to screen for small molecules able to induce G-quadruplex-dependent transcriptional reprogramming. Further characterization of the top hit compound revealed its ability to induce a dose-dependent inactivation of BU-1 expression in two steps: the loss of H3K4me3 and then subsequent DNA cytosine methylation, changes that were heritable across cell divisions even after the compound was removed. Targeting DNA secondary structures thus represents a potentially new approach for locus-specific epigenetic reprogramming.
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Affiliation(s)
- Guillaume Guilbaud
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Pierre Murat
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
| | - Bénédicte Recolin
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Beth C. Campbell
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Ahmed Maiter
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Julian E. Sale
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Shankar Balasubramanian
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
- School of Clinical Medicine, University of Cambridge, Cambridge CB2 0SP, UK
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17
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18
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Sail V, Rizzo AA, Chatterjee N, Dash RC, Ozen Z, Walker GC, Korzhnev DM, Hadden MK. Identification of Small Molecule Translesion Synthesis Inhibitors That Target the Rev1-CT/RIR Protein-Protein Interaction. ACS Chem Biol 2017; 12:1903-1912. [PMID: 28541665 DOI: 10.1021/acschembio.6b01144] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Translesion synthesis (TLS) is an important mechanism through which proliferating cells tolerate DNA damage during replication. The mutagenic Rev1/Polζ-dependent branch of TLS helps cancer cells survive first-line genotoxic chemotherapy and introduces mutations that can contribute to the acquired resistance so often observed with standard anticancer regimens. As such, inhibition of Rev1/Polζ-dependent TLS has recently emerged as a strategy to enhance the efficacy of first-line chemotherapy and reduce the acquisition of chemoresistance by decreasing tumor mutation rate. The TLS DNA polymerase Rev1 serves as an integral scaffolding protein that mediates the assembly of the active multiprotein TLS complexes. Protein-protein interactions (PPIs) between the C-terminal domain of Rev1 (Rev1-CT) and the Rev1-interacting region (RIR) of other TLS DNA polymerases play an essential role in regulating TLS activity. To probe whether disrupting the Rev1-CT/RIR PPI is a valid approach for developing a new class of targeted anticancer agents, we designed a fluorescence polarization-based assay that was utilized in a pilot screen for small molecule inhibitors of this PPI. Two small molecule scaffolds that disrupt this interaction were identified, and secondary validation assays confirmed that compound 5 binds to Rev1-CT at the RIR interface. Finally, survival and mutagenesis assays in mouse embryonic fibroblasts and human fibrosarcoma HT1080 cells treated with cisplatin and ultraviolet light indicate that these compounds inhibit mutagenic Rev1/Polζ-dependent TLS in cells, validating the Rev1-CT/RIR PPI for future anticancer drug discovery and identifying the first small molecule inhibitors of TLS that target Rev1-CT.
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Affiliation(s)
- Vibhavari Sail
- Department
of Pharmaceutical Sciences, University of Connecticut, 69 North
Eagleville Road, Unit 3092, Storrs, Connecticut 06269, United States
| | - Alessandro A. Rizzo
- Department
of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, Connecticut 06030, United States
| | - Nimrat Chatterjee
- Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Radha C. Dash
- Department
of Pharmaceutical Sciences, University of Connecticut, 69 North
Eagleville Road, Unit 3092, Storrs, Connecticut 06269, United States
| | - Zuleyha Ozen
- Department
of Pharmaceutical Sciences, University of Connecticut, 69 North
Eagleville Road, Unit 3092, Storrs, Connecticut 06269, United States
| | - Graham C. Walker
- Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Dmitry M. Korzhnev
- Department
of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, Connecticut 06030, United States
| | - M. Kyle Hadden
- Department
of Pharmaceutical Sciences, University of Connecticut, 69 North
Eagleville Road, Unit 3092, Storrs, Connecticut 06269, United States
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19
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Methot S, Di Noia J. Molecular Mechanisms of Somatic Hypermutation and Class Switch Recombination. Adv Immunol 2017; 133:37-87. [DOI: 10.1016/bs.ai.2016.11.002] [Citation(s) in RCA: 165] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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20
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Gallina I, Christiansen SK, Pedersen RT, Lisby M, Oestergaard VH. TopBP1-mediated DNA processing during mitosis. Cell Cycle 2016; 15:176-83. [PMID: 26701150 DOI: 10.1080/15384101.2015.1128595] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Maintenance of genome integrity is crucial to avoid cancer and other genetic diseases. Thus faced with DNA damage, cells mount a DNA damage response to avoid genome instability. The DNA damage response is partially inhibited during mitosis presumably to avoid erroneous processing of the segregating chromosomes. Yet our recent study shows that TopBP1-mediated DNA processing during mitosis is highly important to reduce transmission of DNA damage to daughter cells. (1) Here we provide an overview of the DNA damage response and DNA repair during mitosis. One role of TopBP1 during mitosis is to stimulate unscheduled DNA synthesis at underreplicated regions. We speculated that such genomic regions are likely to hold stalled replication forks or post-replicative gaps, which become the substrate for DNA synthesis upon entry into mitosis. Thus, we addressed whether the translesion pathways for fork restart or post-replicative gap filling are required for unscheduled DNA synthesis in mitosis. Using genetics in the avian DT40 cell line, we provide evidence that unscheduled DNA synthesis in mitosis does not require the translesion synthesis scaffold factor Rev1 or PCNA ubiquitylation at K164, which serve to recruit translesion polymerases to stalled forks. In line with this finding, translesion polymerase η foci do not colocalize with TopBP1 or FANCD2 in mitosis. Taken together, we conclude that TopBP1 promotes unscheduled DNA synthesis in mitosis independently of the examined translesion polymerases.
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Affiliation(s)
- Irene Gallina
- a Department of Biology , University of Copenhagen , Copenhagen N , Denmark
| | | | | | - Michael Lisby
- a Department of Biology , University of Copenhagen , Copenhagen N , Denmark
| | - Vibe H Oestergaard
- a Department of Biology , University of Copenhagen , Copenhagen N , Denmark
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21
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Prasad R, Poltoratsky V, Hou EW, Wilson SH. Rev1 is a base excision repair enzyme with 5'-deoxyribose phosphate lyase activity. Nucleic Acids Res 2016; 44:10824-10833. [PMID: 27683219 PMCID: PMC5159550 DOI: 10.1093/nar/gkw869] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 09/16/2016] [Accepted: 09/21/2016] [Indexed: 12/28/2022] Open
Abstract
Rev1 is a member of the Y-family of DNA polymerases and is known for its deoxycytidyl transferase activity that incorporates dCMP into DNA and its ability to function as a scaffold factor for other Y-family polymerases in translesion bypass events. Rev1 also is involved in mutagenic processes during somatic hypermutation of immunoglobulin genes. In light of the mutation pattern consistent with dCMP insertion observed earlier in mouse fibroblast cells treated with a base excision repair-inducing agent, we questioned whether Rev1 could also be involved in base excision repair (BER). Here, we uncovered a weak 5′-deoxyribose phosphate (5′-dRP) lyase activity in mouse Rev1 and demonstrated the enzyme can mediate BER in vitro. The full-length Rev1 protein and its catalytic core domain are similar in their ability to support BER in vitro. The dRP lyase activity in both of these proteins was confirmed by NaBH4 reduction of the Schiff base intermediate and kinetics studies. Limited proteolysis, mass spectrometry and deletion analysis localized the dRP lyase active site to the C-terminal segment of Rev1's catalytic core domain. These results suggest that Rev1 could serve as a backup polymerase in BER and could potentially contribute to AID-initiated antibody diversification through this activity.
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Affiliation(s)
- Rajendra Prasad
- Genome Integrity and Structural Biology Laboratory, National Institutes of Health, NIEHS, 111 T.W. Alexander Drive, PO Box 12233, MD F3-01, Research Triangle Park, NC 27709, USA
| | - Vladimir Poltoratsky
- Genome Integrity and Structural Biology Laboratory, National Institutes of Health, NIEHS, 111 T.W. Alexander Drive, PO Box 12233, MD F3-01, Research Triangle Park, NC 27709, USA
| | - Esther W Hou
- Genome Integrity and Structural Biology Laboratory, National Institutes of Health, NIEHS, 111 T.W. Alexander Drive, PO Box 12233, MD F3-01, Research Triangle Park, NC 27709, USA
| | - Samuel H Wilson
- Genome Integrity and Structural Biology Laboratory, National Institutes of Health, NIEHS, 111 T.W. Alexander Drive, PO Box 12233, MD F3-01, Research Triangle Park, NC 27709, USA
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22
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Korzhnev DM, Hadden MK. Targeting the Translesion Synthesis Pathway for the Development of Anti-Cancer Chemotherapeutics. J Med Chem 2016; 59:9321-9336. [PMID: 27362876 DOI: 10.1021/acs.jmedchem.6b00596] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Human cells possess tightly controlled mechanisms to rescue DNA replication following DNA damage caused by environmental and endogenous carcinogens using a set of low-fidelity translesion synthesis (TLS) DNA polymerases. These polymerases can copy over replication blocking DNA lesions while temporarily leaving them unrepaired, preventing cell death at the expense of increasing mutation rates and contributing to the onset and progression of cancer. In addition, TLS has been implicated as a major cellular mechanism promoting acquired resistance to genotoxic chemotherapy. Owing to its central role in mutagenesis and cell survival after DNA damage, inhibition of the TLS pathway has emerged as a potential target for the development of anticancer agents. This review will recap our current understanding of the structure and regulation of DNA polymerase complexes that mediate TLS and describe how this knowledge is beginning to translate into the development of small molecule TLS inhibitors.
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Affiliation(s)
- Dmitry M Korzhnev
- Department of Molecular Biology and Biophysics, University of Connecticut Health Center , Farmington, Connecticut 06030, United States
| | - M Kyle Hadden
- Department of Pharmaceutical Sciences, University of Connecticut , 69 North Eagleville Road, Unit 3092, Storrs, Connecticut 06269, United States
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23
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Romanello M, Schiavone D, Frey A, Sale JE. Histone H3.3 promotes IgV gene diversification by enhancing formation of AID-accessible single-stranded DNA. EMBO J 2016; 35:1452-64. [PMID: 27220848 PMCID: PMC4883027 DOI: 10.15252/embj.201693958] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/25/2016] [Indexed: 11/30/2022] Open
Abstract
Immunoglobulin diversification is driven by activation‐induced deaminase (AID), which converts cytidine to uracil within the Ig variable (IgV) regions. Central to the recruitment of AID to the IgV genes are factors that regulate the generation of single‐stranded DNA (ssDNA), the enzymatic substrate of AID. Here, we report that chicken DT40 cells lacking variant histone H3.3 exhibit reduced IgV sequence diversification. We show that this results from impairment of the ability of AID to access the IgV genes due to reduced formation of ssDNA during IgV transcription. Loss of H3.3 also diminishes IgV R‐loop formation. However, reducing IgV R‐loops by RNase HI overexpression in wild‐type cells does not affect IgV diversification, showing that these structures are not necessary intermediates for AID access. Importantly, the reduction in the formation of AID‐accessible ssDNA in cells lacking H3.3 is independent of any effect on the level of transcription or the kinetics of RNAPII elongation, suggesting the presence of H3.3 in the nucleosomes of the IgV genes increases the chances of the IgV DNA becoming single‐stranded, thereby creating an effective AID substrate.
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Affiliation(s)
- Marina Romanello
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Davide Schiavone
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Alexander Frey
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Julian E Sale
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
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24
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Hirota K, Tsuda M, Mohiuddin, Tsurimoto T, Cohen IS, Livneh Z, Kobayashi K, Narita T, Nishihara K, Murai J, Iwai S, Guilbaud G, Sale JE, Takeda S. In vivo evidence for translesion synthesis by the replicative DNA polymerase δ. Nucleic Acids Res 2016; 44:7242-50. [PMID: 27185888 PMCID: PMC5009730 DOI: 10.1093/nar/gkw439] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 05/06/2016] [Indexed: 12/17/2022] Open
Abstract
The intolerance of DNA polymerase δ (Polδ) to incorrect base pairing contributes to its extremely high accuracy during replication, but is believed to inhibit translesion synthesis (TLS). However, chicken DT40 cells lacking the POLD3 subunit of Polδ are deficient in TLS. Previous genetic and biochemical analysis showed that POLD3 may promote lesion bypass by Polδ itself independently of the translesion polymerase Polζ of which POLD3 is also a subunit. To test this hypothesis, we have inactivated Polδ proofreading in pold3 cells. This significantly restored TLS in pold3 mutants, enhancing dA incorporation opposite abasic sites. Purified proofreading-deficient human Polδ holoenzyme performs TLS of abasic sites in vitro much more efficiently than the wild type enzyme, with over 90% of TLS events resulting in dA incorporation. Furthermore, proofreading deficiency enhances the capability of Polδ to continue DNA synthesis over UV lesions both in vivo and in vitro. These data support Polδ contributing to TLS in vivo and suggest that the mutagenesis resulting from loss of Polδ proofreading activity may in part be explained by enhanced lesion bypass.
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Affiliation(s)
- Kouji Hirota
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji- shi, Tokyo 192-0397, Japan
| | - Masataka Tsuda
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Mohiuddin
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Toshiki Tsurimoto
- Department of Biology, School of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Isadora S Cohen
- Weizmann Institute of Science, Department of Biological Chemistry, Rehovot 76100, Israel
| | - Zvi Livneh
- Weizmann Institute of Science, Department of Biological Chemistry, Rehovot 76100, Israel
| | - Kaori Kobayashi
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji- shi, Tokyo 192-0397, Japan
| | - Takeo Narita
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kana Nishihara
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Junko Murai
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shigenori Iwai
- Division of Chemistry, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Guillaume Guilbaud
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Julian E Sale
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Shunichi Takeda
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
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25
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Roy U, Schärer OD. Involvement of translesion synthesis DNA polymerases in DNA interstrand crosslink repair. DNA Repair (Amst) 2016; 44:33-41. [PMID: 27311543 DOI: 10.1016/j.dnarep.2016.05.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
DNA interstrand crosslinks (ICLs) covalently join the two strands of a DNA duplex and block essential processes such as DNA replication and transcription. Several important anti-tumor drugs such as cisplatin and nitrogen mustards exert their cytotoxicity by forming ICLs. However, multiple complex pathways repair ICLs and these are thought to contribute to the development of resistance towards ICL-inducing agents. While the understanding of many aspects of ICL repair is still rudimentary, studies in recent years have provided significant insights into the pathways of ICL repair. In this perspective we review the recent advances made in elucidating the mechanisms of ICL repair with a focus on the role of TLS polymerases. We describe the emerging models for how these enzymes contribute to and are regulated in ICL repair, discuss the key open questions and examine the implications for this pathway in anti-cancer therapy.
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Affiliation(s)
- Upasana Roy
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Orlando D Schärer
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA; Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY 11794-3400, USA.
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26
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Morganella S, Alexandrov LB, Glodzik D, Zou X, Davies H, Staaf J, Sieuwerts AM, Brinkman AB, Martin S, Ramakrishna M, Butler A, Kim HY, Borg Å, Sotiriou C, Futreal PA, Campbell PJ, Span PN, Van Laere S, Lakhani SR, Eyfjord JE, Thompson AM, Stunnenberg HG, van de Vijver MJ, Martens JWM, Børresen-Dale AL, Richardson AL, Kong G, Thomas G, Sale J, Rada C, Stratton MR, Birney E, Nik-Zainal S. The topography of mutational processes in breast cancer genomes. Nat Commun 2016; 7:11383. [PMID: 27136393 PMCID: PMC5001788 DOI: 10.1038/ncomms11383] [Citation(s) in RCA: 191] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/18/2016] [Indexed: 12/28/2022] Open
Abstract
Somatic mutations in human cancers show unevenness in genomic distribution that correlate with aspects of genome structure and function. These mutations are, however, generated by multiple mutational processes operating through the cellular lineage between the fertilized egg and the cancer cell, each composed of specific DNA damage and repair components and leaving its own characteristic mutational signature on the genome. Using somatic mutation catalogues from 560 breast cancer whole-genome sequences, here we show that each of 12 base substitution, 2 insertion/deletion (indel) and 6 rearrangement mutational signatures present in breast tissue, exhibit distinct relationships with genomic features relating to transcription, DNA replication and chromatin organization. This signature-based approach permits visualization of the genomic distribution of mutational processes associated with APOBEC enzymes, mismatch repair deficiency and homologous recombinational repair deficiency, as well as mutational processes of unknown aetiology. Furthermore, it highlights mechanistic insights including a putative replication-dependent mechanism of APOBEC-related mutagenesis.
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Affiliation(s)
- Sandro Morganella
- European Molecular Biology Laboratory, European Bioinformatics
Institute, Wellcome Trust Genome Campus, Cambridgeshire
CB10 1SD, UK
| | - Ludmil B. Alexandrov
- Wellcome Trust Sanger Institute, Cambridge
CB10 1SA, UK
- Theoretical Biology and Biophysics (T-6), Los Alamos National
Laboratory, Los Alamos
NM 87545, New Mexico, USA
- Center for Nonlinear Studies, Los Alamos National Laboratory,
Los Alamos
NM 87545, New Mexico, USA
| | | | - Xueqing Zou
- Wellcome Trust Sanger Institute, Cambridge
CB10 1SA, UK
| | - Helen Davies
- Wellcome Trust Sanger Institute, Cambridge
CB10 1SA, UK
| | - Johan Staaf
- Division of Oncology and Pathology, Department of Clinical Sciences
Lund, Lund University, Lund
SE-223 81, Sweden
| | - Anieta M. Sieuwerts
- Department of Medical Oncology, Erasmus MC Cancer Institute and
Cancer Genomics Netherlands, Erasmus University Medical Center,
Rotterdam
3015CN, The Netherlands
| | - Arie B. Brinkman
- Radboud University, Faculty of Science, Department of Molecular
Biology, 6525GA
Nijmegen, The Netherlands
| | - Sancha Martin
- Wellcome Trust Sanger Institute, Cambridge
CB10 1SA, UK
| | | | - Adam Butler
- Wellcome Trust Sanger Institute, Cambridge
CB10 1SA, UK
| | - Hyung-Yong Kim
- Department of Pathology, College of Medicine, Hanyang
University, Seoul
133-791, South Korea
| | - Åke Borg
- Division of Oncology and Pathology, Department of Clinical Sciences
Lund, Lund University, Lund
SE-223 81, Sweden
| | - Christos Sotiriou
- Breast Cancer Translational Research Laboratory, Université
Libre de Bruxelles, Institut Jules Bordet, Bd de Waterloo 121,
B-1000
Brussels, Belgium
| | - P. Andrew Futreal
- European Molecular Biology Laboratory, European Bioinformatics
Institute, Wellcome Trust Genome Campus, Cambridgeshire
CB10 1SD, UK
- Department of Genomic Medicine, UT MD Anderson Cancer
Center, Houston, Texas
77230, USA
| | | | - Paul N. Span
- Department of Radiation Oncology, and department of Laboratory
Medicine, Radboud university medical center, Nijmegen
6525GA, The Netherlands
| | - Steven Van Laere
- Translational Cancer Research Unit, GZA Hospitals Sint-Augustinus,
Wilrijk, Belgium and Center for Oncological Research, University of Antwerp,
Antwerp
B-2610, Belgium
| | - Sunil R. Lakhani
- Centre for Clinical Research and School of Medicine, University of
Queensland, Brisbane, Queensland
4059, Australia
- Pathology Queensland, The Royal Brisbane and Women's
Hospital, Brisbane, Queensland
4029, Australia
| | - Jorunn E. Eyfjord
- Cancer Research Laboratory, Faculty of Medicine, University of
Iceland, 101
Reykjavik, Iceland
| | - Alastair M. Thompson
- Department of Breast Surgical Oncology, University of Texas MD
Anderson Cancer Center, 1400 Pressler
Street,Houston, Texas
77030, USA
- Department of Surgical Oncology, University of Dundee,
Dundee
DD1 9SY, UK
| | - Hendrik G. Stunnenberg
- Radboud University, Faculty of Science, Department of Molecular
Biology, 6525GA
Nijmegen, The Netherlands
| | - Marc J. van de Vijver
- Department of Pathology, Academic Medical Center,
Meibergdreef 9, 1105 AZ
Amsterdam, The Netherlands
| | - John W. M. Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute and
Cancer Genomics Netherlands, Erasmus University Medical Center,
Rotterdam
3015CN, The Netherlands
| | - Anne-Lise Børresen-Dale
- Department of Cancer Genetics, Institute for Cancer Research, Oslo
University Hospital, The Norwegian Radium Hospital, Oslo
0310, Norway
- K.G. Jebsen Centre for Breast Cancer Research, Institute for
Clinical Medicine, University of Oslo, Oslo
0310, Norway
| | - Andrea L. Richardson
- Department of Pathology, Brigham and Women's Hospital,
Boston, Massachusetts
02115, USA
- Department of Cancer Biology, Dana-Farber Cancer Institute,
Boston, Massachusetts
02215, USA
| | - Gu Kong
- Department of Pathology, College of Medicine, Hanyang
University, Seoul
133-791, South Korea
| | - Gilles Thomas
- Synergie Lyon Cancer, Centre Léon Bérard,
28 rue Laënnec, Lyon
Cedex 08, France
| | - Julian Sale
- MRC Laboratory of Molecular Biology, Francis Crick Avenue,
Cambridge
CB2 0QH, UK
| | - Cristina Rada
- MRC Laboratory of Molecular Biology, Francis Crick Avenue,
Cambridge
CB2 0QH, UK
| | | | - Ewan Birney
- European Molecular Biology Laboratory, European Bioinformatics
Institute, Wellcome Trust Genome Campus, Cambridgeshire
CB10 1SD, UK
| | - Serena Nik-Zainal
- Wellcome Trust Sanger Institute, Cambridge
CB10 1SA, UK
- East Anglian Medical Genetics Service, Cambridge University
Hospitals NHS Foundation Trust, Cambridge
CB2 9NB, UK
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27
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Kobayashi S, Keka IS, Guilbaud G, Sale J, Narita T, Abdel-Aziz HI, Wang X, Ogawa S, Sasanuma H, Chiu R, Oestergaard VH, Lisby M, Takeda S. The role of HERC2 and RNF8 ubiquitin E3 ligases in the promotion of translesion DNA synthesis in the chicken DT40 cell line. DNA Repair (Amst) 2016; 40:67-76. [PMID: 26994443 DOI: 10.1016/j.dnarep.2016.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/12/2016] [Accepted: 02/03/2016] [Indexed: 12/20/2022]
Abstract
The replicative DNA polymerases are generally blocked by template DNA damage. The resulting replication arrest can be released by one of two post-replication repair (PRR) pathways, translesion DNA synthesis (TLS) and template switching by homologous recombination (HR). The HERC2 ubiquitin ligase plays a role in homologous recombination by facilitating the assembly of the Ubc13 ubiquitin-conjugating enzyme with the RNF8 ubiquitin ligase. To explore the role of HERC2 and RNF8 in PRR, we examined immunoglobulin diversification in chicken DT40 cells deficient in HERC2 and RNF8. Unexpectedly, the HERC2(-/-) and RNF8(-/-) cells and HERC2(-/-)/RNF8(-/-) double mutant cells exhibit a significant reduction in the rate of immunoglobulin (Ig) hypermutation, compared to wild-type cells. Further, the HERC2(-/-) and RNF8(-/-) mutants exhibit defective maintenance of replication fork progression immediately after exposure to UV while retaining proficient post-replicative gap filling. These mutants are both proficient in mono-ubiquitination of PCNA. Taken together, these results suggest that HERC2 and RNF8 promote TLS past abasic sites and UV-lesions at or very close to stalled replication forks.
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Affiliation(s)
- Shunsuke Kobayashi
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Islam Shamima Keka
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Guillaume Guilbaud
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Julian Sale
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Takeo Narita
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan; Department of Proteomics, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - H Ismail Abdel-Aziz
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan; Faculty of Medicine, Seuz Canal University, circular road Ez-Eldeen, Ismailia 41522, Egypt
| | - Xin Wang
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Saki Ogawa
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroyuki Sasanuma
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Roland Chiu
- University College Groningen, University of Groningen, 9718 BG Groningen, Hoendiepskade 23-24, The Netherlands
| | - Vibe H Oestergaard
- Department of Biology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Michael Lisby
- Department of Biology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Shunichi Takeda
- Department of Radiation Genetics, Kyoto University Graduate School of Medicine, Yoshida Konoe, Sakyo-ku, Kyoto 606-8501, Japan.
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28
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Hirota K, Yoshikiyo K, Guilbaud G, Tsurimoto T, Murai J, Tsuda M, Phillips LG, Narita T, Nishihara K, Kobayashi K, Yamada K, Nakamura J, Pommier Y, Lehmann A, Sale JE, Takeda S. The POLD3 subunit of DNA polymerase δ can promote translesion synthesis independently of DNA polymerase ζ. Nucleic Acids Res 2015; 43:1671-83. [PMID: 25628356 PMCID: PMC4330384 DOI: 10.1093/nar/gkv023] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The replicative DNA polymerase Polδ consists of a catalytic subunit POLD1/p125 and three regulatory subunits POLD2/p50, POLD3/p66 and POLD4/p12. The ortholog of POLD3 in Saccharomyces cerevisiae, Pol32, is required for a significant proportion of spontaneous and UV-induced mutagenesis through its additional role in translesion synthesis (TLS) as a subunit of DNA polymerase ζ. Remarkably, chicken DT40 B lymphocytes deficient in POLD3 are viable and able to replicate undamaged genomic DNA with normal kinetics. Like its counterpart in yeast, POLD3 is required for fully effective TLS, its loss resulting in hypersensitivity to a variety of DNA damaging agents, a diminished ability to maintain replication fork progression after UV irradiation and a significant decrease in abasic site-induced mutagenesis in the immunoglobulin loci. However, these defects appear to be largely independent of Polζ, suggesting that POLD3 makes a significant contribution to TLS independently of Polζ in DT40 cells. Indeed, combining polη, polζ and pold3 mutations results in synthetic lethality. Additionally, we show in vitro that POLD3 promotes extension beyond an abasic by the Polδ holoenzyme suggesting that while POLD3 is not required for normal replication, it may help Polδ to complete abasic site bypass independently of canonical TLS polymerases.
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Affiliation(s)
- Kouji Hirota
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan Department of Chemistry, GraduateSchool of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachioji- shi, Tokyo 192-0397, Japan
| | - Kazunori Yoshikiyo
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Guillaume Guilbaud
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Toshiki Tsurimoto
- Department of Biology, School of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Junko Murai
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Masataka Tsuda
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Lara G Phillips
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Takeo Narita
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kana Nishihara
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kaori Kobayashi
- Department of Chemistry, GraduateSchool of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachioji- shi, Tokyo 192-0397, Japan
| | - Kouich Yamada
- Division of Genetic Biochemistry, National Institute of Health and Nutrition, Tokyo 162-8636, Japan
| | - Jun Nakamura
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Yves Pommier
- Department of Biology, School of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Alan Lehmann
- Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK
| | - Julian E Sale
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Shunichi Takeda
- Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Yoshidakonoe, Sakyo-ku, Kyoto 606-8501, Japan
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29
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Jansen JG, Tsaalbi-Shtylik A, de Wind N. Roles of mutagenic translesion synthesis in mammalian genome stability, health and disease. DNA Repair (Amst) 2015; 29:56-64. [PMID: 25655219 DOI: 10.1016/j.dnarep.2015.01.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/22/2014] [Accepted: 01/07/2015] [Indexed: 01/08/2023]
Abstract
Most spontaneous and DNA damage-induced nucleotide substitutions in eukaryotes depend on translesion synthesis polymerases Rev1 and Pol ζ, the latter consisting of the catalytic subunit Rev3 and the accessory protein Rev7. Here we review the regulation, and the biochemical and cellular functions, of Rev1/Pol ζ-dependent translesion synthesis. These are correlated with phenotypes of mouse models with defects in Rev1, Rev3 or Rev7. The data indicate that Rev1/Pol ζ-mediated translesion synthesis is important for adaptive immunity while playing paradoxical roles in oncogenesis. On the other hand, by enabling the replication of endogenously damaged templates, Rev1/Pol ζ -dependent translesion synthesis protects stem cells, thereby preventing features of ageing. In conclusion, Rev1/Pol ζ-dependent translesion synthesis at DNA helix-distorting nucleotide lesions orchestrates pleiotropic responses that determine organismal fitness and disease.
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Affiliation(s)
- Jacob G Jansen
- Department of Human Genetics, Leiden University Medical Center, PO Box 9600, 2300RC Leiden, The Netherlands
| | - Anastasia Tsaalbi-Shtylik
- Department of Human Genetics, Leiden University Medical Center, PO Box 9600, 2300RC Leiden, The Netherlands
| | - Niels de Wind
- Department of Human Genetics, Leiden University Medical Center, PO Box 9600, 2300RC Leiden, The Netherlands.
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30
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Molnár J, Póti Á, Pipek O, Krzystanek M, Kanu N, Swanton C, Tusnády GE, Szallasi Z, Csabai I, Szüts D. The genome of the chicken DT40 bursal lymphoma cell line. G3 (BETHESDA, MD.) 2014; 4:2231-40. [PMID: 25227228 PMCID: PMC4232548 DOI: 10.1534/g3.114.013482] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 09/08/2014] [Indexed: 01/23/2023]
Abstract
The chicken DT40 cell line is a widely used model system in the study of multiple cellular processes due to the efficiency of homologous gene targeting. The cell line was derived from a bursal lymphoma induced by avian leukosis virus infection. In this study we characterized the genome of the cell line using whole genome shotgun sequencing and single nucleotide polymorphism array hybridization. The results indicate that wild-type DT40 has a relatively normal karyotype, except for whole chromosome copy number gains, and no karyotype variability within stocks. In a comparison to two domestic chicken genomes and the Gallus gallus reference genome, we found no unique mutational processes shaping the DT40 genome except for a mild increase in insertion and deletion events, particularly deletions at tandem repeats. We mapped coding sequence mutations that are unique to the DT40 genome; mutations inactivating the PIK3R1 and ATRX genes likely contributed to the oncogenic transformation. In addition to a known avian leukosis virus integration in the MYC gene, we detected further integration sites that are likely to de-regulate gene expression. The new findings support the hypothesis that DT40 is a typical transformed cell line with a relatively intact genome; therefore, it is well-suited to the role of a model system for DNA repair and related processes. The sequence data generated by this study, including a searchable de novo genome assembly and annotated lists of mutated genes, will support future research using this cell line.
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Affiliation(s)
- János Molnár
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary
| | - Ádám Póti
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary
| | - Orsolya Pipek
- Department of Physics of Complex Systems, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Marcin Krzystanek
- Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Nnennaya Kanu
- Cancer Research UK London Research Institute, London, WCA2 3PX, United Kingdom
| | - Charles Swanton
- Cancer Research UK London Research Institute, London, WCA2 3PX, United Kingdom
| | - Gábor E Tusnády
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary
| | - Zoltan Szallasi
- Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark Children's Hospital Informatics Program at the Harvard-Massachusetts Institutes of Technology Division of Health Sciences and Technology (CHIP@HST), Harvard Medical School, Boston, MA 02115
| | - István Csabai
- Department of Physics of Complex Systems, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Dávid Szüts
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary
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31
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Schiavone D, Guilbaud G, Murat P, Papadopoulou C, Sarkies P, Prioleau MN, Balasubramanian S, Sale JE. Determinants of G quadruplex-induced epigenetic instability in REV1-deficient cells. EMBO J 2014; 33:2507-20. [PMID: 25190518 PMCID: PMC4282387 DOI: 10.15252/embj.201488398] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
REV1-deficient chicken DT40 cells are compromised in replicating G quadruplex (G4)-forming DNA. This results in localised, stochastic loss of parental chromatin marks and changes in gene expression. We previously proposed that this epigenetic instability arises from G4-induced replication fork stalls disrupting the accurate propagation of chromatin structure through replication. Here, we test this model by showing that a single G4 motif is responsible for the epigenetic instability of the BU-1 locus in REV1-deficient cells, despite its location 3.5 kb from the transcription start site (TSS). The effect of the G4 is dependent on it residing on the leading strand template, but is independent of its in vitro thermal stability. Moving the motif to more than 4 kb from the TSS stabilises expression of the gene. However, loss of histone modifications (H3K4me3 and H3K9/14ac) around the transcription start site correlates with the position of the G4 motif, expression being lost only when the promoter is affected. This supports the idea that processive replication is required to maintain the histone modification pattern and full transcription of this model locus.
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Affiliation(s)
- Davide Schiavone
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | | | - Pierre Murat
- Department of Chemistry, University of Cambridge, Cambridge, UK
| | | | - Peter Sarkies
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK The Gurdon Institute, Cambridge, UK
| | | | | | - Julian E Sale
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
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32
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Hodskinson MRG, Silhan J, Crossan GP, Garaycoechea JI, Mukherjee S, Johnson CM, Schärer OD, Patel KJ. Mouse SLX4 is a tumor suppressor that stimulates the activity of the nuclease XPF-ERCC1 in DNA crosslink repair. Mol Cell 2014; 54:472-84. [PMID: 24726326 PMCID: PMC4017094 DOI: 10.1016/j.molcel.2014.03.014] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 01/21/2014] [Accepted: 02/28/2014] [Indexed: 11/18/2022]
Abstract
SLX4 binds to three nucleases (XPF-ERCC1, MUS81-EME1, and SLX1), and its deficiency leads to genomic instability, sensitivity to DNA crosslinking agents, and Fanconi anemia. However, it is not understood how SLX4 and its associated nucleases act in DNA crosslink repair. Here, we uncover consequences of mouse Slx4 deficiency and reveal its function in DNA crosslink repair. Slx4-deficient mice develop epithelial cancers and have a contracted hematopoietic stem cell pool. The N-terminal domain of SLX4 (mini-SLX4) that only binds to XPF-ERCC1 is sufficient to confer resistance to DNA crosslinking agents. Recombinant mini-SLX4 enhances XPF-ERCC1 nuclease activity up to 100-fold, directing specificity toward DNA forks. Mini-SLX4-XPF-ERCC1 also vigorously stimulates dual incisions around a DNA crosslink embedded in a synthetic replication fork, an essential step in the repair of this lesion. These observations define vertebrate SLX4 as a tumor suppressor, which activates XPF-ERCC1 nuclease specificity in DNA crosslink repair.
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Affiliation(s)
| | - Jan Silhan
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Gerry P Crossan
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Juan I Garaycoechea
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Shivam Mukherjee
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | | | - Orlando D Schärer
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA; Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY 11794-8651, USA
| | - Ketan J Patel
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK; Department of Medicine, Level 5, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK.
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33
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Listovsky T, Sale JE. Sequestration of CDH1 by MAD2L2 prevents premature APC/C activation prior to anaphase onset. ACTA ACUST UNITED AC 2013; 203:87-100. [PMID: 24100295 PMCID: PMC3798251 DOI: 10.1083/jcb.201302060] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
MAD2L2 is rapidly degraded by APC/CCDC20 at the onset of anaphase, allowing release of sequestered CDH1 to activate the dephosphorylated APC/C. The switch from activation of the anaphase-promoting complex/cyclosome (APC/C) by CDC20 to CDH1 during anaphase is crucial for accurate mitosis. APC/CCDC20 ubiquitinates a limited set of substrates for subsequent degradation, including Cyclin B1 and Securin, whereas APC/CCDH1 has a broader specificity. This switch depends on dephosphorylation of CDH1 and the APC/C, and on the degradation of CDC20. Here we show, in human cells, that the APC/C inhibitor MAD2L2 also contributes to ensuring the sequential activation of the APC/C by CDC20 and CDH1. In prometaphase, MAD2L2 sequestered free CDH1 away from the APC/C. At the onset of anaphase, MAD2L2 was rapidly degraded by APC/CCDC20, releasing CDH1 to activate the dephosphorylated APC/C. Loss of MAD2L2 led to premature association of CDH1 with the APC/C, early destruction of APC/CCDH1 substrates, and accelerated mitosis with frequent mitotic aberrations. Thus, MAD2L2 helps to ensure a robustly bistable switch between APC/CCDC20 and APC/CCDH1 during the metaphase-to-anaphase transition, thereby contributing to mitotic fidelity.
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Affiliation(s)
- Tamar Listovsky
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge CB2 0QH, England, UK
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34
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Erratum to: The role of activation-induced deaminase in antibody diversification and genomic instability. Immunol Res 2013. [DOI: 10.1007/s12026-013-8432-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Williams HL, Gottesman ME, Gautier J. The differences between ICL repair during and outside of S phase. Trends Biochem Sci 2013; 38:386-93. [PMID: 23830640 DOI: 10.1016/j.tibs.2013.05.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/14/2013] [Accepted: 05/29/2013] [Indexed: 12/11/2022]
Abstract
DNA interstrand crosslinks (ICLs) are complex lesions that block essential DNA transactions including DNA replication, recombination, and RNA transcription. Naturally occurring ICLs are rare, yet these lesions are the major cause of toxicity following treatment with several classes of crosslinking cancer chemotherapeutic drugs. ICLs are repaired during and outside of S phase by pathways with overlapping as well as distinct features. Here, we discuss some recent insights into the mechanisms of replication-dependent and replication-independent repair of ICLs with special emphasis on the differences between these repair pathways.
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Affiliation(s)
- Hannah L Williams
- Department of Genetics and Development, Institute for Cancer Genetics, Columbia University, New York, NY 10032, USA
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36
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Wang JH. The role of activation-induced deaminase in antibody diversification and genomic instability. Immunol Res 2013; 55:287-97. [PMID: 22956489 DOI: 10.1007/s12026-012-8369-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
More than a decade ago, activation-induced deaminase (AID) was identified as the initiator for somatic hypermutation (SHM) and class switch recombination (CSR). Since then, tremendous progress has been achieved toward elucidating how AID functions. AID targets the highly repetitive switch regions of the immunoglobulin heavy chain (IgH) locus to induce DNA double-strand breaks (DSBs), which can be rejoined, leading to switch of constant regions of antibody. When targeting to variable region exons of IgH and IgL loci, AID predominantly induces point mutations, termed SHM, resulting in increased affinity of antibody for antigen. While SHM and CSR enhance antibody diversity, AID-initiated DSBs and mutations may predispose B cells to carcinogenesis. This review focuses on the mechanisms that provide the specificity of AID targeting to Ig loci and the role of AID in genomic instability.
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Affiliation(s)
- Jing H Wang
- Integrated Department of Immunology, University of Colorado School of Medicine and National Jewish Health, Denver, CO 80206, USA.
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37
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Abstract
The structural features that enable replicative DNA polymerases to synthesize DNA rapidly and accurately also limit their ability to copy damaged DNA. Direct replication of DNA damage is termed translesion synthesis (TLS), a mechanism conserved from bacteria to mammals and executed by an array of specialized DNA polymerases. This chapter examines how these translesion polymerases replicate damaged DNA and how they are regulated to balance their ability to replicate DNA lesions with the risk of undesirable mutagenesis. It also discusses how TLS is co-opted to increase the diversity of the immunoglobulin gene hypermutation and the contribution it makes to the mutations that sculpt the genome of cancer cells.
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Affiliation(s)
- Julian E Sale
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom.
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38
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Sharma S, Canman CE. REV1 and DNA polymerase zeta in DNA interstrand crosslink repair. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2012; 53:725-40. [PMID: 23065650 PMCID: PMC5543726 DOI: 10.1002/em.21736] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 08/09/2012] [Accepted: 08/15/2012] [Indexed: 05/06/2023]
Abstract
DNA interstrand crosslinks (ICLs) are covalent linkages between two strands of DNA, and their presence interferes with essential metabolic processes such as transcription and replication. These lesions are extremely toxic, and their repair is essential for genome stability and cell survival. In this review, we will discuss how the removal of ICLs requires interplay between multiple genome maintenance pathways and can occur in the absence of replication (replication-independent ICL repair) or during S phase (replication-coupled ICL repair), the latter being the predominant pathway used in mammalian cells. It is now well recognized that translesion DNA synthesis (TLS), especially through the activities of REV1 and DNA polymerase zeta (Polζ), is necessary for both ICL repair pathways operating throughout the cell cycle. Recent studies suggest that the convergence of two replication forks upon an ICL initiates a cascade of events including unhooking of the lesion through the actions of structure-specific endonucleases, thereby creating a DNA double-stranded break (DSB). TLS across the unhooked lesion is necessary for restoring the sister chromatid before homologous recombination repair. Biochemical and genetic studies implicate REV1 and Polζ as being essential for performing lesion bypass across the unhooked crosslink, and this step appears to be important for subsequent events to repair the intermediate DSB. The potential role of Fanconi anemia pathway in the regulation of REV1 and Polζ-dependent TLS and the involvement of additional polymerases, including DNA polymerases kappa, nu, and theta, in the repair of ICLs is also discussed in this review.
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Affiliation(s)
- Shilpy Sharma
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI 48109-2200, USA
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39
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Sharma S, Helchowski CM, Canman CE. The roles of DNA polymerase ζ and the Y family DNA polymerases in promoting or preventing genome instability. Mutat Res 2012. [PMID: 23195997 DOI: 10.1016/j.mrfmmm.2012.11.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cancer cells display numerous abnormal characteristics which are initiated and maintained by elevated mutation rates and genome instability. Chromosomal DNA is continuously surveyed for the presence of damage or blocked replication forks by the DNA Damage Response (DDR) network. The DDR is complex and includes activation of cell cycle checkpoints, DNA repair, gene transcription, and induction of apoptosis. Duplicating a damaged genome is associated with elevated risks to fork collapse and genome instability. Therefore, the DNA damage tolerance (DDT) pathway is also employed to enhance survival and involves the recruitment of translesion DNA synthesis (TLS) polymerases to sites of replication fork blockade or single stranded DNA gaps left after the completion of replication in order to restore DNA to its double stranded form before mitosis. TLS polymerases are specialized for inserting nucleotides opposite DNA adducts, abasic sites, or DNA crosslinks. By definition, the DDT pathway is not involved in the actual repair of damaged DNA, but provides a mechanism to tolerate DNA lesions during replication thereby increasing survival and lessening the chance for genome instability. However this may be associated with increased mutagenesis. In this review, we will describe the specialized functions of Y family polymerases (Rev1, Polη, Polι and Polκ) and DNA polymerase ζ in lesion bypass, mutagenesis, and prevention of genome instability, the latter due to newly appreciated roles in DNA repair. The recently described role of the Fanconi anemia pathway in regulating Rev1 and Polζ-dependent TLS is also discussed in terms of their involvement in TLS, interstrand crosslink repair, and homologous recombination.
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Affiliation(s)
- Shilpy Sharma
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Corey M Helchowski
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Christine E Canman
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States.
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40
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Abstract
The maintenance of genome stability is critical for survival, and its failure is often associated with tumorigenesis. The Fanconi anemia (FA) pathway is essential for the repair of DNA interstrand cross-links (ICLs), and a germline defect in the pathway results in FA, a cancer predisposition syndrome driven by genome instability. Central to this pathway is the monoubiquitination of FANCD2, which coordinates multiple DNA repair activities required for the resolution of ICLs. Recent studies have demonstrated how the FA pathway coordinates three critical DNA repair processes, including nucleolytic incision, translesion DNA synthesis (TLS), and homologous recombination (HR). Here, we review recent advances in our understanding of the downstream ICL repair steps initiated by ubiquitin-mediated FA pathway activation.
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41
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Nishimura K, Ishiai M, Horikawa K, Fukagawa T, Takata M, Takisawa H, Kanemaki MT. Mcm8 and Mcm9 form a complex that functions in homologous recombination repair induced by DNA interstrand crosslinks. Mol Cell 2012; 47:511-22. [PMID: 22771115 DOI: 10.1016/j.molcel.2012.05.047] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 05/14/2012] [Accepted: 05/31/2012] [Indexed: 01/09/2023]
Abstract
DNA interstrand crosslinks (ICLs) are highly toxic lesions that stall the replication fork to initiate the repair process during the S phase of vertebrates. Proteins involved in Fanconi anemia (FA), nucleotide excision repair (NER), and translesion synthesis (TS) collaboratively lead to homologous recombination (HR) repair. However, it is not understood how ICL-induced HR repair is carried out and completed. Here, we showed that the replicative helicase-related Mcm family of proteins, Mcm8 and Mcm9, forms a complex required for HR repair induced by ICLs. Chicken DT40 cells lacking MCM8 or MCM9 are viable but highly sensitive to ICL-inducing agents, and exhibit more chromosome aberrations in the presence of mitomycin C compared with wild-type cells. During ICL repair, Mcm8 and Mcm9 form nuclear foci that partly colocalize with Rad51. Mcm8-9 works downstream of the FA and BRCA2/Rad51 pathways, and is required for HR that promotes sister chromatid exchanges, probably as a hexameric ATPase/helicase.
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Affiliation(s)
- Kohei Nishimura
- Center for Frontier Research, National Institute of Genetics, Research Organization of Information and Systems, Yata 1111, Mishima, Shizuoka 411-8540, Japan
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42
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Saribasak H, Gearhart PJ. Does DNA repair occur during somatic hypermutation? Semin Immunol 2012; 24:287-92. [PMID: 22728014 DOI: 10.1016/j.smim.2012.05.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 05/18/2012] [Indexed: 11/25/2022]
Abstract
Activation-induced deaminase (AID) initiates a flood of DNA damage in the immunoglobulin loci, leading to abasic sites, single-strand breaks and mismatches. It is compelling that some proteins in the canonical base excision and mismatch repair pathways have been hijacked to increase mutagenesis during somatic hypermutation. Thus, the AID-induced mutagenic pathways involve a mix of DNA repair proteins and low fidelity DNA polymerases to create antibody diversity. In this review, we analyze the roles of base excision repair, mismatch repair, and mutagenesis during somatic hypermutation of rearranged variable genes. The emerging view is that faithful base excision repair occurs simultaneously with mutagenesis, whereas faithful mismatch repair is mostly absent.
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Affiliation(s)
- Huseyin Saribasak
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States
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43
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Daly J, Bebenek K, Watt DL, Richter K, Jiang C, Zhao ML, Ray M, McGregor WG, Kunkel TA, Diaz M. Altered Ig hypermutation pattern and frequency in complementary mouse models of DNA polymerase ζ activity. THE JOURNAL OF IMMUNOLOGY 2012; 188:5528-37. [PMID: 22547703 DOI: 10.4049/jimmunol.1102629] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
To test the hypothesis that DNA polymerase ζ participates in Ig hypermutation, we generated two mouse models of Pol ζ function: a B cell-specific conditional knockout and a knock-in strain with a Pol ζ mutagenesis-enhancing mutation. Pol ζ-deficient B cells had a reduction in mutation frequency at Ig loci in the spleen and in Peyer's patches, whereas knock-in mice with a mutagenic Pol ζ displayed a marked increase in mutation frequency in Peyer's patches, revealing a pattern that was similar to mutations in yeast strains with a homologous mutation in the gene encoding the catalytic subunit of Pol ζ. Combined, these data are best explained by a direct role for DNA polymerase ζ in Ig hypermutation.
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Affiliation(s)
- Janssen Daly
- Somatic Hypermutation Group, Laboratory of Molecular Genetics, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
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44
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Temviriyanukul P, van Hees-Stuivenberg S, Delbos F, Jacobs H, de Wind N, Jansen JG. Temporally distinct translesion synthesis pathways for ultraviolet light-induced photoproducts in the mammalian genome. DNA Repair (Amst) 2012; 11:550-8. [PMID: 22521143 DOI: 10.1016/j.dnarep.2012.03.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 03/28/2012] [Accepted: 03/28/2012] [Indexed: 10/28/2022]
Abstract
Replicative polymerases (Pols) arrest at damaged DNA nucleotides, which induces ubiquitination of the DNA sliding clamp PCNA (PCNA-Ub) and DNA damage signaling. PCNA-Ub is associated with the recruitment or activation of translesion synthesis (TLS) DNA polymerases of the Y family that can bypass the lesions, thereby rescuing replication and preventing replication fork collapse and consequent formation of double-strand DNA breaks. Here, we have used gene-targeted mouse embryonic fibroblasts to perform a comprehensive study of the in vivo roles of PCNA-Ub and of the Y family TLS Pols η, ι, κ, Rev1 and the B family TLS Polζ in TLS and in the suppression of DNA damage signaling and genome instability after exposure to UV light. Our data indicate that TLS Pols ι and κ and the N-terminal BRCT domain of Rev1, that previously was implicated in the regulation of TLS, play minor roles in TLS of DNA photoproducts. PCNA-Ub is critical for an early TLS pathway that replicates both strongly helix-distorting (6-4) pyrimidine-pyrimidone ((6-4)PP) and mildly distorting cyclobutane pyrimidine dimer (CPD) photoproducts. The role of Polη is mainly restricted to early TLS of CPD photoproducts, whereas Rev1 and, in particular, Polζ are essential for the bypass of (6-4)PP photoproducts, both early and late after exposure. Thus, structurally distinct photoproducts at the mammalian genome are bypassed by different TLS Pols in temporally different, PCNA-Ub-dependent and independent fashions.
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Affiliation(s)
- Piya Temviriyanukul
- Department of Toxicogenetics, Leiden University Medical Center-LUMC, PO Box 9600, 2300 RC Leiden, The Netherlands.
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45
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Sharma S, Shah NA, Joiner AM, Roberts KH, Canman CE. DNA polymerase ζ is a major determinant of resistance to platinum-based chemotherapeutic agents. Mol Pharmacol 2012; 81:778-87. [PMID: 22387291 DOI: 10.1124/mol.111.076828] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Oxaliplatin, satraplatin, and picoplatin are cisplatin analogs that interact with DNA forming intrastrand and interstrand DNA cross-links (ICLs). Replicative bypass of cisplatin DNA adducts requires the cooperative actions of at least three translesion DNA synthesis (TLS) polymerases: Polη, REV1, and Polζ. Because oxaliplatin, satraplatin, and picoplatin contain bulkier chemical groups attached to the platinum core compared with cisplatin, we hypothesized that these chemical additions may impede replicative bypass by TLS polymerases and reduce tolerance to platinum-containing adducts. We examined multiple responses of cancer cells to oxaliplatin, satraplatin, or picoplatin treatment under conditions where expression of a TLS polymerase was limited. Our studies revealed that, although Polη contributes to the tolerance of cisplatin adducts, it plays a lesser role in promoting replication through oxaliplatin, satraplatin, and picoplatin adducts. REV1 and Polζ were necessary for tolerance to all four platinum analogs and prevention of hyperactivation of the DNA damage response after treatment. In addition, REV1 and Polζ were important for the resolution of DNA double-stranded breaks created during replication-associated repair of platinum-containing ICLs. Consistent with ICLs being the predominant cytotoxic lesion, depletion of REV1 or Polζ rendered two different model cell systems extremely sensitive to all four drugs, whereas Polη depletion had little effect. Together, our data suggest that REV1 and Polζ are critical for promoting resistance to all four clinically relevant platinum-based drugs by promoting both translesion DNA synthesis and DNA repair.
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Affiliation(s)
- Shilpy Sharma
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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46
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Sale JE. Measurement of diversification in the immunoglobulin light chain gene of DT40 cells. Methods Mol Biol 2012; 920:417-32. [PMID: 22941620 DOI: 10.1007/978-1-61779-998-3_29] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The immunoglobulin loci of the genetically tractable chicken B cell line DT40 provide a unique opportunity to study the cellular response to endogenously generated DNA damage in a chromosomal context. Abasic sites generated by the concerted action of Activation-Induced Deaminase (AID) and Uracil DNA Glycosylase result in both homologous recombination-dependent gene conversion and translesion synthesis-dependent point mutations. The system has provided important insights into both the early stages of AID-dependent immunoglobulin gene diversification and into the relationship between pathways of DNA damage bypass. Here we describe the assays that can be employed to monitor the rate and pattern of immunoglobulin gene diversification at the light chain locus of DT40.
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Affiliation(s)
- Julian E Sale
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.
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47
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Knobel PA, Marti TM. Translesion DNA synthesis in the context of cancer research. Cancer Cell Int 2011; 11:39. [PMID: 22047021 PMCID: PMC3224763 DOI: 10.1186/1475-2867-11-39] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 11/02/2011] [Indexed: 11/17/2022] Open
Abstract
During cell division, replication of the genomic DNA is performed by high-fidelity DNA polymerases but these error-free enzymes can not synthesize across damaged DNA. Specialized DNA polymerases, so called DNA translesion synthesis polymerases (TLS polymerases), can replicate damaged DNA thereby avoiding replication fork breakdown and subsequent chromosomal instability. We focus on the involvement of mammalian TLS polymerases in DNA damage tolerance mechanisms. In detail, we review the discovery of TLS polymerases and describe the molecular features of all the mammalian TLS polymerases identified so far. We give a short overview of the mechanisms that regulate the selectivity and activity of TLS polymerases. In addition, we summarize the current knowledge how different types of DNA damage, relevant either for the induction or treatment of cancer, are bypassed by TLS polymerases. Finally, we elucidate the relevance of TLS polymerases in the context of cancer therapy.
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Affiliation(s)
- Philip A Knobel
- Laboratory of Molecular Oncology, Clinic and Polyclinic of Oncology, University Hospital Zürich, Häldeliweg 4, CH-8044 Zürich, Switzerland.
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48
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Crossan GP, Patel KJ. The Fanconi anaemia pathway orchestrates incisions at sites of crosslinked DNA. J Pathol 2011; 226:326-37. [PMID: 21956823 DOI: 10.1002/path.3002] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 09/21/2011] [Accepted: 09/22/2011] [Indexed: 12/18/2022]
Abstract
Fanconi anaemia (FA) is a rare, autosomal recessive, genetically complex, DNA repair deficiency syndrome in man. Patients with FA exhibit a heterogeneous spectrum of clinical features. The most significant and consistent phenotypic characteristics are stem cell loss, causing progressive bone marrow failure and sterility, diverse developmental abnormalities and a profound predisposition to neoplasia. To date, 15 genes have been identified, biallelic disruption of any one of which results in this clinically defined syndrome. It is now apparent that all 15 gene products act in a common process to maintain genome stability. At the molecular level, a fundamental defect in DNA repair underlies this complex phenotype. Cells derived from FA patients spontaneously accumulate broken chromosomes and exhibit a marked sensitivity to DNA-damaging chemotherapeutic agents. Despite complementation analysis defining many components of the FA DNA repair pathway, no direct link to DNA metabolism was established until recently. First, it is now evident that the FA pathway is required to make incisions at the site of damaged DNA. Second, a specific component of the FA pathway has been identified that regulates nucleases previously implicated in DNA interstrand crosslink repair. Taken together, these data provide genetic and biochemical evidence that the FA pathway is a bona fide DNA repair pathway that directly mediates DNA repair transactions, thereby elucidating the specific molecular defect in human Fanconi anaemia.
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Affiliation(s)
- Gerry P Crossan
- MRC Laboratory of Molecular Biology, Division of Protein and Nucleic Acid Chemistry, Cambridge, UK.
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49
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Sarkies P, Murat P, Phillips LG, Patel KJ, Balasubramanian S, Sale JE. FANCJ coordinates two pathways that maintain epigenetic stability at G-quadruplex DNA. Nucleic Acids Res 2011; 40:1485-98. [PMID: 22021381 PMCID: PMC3287192 DOI: 10.1093/nar/gkr868] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
We have previously reported that DT40 cells deficient in the Y-family polymerase REV1 are defective in replicating G-quadruplex DNA. In vivo this leads to uncoupling of DNA synthesis from redeposition of histones displaced ahead of the replication fork, which in turn leads to loss of transcriptional repression due to failure to recycle pre-existing repressive histone post-translational modifications. Here we report that a similar process can also affect transcriptionally active genes, leading to their deactivation. We use this finding to develop an assay based on loss of expression of a cell surface marker to monitor epigenetic instability at the level of single cells. This assay allows us to demonstrate G4 DNA motif-associated epigenetic instability in mutants of three helicases previously implicated in the unwinding of G-quadruplex structures, FANCJ, WRN and BLM. Transcriptional profiling of DT40 mutants reveals that FANCJ coordinates two independent mechanisms to maintain epigenetic stability near G4 DNA motifs that are dependent on either REV1 or on the WRN and BLM helicases, suggesting a model in which efficient in vivo replication of G-quadruplexes often requires the established 5'-3'-helicase activity of FANCJ acting in concert with either a specialized polymerase or helicase operating in the opposite polarity.
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Affiliation(s)
- Peter Sarkies
- Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
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50
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Sharma S, Hicks JK, Chute CL, Brennan JR, Ahn JY, Glover TW, Canman CE. REV1 and polymerase ζ facilitate homologous recombination repair. Nucleic Acids Res 2011; 40:682-91. [PMID: 21926160 PMCID: PMC3258153 DOI: 10.1093/nar/gkr769] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
REV1 and DNA Polymerase ζ (REV3 and REV7) play important roles in translesion DNA synthesis (TLS) in which DNA replication bypasses blocking lesions. REV1 and Polζ have also been implicated in promoting repair of DNA double-stranded breaks (DSBs). However, the mechanism by which these two TLS polymerases increase tolerance to DSBs is poorly understood. Here we demonstrate that full-length human REV1, REV3 and REV7 interact in vivo (as determined by co-immunoprecipitation studies) and together, promote homologous recombination repair. Cells lacking REV3 were hypersensitive to agents that cause DSBs including the PARP inhibitor, olaparib. REV1, REV3 or REV7-depleted cells displayed increased chromosomal aberrations, residual DSBs and sites of HR repair following exposure to ionizing radiation. Notably, cells depleted of DNA polymerase η (Polη) or the E3 ubiquitin ligase RAD18 were proficient in DSB repair following exposure to IR indicating that Polη-dependent lesion bypass or RAD18-dependent monoubiquitination of PCNA are not necessary to promote REV1 and Polζ-dependent DNA repair. Thus, the REV1/Polζ complex maintains genomic stability by directly participating in DSB repair in addition to the canonical TLS pathway.
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Affiliation(s)
- Shilpy Sharma
- Department of Pharmacology, The University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
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