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Li T, Petreaca RC, Forsburg SL. Chromodomain mutation in S. pombe Kat5/Mst1 affects centromere dynamics and DNA repair. PLoS One 2024; 19:e0300732. [PMID: 38662722 PMCID: PMC11045136 DOI: 10.1371/journal.pone.0300732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 03/04/2024] [Indexed: 04/28/2024] Open
Abstract
KAT5 (S. pombe Mst1, human TIP60) is a MYST family histone acetyltransferase conserved from yeast to humans that is involved in multiple cellular activities. This family is characterized in part by containing a chromodomain, a motif associated with binding methylated histones. We show that a chromodomain mutation in the S. pombe Kat5, mst1-W66R, has defects in pericentromere silencing. mst1-W66R is sensitive to camptothecin (CPT) but only at an increased temperature of 36°C, although it is proficient for growth at this temperature. We also describe a de-silencing effect at the pericentromere by CPT that is independent of RNAi and methylation machinery. We also show that mst1-W66R disrupts recruitment of proteins to repair foci in response to camptothecin-induced DNA damage. Our data suggest a function of Mst1 chromodomain in centromere heterochromatin formation and a separate role in genome-wide damage repair in CPT.
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Affiliation(s)
- Tingting Li
- Program in Molecular & Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
| | - Ruben C. Petreaca
- Program in Molecular & Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
| | - Susan L. Forsburg
- Program in Molecular & Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
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2
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Xuan F, Xuan H, Huang M, He W, Xu H, Shi X, Wen H. The Tudor-knot Domain of KAT5 Regulates Nucleosomal Substrate Acetylation. J Mol Biol 2024; 436:168414. [PMID: 38141874 PMCID: PMC10957329 DOI: 10.1016/j.jmb.2023.168414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
The lysine acetyltransferase KAT5 is a pivotal enzyme responsible for catalyzing histone H4 acetylation in cells. In addition to its indispensable HAT domain, KAT5 also encompasses a conserved Tudor-knot domain at its N-terminus. However, the function of this domain remains elusive, with conflicting findings regarding its role as a histone reader. In our study, we have employed a CRISPR tiling array approach and unveiled the Tudor-knot motif as an essential domain for cell survival. The Tudor-knot domain does not bind to histone tails and is not required for KAT5's chromatin occupancy. However, its absence leads to a global reduction in histone acetylation, accompanied with genome-wide alterations in gene expression that consequently result in diminished cell viability. Mechanistically, we find that the Tudor-knot domain regulates KAT5's HAT activity on nucleosomes by fine-tuning substrate accessibility. In summary, our study uncovers the Tudor-knot motif as an essential domain for cell survival and reveals its critical role in modulating KAT5's catalytic efficiency on nucleosome and KAT5-dependent transcriptional programs critical for cell viability.
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Affiliation(s)
- Fan Xuan
- Department of Epigenetics, Van Andel Institute, Grand Rapids, MI, USA
| | - Hongwen Xuan
- Department of Epigenetics, Van Andel Institute, Grand Rapids, MI, USA
| | - Mengying Huang
- Department of Epigenetics, Van Andel Institute, Grand Rapids, MI, USA
| | - Wei He
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Han Xu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xiaobing Shi
- Department of Epigenetics, Van Andel Institute, Grand Rapids, MI, USA
| | - Hong Wen
- Department of Epigenetics, Van Andel Institute, Grand Rapids, MI, USA.
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3
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Dubey S, Jaiswal B, Gupta A. TIP60 acts as a regulator of genes involved in filopodia formation and cell migration during wound healing. J Biol Chem 2022; 298:102015. [PMID: 35525269 PMCID: PMC9249863 DOI: 10.1016/j.jbc.2022.102015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 04/21/2022] [Accepted: 04/24/2022] [Indexed: 12/12/2022] Open
Abstract
Wound healing is a complex phenomenon that requires coordination of numerous molecular and cellular changes to facilitate timely and efficient repair of the damaged tissue. Although many of these molecular pathways have been detailed, others remain to be elucidated. In the present work, we show for the first time, roles for the acetyltransferase TIP60 and nuclear receptor transcription factor PXR in this process, participating in wound healing by altering actin dynamics and cellular motility. We found that in response to wound-injury, TIP60 induces rapid formation of filopodia at the wounded cell front, leading to enhanced cell migration and faster closure of the wound. Further, qPCR analysis revealed heightened expression of Cdc42 and ROCK1 genes, key regulators involved in filopodia formation and actin reorganization, exclusively in TIP60-PXR-expressing cells upon wound-induction. We also performed ChIP assays to confirm the context-specific binding of TIP60 on the ROCK1 promoter and demonstrated that the TIP60 chromodomain is essential for loading of the TIP60–PXR complex onto the chromatin. Results from immunoprecipitation assays revealed that during the wounded condition, TIP60 alters the chromatin microenvironment by specifically acetylating histones H2B and H4, thereby modulating the expression of target genes. Overall, findings of this study show that TIP60 is a novel regulator of the wound healing process by regulating the expression of wound repair-related genes.
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Affiliation(s)
- Shraddha Dubey
- Epigenetics and Human Disease Laboratory, Department of Life Sciences, Shiv Nadar University, Uttar Pradesh, India
| | - Bharti Jaiswal
- Integrative Chemical Biology, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, India
| | - Ashish Gupta
- Epigenetics and Human Disease Laboratory, Department of Life Sciences, Shiv Nadar University, Uttar Pradesh, India.
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4
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Wang X, Lupton C, Lauth A, Wan TC, Foster P, Patterson M, Auchampach JA, Lough JW. Evidence that the acetyltransferase Tip60 induces the DNA damage response and cell-cycle arrest in neonatal cardiomyocytes. J Mol Cell Cardiol 2021; 155:88-98. [PMID: 33609538 PMCID: PMC8154663 DOI: 10.1016/j.yjmcc.2021.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 02/08/2021] [Accepted: 02/11/2021] [Indexed: 12/19/2022]
Abstract
Tip60, a pan-acetyltransferase encoded by the Kat5 gene, is enriched in the myocardium; however, its function in the heart is unknown. In cancer cells, Tip60 acetylates Atm (Ataxia-telangiectasia mutated), enabling its auto-phosphorylation (pAtm), which activates the DNA damage response (DDR). It was recently reported that activation of pAtm at the time of birth induces the DDR in cardiomyocytes (CMs), resulting in proliferative senescence. We therefore hypothesized that Tip60 initiates this process, and that depletion of Tip60 accordingly diminishes the DDR while extending the duration of CM cell-cycle activation. To test this hypothesis, an experimental model was used wherein a Myh6-driven Cre-recombinase transgene was activated on postnatal day 0 (P0) to recombine floxed Kat5 alleles and induce Tip60 depletion in neonatal CMs, without causing pathogenesis. Depletion of Tip60 resulted in reduced numbers of pAtm-positive CMs during the neonatal period, which correlated with reduced numbers of pH2A.X-positive CMs and decreased expression of genes encoding markers of the DDR as well as inflammation. This was accompanied by decreased expression of the cell-cycle inhibitors Meis1 and p27, activation of the cell-cycle in CMs, reduced CM size, and increased numbers of mononuclear/diploid CMs. Increased expression of fetal markers suggested that Tip60 depletion promotes a fetal-like proliferative state. Finally, infarction of Tip60-depleted hearts at P7 revealed improved cardiac function at P39 accompanied by reduced fibrosis, increased CM cell-cycle activation, and reduced apoptosis in the remote zone. These findings indicate that, among its pleiotropic functions, Tip60 induces the DDR in CMs, contributing to proliferative senescence.
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Affiliation(s)
- Xinrui Wang
- Department of Pharmacology and Toxicology and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Carri Lupton
- Department of Cell Biology, Neurobiology and Anatomy and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Amelia Lauth
- Department of Cell Biology, Neurobiology and Anatomy and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Tina C Wan
- Department of Pharmacology and Toxicology and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Parker Foster
- Department of Cell Biology, Neurobiology and Anatomy and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - Michaela Patterson
- Department of Cell Biology, Neurobiology and Anatomy and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America
| | - John A Auchampach
- Department of Pharmacology and Toxicology and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America.
| | - John W Lough
- Department of Cell Biology, Neurobiology and Anatomy and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States of America.
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5
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Li T, Petreaca RC, Forsburg SL. Schizosaccharomyces pombe KAT5 contributes to resection and repair of a DNA double-strand break. Genetics 2021; 218:6173406. [PMID: 33723569 DOI: 10.1093/genetics/iyab042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/04/2021] [Indexed: 11/14/2022] Open
Abstract
Chromatin remodeling is essential for effective repair of a DNA double-strand break (DSB). KAT5 (Schizosaccharomyces pombe Mst1, human TIP60) is a MYST family histone acetyltransferase conserved from yeast to humans that coordinates various DNA damage response activities at a DNA DSB, including histone remodeling and activation of the DNA damage checkpoint. In S. pombe, mutations in mst1+ causes sensitivity to DNA damaging drugs. Here we show that Mst1 is recruited to DSBs. Mutation of mst1+ disrupts recruitment of repair proteins and delays resection. These defects are partially rescued by deletion of pku70, which has been previously shown to antagonize repair by homologous recombination (HR). These phenotypes of mst1 are similar to pht1-4KR, a nonacetylatable form of histone variant H2A.Z, which has been proposed to affect resection. Our data suggest that Mst1 functions to direct repair of DSBs toward HR pathways by modulating resection at the DSB.
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Affiliation(s)
- Tingting Li
- Program of Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - Ruben C Petreaca
- Program of Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089-2910, USA
- Department of Molecular Genetics, Ohio State University, Marion, OH 43302, USA
| | - Susan L Forsburg
- Program of Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089-2910, USA
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6
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Numata A, Kwok HS, Zhou QL, Li J, Tirado-Magallanes R, Angarica VE, Hannah R, Park J, Wang CQ, Krishnan V, Rajagopalan D, Zhang Y, Zhou S, Welner RS, Osato M, Jha S, Bohlander SK, Göttgens B, Yang H, Benoukraf T, Lough JW, Bararia D, Tenen DG. Lysine acetyltransferase Tip60 is required for hematopoietic stem cell maintenance. Blood 2020; 136:1735-1747. [PMID: 32542325 PMCID: PMC7544546 DOI: 10.1182/blood.2019001279] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 05/12/2020] [Indexed: 12/13/2022] Open
Abstract
Hematopoietic stem cells (HSCs) have the potential to replenish the blood system for the lifetime of the organism. Their 2 defining properties, self-renewal and differentiation, are tightly regulated by the epigenetic machineries. Using conditional gene-knockout models, we demonstrated a critical requirement of lysine acetyltransferase 5 (Kat5, also known as Tip60) for murine HSC maintenance in both the embryonic and adult stages, which depends on its acetyltransferase activity. Genome-wide chromatin and transcriptome profiling in murine hematopoietic stem and progenitor cells revealed that Tip60 colocalizes with c-Myc and that Tip60 deletion suppress the expression of Myc target genes, which are associated with critical biological processes for HSC maintenance, cell cycling, and DNA repair. Notably, acetylated H2A.Z (acH2A.Z) was enriched at the Tip60-bound active chromatin, and Tip60 deletion induced a robust reduction in the acH2A.Z/H2A.Z ratio. These results uncover a critical epigenetic regulatory layer for HSC maintenance, at least in part through Tip60-dependent H2A.Z acetylation to activate Myc target genes.
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Affiliation(s)
- Akihiko Numata
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
- Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Hui Si Kwok
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Qi-Ling Zhou
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Jia Li
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | | | | | - Rebecca Hannah
- Department of Haematology, Wellcome and Medical Research Council Cambridge Stem Cell Institute, and
- Cambridge Institute for Medical Research, Cambridge University, Cambridge, United Kingdom
| | - Jihye Park
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA
| | - Chelsia Qiuxia Wang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Vaidehi Krishnan
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Deepa Rajagopalan
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Yanzhou Zhang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Siqin Zhou
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Robert S Welner
- Hematology Oncology, Department of Medicine, The University of Alabama at Birmingham Comprehensive Cancer Center, Birmingham, AL
| | - Motomi Osato
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Sudhakar Jha
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Stefan K Bohlander
- Leukaemia and Blood Cancer Research Unit, Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Berthold Göttgens
- Department of Haematology, Wellcome and Medical Research Council Cambridge Stem Cell Institute, and
- Cambridge Institute for Medical Research, Cambridge University, Cambridge, United Kingdom
| | - Henry Yang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Touati Benoukraf
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
- Discipline of Genetics, Faculty of Medicine, Memorial University of Newfoundland, St John's, NL, Canada
| | - John W Lough
- Department of Cell Biology, Neurobiology, and Anatomy, and the Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI; and
| | - Deepak Bararia
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
- Harvard Stem Cell Institute, Harvard Medical School, Boston, MA
| | - Daniel G Tenen
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
- Harvard Stem Cell Institute, Harvard Medical School, Boston, MA
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7
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Humbert J, Salian S, Makrythanasis P, Lemire G, Rousseau J, Ehresmann S, Garcia T, Alasiri R, Bottani A, Hanquinet S, Beaver E, Heeley J, Smith ACM, Berger SI, Antonarakis SE, Yang XJ, Côté J, Campeau PM. De Novo KAT5 Variants Cause a Syndrome with Recognizable Facial Dysmorphisms, Cerebellar Atrophy, Sleep Disturbance, and Epilepsy. Am J Hum Genet 2020; 107:564-574. [PMID: 32822602 PMCID: PMC7477011 DOI: 10.1016/j.ajhg.2020.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 07/21/2020] [Indexed: 12/11/2022] Open
Abstract
KAT5 encodes an essential lysine acetyltransferase, previously called TIP60, which is involved in regulating gene expression, DNA repair, chromatin remodeling, apoptosis, and cell proliferation; but it remains unclear whether variants in this gene cause a genetic disease. Here, we study three individuals with heterozygous de novo missense variants in KAT5 that affect normally invariant residues, with one at the chromodomain (p.Arg53His) and two at or near the acetyl-CoA binding site (p.Cys369Ser and p.Ser413Ala). All three individuals have cerebral malformations, seizures, global developmental delay or intellectual disability, and severe sleep disturbance. Progressive cerebellar atrophy was also noted. Histone acetylation assays with purified variant KAT5 demonstrated that the variants decrease or abolish the ability of the resulting NuA4/TIP60 multi-subunit complexes to acetylate the histone H4 tail in chromatin. Transcriptomic analysis in affected individual fibroblasts showed deregulation of multiple genes that control development. Moreover, there was also upregulated expression of PER1 (a key gene involved in circadian control) in agreement with sleep anomalies in all of the individuals. In conclusion, dominant missense KAT5 variants cause histone acetylation deficiency with transcriptional dysregulation of multiples genes, thereby leading to a neurodevelopmental syndrome with sleep disturbance, cerebellar atrophy, and facial dysmorphisms, and suggesting a recognizable syndrome.
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Affiliation(s)
- Jonathan Humbert
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center, Axe Oncologie du Centre de Recherche du Centre Hospitalier Universitaire de Quebec-Université Laval, Quebec City, QC G1R 3S3, Canada
| | - Smrithi Salian
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC H3T 1C5, Canada
| | - Periklis Makrythanasis
- Biomedical Research Foundation of the Academy of Athens, Athens 115 27, Greece; Department of Genetic Medicine and Development, University of Geneva Medical School and Geneva University Hospitals, 1211 Geneva, Switzerland
| | - Gabrielle Lemire
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC H3T 1C5, Canada
| | - Justine Rousseau
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC H3T 1C5, Canada
| | - Sophie Ehresmann
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC H3T 1C5, Canada
| | - Thomas Garcia
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC H3T 1C5, Canada
| | - Rami Alasiri
- Rosalind and Morris Goodman Cancer Research Centre, Department of Medicine, McGill University, Montreal, QC H3A 1A3, Canada
| | - Armand Bottani
- Service of Genetic Medicine, Geneva University Hospitals, 1211 Geneva, Switzerland
| | - Sylviane Hanquinet
- Unit of Pediatric Radiology, Geneva University Hospitals, 1211 Geneva, Switzerland
| | - Erin Beaver
- Mercy Kids Genetics, St. Louis, MO 63141, USA
| | | | - Ann C M Smith
- Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20894, USA
| | - Seth I Berger
- Children's National Health System, Washington, DC 20010, USA
| | - Stylianos E Antonarakis
- Department of Genetic Medicine and Development, University of Geneva Medical School and Geneva University Hospitals, 1211 Geneva, Switzerland
| | - Xiang-Jiao Yang
- Rosalind and Morris Goodman Cancer Research Centre, Department of Medicine, McGill University, Montreal, QC H3A 1A3, Canada
| | - Jacques Côté
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center, Axe Oncologie du Centre de Recherche du Centre Hospitalier Universitaire de Quebec-Université Laval, Quebec City, QC G1R 3S3, Canada
| | - Philippe M Campeau
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC H3T 1C5, Canada.
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Lai Y, He Z, Zhang A, Yan Z, Zhang X, Hu S, Wang N, He H. Tip60 and p300 function antagonistically in the epigenetic regulation of HPV18 E6/E7 genes in cervical cancer HeLa cells. Genes Genomics 2020; 42:691-698. [PMID: 32399935 DOI: 10.1007/s13258-020-00938-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 04/27/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND High-risk HPV is a causative factor of cervical cancer. HPV DNA fragments integrate into host genome resulting in the constitutive expression of HPV genes E6 and E7 under the regulation of transcription factors, such as p300 and Tip60. Interestingly, Tip60, a factor with HAT (histone acetyl transferase) activity, represses HPV18 E6/E7 genes while another HAT p300 activates the transcription of HPV18 E6/E7. OBJECTIVE To explore the mechanism for the opposite roles of Tip60 and p300 in the virus gene regulation, and the influence of Tip60 and p300 in histone modifications in the regulatory sequence of HPV18 genes. METHODS Tip60 or p300 was either knocked down or overexpressed in HeLa cells. The effects on HPV E6E7 expression were determined with RT-qPCR. The association of RNA polymerase II and the enrichment of acetylated or methylated histones in HPV promoter region were measured by ChIP assays with specific antibodies. RESULTS ChIP results showed that Tip60 and p300 differently affected the modifications of histone H3K9 and the deposition of nucleosomes in HPV18 long control region (LCR). HPV18 LCR in HeLa cells is bivalent chromatin carrying both the active histone H3K9 acetylation mark and the repressive histone H3K9 trimethylation mark, the balance is maintained by Tip60 and p300. CONCLUSION(S) Based on the roles of Tip60 and p300 in HPV gene regulation, chemical compounds targeting Tip60 or p300 are potential anti-cervical cancer drugs.
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Affiliation(s)
- Yongwei Lai
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
- Department of Pharmacology, Jilin Medical University, Jilin City, 132013, Jilin Province, People's Republic of China
| | - Zhao He
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
| | - Aowei Zhang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
| | - Zhinan Yan
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
| | - Xiao Zhang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
| | - Shiyue Hu
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
| | - Nan Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China
| | - Hongpeng He
- Key Laboratory of Industrial Microbiology, Ministry of Education and Tianjin City State Key Laboratory of Food Nutrition and Safety College of Biotechnology, Tianjin University of Science and Technology, No. 29, 13th. Avenue, Tianjin Economic and Technological Development Area (TEDA), Tianjin, 300457, People's Republic of China.
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9
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Perez de Souza L, Garbowicz K, Brotman Y, Tohge T, Fernie AR. The Acetate Pathway Supports Flavonoid and Lipid Biosynthesis in Arabidopsis. Plant Physiol 2020; 182:857-869. [PMID: 31719153 PMCID: PMC6997690 DOI: 10.1104/pp.19.00683] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/31/2019] [Indexed: 05/21/2023]
Abstract
The phenylpropanoid pathway of flavonoid biosynthesis has been the subject of considerable research attention. By contrast, the proposed polyketide pathway, also known as the acetate pathway, which provides malonyl-CoA moieties for the C2 elongation reaction catalyzed by chalcone synthase, is less well studied. Here, we identified four genes as candidates for involvement in the supply of cytosolic malonyl-CoA from the catabolism of acyl-CoA, based on coexpression analysis with other flavonoid-related genes. Two of these genes, ACC and KAT5, have been previously characterized with respect to their involvement in lipid metabolism, but no information concerning their relationship to flavonoid biosynthesis is available. To assess the occurrence and importance of the acetate pathway, we characterized the metabolomes of two mutant or transgenic Arabidopsis lines for each of the four enzymes of this putative pathway using a hierarchical approach covering primary and secondary metabolites as well as lipids. Intriguingly, not only flavonoid content but also glucosinolate content was altered in lines deficient in the acetate pathway, as were levels of lipids and most primary metabolites. We discuss these data in the context of our current understanding of flavonoids and lipid metabolism as well as with regard to improving human nutrition.
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Affiliation(s)
- Leonardo Perez de Souza
- Max-Planck-Institute of Molecular Plant Physiology, Am Müehlenberg 1, 14476 Potsdam-Golm, Germany
| | - Karolina Garbowicz
- Max-Planck-Institute of Molecular Plant Physiology, Am Müehlenberg 1, 14476 Potsdam-Golm, Germany
| | - Yariv Brotman
- Department of Life Sciences, Ben-Gurion University of the Negev, P.O.B. 653 Beersheba, Israel
| | - Takayuki Tohge
- Max-Planck-Institute of Molecular Plant Physiology, Am Müehlenberg 1, 14476 Potsdam-Golm, Germany
- Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Müehlenberg 1, 14476 Potsdam-Golm, Germany
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10
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Bose A, Sudevan S, Rao VJ, Shima H, Trivedi AK, Igarashi K, Kundu TK. Haploinsufficient tumor suppressor Tip60 negatively regulates oncogenic Aurora B kinase. J Biosci 2019; 44:147. [PMID: 31894128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The Aurora kinases represent a group of serine/threonine kinases which are crucial regulators of mitosis. Dysregulated Aurora kinase B (AurkB) expression, stemming from genomic amplification, increased gene transcription or overexpression of its allosteric activators, is capable of initiating and sustaining malignant phenotypes. Although AurkB level in cells is well-orchestrated, studies that relate to its stability or activity, independent of mitosis, are lacking. We report that AurkB undergoes acetylation in vitro by lysine acetyltransferases (KATs) belonging to different families, namely by p300 and Tip60. The haploinsufficient tumor suppressor Tip60 acetylates two highly conserved lysine residues within the kinase domain of AurkB which not only impinges the protein stability but also its kinase activity. These results signify a probable outcome on the increase in "overall activity" of AurkB upon Tip60 downregulation, as observed under cancerous conditions. The present work, therefore, uncovers an important functional interplay between AurkB and Tip60, frailty of which may be an initial event in carcinogenesis.
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Affiliation(s)
- Arnab Bose
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India
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Karnay A, Karisetty BC, Beaver M, Elefant F. Hippocampal stimulation promotes intracellular Tip60 dynamics with concomitant genome reorganization and synaptic gene activation. Mol Cell Neurosci 2019; 101:103412. [PMID: 31682915 DOI: 10.1016/j.mcn.2019.103412] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 09/07/2019] [Accepted: 09/17/2019] [Indexed: 11/17/2022] Open
Abstract
Genomic reorganizations mediating the engagement of target genes to transcription factories (TFs), characterized as specialized nuclear subcompartments enriched in hyperphosphorylated RNA polymerase II (RNAPII) and transcriptional regulators, act as an important layer of control in coordinating efficient gene transcription. However, their presence in hippocampal neurons and potential role in activity-dependent coregulation of genes within the brain remains unclear. Here, we investigate whether the well-characterized role for the histone acetyltransferase (HAT) Tip60 in mediating epigenetic control of inducible neuroplasticity genes involves TF associated chromatin reorganization in the hippocampus. We show that Tip60 shuttles into the nucleus following extracellular stimulation of rat hippocampal neurons with concomitant enhancement of Tip60 binding and activation of specific synaptic plasticity genes. Multicolor three-dimensional (3D) DNA fluorescent in situ hybridization (DNA-FISH) reveals that hippocampal stimulation mobilizes these same synaptic plasticity genes and Tip60 to RNAPII-rich TFs. Our data support a model by which external hippocampal stimulation promotes intracellular Tip60 HAT dynamics with concomitant TF associated genome reorganization to initiate Tip60mediated synaptic gene activation.
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Affiliation(s)
- Ashley Karnay
- Department of Biology, Drexel University, Philadelphia, PA, USA; Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, USA
| | | | - Mariah Beaver
- Department of Biology, Drexel University, Philadelphia, PA, USA
| | - Felice Elefant
- Department of Biology, Drexel University, Philadelphia, PA, USA.
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Petkau N, Budak H, Zhou X, Oster H, Eichele G. Acetylation of BMAL1 by TIP60 controls BRD4-P-TEFb recruitment to circadian promoters. eLife 2019; 8:e43235. [PMID: 31294688 PMCID: PMC6650244 DOI: 10.7554/elife.43235] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 07/10/2019] [Indexed: 12/22/2022] Open
Abstract
Many physiological processes exhibit circadian rhythms driven by cellular clocks composed of interlinked activating and repressing elements. To investigate temporal regulation in this molecular oscillator, we combined mouse genetic approaches and analyses of interactions of key circadian proteins with each other and with clock gene promoters. We show that transcriptional activators control BRD4-PTEFb recruitment to E-box-containing circadian promoters. During the activating phase of the circadian cycle, the lysine acetyltransferase TIP60 acetylates the transcriptional activator BMAL1 leading to recruitment of BRD4 and the pause release factor P-TEFb, followed by productive elongation of circadian transcripts. We propose that the control of BRD4-P-TEFb recruitment is a novel temporal checkpoint in the circadian clock cycle.
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Affiliation(s)
- Nikolai Petkau
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Harun Budak
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Xunlei Zhou
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Henrik Oster
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Gregor Eichele
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
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Wei X, Cai S, Boohaker RJ, Fried J, Li Y, Hu L, Pan Y, Cheng R, Zhang S, Tian Y, Gao M, Xu B. KAT5 promotes invasion and metastasis through C-MYC stabilization in ATC. Endocr Relat Cancer 2019; 26:141-151. [PMID: 30400007 DOI: 10.1530/erc-18-0193] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 09/19/2018] [Indexed: 12/13/2022]
Abstract
Anaplastic thyroid cancer (ATC) is an aggressive cancer with poor clinical prognosis. However, mechanisms driving ATC aggressiveness is not well known. Components of the DNA damage response (DDR) are frequently found mutated or aberrantly expressed in ATC. The goal of this study is to establish the functional link between histone acetyltransferase lysine (K) acetyltransferase 5 (KAT5, a critical DDR protein) and ATC invasiveness using clinical, in vitro and in vivo models. We analyzed the expression of KAT5 by immunohistochemistry and assessed its relationship with metastasis and overall survival in 82 ATC patients. Using cellular models, we established functional connection of KAT5 expression and C-MYC stabilization. We then studied the impact of genetically modified KAT5 expression on ATC metastasis in nude mice. In clinical samples, there is a strong correlation of KAT5 expression with ATC metastasis (P = 0.0009) and overall survival (P = 0.0017). At the cellular level, upregulation of KAT5 significantly promotes thyroid cancer cell proliferation and invasion. We also find that KAT5 enhances the C-MYC protein level by inhibiting ubiquitin-mediated degradation. Further evidence reveals that KAT5 acetylates and stabilizes C-MYC. Finally, we prove that altered KAT5 expression influences ATC lung metastases in vivo. KAT5 promotes ATC invasion and metastases through stabilization of C-MYC, demonstrating it as a new biomarker and therapeutic target for ATC.
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Affiliation(s)
- Xi Wei
- Department of Diagnostic and Therapeutic Ultrasonography, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Shang Cai
- Department of Oncology, Southern Research Institute and Cancer Cell Biology Program, the University of Alabama at Birmingham Comprehensive Cancer Center, Birmingham, Alabama, USA
- Department of Radiotherapy and Oncology, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Rebecca J Boohaker
- Department of Oncology, Southern Research Institute and Cancer Cell Biology Program, the University of Alabama at Birmingham Comprehensive Cancer Center, Birmingham, Alabama, USA
| | - Joshua Fried
- Department of Oncology, Southern Research Institute and Cancer Cell Biology Program, the University of Alabama at Birmingham Comprehensive Cancer Center, Birmingham, Alabama, USA
| | - Ying Li
- The Third Department of Breast Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Linfei Hu
- Department of Thyroid Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Yi Pan
- Department of Thyroid Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Ruifen Cheng
- Department of Thyroid Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Sheng Zhang
- Department of Diagnostic and Therapeutic Ultrasonography, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Ye Tian
- Department of Radiotherapy and Oncology, the Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Ming Gao
- Department of Thyroid Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Bo Xu
- Department of Oncology, Southern Research Institute and Cancer Cell Biology Program, the University of Alabama at Birmingham Comprehensive Cancer Center, Birmingham, Alabama, USA
- Department of Molecular Radiation Oncology, Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center of Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
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Li Z, Mbonye U, Feng Z, Wang X, Gao X, Karn J, Zhou Q. The KAT5-Acetyl-Histone4-Brd4 axis silences HIV-1 transcription and promotes viral latency. PLoS Pathog 2018; 14:e1007012. [PMID: 29684085 PMCID: PMC5933813 DOI: 10.1371/journal.ppat.1007012] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 05/03/2018] [Accepted: 04/09/2018] [Indexed: 11/23/2022] Open
Abstract
The bromodomain protein Brd4 promotes HIV-1 latency by competitively inhibiting P-TEFb-mediated transcription induced by the virus-encoded Tat protein. Brd4 is recruited to the HIV LTR by interactions with acetyl-histones3 (AcH3) and AcH4. However, the precise modification pattern that it reads and the writer for generating this pattern are unknown. By examining a pool of latently infected proviruses with diverse integration sites, we found that the LTR characteristically has low AcH3 but high AcH4 content. This unusual acetylation profile attracts Brd4 to suppress the interaction of Tat with the host super elongation complex (SEC) that is essential for productive HIV transcription and latency reversal. KAT5 (lysine acetyltransferase 5), but not its paralogs KAT7 and KAT8, is found to promote HIV latency through acetylating H4 on the provirus. Antagonizing KAT5 removes AcH4 and Brd4 from the LTR, enhances the SEC loading, and reverses as well as delays, the establishment of latency. The pro-latency effect of KAT5 is confirmed in a primary CD4+ T cell latency model as well as cells from ART-treated patients. Our data thus indicate the KAT5-AcH4-Brd4 axis as a key regulator of latency and a potential therapeutic target to reactivate latent HIV reservoirs for eradication. A major impediment to the cure of HIV/AIDS is the viral latency. Previous studies have identified the bromodomain protein Brd4 as a promoter of HIV latency by binding to the viral LTR to inhibit Tat-induced transcription. Here, we discover that the LTR of latent HIV has low acetylated histone H3 (AcH3) but high AcH4 content, which recruits Brd4 to inhibit Tat-transactivation. Furthermore, the lysine acetyltransferase KAT5 but not the paralogs KAT7 and KAT8 promotes latency through acetylating H4 on the provirus. Antagonizing KAT5 removes AcH4 and Brd4 from the LTR, enhances loading of the Super Elongation Complex, and interferes with the establishment of latency. Thus, the KAT5-AcH4-Brd4 axis is a key regulator of HIV latency and a potential therapeutic target for eradicating latent HIV reservoirs.
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Affiliation(s)
- Zichong Li
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, United States of America
| | - Uri Mbonye
- Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Zeming Feng
- School of Pharmaceutical Sciences, Xiamen University, Xiamen, Fujian, China
| | - Xiaohui Wang
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Xiang Gao
- School of Pharmaceutical Sciences, Xiamen University, Xiamen, Fujian, China
| | - Jonathan Karn
- Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Qiang Zhou
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, United States of America
- * E-mail:
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刘 江, 朱 君, 张 亚, 白 杨. [Expression pattern of FAM135B and K (lysine) acetyltransferase 5 in esophageal squamous cell carcinoma in Uygur patients]. Nan Fang Yi Ke Da Xue Xue Bao 2018; 38:224-228. [PMID: 29502064 PMCID: PMC6743880 DOI: 10.3969/j.issn.1673-4254.2018.02.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To explore the expression of the family with sequence similarity 135 member B (FAM135B) and K(lysine) acetyltransferase 5 (KAT5) in esophageal squamous cell carcinoma (ESCC) in Uygur patients. METHODS The expression of FAM135B and KAT5 in ESCC tissues and paired adjacent tissues from 40 Uygur patients were detected using Roche Benchmark XT. The correlation of FAM135B and KAT5 and their correlation with the clinicopathological characteristics of the patients were analyzed. RESULTS The positivity rates of FAM135B and KAT5 in ESCC tissues were 92.50% (37/40) and 15.00%(6/40) in these patients, respectively. The ESCC tissues showed a significantly higher rate of strong FAM135B expression than the adjacent tissues [45.00% (18/40) vs 22.50% (9/40); Χ2=4.528, P=0.033], but the rates of negative KAT5 expression was similar between ESCC and adjacent tissues [85.00% (34/40) vs 87.50% (35/40); Χ2=0.105, P=0.745]. Strong expressions of FAM135B in ESCC tissues and the paired adjacent tissues were well correlated (Kendall's coefficient = 0.707, P<0.001). In ESCC tissues, a strong expression of FAM135B showed a significant negative correlation with KAT5 expression (Kendall's coefficient=-0.946, P<0.001). Neither FAM135B nor KAT5 expression was associated with the patients' gender, age, tumor site, tumor differentiation, invasion, lymph node metastasis and clinical stage (all P>0.05). CONCLUSION A strong expression of FAM135B may be an important molecular basis for the occurrence of ESCC in Uygur patients and plays its role by negatively regulating the expression of KAT5.
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Affiliation(s)
- 江 刘
- 南方医科大学南方医院 消化内科,广东 广州 510515Department of Gastroenterology, Nanfang hospital, Southern Medical University, Guangzhou 510515, China
| | - 君玲 朱
- 新疆喀什地区第一人民医院病理科,新疆 喀什 844000Dpartment of Pathology, Kashi First People's Hospital, Kashi 84400, China
| | - 亚历 张
- 南方医科大学南方医院 消化内科,广东 广州 510515Department of Gastroenterology, Nanfang hospital, Southern Medical University, Guangzhou 510515, China
| | - 杨 白
- 南方医科大学南方医院 消化内科,广东 广州 510515Department of Gastroenterology, Nanfang hospital, Southern Medical University, Guangzhou 510515, China
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Su WP, Ho YC, Wu CK, Hsu SH, Shiu JL, Huang JC, Chang SB, Chiu WT, Hung JJ, Liu TL, Wu WS, Wu PY, Su WC, Chang JY, Liaw H. Chronic treatment with cisplatin induces chemoresistance through the TIP60-mediated Fanconi anemia and homologous recombination repair pathways. Sci Rep 2017; 7:3879. [PMID: 28634400 PMCID: PMC5478611 DOI: 10.1038/s41598-017-04223-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 05/10/2017] [Indexed: 11/18/2022] Open
Abstract
The Fanconi anemia pathway in coordination with homologous recombination is essential to repair interstrand crosslinks (ICLs) caused by cisplatin. TIP60 belongs to the MYST family of acetyltransferases and is involved in DNA repair and regulation of gene transcription. Although the physical interaction between the TIP60 and FANCD2 proteins has been identified that is critical for ICL repair, it is still elusive whether TIP60 regulates the expression of FA and HR genes. In this study, we found that the chemoresistant nasopharyngeal carcinoma cells, derived from chronic treatment of cisplatin, show elevated expression of TIP60. Furthermore, TIP60 binds to the promoters of FANCD2 and BRCA1 by using the chromatin immunoprecipitation experiments and promote the expression of FANCD2 and BRCA1. Importantly, the depletion of TIP60 significantly reduces sister chromatid exchange, a measurement of HR efficiency. The similar results were also shown in the FNACD2-, and BRCA1-deficient cells. Additionally, these TIP60-deficient cells encounter more frequent stalled forks, as well as more DNA double-strand breaks resulting from the collapse of stalled forks. Taken together, our results suggest that TIP60 promotes the expression of FA and HR genes that are important for ICL repair and the chemoresistant phenotype under chronic treatment with cisplatin.
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Affiliation(s)
- Wen-Pin Su
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No.35, Xiaodong Road, Tainan 704, Taiwan.
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan.
| | - Yen-Chih Ho
- Department of Life Sciences, National Cheng Kung University, No.1 University Road, Tainan, 701, Taiwan
| | - Cheng-Kuei Wu
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No.35, Xiaodong Road, Tainan 704, Taiwan
| | - Sen-Huei Hsu
- Department of Life Sciences, National Cheng Kung University, No.1 University Road, Tainan, 701, Taiwan
| | - Jia-Lin Shiu
- Department of Life Sciences, National Cheng Kung University, No.1 University Road, Tainan, 701, Taiwan
| | - Jheng-Cheng Huang
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No.35, Xiaodong Road, Tainan 704, Taiwan
| | - Song-Bin Chang
- Department of Life Sciences, National Cheng Kung University, No.1 University Road, Tainan, 701, Taiwan
| | - Wen-Tai Chiu
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Jan-Jong Hung
- Department of Biotechnology and Bioindustry Science, National Cheng-Kung University, Tainan, 701, Taiwan
| | - Tsung-Lin Liu
- Department of Biotechnology and Bioindustry Science, National Cheng-Kung University, Tainan, 701, Taiwan
| | - Wei-Sheng Wu
- Department of Electrical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Pei-Yu Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei, 11529, Taiwan
| | - Wu-Chou Su
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan
| | - Jang-Yang Chang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan
- National Institute of Cancer Research, National Health Research Institutes, Tainan, 704, Taiwan
| | - Hungjiun Liaw
- Department of Life Sciences, National Cheng Kung University, No.1 University Road, Tainan, 701, Taiwan.
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