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Kubota S, Sun Y, Morii M, Bai J, Ideue T, Hirayama M, Sorin S, Eerdunduleng, Yokomizo-Nakano T, Osato M, Hamashima A, Iimori M, Araki K, Umemoto T, Sashida G. Chromatin modifier Hmga2 promotes adult hematopoietic stem cell function and blood regeneration in stress conditions. EMBO J 2024; 43:2661-2684. [PMID: 38811851 PMCID: PMC11217491 DOI: 10.1038/s44318-024-00122-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/31/2024] Open
Abstract
The molecular mechanisms governing the response of hematopoietic stem cells (HSCs) to stress insults remain poorly defined. Here, we investigated effects of conditional knock-out or overexpression of Hmga2 (High mobility group AT-hook 2), a transcriptional activator of stem cell genes in fetal HSCs. While Hmga2 overexpression did not affect adult hematopoiesis under homeostasis, it accelerated HSC expansion in response to injection with 5-fluorouracil (5-FU) or in vitro treatment with TNF-α. In contrast, HSC and megakaryocyte progenitor cell numbers were decreased in Hmga2 KO animals. Transcription of inflammatory genes was repressed in Hmga2-overexpressing mice injected with 5-FU, and Hmga2 bound to distinct regions and chromatin accessibility was decreased in HSCs upon stress. Mechanistically, we found that casein kinase 2 (CK2) phosphorylates the Hmga2 acidic domain, promoting its access and binding to chromatin, transcription of anti-inflammatory target genes, and the expansion of HSCs under stress conditions. Notably, the identified stress-regulated Hmga2 gene signature is activated in hematopoietic stem progenitor cells of human myelodysplastic syndrome patients. In sum, these results reveal a TNF-α/CK2/phospho-Hmga2 axis controlling adult stress hematopoiesis.
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Affiliation(s)
- Sho Kubota
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
- Department of Medicinal Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Yuqi Sun
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
- Department of Hematology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Mariko Morii
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Jie Bai
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takako Ideue
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Mayumi Hirayama
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Supannika Sorin
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Eerdunduleng
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takako Yokomizo-Nakano
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Motomi Osato
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
- Department of General Internal Medicine, Kumamoto Kenhoku Hospital, Kumamoto, Japan
| | - Ai Hamashima
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Mihoko Iimori
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kimi Araki
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan
- Center for Metabolic Regulation of Healthy Aging, Kumamoto University, Kumamoto, Japan
| | - Terumasa Umemoto
- Laboratory of Hematopoietic Stem Cell Engineering, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Goro Sashida
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan.
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2
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Zhu Y, Zhao T, Wu Y, Xie S, Sun W, Wu J. ZNF862 induces cytostasis and apoptosis via the p21-RB1 and Bcl-xL-Caspase 3 signaling pathways in human gingival fibroblasts. J Periodontal Res 2024; 59:599-610. [PMID: 38482719 DOI: 10.1111/jre.13250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 12/06/2023] [Accepted: 02/15/2024] [Indexed: 05/24/2024]
Abstract
OBJECTIVE This study investigates the effects of ZNF862 on the proliferation and apoptosis of human gingival fibroblasts and their related mechanisms. BACKGROUND As a major transcription factor family, zinc finger proteins (ZFPs) regulate cell differentiation, growth, and apoptosis through their conserved zinc finger motifs, which allow high flexibility and specificity in gene regulation. In our previous study, ZNF862 mutation was associated with hereditary gingival fibromatosis. Nevertheless, little is known about the biological function of ZNF862. Therefore, this study was aimed to reveal intracellular localization of ZNF862, the influence of ZNF862 on the growth and apoptosis of human gingival fibroblasts (HGFs) and its potential related mechanisms. METHODS Immunohistochemistry, immunofluorescence staining, and western blotting were performed to determine the intracellular localization of ZNF862 in HGFs. HGFs were divided into three groups: ZNF862 overexpression group, ZNF862 interference group, and the empty vector control group. Then, the effects of ZNF862 on cell proliferation, migration, cell cycle, and apoptosis were evaluated. qRT-PCR and western blotting were performed to further explore the mechanism related to the proliferation and apoptosis of HGFs. RESULTS ZNF862 was found to be localized in the cytoplasm of HGFs. In vitro experiments revealed that ZNF862 overexpression inhibited HGFs proliferation and migration, induced cell cycle arrest at the G0/G1-phase and apoptosis. Whereas, ZNF862 knockdown promoted HGFs proliferation and migration, accelerated the transition from the G0/G1 phase into the S and G2/M phase and inhibited cell apoptosis. Mechanistically, the effects of ZNF862 on HGFs proliferation and apoptosis were noted to be dependent on inhibiting the cyclin-dependent kinase inhibitor 1A (p21)-retinoblastoma 1 (RB1) signaling pathway and enhancing the B-cell lymphoma-extra-large (Bcl-xL)-Caspase 3 signaling pathway. CONCLUSION Our results for the first time reveal that ZNF862 is localized in the cytoplasm of HGFs. ZNF862 can inhibit the proliferation of HGFs by inhibiting the p21-RB1 signaling pathway, and it also promotes the apoptosis of HGFs by enhancing the Bcl-xL-Caspase 3 signaling pathway.
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Affiliation(s)
- Yaoyao Zhu
- Department of Periodontology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
- Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Tian Zhao
- Department of Periodontology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Yongkang Wu
- Department of Periodontology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
- Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Sijing Xie
- Department of Cariology and Endodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Weibin Sun
- Department of Periodontology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
| | - Juan Wu
- Department of Periodontology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University, Nanjing, China
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Morii M, Kubota S, Iimori M, Yokomizo-Nakano T, Hamashima A, Bai J, Nishimura A, Tasaki M, Ando Y, Araki K, Sashida G. TIF1β activates leukemic transcriptional program in HSCs and promotes BCR::ABL1-induced myeloid leukemia. Leukemia 2024; 38:1275-1286. [PMID: 38734786 DOI: 10.1038/s41375-024-02276-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 04/26/2024] [Accepted: 05/01/2024] [Indexed: 05/13/2024]
Abstract
TIF1β/KAP1/TRIM28, a chromatin modulator, both represses and activates the transcription of genes in normal and malignant cells. Analyses of datasets on leukemia patients revealed that the expression level of TIF1β was increased in patients with chronic myeloid leukemia at the blast crisis and acute myeloid leukemia. We generated a BCR::ABL1 conditional knock-in (KI) mouse model, which developed aggressive myeloid leukemia, and demonstrated that the deletion of the Tif1β gene inhibited the progression of myeloid leukemia and showed longer survival than that in BCR::ABL1 KI mice, suggesting that Tif1β drove the progression of BCR::ABL1-induced leukemia. In addition, the deletion of Tif1β sensitized BCR::ABL1 KI leukemic cells to dasatinib. The deletion of Tif1β decreased the expression levels of TIF1β-target genes and chromatin accessibility peaks enriched with the Fosl1-binding motif in BCR::ABL1 KI stem cells. TIF1β directly bound to the promoters of proliferation genes, such as FOSL1, in human BCR::ABL1 cells, in which TIF1β and FOSL1 bound to adjacent regions of chromatin. Since the expression of Fosl1 was critical for the enhanced growth of BCR::ABL1 KI cells, Tif1β and Fosl1 interacted to activate the leukemic transcriptional program in and cellular function of BCR::ABL1 KI stem cells and drove the progression of myeloid leukemia.
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MESH Headings
- Animals
- Humans
- Mice
- Fusion Proteins, bcr-abl/genetics
- Fusion Proteins, bcr-abl/metabolism
- Gene Expression Regulation, Leukemic
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Transcription, Genetic
- Tripartite Motif-Containing Protein 28/metabolism
- Tripartite Motif-Containing Protein 28/genetics
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Affiliation(s)
- Mariko Morii
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Sho Kubota
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Mihoko Iimori
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takako Yokomizo-Nakano
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Ai Hamashima
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Jie Bai
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Akiho Nishimura
- Gastrointestinal Cancer Biology, International Research Center of Medical Sciences, Kumamoto University, Kumamoto, 860-0811, Japan
| | - Masayoshi Tasaki
- Department of Biomedical Laboratory Sciences, Graduate School of Health Sciences, Kumamoto University, Kumamoto, Japan
| | - Yukio Ando
- Department of Amyloidosis Research, Nagasaki International University, Sasebo, Japan
| | - Kimi Araki
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan
- Center for Metabolic Regulation of Healthy Aging, Kumamoto University, Kumamoto, Japan
| | - Goro Sashida
- Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan.
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4
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Chang YJ, Lin S, Kang ZF, Shen BJ, Tsai WH, Chen WC, Lu HP, Su YL, Chou SJ, Lin SY, Lin SW, Huang YJ, Wang HH, Chang CJ. Acetylation-Mimic Mutation of TRIM28-Lys304 to Gln Attenuates the Interaction with KRAB-Zinc-Finger Proteins and Affects Gene Expression in Leukemic K562 Cells. Int J Mol Sci 2023; 24:9830. [PMID: 37372979 DOI: 10.3390/ijms24129830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
TRIM28/KAP1/TIF1β is a crucial epigenetic modifier. Genetic ablation of trim28 is embryonic lethal, although RNAi-mediated knockdown in somatic cells yields viable cells. Reduction in TRIM28 abundance at the cellular or organismal level results in polyphenism. Posttranslational modifications such as phosphorylation and sumoylation have been shown to regulate TRIM28 activity. Moreover, several lysine residues of TRIM28 are subject to acetylation, but how acetylation of TRIM28 affects its functions remains poorly understood. Here, we report that, compared with wild-type TRIM28, the acetylation-mimic mutant TRIM28-K304Q has an altered interaction with Krüppel-associated box zinc-finger proteins (KRAB-ZNFs). The TRIM28-K304Q knock-in cells were created in K562 erythroleukemia cells by CRISPR-Cas9 (Clustered regularly interspaced short palindromic repeats/CRISPR-associated protein nuclease 9) gene editing method. Transcriptome analysis revealed that TRIM28-K304Q and TRIM28 knockout K562 cells had similar global gene expression profiles, yet the profiles differed considerably from wild-type K562 cells. The expression levels of embryonic-related globin gene and a platelet cell marker integrin-beta 3 were increased in TRIM28-K304Q mutant cells, indicating the induction of differentiation. In addition to the differentiation-related genes, many zinc-finger-proteins genes and imprinting genes were activated in TRIM28-K304Q cells; they were inhibited by wild-type TRIM28 via binding with KRAB-ZNFs. These results suggest that acetylation/deacetylation of K304 in TRIM28 constitutes a switch for regulating its interaction with KRAB-ZNFs and alters the gene regulation as demonstrated by the acetylation mimic TRIM28-K304Q.
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Affiliation(s)
- Yao-Jen Chang
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Steven Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Graduate Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Zhi-Fu Kang
- Graduate Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Bin-Jon Shen
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Wen-Hai Tsai
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Wen-Ching Chen
- Graduate Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Hsin-Pin Lu
- Graduate Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Lun Su
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Shu-Jen Chou
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Shu-Yu Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Sheng-Wei Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Yin-Jung Huang
- Department of Pediatrics, Division of Pediatric Immunology and Nephrology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Hsin-Hui Wang
- Department of Pediatrics, Division of Pediatric Immunology and Nephrology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
- Department of Pediatrics, Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Institute of Emergency and Critical Care Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
| | - Ching-Jin Chang
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Graduate Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 10617, Taiwan
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5
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Wang W, Yan T, Guo X, Cai H, Liang C, Huang L, Wang Y, Ma P, Qi S. KAP1 phosphorylation promotes the survival of neural stem cells after ischemia/reperfusion by maintaining the stability of PCNA. Stem Cell Res Ther 2022; 13:290. [PMID: 35799276 PMCID: PMC9264526 DOI: 10.1186/s13287-022-02962-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 04/17/2022] [Indexed: 11/28/2022] Open
Abstract
Aims To explore the function of phosphorylation of KAP1 (p-KAP1) at the serine-824 site (S824) in the proliferation and apoptosis of endogenous neural stem cells (NSCs) after cerebral ischemic/reperfusion (I/R). Methods The apoptosis and proliferation of C17.2 cells transfected with the p-KAP1-expression plasmids and the expression of proliferation cell nuclear antigen (PCNA) and p-KAP1 were detected by immunofluorescence and Western blotting after the Oxygen Glucose deprivation/reperfusion model (OGD/R). The interaction of p-KAP1 and CUL4A with PCNA was analyzed by immunoprecipitation. In the rats MCAO model, we performed the adeno-associated virus (AAV) 2/9 gene delivery of p-KAP1 mutants to verify the proliferation of endogenous NSCs and the colocalization of PCNA and CUL4A by immunofluorescence. Results The level of p-KAP1 was significantly down-regulated in the stroke model in vivo and in vitro. Simulated p-KAP1(S824) significantly increased the proliferation of C17.2 cells and the expression of PCNA after OGD/R. Simulated p-KAP1(S824) enhanced the binding of p-KAP1 and PCNA and decreased the interaction between PCNA and CUL4A in C17.2 cells subjected to OGD/R. The AAV2/9-mediated p-KAP1(S824) increased endogenous NSCs proliferation, PCNA expression, p-KAP1 binding to PCNA, and improved neurological function in the rat MCAO model. Conclusions Our findings confirmed that simulated p-KAP1(S824) improved the survival and proliferation of endogenous NSCs. The underlying mechanism is that highly expressed p-KAP1(S824) promotes binding to PCNA, and inhibits the binding of CUL4A to PCNA. This reduced CUL4A-mediated ubiquitination degradation to increase the stability of PCNA and promote the survival and proliferation of NSCs. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02962-5.
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Affiliation(s)
- Wan Wang
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Tianqing Yan
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Xinjian Guo
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Heng Cai
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Chang Liang
- School of Basic Medical Science, Xuzhou Medical University, Xuzhou, 221004, China
| | - Linyan Huang
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Yanling Wang
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Ping Ma
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China. .,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China.
| | - Suhua Qi
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China. .,Pharmacology College, Xuzhou Medical University, Xuzhou, 221004, China.
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6
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Disruption of RING and PHD Domains of TRIM28 Evokes Differentiation in Human iPSCs. Cells 2021; 10:cells10081933. [PMID: 34440702 PMCID: PMC8394524 DOI: 10.3390/cells10081933] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/18/2021] [Accepted: 07/26/2021] [Indexed: 12/31/2022] Open
Abstract
TRIM28, a multi-domain protein, is crucial in the development of mouse embryos and the maintenance of embryonic stem cells’ (ESC) self-renewal potential. As the epigenetic factor modulating chromatin structure, TRIM28 regulates the expression of numerous genes and is associated with progression and poor prognosis in many types of cancer. Because of many similarities between highly dedifferentiated cancer cells and normal pluripotent stem cells, we applied human induced pluripotent stem cells (hiPSC) as a model for stemness studies. For the first time in hiPSC, we analyzed the function of individual TRIM28 domains. Here we demonstrate the essential role of a really interesting new gene (RING) domain and plant homeodomain (PHD) in regulating pluripotency maintenance and self-renewal capacity of hiPSC. Our data indicate that mutation within the RING or PHD domain leads to the loss of stem cell phenotypes and downregulation of the FGF signaling. Moreover, impairment of RING or PHD domain results in decreased proliferation and impedes embryoid body formation. In opposition to previous data indicating the impact of phosphorylation on TRIM28 function, our data suggest that TRIM28 phosphorylation does not significantly affect the pluripotency and self-renewal maintenance of hiPSC. Of note, iPSC with disrupted RING and PHD functions display downregulation of genes associated with tumor metastasis, which are considered important targets in cancer treatment. Our data suggest the potential use of RING and PHD domains of TRIM28 as targets in cancer therapy.
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7
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Yamaguchi N. [Novel Tyrosine Phosphorylation Signals in the Nucleus and on Mitotic Spindle Fibers and Lysosomes Revealed by Strong Inhibition of Tyrosine Dephosphorylation]. YAKUGAKU ZASSHI 2021; 141:927-947. [PMID: 34193653 DOI: 10.1248/yakushi.21-00061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Protein-tyrosine phosphorylation is one of the posttranslational modifications and plays critical roles in regulating a wide variety of cellular processes, such as cell proliferation, differentiation, adhesion, migration, survival, and apoptosis. Protein-tyrosine phosphorylation is reversibly regulated by protein-tyrosine kinases and protein-tyrosine phosphatases. Strong inhibition of protein-tyrosine phosphatase activities is required to undoubtedly detect tyrosine phosphorylation. Our extremely careful usage of Na3VO4, a potent protein-tyrosine phosphatase inhibitor, has revealed not only the different intracellular trafficking pathways of Src-family tyrosine kinase members but also novel tyrosine phosphorylation signals in the nucleus and on mitotic spindle fibers and lysosomes. Furthermore, despite that the first identified oncogene product v-Src is generally believed to induce transformation through continuous stimulation of proliferation signaling by its strong tyrosine kinase activity, v-Src-driven transformation was found to be caused not by continuous proliferation signaling but by v-Src tyrosine kinase activity-dependent stochastic genome alterations. Here, I summarize our findings regarding novel tyrosine phosphorylation signaling in a spatiotemporal sense and highlight the significance of the roles of tyrosine phosphorylation in transcriptional regulation inside the nucleus and chromosome dynamics.
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Affiliation(s)
- Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
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Morii M, Kubota S, Hasegawa C, Takeda Y, Kometani S, Enomoto K, Suzuki T, Yanase S, Sato R, Akatsu A, Hirata K, Honda T, Kuga T, Tomonaga T, Nakayama Y, Yamaguchi N, Yamaguchi N. Src-mediated tyrosine phosphorylation of PRC1 and kinastrin/SKAP on the mitotic spindle. Sci Rep 2021; 11:2616. [PMID: 33510346 PMCID: PMC7844303 DOI: 10.1038/s41598-021-82189-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 01/13/2021] [Indexed: 11/10/2022] Open
Abstract
Src-family tyrosine kinases (SFKs) play important roles in a number of signal transduction events during mitosis, such as spindle formation. A relationship has been reported between SFKs and the mitotic spindle; however, the underlying mechanisms remain unclear. We herein demonstrated that SFKs accumulated in the centrosome region at the onset of mitosis. Centrosomal Fyn increased in the G2 phase in a microtubule polymerization-dependent manner. A mass spectrometry analysis using mitotic spindle preparations was performed to identify tyrosine-phosphorylated substrates. Protein regulator of cytokinesis 1 (PRC1) and kinastrin/small kinetochore-associated protein (kinastrin/SKAP) were identified as SFK substrates. SFKs mainly phosphorylated PRC1 at Tyr-464 and kinastrin at Tyr-87. Although wild-type PRC1 is associated with microtubules, phosphomimetic PRC1 impaired the ability to bind microtubules. Phosphomimetic kinastrin at Tyr-87 also impaired binding with microtubules. Collectively, these results suggest that tyrosine phosphorylation of PRC1 and kinastrin plays a role in their delocalization from microtubules during mitosis.
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Affiliation(s)
- Mariko Morii
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan.,Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, 860-0811, Japan
| | - Sho Kubota
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan.,Laboratory of Transcriptional Regulation in Leukemogenesis, International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, 860-0811, Japan
| | - Chizu Hasegawa
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Yumi Takeda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Shiori Kometani
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Kyoko Enomoto
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Takayuki Suzuki
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Sayuri Yanase
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Rika Sato
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Aki Akatsu
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Kensuke Hirata
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Takuya Honda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Takahisa Kuga
- Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka, 567-0085, Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka, 567-0085, Japan
| | - Yuji Nakayama
- Department of Biochemistry and Molecular Biology, Kyoto Pharmaceutical University, Kyoto, 607-8414, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, 260-8675, Japan.
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9
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Suzuki K, Honda T, Akatsu A, Yamaguchi N, Yamaguchi N. The promoting role of lysosome-localized c-Src in autophagosome-lysosome fusion. Cell Signal 2020; 75:109774. [PMID: 32916275 DOI: 10.1016/j.cellsig.2020.109774] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 09/03/2020] [Accepted: 09/03/2020] [Indexed: 02/06/2023]
Abstract
Src-family kinases (SFKs), such as c-Src, Lyn and Fyn, belong to non-receptor-type tyrosine kinases and play key roles in cell proliferation, adhesion, and migration. SFKs are anchored to the plasma membrane, Golgi membranes and lysosomal membranes through lipid modifications. Although the functions of SFKs being localized to the plasma membrane are intensively studied, those of SFKs being localized to organelle membranes are poorly understood. Here, we show that, among SFKs, c-Src in particular is involved in a decrease in the amount of LC3-II. c-Src and non-palmitoylated Lyn [Lyn(C3S) (cysteine-3 → serine-3)], which are localized onto lysosomes, decrease the amount of LC3-II and treatment with SFK inhibitors increases the amount of LC3-II, suggesting the importance of SFKs' lysosomal localization for a change of autophagic flux in a kinase activity-dependent manner. Colocalization of LC3-II with the lysosome-associated membrane protein LAMP1 shows that lysosome-localized SFKs promote the fusion of autophagosomes with lysosomes. Lysosome-localized SFKs play a positive role in the maintenance of cell viability under starvation conditions, which is further supported by knockdown of c-Src. Therefore, our results suggest that autophagosome-lysosome fusion is promoted by lysosome-localized c-Src, leading to cell survival under starvation conditions.
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Affiliation(s)
- Ko Suzuki
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Takuya Honda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Aki Akatsu
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan.
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10
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Nakajo H, Ishibashi K, Aoyama K, Kubota S, Hasegawa H, Yamaguchi N, Yamaguchi N. Role for tyrosine phosphorylation of SUV39H1 histone methyltransferase in enhanced trimethylation of histone H3K9 via neuregulin-1/ErbB4 nuclear signaling. Biochem Biophys Res Commun 2019; 511:765-771. [PMID: 30833073 DOI: 10.1016/j.bbrc.2019.02.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 02/24/2019] [Indexed: 02/08/2023]
Abstract
Protein-tyrosine kinases transmit signals by phosphorylating their substrates in diverse cellular events. The receptor-type tyrosine kinase ErbB4, a member of the epidermal growth factor receptor subfamily, is activated and proteolytically cleaved upon ligand stimulation, and the cleaved ErbB4 intracellular domain (4ICD) is released into the cytoplasm and the nucleus. We previously showed that generation of nuclear 4ICD by neuregulin-1 (NRG-1) stimulation enhances the levels of trimethylation of histone H3 at lysine 9 (H3K9me3). However, it remains unclear how nuclear 4ICD enhances H3K9me3 levels. Here we show that the histone H3K9 methyltransferase SUV39H1 associates with NRG-1/ErbB4-mediated H3K9me3. Knockdown of SUV39H1 blocked NRG-1-mediated enhancement of the levels of H3K9me3. Nuclear 4ICD was found to phosphorylate SUV39H1 primarily at Tyr-297, -303, and -308 that are conserved among humans, mice, and flies. Furthermore, knockdown-rescue experiments showed that the unphosphorylatable SUV39H1 mutant (3 YF) was incapable of enhancing the levels of H3K9me3 upon NRG-1 stimulation. These results suggest that nuclear ErbB4 enhances H3K9me3 levels through tyrosine phosphorylation of SUV39H1 in NRG-1/ErbB4 signal-mediated chromatin remodeling.
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Affiliation(s)
- Haruna Nakajo
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Kenichi Ishibashi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Kazumasa Aoyama
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Sho Kubota
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Hitomi Hasegawa
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan.
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11
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Hirata K, Takakura Y, Shibazaki M, Morii M, Honda T, Oshima M, Aoyama K, Iwama A, Nakayama Y, Takano H, Yamaguchi N, Yamaguchi N. Forkhead box protein A1 confers resistance to transforming growth factor-β-induced apoptosis in breast cancer cells through inhibition of Smad3 nuclear translocation. J Cell Biochem 2019; 120:2259-2270. [PMID: 30206966 DOI: 10.1002/jcb.27551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 08/02/2018] [Indexed: 01/24/2023]
Abstract
Transforming growth factor-β (TGF-β) induces apoptosis of normal epithelial cells, such as mammary epithelium. Although breast cancer progression associates with acquisition of resistance to TGF-β-induced apoptosis, the molecular mechanisms underlying this resistance are largely unknown. Here, we show that forkhead box protein A1 (FOXA1), which is known as a pioneer transcription factor, suppresses TGF-β-induced apoptosis of estrogen receptor-positive breast cancer cells. FOXA1 is found to inhibit nuclear translocation of Smad3, a key transcription factor downstream of TGF-β signaling, through suppression of the binding of Smad3 to the nuclear import receptor importin7. Furthermore, RNA sequencing analyses show that knockdown of FOXA1 upregulates Smad3-mediated proapoptotic gene expression. These results demonstrate that FOXA1 as a potent survival factor that suppresses TGF-β-induced apoptosis by inhibiting Smad3 signaling in estrogen receptor-positive breast cancer cells. Thus, we provide evidence for the first time that FOXA1 localizing to the cytoplasm negatively regulates Smad3-induced apoptosis in TGF-β-mediated signal transduction.
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Affiliation(s)
- Kensuke Hirata
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Yuki Takakura
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Misato Shibazaki
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Mariko Morii
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Takuya Honda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Motohiko Oshima
- Department of Cellular and Molecular Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Kazumasa Aoyama
- Department of Cellular and Molecular Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Atsushi Iwama
- Department of Cellular and Molecular Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yuji Nakayama
- Department of Biochemistry and Molecular Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hiroyuki Takano
- Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan.,Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
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12
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Schoenherr C, Frame MC, Byron A. Trafficking of Adhesion and Growth Factor Receptors and Their Effector Kinases. Annu Rev Cell Dev Biol 2018; 34:29-58. [PMID: 30110558 DOI: 10.1146/annurev-cellbio-100617-062559] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cell adhesion to macromolecules in the microenvironment is essential for the development and maintenance of tissues, and its dysregulation can lead to a range of disease states, including inflammation, fibrosis, and cancer. The biomechanical and biochemical mechanisms that mediate cell adhesion rely on signaling by a range of effector proteins, including kinases and associated scaffolding proteins. The intracellular trafficking of these must be tightly controlled in space and time to enable effective cell adhesion and microenvironmental sensing and to integrate cell adhesion with, and compartmentalize it from, other cellular processes, such as gene transcription, protein degradation, and cell division. Delivery of adhesion receptors and signaling proteins from the plasma membrane to unanticipated subcellular locales is revealing novel biological functions. Here, we review the expected and unexpected trafficking, and sites of activity, of adhesion and growth factor receptors and intracellular kinase partners as we begin to appreciate the complexity and diversity of their spatial regulation.
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Affiliation(s)
- Christina Schoenherr
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XR, United Kingdom;
| | - Margaret C Frame
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XR, United Kingdom;
| | - Adam Byron
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XR, United Kingdom;
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13
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Krischuns T, Günl F, Henschel L, Binder M, Willemsen J, Schloer S, Rescher U, Gerlt V, Zimmer G, Nordhoff C, Ludwig S, Brunotte L. Phosphorylation of TRIM28 Enhances the Expression of IFN-β and Proinflammatory Cytokines During HPAIV Infection of Human Lung Epithelial Cells. Front Immunol 2018; 9:2229. [PMID: 30323812 PMCID: PMC6172303 DOI: 10.3389/fimmu.2018.02229] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 09/07/2018] [Indexed: 01/28/2023] Open
Abstract
Human infection with highly pathogenic avian influenza viruses (HPAIV) is often associated with severe tissue damage due to hyperinduction of interferons and proinflammatory cytokines. The reasons for this excessive cytokine expression are still incompletely understood, which has hampered the development of efficient immunomodulatory treatment options. The host protein TRIM28 associates to the promoter regions of over 13,000 genes and is recognized as a genomic corepressor and negative immune regulator. TRIM28 corepressor activity is regulated by post-translational modifications, specifically phosphorylation of S473, which modulates binding of TRIM28 to the heterochromatin-binding protein HP1. Here, we identified TRIM28 as a key immune regulator leading to increased IFN-β and proinflammatory cytokine levels during infection with HPAIV. Using influenza A virus strains of the subtype H1N1 as well as HPAIV of subtypes H7N7, H7N9, and H5N1, we could demonstrate that strain-specific phosphorylation of TRIM28 S473 is induced by a signaling cascade constituted of PKR, p38 MAPK, and MSK1 in response to RIG-I independent sensing of viral RNA. Furthermore, using chemical inhibitors as well as knockout cell lines, our results suggest that phosphorylation of S473 facilitates a functional switch leading to increased levels of IFN-β, IL-6, and IL-8. In summary, we have identified TRIM28 as a critical factor controlling excessive expression of type I IFNs as well as proinflammatory cytokines during infection with H5N1, H7N7, and H7N9 HPAIV. In addition, our data indicate a novel mechanism of PKR-mediated IFN-β expression, which could lay the ground for novel treatment options aiming at rebalancing dysregulated immune responses during severe HPAIV infection.
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Affiliation(s)
- Tim Krischuns
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Franziska Günl
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Lea Henschel
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Marco Binder
- Research Group “Dynamics of Early Viral Infection and the Innate Antiviral Response”, Division Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Joschka Willemsen
- Research Group “Dynamics of Early Viral Infection and the Innate Antiviral Response”, Division Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Sebastian Schloer
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Center for Molecular Biology of Inflammation, Institute of Medical Biochemistry, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Ursula Rescher
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Center for Molecular Biology of Inflammation, Institute of Medical Biochemistry, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Vanessa Gerlt
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Gert Zimmer
- Institute of Virology and Immunology (IVI), Bern, Switzerland
- Department of Infectious Diseases and Pathobiology (DIP), Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Carolin Nordhoff
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Stephan Ludwig
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
| | - Linda Brunotte
- Institute of Virology Muenster, Westfaelische Wilhelms-University Muenster, Muenster, Germany
- Cluster of Excellence “Cells in Motion”, Westfaelische Wilhelms-University Muenster, Muenster, Germany
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14
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Desuppression of TGF-β signaling via nuclear c-Abl-mediated phosphorylation of TIF1γ/TRIM33 at Tyr-524, -610, and -1048. Oncogene 2018; 38:637-655. [PMID: 30177833 DOI: 10.1038/s41388-018-0481-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 07/30/2018] [Accepted: 08/07/2018] [Indexed: 01/26/2023]
Abstract
Protein-tyrosine kinases regulate a broad range of intracellular processes occurring primarily just beneath the plasma membrane. With the greatest care to prevent dephosphorylation, we have shown that nuclear tyrosine phosphorylation regulates global chromatin structural states. However, the roles for tyrosine phosphorylation in the nucleus are poorly understood. Here we identify transcriptional intermediary factor 1-γ (TIF1γ/TRIM33/Ectodermin), which suppresses transforming growth factor-β (TGF-β) signaling through the association with Smad2/3 transcription factor, as a new nuclear substrate of c-Abl tyrosine kinase. Replacement of the three tyrosine residues Tyr-524, -610, and -1048 with phenylalanine (3YF) inhibits c-Abl-mediated phosphorylation of TIF1γ and enhances TIF1γ's association with Smad3. Importantly, knockdown-rescue experiments show that 3YF strengthens TIF1γ's ability to suppress TGF-β signaling. Intriguingly, activation of c-Abl by epidermal growth factor (EGF) induces desuppression of TGF-β signaling via enhancing the tyrosine phosphorylation level of TIF1γ. TGF-β together with EGF synergistically provokes desuppressive responses of epithelial-to-mesenchymal transition through tyrosine phosphorylation of TIF1γ. These results suggest that nuclear c-Abl-mediated tyrosine phosphorylation of TIF1γ has a desuppressive role in TGF-β-Smad2/3 signaling.
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15
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Takakura Y, Yamaguchi N, Honda T, Morii M, Yuki R, Nakayama Y, Yamaguchi N. The Truncated Isoform of the Receptor Tyrosine Kinase ALK Generated by Alternative Transcription Initiation (ALK ATI) Induces Chromatin Structural Changes in the Nucleus in a Kinase Activity-Dependent Manner. Biol Pharm Bull 2018; 40:1968-1975. [PMID: 29093346 DOI: 10.1248/bpb.b17-00548] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Anaplastic lymphoma kinase (ALK) is a receptor-type tyrosine kinase that promotes cell growth upon stimulation with ligands such as midkine and pleiotrophin. Recently, a truncated isoform of ALK was identified in a variety of tumors. This isoform is expressed from a novel ALK transcript initiated from a de novo alternative transcription initiation (ATI) site in ALK intron 19 (referred to as ALKATI). ALKATI, which consists of only the intracellular kinase domain, localizes to the nucleus as well as the cytoplasm. However, its nuclear role is unknown. In this study, we determined that ALKATI promoted chromatin structural changes in the nucleus in a kinase activity-dependent manner. We found that expression of ALKATI increased the level of the heterochromatin marker Lys9 tri-methylated histone H3. In addition, we demonstrated that ALKATI phosphorylated the nuclear protein A-kinase anchoring protein 8 (AKAP8) and altered its subcellular localization from the insoluble fraction to the soluble fraction. These results suggest that ALKATI induces chromatin structural changes and heterochromatinization through phosphorylation of AKAP8 in the nucleus.
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Affiliation(s)
- Yuki Takakura
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Takuya Honda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Mariko Morii
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Ryuzaburo Yuki
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Yuji Nakayama
- Department of Biochemistry and Molecular Biology, Kyoto Pharmaceutical University
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
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16
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Honda T, Morii M, Nakayama Y, Suzuki K, Yamaguchi N, Yamaguchi N. v-Src-driven transformation is due to chromosome abnormalities but not Src-mediated growth signaling. Sci Rep 2018; 8:1063. [PMID: 29348492 PMCID: PMC5773541 DOI: 10.1038/s41598-018-19599-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 01/04/2018] [Indexed: 12/03/2022] Open
Abstract
v-Src is the first identified oncogene product and has a strong tyrosine kinase activity. Much of the literature indicates that v-Src expression induces anchorage-independent and infinite cell proliferation through continuous stimulation of growth signaling by v-Src activity. Although all of v-Src-expressing cells are supposed to form transformed colonies, low frequencies of v-Src-induced colony formation have been observed so far. Using cells that exhibit high expression efficiencies of inducible v-Src, we show that v-Src expression causes cell-cycle arrest through p21 up-regulation despite ERK activation. v-Src expression also induces chromosome abnormalities and unexpected suppression of v-Src expression, leading to p21 down-regulation and ERK inactivation. Importantly, among v-Src-suppressed cells, only a limited number of cells gain the ability to re-proliferate and form transformed colonies. Our findings provide the first evidence that v-Src-driven transformation is attributed to chromosome abnormalities, but not continuous stimulation of growth signaling, possibly through stochastic genetic alterations.
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Affiliation(s)
- Takuya Honda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Mariko Morii
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Yuji Nakayama
- Department of Biochemistry and Molecular Biology, Kyoto Pharmaceutical University, Kyoto, 607-8414, Japan
| | - Ko Suzuki
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan.
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17
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Liu H, Wei Q, Huang C, Zhang Y, Guo Z. Potential Roles of Intrinsic Disorder in Maternal-Effect Proteins Involved in the Maintenance of DNA Methylation. Int J Mol Sci 2017; 18:E1898. [PMID: 28869544 PMCID: PMC5618547 DOI: 10.3390/ijms18091898] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 01/14/2023] Open
Abstract
DNA methylation is an important epigenetic modification that needs to be carefully controlled as a prerequisite for normal early embryogenesis. Compelling evidence now suggests that four maternal-effect proteins, primordial germ cell 7 (PGC7), zinc finger protein 57 (ZFP57), tripartite motif-containing 28 (TRIM28) and DNA methyltransferase (cytosine-5) 1 (DNMT1) are involved in the maintenance of DNA methylation. However, it is still not fully understood how these maternal-effect proteins maintain the DNA methylation imprint. We noticed that a feature common to these proteins is the presence of significant levels of intrinsic disorder so in this study we started from an intrinsic disorder perspective to try to understand these maternal-effect proteins. To do this, we firstly analysed the intrinsic disorder predispositions of PGC7, ZFP57, TRIM28 and DNMT1 by using a set of currently available computational tools and secondly conducted an intensive literature search to collect information on their interacting partners and structural characterization. Finally, we discuss the potential effect of intrinsic disorder on the function of these proteins in maintaining DNA methylation.
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Affiliation(s)
- Hongliang Liu
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Northwest A&F University, Yangling 712100, China.
| | - Qing Wei
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Northwest A&F University, Yangling 712100, China.
- College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China.
| | - Chenyang Huang
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Northwest A&F University, Yangling 712100, China.
| | - Yong Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Northwest A&F University, Yangling 712100, China.
| | - Zekun Guo
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China.
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture, Northwest A&F University, Yangling 712100, China.
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18
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Yamaguchi N, Shibazaki M, Yamada C, Anzai E, Morii M, Nakayama Y, Kuga T, Hashimoto Y, Tomonaga T, Yamaguchi N. Tyrosine Phosphorylation of the Pioneer Transcription Factor FoxA1 Promotes Activation of Estrogen Signaling. J Cell Biochem 2016; 118:1453-1461. [DOI: 10.1002/jcb.25804] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 11/21/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Noritaka Yamaguchi
- Laboratory of Molecular Cell BiologyGraduate School of Pharmaceutical SciencesChiba UniversityChiba260‐8675Japan
| | - Misato Shibazaki
- Laboratory of Molecular Cell BiologyGraduate School of Pharmaceutical SciencesChiba UniversityChiba260‐8675Japan
| | - Chiaki Yamada
- Laboratory of Molecular Cell BiologyGraduate School of Pharmaceutical SciencesChiba UniversityChiba260‐8675Japan
| | - Erina Anzai
- Laboratory of Molecular Cell BiologyGraduate School of Pharmaceutical SciencesChiba UniversityChiba260‐8675Japan
| | - Mariko Morii
- Laboratory of Molecular Cell BiologyGraduate School of Pharmaceutical SciencesChiba UniversityChiba260‐8675Japan
| | - Yuji Nakayama
- Department of Biochemistry and Molecular BiologyKyoto Pharmaceutical UniversityKyoto607‐8414Japan
| | - Takahisa Kuga
- Department of Biochemistry and Molecular BiologyKyoto Pharmaceutical UniversityKyoto607‐8414Japan
| | - Yuuki Hashimoto
- Laboratory of Proteome ResearchNational Institutes of Biomedical InnovationHealth and NutritionIbarakiOsaka567‐0085Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome ResearchNational Institutes of Biomedical InnovationHealth and NutritionIbarakiOsaka567‐0085Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell BiologyGraduate School of Pharmaceutical SciencesChiba UniversityChiba260‐8675Japan
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19
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Paladino D, Yue P, Furuya H, Acoba J, Rosser CJ, Turkson J. A novel nuclear Src and p300 signaling axis controls migratory and invasive behavior in pancreatic cancer. Oncotarget 2016; 7:7253-67. [PMID: 26695438 PMCID: PMC4872783 DOI: 10.18632/oncotarget.6635] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 11/23/2015] [Indexed: 12/23/2022] Open
Abstract
The presence of Src in the nuclear compartment has been previously reported, although its significance has remained largely unknown. We sought to delineate the functions of the nuclear pool of Src within the context of malignant progression. Active Src is localized within the nuclei of human pancreatic cancer cells and mouse fibroblasts over-expressing c-Src where it is associated with p300. Nuclear Src additionally promotes the tyrosine phosphorylation of p300 in pancreatic cancer Panc-1 cells. Src, together with p300, is associated with the high-mobility group AT-hook (HMGA)2 and SET and MYND domain-containing protein (SMYD)3 gene promoters and regulates their expression in a Src-dependent manner. These nuclear Src-dependent events correlate with anchorage-independent soft-agar growth and the migratory properties in both pancreatic Panc-1 cells and mouse fibroblasts over-expressing Src. Moreover, analyses of human pancreatic ductal adenocarcinoma (PDAC) tumor tissues detected the association of nuclear Src with the HMGA2 and SMYD3 gene promoters. Our findings for the first time show the critical importance of nuclear Src and p300 function in the migratory properties of pancreatic cancer cells. Further, data together identify a previously unknown role of nuclear Src in the regulation of gene expression in association with p300 within the context of cells harboring activated or over-expressing Src. This novel mechanism of nuclear Src-p300 axis in PDAC invasiveness and metastasis may provide an opportunity for developing more effective early clinical interventions for this lethal disease. Active Src is complexed with and phosphorylates p300 in the nucleus, and the complex is bound to HMGA2 and SMYD3 genes, thereby regulating their expression to promote pancreatic tumor cell migration and invasiveness.
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Affiliation(s)
- David Paladino
- Natural Products and Experimental Therapeutics Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA.,Cancer Biology Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA
| | - Peibin Yue
- Natural Products and Experimental Therapeutics Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA.,Cancer Biology Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA
| | - Hideki Furuya
- Clinical and Translational Research Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA
| | - Jared Acoba
- Clinical and Translational Research Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA
| | - Charles J Rosser
- Clinical and Translational Research Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA
| | - James Turkson
- Natural Products and Experimental Therapeutics Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA.,Cancer Biology Program, University of Hawaii Cancer Center, University of Hawaii, Manoa, Honolulu, HI 96813, USA
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20
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Morii M, Kubota S, Honda T, Yuki R, Morinaga T, Kuga T, Tomonaga T, Yamaguchi N, Yamaguchi N. Src Acts as an Effector for Ku70-dependent Suppression of Apoptosis through Phosphorylation of Ku70 at Tyr-530. J Biol Chem 2016; 292:1648-1665. [PMID: 27998981 DOI: 10.1074/jbc.m116.753202] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 12/16/2016] [Indexed: 11/06/2022] Open
Abstract
Src-family tyrosine kinases are widely expressed in many cell types and participate in a variety of signal transduction pathways. Despite the significance of Src in suppression of apoptosis, its mechanism remains poorly understood. Here we show that Src acts as an effector for Ku70-dependent suppression of apoptosis. Inhibition of endogenous Src activity promotes UV-induced apoptosis, which is impaired by Ku70 knockdown. Src phosphorylates Ku70 at Tyr-530, being close to the possible acetylation sites involved in promotion of apoptosis. Src-mediated phosphorylation of Ku70 at Tyr-530 decreases acetylation of Ku70, whereas Src inhibition augments acetylation of Ku70. Importantly, knockdown-rescue experiments with stable Ku70 knockdown cells show that the nonphosphorylatable Y530F mutant of Ku70 reduces the ability of Ku70 to suppress apoptosis accompanied by augmentation of Ku70 acetylation. Our results reveal that Src plays a protective role against hyperactive apoptotic cell death by reducing apoptotic susceptibility through phosphorylation of Ku70 at Tyr-530.
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Affiliation(s)
- Mariko Morii
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Sho Kubota
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Takuya Honda
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Ryuzaburo Yuki
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Takao Morinaga
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Takahisa Kuga
- the Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
| | - Takeshi Tomonaga
- the Laboratory of Proteome Research, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
| | - Noritaka Yamaguchi
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Naoto Yamaguchi
- From the Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan.
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21
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Honda T, Soeda S, Tsuda K, Yamaguchi C, Aoyama K, Morinaga T, Yuki R, Nakayama Y, Yamaguchi N, Yamaguchi N. Protective role for lipid modifications of Src-family kinases against chromosome missegregation. Sci Rep 2016; 6:38751. [PMID: 27941902 PMCID: PMC5150256 DOI: 10.1038/srep38751] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 11/15/2016] [Indexed: 11/10/2022] Open
Abstract
Src-family tyrosine kinases, which are expressed in various cell types, play critical roles in cell signalling at the cytoplasmic side of the plasma membrane through their lipid modifications. Src-family kinases are cotranslationally myristoylated and posttranslationally palmitoylated in the amino-terminal region. The Src-family member Lyn contains a myristoylation site at glycine-2 and a palmitoylation site at cysteine-3, whereas c-Src has a myristoylation site at glycine-2 but not any palmitoylation sites. However, little is known about the role for lipid modifications of Src-family kinases in cell division. Here, we show that non-lipid-modified Lyn and c-Src, Lyn(G2A/C3A) and c-Src(G2A), are delocalized from membranes to the cytoplasm and the nucleus, which gives rise to a significant increase in the rate of chromosome missegregation, such as chromosome lagging and anaphase chromosome bridging, in a tyrosine kinase activity-dependent manner. Treatment with the Src inhibitor PP2 shows that the kinase activity of non-lipid-modified, non-membrane-bound Src during M phase is critical for giving rise to chromosome missegregation. Given that only a fraction of Src-family kinases fails in lipid modifications during biosynthesis, these results suggest that Src’s membrane anchorage through their lipid modifications from prophase to anaphase plays a protective role against induction of chromosome missegregation.
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Affiliation(s)
- Takuya Honda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Shuhei Soeda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Kunihiko Tsuda
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Chihiro Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Kazumasa Aoyama
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Takao Morinaga
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Ryuzaburo Yuki
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Yuji Nakayama
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan.,Department of Biochemistry and Molecular Biology, Kyoto Pharmaceutical University, Kyoto 607-8414, Japan
| | - Noritaka Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
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22
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Cesaro E, Sodaro G, Montano G, Grosso M, Lupo A, Costanzo P. The Complex Role of the ZNF224 Transcription Factor in Cancer. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2016; 107:191-222. [PMID: 28215224 DOI: 10.1016/bs.apcsb.2016.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
ZNF224 is a member of the Kruppel-associated box zinc finger proteins (KRAB-ZFPs) family. It was originally identified as a transcriptional repressor involved in gene-specific silencing through the recruitment of the corepressor KAP1, chromatin-modifying activities, and the arginine methyltransferase PRMT5 on the promoter of its target genes. Recent findings indicate that ZNF224 can behave both as a tumor suppressor or an oncogene in different human cancers. The transcriptional regulatory properties of ZNF224 in these systems appear to be complex and influenced by specific sets of interactors. ZNF224 can also act as a transcription cofactor for other DNA-binding proteins. A role for ZNF224 in transcriptional activation has also emerged. Here, we review the state of the literature supporting both roles of ZNF224 in cancer. We also examine the functional activity of ZNF224 as a transcription factor and the influence of protein partners on its dual behavior. Increasing information on the mechanism through which ZNF224 can operate could lead to the identification of agents capable of modulating ZNF224 function, thus potentially paving the way to new therapeutic strategies for treatment of cancer.
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Affiliation(s)
- E Cesaro
- University of Naples Federico II, Naples, Italy
| | - G Sodaro
- University of Naples Federico II, Naples, Italy
| | - G Montano
- BioMedical Center, Lund University, Lund, Sweden
| | - M Grosso
- University of Naples Federico II, Naples, Italy
| | - A Lupo
- University of Sannio, Benevento, Italy
| | - P Costanzo
- University of Naples Federico II, Naples, Italy.
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23
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Yuki R, Aoyama K, Kubota S, Yamaguchi N, Kubota S, Hasegawa H, Morii M, Huang X, Liu K, Williams R, Fukuda MN, Yamaguchi N. Overexpression of zinc-finger protein 777 (ZNF777) inhibits proliferation at low cell density through down-regulation of FAM129A. J Cell Biochem 2016; 116:954-68. [PMID: 25560148 DOI: 10.1002/jcb.25046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 12/16/2014] [Indexed: 01/01/2023]
Abstract
Krüppel-associated box-containing zinc finger proteins (KRAB-ZFPs) regulate a wide range of cellular processes. KRAB-ZFPs have a KRAB domain, which binds to transcriptional corepressors, and a zinc finger domain, which binds to DNA to activate or repress gene transcription. Here, we characterize ZNF777, a member of KRAB-ZFPs. We show that ZNF777 localizes to the nucleus and inducible overexpression of ZNF777 inhibits cell proliferation in a manner dependent on its zinc finger domain but independent of its KRAB domain. Intriguingly, ZNF777 overexpression drastically inhibits cell proliferation at low cell density but slightly inhibits cell proliferation at high cell density. Furthermore, ZNF777 overexpression decreases the mRNA level of FAM129A irrespective of cell density. Importantly, the protein level of FAM129A strongly decreases at low cell density, but at high cell density the protein level of FAM129A does not decrease to that observed at low cell density. ZNF777-mediated inhibition of cell proliferation is attenuated by overexpression of FAM129A at low cell density. Furthermore, ZNF777-mediated down-regulation of FAM129A induces moderate levels of the cyclin-dependent kinase inhibitor p21. These results suggest that ZNF777 overexpression inhibits cell proliferation at low cell density and that p21 induction by ZNF777-mediated down-regulation of FAM129A plays a role in inhibition of cell proliferation.
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Affiliation(s)
- Ryuzaburo Yuki
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
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24
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Abstract
Hsp90 plays a key role in fostering metabolic pathways essential in tumorigenesis through its functions as a molecular chaperone. Multiple oncogenic factors in the membrane and cytoplasm are thus protected from degradation and destruction. Here, we have considered Hsp90's role in transcription in the nucleus. Hsp90 functions both in regulating the activity of sequence-specific transcription factors such as nuclear receptors and HSF1, as well as impacting more globally acting factors that act on chromatin and RNA polymerase II. Hsp90 influences transcription by modulating histone modification mediated by its clients SMYD3 and trithorax/MLL, as well as by regulating the processivity of RNA polymerase II through negative elongation factor. It is not currently clear how the transcriptional role of Hsp90 may be influenced by the cancer milieu although recently discovered posttranslational modification of the chaperone may be involved. Dysregulation of Hsp90 may thus influence malignant processes both by modulating the function of specific transcription factors and effects on more globally acting general components of the transcriptional machinery.
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Affiliation(s)
- Stuart K Calderwood
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.
| | - Len Neckers
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
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25
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Bunch H, Calderwood SK. TRIM28 as a novel transcriptional elongation factor. BMC Mol Biol 2015; 16:14. [PMID: 26293668 PMCID: PMC4545989 DOI: 10.1186/s12867-015-0040-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 05/22/2015] [Indexed: 12/21/2022] Open
Abstract
TRIM28 is a multidomain protein with versatile functions in transcription and DNA repair. Recently it was shown that this factor plays unanticipated roles in transcriptional elongation. TRIM28 was shown to stabilize the pausing of RNA polymerase II (Pol II) close to the transcriptional start site in many unactivated genes, permitting Pol II accumulation and readying genes for induction. In addition, the factor was shown to respond rapidly to signals accompanying transcriptional activation permitting the productive elongation of RNA by previously paused Pol II. We discuss here critical regulatory mechanisms of TRIM28 in transcriptional control and DNA repair that may illuminate the novel roles of this factor in pausing and elongation of Pol II.
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Affiliation(s)
- Heeyoun Bunch
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Center for Life Sciences, 3 Blackfan circle, Boston, MA, 02115, USA.
| | - Stuart K Calderwood
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Center for Life Sciences, 3 Blackfan circle, Boston, MA, 02115, USA.
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26
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c-Abl-mediated tyrosine phosphorylation of JunB is required for Adriamycin-induced expression of p21. Biochem J 2015. [PMID: 26217035 DOI: 10.1042/bj20150372] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The non-receptor-type tyrosine kinase c-Abl functions as a cytoplasmic signal transducer upon activation of cell-surface receptors. c-Abl is also involved in DDR (DNA-damage response), which is initiated in the nucleus, whereas its molecular functions in DDR are not fully understood. In the present study, we found that c-Abl phosphorylates JunB, a member of the AP-1 (activator protein 1) transcription factor family. Because JunB was suggested to be involved in DDR, we analysed the role of c-Abl-mediated phosphorylation of JunB in DDR. We first analysed phosphorylation sites of JunB and found that c-Abl majorly phosphorylates JunB at Tyr(173), Tyr(182) and Tyr(188). Because c-Abl promotes expression of the cyclin-dependent kinase inhibitor p21 upon stimulation with the DNA-damaging agent Adriamycin (doxorubicin), we analysed the involvement of JunB in Adriamycin-induced p21 expression. We found that JunB suppresses p21 induction through inhibition of its promoter activity. The phosphomimetic JunB, which was generated by glutamic acid substitutions at the phosphorylation sites, failed to repress p21 induction. Recruitment of JunB to the p21 promoter was promoted by Adriamycin stimulation and was further enhanced by co-treatment with the c-Abl inhibitor imatinib. The phosphomimetic glutamic acid substitutions in JunB or Adriamycin treatment impaired the JunB-c-Fos transcription factor complex formation. Taken together, these results suggest that, although JunB represses p21 promoter activity, c-Abl phosphorylates JunB and conversely inhibits its suppressive role on p21 promoter activity upon Adriamycin stimulation. Therefore JunB is likely to be a key target of c-Abl in expression of p21 in Adriamycin-induced DDR.
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27
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Morii M, Fukumoto Y, Kubota S, Yamaguchi N, Nakayama Y, Yamaguchi N. Imatinib inhibits inactivation of the ATM/ATR signaling pathway and recovery from adriamycin/doxorubicin-induced DNA damage checkpoint arrest. Cell Biol Int 2015; 39:923-32. [DOI: 10.1002/cbin.10460] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 03/06/2015] [Indexed: 01/16/2023]
Affiliation(s)
- Mariko Morii
- Department of Molecular Cell Biology; Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675 Japan
| | - Yasunori Fukumoto
- Department of Molecular Cell Biology; Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675 Japan
| | - Sho Kubota
- Department of Molecular Cell Biology; Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675 Japan
| | - Noritaka Yamaguchi
- Department of Molecular Cell Biology; Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675 Japan
| | - Yuji Nakayama
- Department of Molecular Cell Biology; Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675 Japan
- Present address: Department of Biochemistry & Molecular Biology; Kyoto Pharmaceutical University; Kyoto 607-8414 Japan
| | - Naoto Yamaguchi
- Department of Molecular Cell Biology; Graduate School of Pharmaceutical Sciences, Chiba University; Chiba 260-8675 Japan
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28
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Kubota S, Morii M, Yuki R, Yamaguchi N, Yamaguchi H, Aoyama K, Kuga T, Tomonaga T, Yamaguchi N. Role for Tyrosine Phosphorylation of A-kinase Anchoring Protein 8 (AKAP8) in Its Dissociation from Chromatin and the Nuclear Matrix. J Biol Chem 2015; 290:10891-904. [PMID: 25770215 PMCID: PMC4409252 DOI: 10.1074/jbc.m115.643882] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 03/13/2015] [Indexed: 11/06/2022] Open
Abstract
Protein-tyrosine phosphorylation regulates a wide variety of cellular processes at the plasma membrane. Recently, we showed that nuclear tyrosine kinases induce global nuclear structure changes, which we called chromatin structural changes. However, the mechanisms are not fully understood. In this study we identify protein kinase A anchoring protein 8 (AKAP8/AKAP95), which associates with chromatin and the nuclear matrix, as a nuclear tyrosine-phosphorylated protein. Tyrosine phosphorylation of AKAP8 is induced by several tyrosine kinases, such as Src, Fyn, and c-Abl but not Syk. Nucleus-targeted Lyn and c-Src strongly dissociate AKAP8 from chromatin and the nuclear matrix in a kinase activity-dependent manner. The levels of tyrosine phosphorylation of AKAP8 are decreased by substitution of multiple tyrosine residues on AKAP8 into phenylalanine. Importantly, the phenylalanine mutations of AKAP8 inhibit its dissociation from nuclear structures, suggesting that the association/dissociation of AKAP8 with/from nuclear structures is regulated by its tyrosine phosphorylation. Furthermore, the phenylalanine mutations of AKAP8 suppress the levels of nuclear tyrosine kinase-induced chromatin structural changes. In contrast, AKAP8 knockdown increases the levels of chromatin structural changes. Intriguingly, stimulation with hydrogen peroxide induces chromatin structural changes accompanied by the dissociation of AKAP8 from nuclear structures. These results suggest that AKAP8 is involved in the regulation of chromatin structural changes through nuclear tyrosine phosphorylation.
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Affiliation(s)
- Sho Kubota
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
| | - Mariko Morii
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
| | - Ryuzaburo Yuki
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
| | - Noritaka Yamaguchi
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
| | - Hiromi Yamaguchi
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
| | - Kazumasa Aoyama
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
| | - Takahisa Kuga
- Laboratory of Proteome Research, National Institute of Biomedical Innovation, Ibaraki, Osaka 567-0085, Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research, National Institute of Biomedical Innovation, Ibaraki, Osaka 567-0085, Japan
| | - Naoto Yamaguchi
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
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29
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di Caprio R, Ciano M, Montano G, Costanzo P, Cesaro E. KAP1 is a Novel Substrate for the Arginine Methyltransferase PRMT5. BIOLOGY 2015; 4:41-9. [PMID: 25585209 PMCID: PMC4381216 DOI: 10.3390/biology4010041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/04/2015] [Indexed: 11/16/2022]
Abstract
KRAB-associated protein 1 (KAP1), the transcriptional corepressor of Kruppel-associated box zinc finger proteins (KRAB-ZFPs), is subjected to multiple post-translational modifications that are involved in fine-tuning of the multiple biological functions of KAP1. In previous papers, we analyzed the KAP1-dependent molecular mechanism of transcriptional repression mediated by ZNF224, a member of the KRAB-ZFP family, and identified the protein arginine methyltransferase PRMT5 as a component of the ZNF224 repression complex. We demonstrated that PRMT5-mediated histone arginine methylation is required to elicit ZNF224 transcriptional repression. In this study, we show that KAP1 interacts with PRMT5 and is a novel substrate for PRMT5 methylation. Also, we present evidence that the methylation of KAP1 arginine residues regulate the KAP1-ZNF224 interaction, thus suggesting that this KAP1 post-translational modification could actively contribute to the regulation of ZNF224-mediated repression.
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Affiliation(s)
- Roberta di Caprio
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, via S. Pansini 5, Naples 80131, Italy.
| | - Michela Ciano
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, via S. Pansini 5, Naples 80131, Italy.
| | - Giorgia Montano
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, via S. Pansini 5, Naples 80131, Italy.
| | - Paola Costanzo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, via S. Pansini 5, Naples 80131, Italy.
| | - Elena Cesaro
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, via S. Pansini 5, Naples 80131, Italy.
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30
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Aoyama K, Yamaguchi N, Yuki R, Morii M, Kubota S, Hirata K, Abe K, Honda T, Kuga T, Hashimoto Y, Tomonaga T, Yamaguchi N. c-Abl induces stabilization of histone deacetylase 1 (HDAC1) in a kinase activity-dependent manner. Cell Biol Int 2015; 39:446-56. [PMID: 25561363 DOI: 10.1002/cbin.10413] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 12/10/2014] [Indexed: 12/21/2022]
Abstract
c-Abl is a non-receptor-type tyrosine kinase that regulates various cellular events, including cell proliferation, differentiation, and apoptosis, through phosphorylation of cytoplasmic and nuclear targets. Although we showed that c-Abl induces histone deacetylation, the molecular mechanisms of this phenomenon are largely unknown. Here, we analyzed the effect of c-Abl on the expression of histone deacetylase 1 (HDAC1), because c-Abl was shown to be involved in maintenance of nuclear protein levels of HDAC1. Co-transfection of HDAC1 with c-Abl increased the levels of HDAC1 protein in a kinase activity-dependent manner without affecting its mRNA levels. Treatment with the proteasome inhibitor MG132 increased protein levels of HDAC1 in cells transfected with HDAC1 but not in cells co-transfected with HDAC1 and c-Abl. Among class I HDACs, knockdown of endogenous c-Abl preferentially suppressed endogenous protein levels of HDAC1, suggesting that c-Abl stabilizes HDAC1 protein by inhibiting its proteasomal degradation. Subcellular fractionation showed that the stabilization of HDAC1 by c-Abl occurred in the nucleus. Despite the fact that HDAC1 was phosphorylated by co-expression with c-Abl, stabilization of HDAC1 by c-Abl was not affected by mutations in its sites phosphorylated by c-Abl. Co-expression with HDAC1 and nuclear-targeted c-Abl did not affect HDAC1 stabilization. Therefore, these results suggest that c-Abl induces HDAC1 stabilization possibly through phosphorylation of a cytoplasmic target that is involved in proteasomal degradation of HDAC1.
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Affiliation(s)
- Kazumasa Aoyama
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
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31
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Cdk1-mediated phosphorylation of human ATF7 at Thr-51 and Thr-53 promotes cell-cycle progression into M phase. PLoS One 2014; 9:e116048. [PMID: 25545367 PMCID: PMC4278844 DOI: 10.1371/journal.pone.0116048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 11/30/2014] [Indexed: 12/22/2022] Open
Abstract
Activating transcription factor 2 (ATF2) and its homolog ATF7 are phosphorylated at Thr-69/Thr-71 and at Thr-51/Thr-53, respectively, by stress-activated MAPKs regulating their transcriptional functions in G1 and S phases. However, little is known about the role of ATF2 and ATF7 in G2/M phase. Here, we show that Cdk1-cyclin B1 phosphorylates ATF2 at Thr-69/Thr-71 and ATF7 at Thr-51/Thr-53 from early prophase to anaphase in the absence of any stress stimulation. Knockdown of ATF2 or ATF7 decreases the rate of cell proliferation and the number of cells in M-phase. In particular, the knockdown of ATF7 severely inhibits cell proliferation and G2/M progression. The inducible expression of a mitotically nonphosphorylatable version of ATF7 inhibits G2/M progression despite the presence of endogenous ATF7. We also show that mitotic phosphorylation of ATF7 promotes the activation of Aurora kinases, which are key enzymes for early mitotic events. These results suggest that the Cdk1-mediated phosphorylation of ATF7 facilitates G2/M progression, at least in part, by enabling Aurora signaling.
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32
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Fukumoto Y, Kuki K, Morii M, Miura T, Honda T, Ishibashi K, Hasegawa H, Kubota S, Ide Y, Yamaguchi N, Nakayama Y, Yamaguchi N. Lyn tyrosine kinase promotes silencing of ATM-dependent checkpoint signaling during recovery from DNA double-strand breaks. Biochem Biophys Res Commun 2014; 452:542-7. [DOI: 10.1016/j.bbrc.2014.08.113] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 08/21/2014] [Indexed: 11/30/2022]
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33
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Cheng CT, Kuo CY, Ann DK. KAPtain in charge of multiple missions: Emerging roles of KAP1. World J Biol Chem 2014; 5:308-320. [PMID: 25225599 PMCID: PMC4160525 DOI: 10.4331/wjbc.v5.i3.308] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 03/21/2014] [Accepted: 06/20/2014] [Indexed: 02/05/2023] Open
Abstract
KAP1/TRIM28/TIF1β was identified nearly twenty years ago as a universal transcriptional co-repressor because it interacts with a large KRAB-containing zinc finger protein (KRAB-ZFP) transcription factor family. Many studies demonstrate that KAP1 affects gene expression by regulating the transcription of KRAB-ZFP-specific loci, trans-repressing as a transcriptional co-repressor or epigenetically modulating chromatin structure. Emerging evidence suggests that KAP1 also functions independent of gene regulation by serving as a SUMO/ubiquitin E3 ligase or signaling scaffold protein to mediate signal transduction. KAP1 is subjected to multiple post-translational modifications (PTMs), including serine/tyrosine phosphorylation, SUMOylation, and acetylation, which coordinately regulate KAP1 function and its protein abundance. KAP1 is involved in multiple aspects of cellular activities, including DNA damage response, virus replication, cytokine production and stem cell pluripotency. Moreover, knockout of KAP1 results in embryonic lethality, indicating that KAP1 is crucial for embryonic development and possibly impacts a wide-range of (patho)physiological manifestations. Indeed, studies from conditional knockout mouse models reveal that KAP1-deficiency significantly impairs vital physiological processes, such as immune maturation, stress vulnerability, hepatic metabolism, gamete development and erythropoiesis. In this review, we summarize and evaluate current literatures involving the biochemical and physiological functions of KAP1. In addition, increasing studies on the clinical relevance of KAP1 in cancer will also be discussed.
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Fukumoto Y, Miura T, Morii M, Kubota S, Honda T, Kubota S, Morinaga T, Yamaguchi N, Nakayama Y, Yamaguchi N. v-Src inhibits the interaction between Rad17 and Rad9 and induces replication fork collapse. Biochem Biophys Res Commun 2014; 450:885-90. [DOI: 10.1016/j.bbrc.2014.06.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 06/17/2014] [Indexed: 12/27/2022]
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Fukumoto Y, Morii M, Miura T, Kubota S, Ishibashi K, Honda T, Okamoto A, Yamaguchi N, Iwama A, Nakayama Y, Yamaguchi N. Src family kinases promote silencing of ATR-Chk1 signaling in termination of DNA damage checkpoint. J Biol Chem 2014; 289:12313-29. [PMID: 24634213 DOI: 10.1074/jbc.m113.533752] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The DNA damage checkpoint arrests cell cycle progression to allow time for repair. Once DNA repair is completed, checkpoint signaling is terminated. Currently little is known about the mechanism by which checkpoint signaling is terminated, and the disappearance of DNA lesions is considered to induce the end of checkpoint signaling; however, here we show that the termination of checkpoint signaling is an active process promoted by Src family tyrosine kinases. Inhibition of Src activity delays recovery from the G2 phase DNA damage checkpoint following DNA repair. Src activity is required for the termination of checkpoint signaling, and inhibition of Src activity induces persistent activation of ataxia telangiectasia mutated (ATM)- and Rad3-related (ATR) and Chk1 kinases. Src-dependent nuclear protein tyrosine phosphorylation and v-Src expression suppress the ATR-mediated Chk1 and Rad17 phosphorylation induced by DNA double strand breaks or DNA replication stress. Thus, Src family kinases promote checkpoint recovery through termination of ATR- and Chk1-dependent G2 DNA damage checkpoint. These results suggest a model according to which Src family kinases send a termination signal between the completion of DNA repair and the initiation of checkpoint termination.
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Affiliation(s)
- Yasunori Fukumoto
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan and
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Kubota S, Fukumoto Y, Ishibashi K, Soeda S, Kubota S, Yuki R, Nakayama Y, Aoyama K, Yamaguchi N, Yamaguchi N. Activation of the prereplication complex is blocked by mimosine through reactive oxygen species-activated ataxia telangiectasia mutated (ATM) protein without DNA damage. J Biol Chem 2014; 289:5730-46. [PMID: 24421316 DOI: 10.1074/jbc.m113.546655] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mimosine is an effective cell synchronization reagent used for arresting cells in late G1 phase. However, the mechanism underlying mimosine-induced G1 cell cycle arrest remains unclear. Using highly synchronous cell populations, we show here that mimosine blocks S phase entry through ATM activation. HeLa S3 cells are exposed to thymidine for 15 h, released for 9 h by washing out the thymidine, and subsequently treated with 1 mM mimosine for a further 15 h (thymidine → mimosine). In contrast to thymidine-induced S phase arrest, mimosine treatment synchronizes >90% of cells at the G1-S phase boundary by inhibiting the transition of the prereplication complex to the preinitiation complex. Mimosine treatment activates ataxia telangiectasia mutated (ATM)/ataxia telangiectasia and Rad3-related (ATR)-mediated checkpoint signaling without inducing DNA damage. Inhibition of ATM activity is found to induce mimosine-arrested cells to enter S phase. In addition, ATM activation by mimosine treatment is mediated by reactive oxygen species (ROS). These results suggest that, upon mimosine treatment, ATM blocks S phase entry in response to ROS, which prevents replication fork stalling-induced DNA damage.
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Affiliation(s)
- Shoichi Kubota
- From the Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
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Tragulpakseerojn J, Yuki R, Honda T, Morii M, Apirakaramwong A, Yamaguchi N, Pamonsinlapatham P, Yamaguchi N. Apoptotic activities of the extract from Moringa oleifera leaves on human HCT116 colon cancer cells. ACTA ACUST UNITED AC 2014. [DOI: 10.2131/fts.1.143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Jintana Tragulpakseerojn
- Biopharmacy Department, Faculty of Pharmacy, Silpakorn University, Thailand
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Ryuzaburo Yuki
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Takuya Honda
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Mariko Morii
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | | | - Noritaka Yamaguchi
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
| | | | - Naoto Yamaguchi
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University
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Formation of long and winding nuclear F-actin bundles by nuclear c-Abl tyrosine kinase. Exp Cell Res 2013; 319:3251-68. [DOI: 10.1016/j.yexcr.2013.09.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 08/09/2013] [Accepted: 09/06/2013] [Indexed: 12/20/2022]
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