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Gaudreau-Lapierre A, Klonisch T, Nicolas H, Thanasupawat T, Trinkle-Mulcahy L, Hombach-Klonisch S. Nuclear High Mobility Group A2 (HMGA2) Interactome Revealed by Biotin Proximity Labeling. Int J Mol Sci 2023; 24:ijms24044246. [PMID: 36835656 PMCID: PMC9966875 DOI: 10.3390/ijms24044246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/23/2023] Open
Abstract
The non-histone chromatin binding protein High Mobility Group AT-hook protein 2 (HMGA2) has important functions in chromatin remodeling, and genome maintenance and protection. Expression of HMGA2 is highest in embryonic stem cells, declines during cell differentiation and cell aging, but it is re-expressed in some cancers, where high HMGA2 expression frequently coincides with a poor prognosis. The nuclear functions of HMGA2 cannot be explained by binding to chromatin alone but involve complex interactions with other proteins that are incompletely understood. The present study used biotin proximity labeling, followed by proteomic analysis, to identify the nuclear interaction partners of HMGA2. We tested two different biotin ligase HMGA2 constructs (BioID2 and miniTurbo) with similar results, and identified known and new HMGA2 interaction partners, with functionalities mainly in chromatin biology. These HMGA2 biotin ligase fusion constructs offer exciting new possibilities for interactome discovery research, enabling the monitoring of nuclear HMGA2 interactomes during drug treatments.
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Affiliation(s)
- Antoine Gaudreau-Lapierre
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Thomas Klonisch
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
- Department of Pathology, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
- Department of Medical Microbiology & Infectious Diseases, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
- Research Institute in Oncology and Hematology (RIOH), CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Hannah Nicolas
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Thatchawan Thanasupawat
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Laura Trinkle-Mulcahy
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Sabine Hombach-Klonisch
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
- Department of Pathology, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, CancerCare Manitoba, Winnipeg, MB R3T 2N2, Canada
- Correspondence: ; Tel.: +1-204-789-3982; Fax: +1-204-789-3920
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Kiyomitsu T, Boerner S. The Nuclear Mitotic Apparatus (NuMA) Protein: A Key Player for Nuclear Formation, Spindle Assembly, and Spindle Positioning. Front Cell Dev Biol 2021; 9:653801. [PMID: 33869212 PMCID: PMC8047419 DOI: 10.3389/fcell.2021.653801] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/10/2021] [Indexed: 01/10/2023] Open
Abstract
The nuclear mitotic apparatus (NuMA) protein is well conserved in vertebrates, and dynamically changes its subcellular localization from the interphase nucleus to the mitotic/meiotic spindle poles and the mitotic cell cortex. At these locations, NuMA acts as a key structural hub in nuclear formation, spindle assembly, and mitotic spindle positioning, respectively. To achieve its variable functions, NuMA interacts with multiple factors, including DNA, microtubules, the plasma membrane, importins, and cytoplasmic dynein. The binding of NuMA to dynein via its N-terminal domain drives spindle pole focusing and spindle positioning, while multiple interactions through its C-terminal region define its subcellular localizations and functions. In addition, NuMA can self-assemble into high-ordered structures which likely contribute to spindle positioning and nuclear formation. In this review, we summarize recent advances in NuMA’s domains, functions and regulations, with a focus on human NuMA, to understand how and why vertebrate NuMA participates in these functions in comparison with invertebrate NuMA-related proteins.
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Affiliation(s)
- Tomomi Kiyomitsu
- Cell Division Dynamics Unit, Okinawa Institute of Science and Technology Graduate University, Onna-son, Japan
| | - Susan Boerner
- Cell Division Dynamics Unit, Okinawa Institute of Science and Technology Graduate University, Onna-son, Japan
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Soukhtehzari S, Rasaee MJ, Javanmardi M. Production and Characterization of High-Affinity Antibodies Reactive Towards HEp-2 Cells Nuclei by Injection of an In Silico Designed Recombinant Truncated Nuclear Mitotic Apparatus Protein. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-018-9719-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Jayaraman S, Chittiboyina S, Bai Y, Abad PC, Vidi PA, Stauffacher CV, Lelièvre SA. The nuclear mitotic apparatus protein NuMA controls rDNA transcription and mediates the nucleolar stress response in a p53-independent manner. Nucleic Acids Res 2017; 45:11725-11742. [PMID: 28981686 PMCID: PMC5714241 DOI: 10.1093/nar/gkx782] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 08/30/2017] [Indexed: 12/20/2022] Open
Abstract
The nuclear mitotic apparatus protein, NuMA, is involved in major cellular events such as DNA damage response, apoptosis and p53-mediated growth-arrest, all of which are under the control of the nucleolus upon stress. Proteomic investigation has identified NuMA among hundreds of nucleolar proteins. Yet, the precise link between NuMA and nucleolar function remains undetermined. We confirm that NuMA is present in the nucleolus and reveal redistribution of NuMA upon actinomycin D or doxorubicin-induced nucleolar stress. NuMA coimmunoprecipitates with RNA polymerase I, with ribosomal proteins RPL26 and RPL24, and with components of B-WICH, an ATP-dependent chromatin remodeling complex associated with rDNA transcription. NuMA also binds to 18S and 28S rRNAs and localizes to rDNA promoter regions. Downregulation of NuMA expression triggers nucleolar stress, as shown by decreased nascent pre-rRNA synthesis, fibrillarin perinucleolar cap formation and upregulation of p27kip1, but not p53. Physiologically relevant nucleolar stress induction with reactive oxygen species reaffirms a p53-independent p27kip1 response pathway and leads to nascent pre-rRNA reduction. It also promotes the decrease in the amount of NuMA. This previously uncharacterized function of NuMA in rDNA transcription and p53-independent nucleolar stress response supports a central role for this nuclear structural protein in cellular homeostasis.
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Affiliation(s)
- Swaathi Jayaraman
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-2026, USA.,Department of Biological Sciences, Purdue University, West Lafayette, IN 47907-2026, USA
| | - Shirisha Chittiboyina
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-2026, USA
| | - Yunfeng Bai
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-2026, USA
| | - Patricia C Abad
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-2026, USA
| | - Pierre-Alexandre Vidi
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-2026, USA
| | - Cynthia V Stauffacher
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907-2026, USA.,Center for Cancer Research, Purdue University, West Lafayette, IN 47907-2026, USA
| | - Sophie A Lelièvre
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-2026, USA.,Center for Cancer Research, Purdue University, West Lafayette, IN 47907-2026, USA
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Dieker J, Iglesias-Guimarais V, Décossas M, Stevenin J, Vlag J, Yuste VJ, Muller S. Early Apoptotic Reorganization of Spliceosomal Proteins Involves Caspases, CAD and Rearrangement of NuMA. Traffic 2011; 13:257-72. [DOI: 10.1111/j.1600-0854.2011.01307.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 10/21/2011] [Accepted: 10/21/2011] [Indexed: 01/18/2023]
Affiliation(s)
| | - Victoria Iglesias-Guimarais
- Cell Death, Senescence & Survival Research Group; Dept. Bioquimica i Biologia Molecular; Institut de Neurociències; Universitat Autònoma de Barcelona; Barcelona; Spain
| | - Marion Décossas
- Centre National de la Recherche Scientifique (CNRS); Institut de Biologie Moléculaire et Cellulaire; Strasbourg; France
| | - James Stevenin
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC); Institut National de Santé et de Recherche Médicale (INSERM)/Centre National de Recherche Scientifique (CNRS); Université de Strasbourg; Illkirch; France
| | - Johan Vlag
- Nephrology Research Laboratory; Department of Nephrology; Nijmegen Centre for Molecular Life Sciences; Radboud University Nijmegen Medical Centre; Nijmegen; The Netherlands
| | - Victor J. Yuste
- Cell Death, Senescence & Survival Research Group; Dept. Bioquimica i Biologia Molecular; Institut de Neurociències; Universitat Autònoma de Barcelona; Barcelona; Spain
| | - Sylviane Muller
- Centre National de la Recherche Scientifique (CNRS); Institut de Biologie Moléculaire et Cellulaire; Strasbourg; France
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Silencing of Nuclear Mitotic Apparatus protein (NuMA) accelerates the apoptotic disintegration of the nucleus. Apoptosis 2010; 15:936-45. [PMID: 20467816 DOI: 10.1007/s10495-010-0506-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
One main feature of apoptosis is the sequential degradation of the nuclear structure, including the fragmentation of chromatin and caspase-mediated cleavage of various nuclear proteins. Among these proteins is the Nuclear Mitotic Apparatus protein (NuMA) which plays a specific role in the organization of the mitotic spindle. The exact function of NuMA in the interphase nucleus is unknown, but a number of reports have suggested that it may play a role in chromatin organization and/or gene expression. Here we show that upon cleavage in apoptotic cells, the N-terminal cleavage fragment of NuMA is solubilized while the C-terminal fragment remains associated with the condensed chromatin. Using pancaspase inhibitor z-VAD-fmk and caspase-3 deficient MCF-7 cells, we further show that the solubilization is dependent on caspase-mediated cleavage of NuMA. Finally, the silencing of NuMA by RNAi accelerated nuclear breakdown in apoptotic MCF-7 cells. These results suggest that NuMA may provide structural support in the interphase nucleus by contributing to the organization of chromatin.
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Treacle recruits RNA polymerase I complex to the nucleolus that is independent of UBF. Biochem Biophys Res Commun 2009; 386:396-401. [PMID: 19527688 DOI: 10.1016/j.bbrc.2009.06.050] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Accepted: 06/09/2009] [Indexed: 11/22/2022]
Abstract
Mutations in treacle lead to Treacher Collins syndrome (TCS), an autosomal dominant disorder of craniofacial development. Treacle associates with upstream binding factor (UBF) to regulate rRNA gene (rDNA) transcription, but the precise mechanisms mediated by treacle remain elusive. Here we show that the central repeated domain of treacle binds with RNA polymerase I (Pol I), while that the treacle C-terminus is involved in rDNA promoter recognition and UBF recruitment. Knockdown of treacle resulted in dispersion of Pol I and UBF away from nucleolus, whereas interactions of treacle with Pol I and rDNA promoter were not disrupted by UBF depletion. These findings indicate that treacle, but not UBF, is essential for nucleolar recruitment of Pol I transcription complex. Furthermore, C-terminally truncated treacle, mimicking TCS-associated mutations, failed to target to the nucleolus, possibly causing loss-of-function in the mutant treacle. Our observations support that TCS results from haploinsufficiency of treacle.
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Moss DK, Wilde A, Lane JD. Dynamic release of nuclear RanGTP triggers TPX2-dependent microtubule assembly during the apoptotic execution phase. J Cell Sci 2009; 122:644-55. [PMID: 19208764 DOI: 10.1242/jcs.037259] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
During apoptosis, the interphase microtubule network is dismantled then later replaced by a novel, non-centrosomal microtubule array. These microtubules assist in the peripheral redistribution of nuclear fragments in the apoptotic cell; however, the regulation of apoptotic microtubule assembly is not understood. Here, we demonstrate that microtubule assembly depends upon the release of nuclear RanGTP into the apoptotic cytoplasm because this process is blocked in apoptotic cells overexpressing dominant-negative GDP-locked Ran (T24N). Actin-myosin-II contractility provides the impetus for Ran release and, consequently, microtubule assembly is blocked in blebbistatin- and Y27632-treated apoptotic cells. Importantly, the spindle-assembly factor TPX2 (targeting protein for Xklp2), colocalises with apoptotic microtubules, and siRNA silencing of TPX2, but not of the microtubule motors Mklp1 and Kid, abrogates apoptotic microtubule assembly. These data provide a molecular explanation for the assembly of the apoptotic microtubule network, and suggest important similarities with the process of RanGTP- and TPX2-mediated mitotic spindle formation.
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Affiliation(s)
- David K Moss
- Cell Biology Laboratories, Department of Biochemistry, University of Bristol, School of Medical Sciences, University Walk, Bristol BS8 1TD, UK
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Kim MM, Mendis E, Kim SK. Laurencia okamurai extract containing laurinterol induces apoptosis in melanoma cells. J Med Food 2008; 11:260-6. [PMID: 18598167 DOI: 10.1089/jmf.2007.575] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Laurinterol is a marine sesquiterpene that has been known to have antimicrobial activity. The purpose of this study is to investigate the effect of Laurencia okamurai extract containing laurinterol (LOEL) on induction of apoptosis in melanoma cells (B16F1). Anticancer activity of LOEL against melanoma cells was shown in a dose-dependent manner by the 1-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide assay. It was for the first time found that LOEL exhibited an excellent effect on the induction of apoptosis as determined by DNA fragmentation, terminal deoxynucleotidyl transferase-mediated dUTP in situ nick-end labeling assay, cell cycle analysis, and measurement of activities of several caspases in melanoma cells. It was also demonstrated that transcriptional activation of p53, a tumor suppressor gene, and activation of p21 promoter by LOEL were involved in the induction of apoptosis by reporter gene assay. In particular, western blot analysis confirmed that LOEL above 5 microg/mL significantly increased the expression level of phospho-p53, the active form. These results indicate that LOEL can induce apoptosis through a p53-dependent pathway in melanoma cells.
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Affiliation(s)
- Moon-Moo Kim
- Department of Chemistry, Dong-Eui University, Busan, Republic of Korea
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Kaposi's sarcoma-associated herpesvirus-encoded LANA can interact with the nuclear mitotic apparatus protein to regulate genome maintenance and segregation. J Virol 2008; 82:6734-46. [PMID: 18417561 DOI: 10.1128/jvi.00342-08] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) genomes are tethered to the host chromosomes and partitioned faithfully into daughter cells with the host chromosomes. The latency-associated nuclear antigen (LANA) is important for segregation of the newly synthesized viral genomes to the daughter nuclei. Here, we report that the nuclear mitotic apparatus protein (NuMA) and LANA can associate in KSHV-infected cells. In synchronized cells, NuMA and LANA are colocalized in interphase cells and separate during mitosis at the beginning of prophase, reassociating again at the end of telophase and cytokinesis. Silencing of NuMA expression by small interfering RNA and expression of LGN and a dominant-negative of dynactin (P150-CC1), which disrupts the association of NuMA with microtubules, resulted in the loss of KSHV terminal-repeat plasmids containing the major latent origin. Thus, NuMA is required for persistence of the KSHV episomes in daughter cells. This interaction between NuMA and LANA is critical for segregation and maintenance of the KSHV episomes through a temporally controlled mechanism of binding and release during specific phases of mitosis.
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Guo X, Guo Y. Effect of baicalin on mitochondrial membrane potential, Ca 2+ and cytochrome C in HCC cell line BEL-7402. Shijie Huaren Xiaohua Zazhi 2008; 16:468-472. [DOI: 10.11569/wcjd.v16.i5.468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the effect of mitochondria membrane injury on baicalin-induced liver cancer cell apoptosis and its possible mechanism.
METHODS: Hepatocellular carcinoma (HCC) BEL-7402 cells were cultured. Changes in mitochondria ultra-structure were observed under transmission electron microscope. Changes in mitochondria membrane potential, intracellular Ca2+ and apoptosis rate were detected by flow cytometry. Cytochrome C level was detected using fluorescence method. Expression of protein bcl-2 and activity of capases-3 were assessed by flow cytometry.
RESULTS: Baicalin induced BEL-7402 cell apoptosis in a dose-dependent manner and significantly changed the ultra-structure of mitochondria. The level of mitochondria membrane potential was significantly decreased (85.49 ± 2.17, 82.59 ± 2.18, 28.45 ± 2.39, respectively, at 6, 24 and 48 h). The release of intracellular Ca2+ and cytochrome C was increased, while the expression of Bcl-2 was decreased and the activity of caspase-3 was increased. The values for mitochondria membrane potential, intracellular Ca2+ and cytochrome C were 19.56 ± 2.09, 14.76 ± 1.03 and 88.79 ± 4.32 at 6 h; 82.59 ± 2.1, 14.76 ± 1.03 and 44.57 ± 5.56 at 24 h; 28.45 ± 2.39, 88.79 ± 4.32 and 78.63 ± 7.65 at 48 h.
CONCLUSION: Baicalin induces apoptosis of HCC BEL-7402 cells in a dose- dependent manner and mitochondria play an important role in apoptosis by inhibiting Bcl-2 protein expression in liver cancer cells, increasing the activity of caspase-3 and the level of intracellular Ca2+, promoting mitochondrial membrane permeability and cytochrome C release, decreasing mitochondrial transmembrane potential.
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Tsai YT, Lin CI, Chen HK, Lee KM, Hsu CY, Yang SJ, Yeh NH. Chromatin tethering effects of hNopp140 are involved in the spatial organization of nucleolus and the rRNA gene transcription. J Biomed Sci 2008; 15:471-86. [PMID: 18253863 PMCID: PMC2440943 DOI: 10.1007/s11373-007-9226-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2007] [Accepted: 11/23/2007] [Indexed: 11/29/2022] Open
Abstract
The short arms of five human acrocentric chromosomes contain ribosomal gene (rDNA) clusters where numerous mini-nucleoli arise at the exit of mitosis. These small nucleoli tend to coalesce into one or a few large nucleoli during interphase by unknown mechanisms. Here, we demonstrate that the N- and C-terminal domains of a nucleolar protein, hNopp140, bound respectively to alpha-satellite arrays and rDNA clusters of acrocentric chromosomes for nucleolar formation. The central acidic-and-basic repeated domain of hNopp140, possessing a weak self-self interacting ability, was indispensable for hNopp140 to build up a nucleolar round-shaped structure. The N- or the C-terminally truncated hNopp140 caused nucleolar segregation and was able to alter locations of the rDNA transcription, as mediated by detaching the rDNA repeats from the acrocentric alpha-satellite arrays. Interestingly, an hNopp140 mutant, made by joining the N- and C-terminal domains but excluding the entire central repeated region, induced nucleolar disruption and global chromatin condensation. Furthermore, RNAi knockdown of hNopp140 resulted in dispersion of the rDNA and acrocentric alpha-satellite sequences away from nucleolus that was accompanied by rDNA transcriptional silence. Our findings indicate that hNopp140, a scaffold protein, is involved in the nucleolar assembly, fusion, and maintenance.
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Affiliation(s)
- Yi-Tzang Tsai
- School of Life Science, Institute of Microbiology and Immunology, National Yang-Ming University, 155 Li-Nong Street Sec. 2, Taipei, 112, Taiwan
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The Vignette for V14 N5 Issue. J Biomed Sci 2007. [DOI: 10.1007/s11373-007-9195-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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