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Launay N, Ruiz M, Planas-Serra L, Verdura E, Rodríguez-Palmero A, Schlüter A, Goicoechea L, Guilera C, Casas J, Campelo F, Jouanguy E, Casanova JL, Boespflug-Tanguy O, Vazquez Cancela M, Gutiérrez-Solana LG, Casasnovas C, Area-Gomez E, Pujol A. RINT1 deficiency disrupts lipid metabolism and underlies a complex hereditary spastic paraplegia. J Clin Invest 2023; 133:e162836. [PMID: 37463447 DOI: 10.1172/jci162836] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 05/26/2023] [Indexed: 07/20/2023] Open
Abstract
The Rad50 interacting protein 1 (Rint1) is a key player in vesicular trafficking between the ER and Golgi apparatus. Biallelic variants in RINT1 cause infantile-onset episodic acute liver failure (ALF). Here, we describe 3 individuals from 2 unrelated families with novel biallelic RINT1 loss-of-function variants who presented with early onset spastic paraplegia, ataxia, optic nerve hypoplasia, and dysmorphic features, broadening the previously described phenotype. Our functional and lipidomic analyses provided evidence that pathogenic RINT1 variants induce defective lipid-droplet biogenesis and profound lipid abnormalities in fibroblasts and plasma that impact both neutral lipid and phospholipid metabolism, including decreased triglycerides and diglycerides, phosphatidylcholine/phosphatidylserine ratios, and inhibited Lands cycle. Further, RINT1 mutations induced intracellular ROS production and reduced ATP synthesis, affecting mitochondria with membrane depolarization, aberrant cristae ultrastructure, and increased fission. Altogether, our results highlighted the pivotal role of RINT1 in lipid metabolism and mitochondria function, with a profound effect in central nervous system development.
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Affiliation(s)
- Nathalie Launay
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Montserrat Ruiz
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Laura Planas-Serra
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Edgard Verdura
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Agustí Rodríguez-Palmero
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- Pediatric Neurology unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Spain
| | - Agatha Schlüter
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Leire Goicoechea
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Cristina Guilera
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Josefina Casas
- Research Unit on BioActive Molecules (RUBAM), Departament de Química Biomèdica, Institut de Química Avançada de Catalunya (IQAC-CSIC), Barcelona, Spain
- CIBEREHD, Centro de Investigación Biomédica en Red de Enfermedades heoaticas y digestivas, ISCIII, Madrid, Spain
| | - Felix Campelo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain
| | - Emmanuelle Jouanguy
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale, UMR 1163, Necker Hospital for Sick Children, Paris, France
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, New York, USA
| | - Jean-Laurent Casanova
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale, UMR 1163, Necker Hospital for Sick Children, Paris, France
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, New York, USA
- Pediatric Hematology-Immunology Unit, Necker Hospital for Sick Children, Paris, France
- Howard Hughes Medical Institute, New York, New York, USA
| | - Odile Boespflug-Tanguy
- CRMR Leukofrance Service de Neuropédiatrie, Hôpital Robert Debré AP-HP, Paris, France
- UMR1141 Neurodiderot Université de Paris Cité, Paris, France
| | | | - Luis González Gutiérrez-Solana
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
- Consulta de Neurodegenerativas, Sección de Neurología Pediátrica, Hospital, Infantil Universitario Niño Jesús, Madrid, Spain
| | - Carlos Casasnovas
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
- Neuromuscular Unit, Neurology Department, Hospital Universitari de Bellvitge, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Estela Area-Gomez
- Department of Neurology, Columbia University, New York, New York, USA
| | - Aurora Pujol
- Neurometabolic Diseases Laboratory, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
- Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain
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Lara-Barba E, Torán-Vilarrubias A, Moriel-Carretero M. An Expansion of the Endoplasmic Reticulum that Halts Autophagy is Permissive to Genome Instability. CONTACT (THOUSAND OAKS (VENTURA COUNTY, CALIF.)) 2023; 6:25152564231157706. [PMID: 37366415 PMCID: PMC10243512 DOI: 10.1177/25152564231157706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/27/2023] [Accepted: 01/27/2023] [Indexed: 06/28/2023]
Abstract
The links between autophagy and genome stability, and whether they are important for lifespan and health, are not fully understood. We undertook a study to explore this notion at the molecular level using Saccharomyces cerevisiae. On the one hand, we triggered autophagy using rapamycin, to which we exposed mutants defective in preserving genome integrity, then assessed their viability, their ability to induce autophagy and the link between these two parameters. On the other hand, we searched for molecules derived from plant extracts known to have powerful benefits on human health to try to rescue the negative effects rapamycin had against some of these mutants. We uncover that autophagy execution is lethal for mutants unable to repair DNA double strand breaks, while the extract from Silybum marianum seeds induces an expansion of the endoplasmic reticulum (ER) that blocks autophagy and protects them. Our data uncover a connection between genome integrity and homeostasis of the ER whereby ER stress-like scenarios render cells tolerant to sub-optimal genome integrity conditions.
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Affiliation(s)
- Eliana Lara-Barba
- Institut de Génétique Humaine (IGH), Université de Montpellier-Centre National de la Recherche Scientifique,
Montpellier, France
| | - Alba Torán-Vilarrubias
- Institut de Génétique Humaine (IGH), Université de Montpellier-Centre National de la Recherche Scientifique,
Montpellier, France
| | - María Moriel-Carretero
- Centre de Recherche en Biologie cellulaire de
Montpellier (CRBM), Université de Montpellier-Centre National de la Recherche Scientifique,
Montpellier, France
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3
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Arnold F, Gout J, Wiese H, Weissinger SE, Roger E, Perkhofer L, Walter K, Scheible J, Prelli Bozzo C, Lechel A, Ettrich TJ, Azoitei N, Hao L, Fürstberger A, Kaminska EK, Sparrer KMJ, Rasche V, Wiese S, Kestler HA, Möller P, Seufferlein T, Frappart PO, Kleger A. RINT1 Regulates SUMOylation and the DNA Damage Response to Preserve Cellular Homeostasis in Pancreatic Cancer. Cancer Res 2021; 81:1758-1774. [PMID: 33531371 DOI: 10.1158/0008-5472.can-20-2633] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 12/14/2020] [Accepted: 01/28/2021] [Indexed: 11/16/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) still presents with a dismal prognosis despite intense research. Better understanding of cellular homeostasis could identify druggable targets to improve therapy. Here we propose RAD50-interacting protein 1 (RINT1) as an essential mediator of cellular homeostasis in PDAC. In a cohort of resected PDAC, low RINT1 protein expression correlated significantly with better survival. Accordingly, RINT1 depletion caused severe growth defects in vitro associated with accumulation of DNA double-strand breaks (DSB), G2 cell cycle arrest, disruption of Golgi-endoplasmic reticulum homeostasis, and cell death. Time-resolved transcriptomics corroborated by quantitative proteome and interactome analyses pointed toward defective SUMOylation after RINT1 loss, impairing nucleocytoplasmic transport and DSB response. Subcutaneous xenografts confirmed tumor response by RINT1 depletion, also resulting in a survival benefit when transferred to an orthotopic model. Primary human PDAC organoids licensed RINT1 relevance for cell viability. Taken together, our data indicate that RINT1 loss affects PDAC cell fate by disturbing SUMOylation pathways. Therefore, a RINT1 interference strategy may represent a new putative therapeutic approach. SIGNIFICANCE: These findings provide new insights into the aggressive behavior of PDAC, showing that RINT1 directly correlates with survival in patients with PDAC by disturbing the SUMOylation process, a crucial modification in carcinogenesis.
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Affiliation(s)
- Frank Arnold
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Johann Gout
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Heike Wiese
- Core Unit Mass Spectrometry and Proteomics, Medical Faculty, Ulm University, Ulm, Germany
| | | | - Elodie Roger
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Lukas Perkhofer
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Karolin Walter
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Jeanette Scheible
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | | | - André Lechel
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Thomas J Ettrich
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Ninel Azoitei
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | - Li Hao
- Center for Translational Imaging (MoMAN), Ulm University, Ulm, Germany
| | - Axel Fürstberger
- Institute of Medical Systems Biology, Ulm University, Ulm, Germany
| | - Ewa K Kaminska
- Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | - Volker Rasche
- Center for Translational Imaging (MoMAN), Ulm University, Ulm, Germany
| | - Sebastian Wiese
- Core Unit Mass Spectrometry and Proteomics, Medical Faculty, Ulm University, Ulm, Germany
| | - Hans A Kestler
- Institute of Medical Systems Biology, Ulm University, Ulm, Germany
| | - Peter Möller
- Institute of Pathology, University Medical Centre Ulm, Ulm, Germany
| | - Thomas Seufferlein
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany
| | | | - Alexander Kleger
- Department of Internal Medicine I, University Medical Centre Ulm, Ulm, Germany.
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4
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Gaurav S, Ranjan R, Kuldeep J, Dhiman K, Mahapatra PP, Ashish, Siddiqi MI, Ahmed S. The N-terminus region of Drp1, a Rint1 family protein is essential for cell survival and its interaction with Rad50 protein in fission yeast S.pombe. Biochim Biophys Acta Gen Subj 2020; 1865:129739. [PMID: 32956753 DOI: 10.1016/j.bbagen.2020.129739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Defects in DNA repair pathway can lead to double-strand breaks leading to genomic instability. Earlier we have shown that S.pombe Drp1, a Rint1/Tip1 family protein is required for the recovery from DNA damage. METHODS Various truncations of Drp1 protein were constructed and their role in DNA damage response and interaction with Rad50 protein has been studied by co-immunoprecipitation and pull-down assays. RESULTS The structural and functional analysis of Drp1 protein revealed that the N-terminus region of Drp1 is indispensable for the survival. The C-terminus truncation mutants, drp1C1Δ and drp1C2Δ exhibit temperature sensitive phenotype and are hypersensitive against DNA damaging agents with elevated level of Rad52-YFP foci at non-permissive temperature indicating the impairment for DNA damage repair pathway. The essential N-terminus region of Drp1 interacts with the C-terminus region of Rad50 and might be involved in influencing the MRN/X function. Small-angle X-ray (SAXS) analysis revealed three-domain like shapes in Drp1 protein while the C-terminus region of Rad50 exhibit unusual bulges. Computational docking studies revealed the amino acid residues at the C-terminus region of Rad50 that are involved in the interaction with the residues present at the N-terminal region of Drp1 indicating the importance of the N-terminal region of Drp1 protein. CONCLUSIONS We have identified the region of Drp1 and Rad50 proteins that are involved in the interaction and their role in the DNA damage response pathway has been analyzed. GENERAL SIGNIFICANCE The functional and structural aspects of fission yeast Drp1 protein and its interaction with Rad50 have been elucidated.
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Affiliation(s)
- Sachin Gaurav
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Rajeev Ranjan
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Jitendra Kuldeep
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Kanika Dhiman
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Pinaki Prasad Mahapatra
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Ashish
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Mohammad Imran Siddiqi
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Shakil Ahmed
- Molecular and Structural Biology Division, CSIR- Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India.
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5
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Gomes AL, Matos-Rodrigues GE, Frappart PO, Martins RAP. RINT1 Loss Impairs Retinogenesis Through TRP53-Mediated Apoptosis. Front Cell Dev Biol 2020; 8:711. [PMID: 32850831 PMCID: PMC7406574 DOI: 10.3389/fcell.2020.00711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/13/2020] [Indexed: 01/22/2023] Open
Abstract
Genomic instability in the central nervous system (CNS) is associated with defective neurodevelopment and neurodegeneration. Congenital human syndromes that affect the CNS development originate from mutations in genes of the DNA damage response (DDR) pathways. RINT1 (Rad50-interacting protein 1) is a partner of RAD50, that participates in the cellular responses to DNA double-strand breaks (DSB). Recently, we showed that Rint1 regulates cell survival in the developing brain and its loss led to premature lethality associated with genomic stability. To bypass the lethality of Rint1 inactivation in the embryonic brain and better understand the roles of RINT1 in CNS development, we conditionally inactivated Rint1 in retinal progenitor cells (RPCs) during embryogenesis. Rint1 loss led to accumulation of endogenous DNA damage, but RINT1 was not necessary for the cell cycle checkpoint activation in these neural progenitor cells. As a consequence, proliferating progenitors and postmitotic neurons underwent apoptosis causing defective neurogenesis of retinal ganglion cells, malformation of the optic nerve and blindness. Notably, inactivation of Trp53 prevented apoptosis of the RPCs and rescued the generation of retinal neurons and vision loss. Together, these results revealed an essential role for TRP53-mediated apoptosis in the malformations of the visual system caused by RINT1 loss and suggests that defective responses to DNA damage drive retinal malformations.
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Affiliation(s)
- Anielle L Gomes
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gabriel E Matos-Rodrigues
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pierre-Olivier Frappart
- Institute of Toxicology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Rodrigo A P Martins
- Programa de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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6
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Angeli D, Salvi S, Tedaldi G. Genetic Predisposition to Breast and Ovarian Cancers: How Many and Which Genes to Test? Int J Mol Sci 2020; 21:E1128. [PMID: 32046255 PMCID: PMC7038038 DOI: 10.3390/ijms21031128] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/03/2020] [Accepted: 02/05/2020] [Indexed: 12/19/2022] Open
Abstract
Breast and ovarian cancers are some of the most common tumors in females, and the genetic predisposition is emerging as one of the key risk factors in the development of these two malignancies. BRCA1 and BRCA2 are the best-known genes associated with hereditary breast and ovarian cancer. However, recent advances in molecular techniques, Next-Generation Sequencing in particular, have led to the identification of many new genes involved in the predisposition to breast and/or ovarian cancer, with different penetrance estimates. TP53, PTEN, STK11, and CDH1 have been identified as high penetrance genes for the risk of breast/ovarian cancers. Besides them, PALB2, BRIP1, ATM, CHEK2, BARD1, NBN, NF1, RAD51C, RAD51D and mismatch repair genes have been recognized as moderate and low penetrance genes, along with other genes encoding proteins involved in the same pathways, possibly associated with breast/ovarian cancer risk. In this review, we summarize the past and more recent findings in the field of cancer predisposition genes, with insights into the role of the encoded proteins and the associated genetic disorders. Furthermore, we discuss the possible clinical utility of genetic testing in terms of prevention protocols and therapeutic approaches.
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Affiliation(s)
- Davide Angeli
- Biostatistics and Clinical Trials Unit, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola, Italy;
| | - Samanta Salvi
- Biosciences Laboratory, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola, Italy;
| | - Gianluca Tedaldi
- Biosciences Laboratory, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola, Italy;
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7
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Song H, Ma J, Bian Z, Chen S, Zhu J, Wang J, Huang N, Yin M, Sun F, Xu M, Pan Q. Global profiling of O-GlcNAcylated and/or phosphorylated proteins in hepatoblastoma. Signal Transduct Target Ther 2019; 4:40. [PMID: 31637018 PMCID: PMC6799812 DOI: 10.1038/s41392-019-0067-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 05/28/2019] [Accepted: 06/27/2019] [Indexed: 12/12/2022] Open
Abstract
O-linked-β-N-acetylglucosamine (O-GlcNAc) glycosylation (O-GlcNAcylation) and phosphorylation are critical posttranslational modifications that are involved in regulating the functions of proteins involved in tumorigenesis and the development of various solid tumors. However, a detailed characterization of the patterns of these modifications at the peptide or protein level in hepatoblastoma (HB), a highly malignant primary hepatic tumor with an extremely low incidence in children, has not been performed. Here, we examined O-GlcNAc-modified or phospho-modified peptides and proteins in HB through quantitative proteomic analysis of HB tissues and paired normal liver tissues. Our results identified 114 O-GlcNAcylated peptides belonging to 78 proteins and 3494 phosphorylated peptides in 2088 proteins. Interestingly, 41 proteins were modified by both O-GlcNAcylation and phosphorylation. These proteins are involved in multiple molecular and cellular processes, including chromatin remodeling, transcription, translation, transportation, and organelle organization. In addition, we verified the accuracy of the proteomics results and found a competitive inhibitory effect between O-GlcNAcylation and phosphorylation of HSPB1. Further, O-GlcNAcylation modification of HSPB1 promoted proliferation and enhanced the chemotherapeutic resistance of HB cell lines in vitro. Collectively, our research suggests that O-GlcNAc-modified and/or phospho-modified proteins may play a crucial role in the pathogenesis of HB.
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Affiliation(s)
- Hang Song
- Department of Laboratory Medicine, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Ji Ma
- Department of Laboratory Medicine, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Zhixuan Bian
- Department of Laboratory Medicine, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Shuhua Chen
- Department of Laboratory Medicine, Yunfu People’s Hospital, 527300 Guangdong, China
| | - Jiabei Zhu
- Department of Laboratory Medicine, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Jing Wang
- Department of Surgery, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Nan Huang
- Department of Laboratory Medicine, Shanghai Tenth People’s Hospital of Tongji University, 200072 Shanghai, China
| | - Minzhi Yin
- Department of Pathology, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Fenyong Sun
- Department of Laboratory Medicine, Shanghai Tenth People’s Hospital of Tongji University, 200072 Shanghai, China
| | - Min Xu
- Department of Surgery, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
| | - Qiuhui Pan
- Department of Laboratory Medicine, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiaotong University, 200127 Shanghai, China
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8
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Cousin MA, Conboy E, Wang JS, Lenz D, Schwab TL, Williams M, Abraham RS, Barnett S, El-Youssef M, Graham RP, Gutierrez Sanchez LH, Hasadsri L, Hoffmann GF, Hull NC, Kopajtich R, Kovacs-Nagy R, Li JQ, Marx-Berger D, McLin V, McNiven MA, Mounajjed T, Prokisch H, Rymen D, Schulze RJ, Staufner C, Yang Y, Clark KJ, Lanpher BC, Klee EW. RINT1 Bi-allelic Variations Cause Infantile-Onset Recurrent Acute Liver Failure and Skeletal Abnormalities. Am J Hum Genet 2019; 105:108-121. [PMID: 31204009 DOI: 10.1016/j.ajhg.2019.05.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 05/13/2019] [Indexed: 01/12/2023] Open
Abstract
Pediatric acute liver failure (ALF) is life threatening with genetic, immunologic, and environmental etiologies. Approximately half of all cases remain unexplained. Recurrent ALF (RALF) in infants describes repeated episodes of severe liver injury with recovery of hepatic function between crises. We describe bi-allelic RINT1 alterations as the cause of a multisystem disorder including RALF and skeletal abnormalities. Three unrelated individuals with RALF onset ≤3 years of age have splice alterations at the same position (c.1333+1G>A or G>T) in trans with a missense (p.Ala368Thr or p.Leu370Pro) or in-frame deletion (p.Val618_Lys619del) in RINT1. ALF episodes are concomitant with fever/infection and not all individuals have complete normalization of liver function testing between episodes. Liver biopsies revealed nonspecific liver damage including fibrosis, steatosis, or mild increases in Kupffer cells. Skeletal imaging revealed abnormalities affecting the vertebrae and pelvis. Dermal fibroblasts showed splice-variant mediated skipping of exon 9 leading to an out-of-frame product and nonsense-mediated transcript decay. Fibroblasts also revealed decreased RINT1 protein, abnormal Golgi morphology, and impaired autophagic flux compared to control. RINT1 interacts with NBAS, recently implicated in RALF, and UVRAG, to facilitate Golgi-to-ER retrograde vesicle transport. During nutrient depletion or infection, Golgi-to-ER transport is suppressed and autophagy is promoted through UVRAG regulation by mTOR. Aberrant autophagy has been associated with the development of similar skeletal abnormalities and also with liver disease, suggesting that disruption of these RINT1 functions may explain the liver and skeletal findings. Clarifying the pathomechanism underlying this gene-disease relationship may inform therapeutic opportunities.
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9
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Mukhopadhyay P, Seelan RS, Greene RM, Pisano MM. Impact of prenatal arsenate exposure on gene expression in a pure population of migratory cranial neural crest cells. Reprod Toxicol 2019; 86:76-85. [PMID: 30953684 DOI: 10.1016/j.reprotox.2019.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 11/27/2022]
Abstract
Prenatal exposure to arsenic, a naturally occurring toxic element, causes neural tube defects (NTDs) and, in animal models, orofacial anomalies. Since aberrant development or migration of cranial neural crest cells (CNCCs) can also cause similar anomalies within developing embryos, we examined the effects of in utero exposure to sodium arsenate on gene expression patterns in pure populations of CNCCs, isolated by fluorescence activated cell sorting (FACS), from Cre/LoxP reporter mice. Changes in gene expression were analyzed using Affymetrix GeneChip® microarrays and expression of selected genes was verified by TaqMan quantitative real-time PCR. We report, for the first time, arsenate-induced alterations in the expression of a number of novel candidate genes and canonical cascades that may contribute to the pathogenesis of orofacial defects. Ingenuity Pathway and NIH-DAVID analyses revealed cellular response pathways, biological themes, and potential upstream regulators, that may underlie altered fetal programming of arsenate exposed CNCCs.
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Affiliation(s)
- Partha Mukhopadhyay
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States
| | - Ratnam S Seelan
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States
| | - Robert M Greene
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States.
| | - M Michele Pisano
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States
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Zhao X, Guo X, Tang X, Zhang H, Wang M, Kong Y, Zhang X, Zhao Z, Lv M, Li L. Misregulation of ER-Golgi Vesicle Transport Induces ER Stress and Affects Seed Vigor and Stress Response. FRONTIERS IN PLANT SCIENCE 2018; 9:658. [PMID: 29868102 PMCID: PMC5968616 DOI: 10.3389/fpls.2018.00658] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 04/30/2018] [Indexed: 05/20/2023]
Abstract
Seeds of higher plants accumulate numerous storage proteins to use as nitrogen resources for early plant development. Seed storage proteins (SSPs) are synthesized as large precursors on the rough endoplasmic reticulum (rER), and are delivered to protein storage vacuoles (PSVs) via vesicle transport, where they are processed to mature forms. We previously identified an Arabidopsis ER-localized tethering complex, MAG2 complex, which might be involved in Golgi to ER retrograde transport. The MAG2 complex is composed of 4 subunits, MAG2, MIP1, MIP2, and MIP3. Mutants with defective alleles for these subunits accumulated SSP precursors inside the ER lumen. Here, we report that the mag2-1 mip3-1 and mip2-1 mip3-1 double mutant have more serious vesicle transport defects than the mag2-1, mip2-1, and mip3-1 single mutants, since they accumulate more SSP precursors than the corresponding single mutants, and ER stress is more severe than the single mutants. The mag2-1 mip3-1 and mip2-1 mip3-1 double mutants show growth and developmental defects rather than the single mutants. Both single and double mutant seeds are found to have lower protein content and decreased germinating vigor than wild type seeds. All the mutants are sensitive to abscisic acid (ABA) and salt stress, and exhibit alteration in ABA signaling pathway. Our study clarified that ER-Golgi vesicle transport affects seed vigor through controlling seed protein quality and content, as well as plant response to environmental stress via influencing ABA signaling pathway.
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Affiliation(s)
- Xiaonan Zhao
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Xiufen Guo
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Xiaofei Tang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
- Institute of Soybean Research, Heilongjiang Provincial Academy of Agricultural Sciences, Harbin, China
| | - Hailong Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Mingjing Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Yun Kong
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Xiaomeng Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Zhenjie Zhao
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Min Lv
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
| | - Lixin Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, China
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11
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Otterpohl KL, Gould KA. Evaluation of Rint1 as a modifier of intestinal tumorigenesis and cancer risk. PLoS One 2017; 12:e0172247. [PMID: 28264000 PMCID: PMC5339343 DOI: 10.1371/journal.pone.0172247] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 02/01/2017] [Indexed: 11/18/2022] Open
Abstract
The Rad50 Interacting Protein 1 (Rint1) influences cellular homeostasis through maintenance of endoplasmic reticulum, Golgi and centrosome integrity and regulation of vesicle transport, autophagy and the G2/M checkpoint. Rint1 has been postulated to function as a tumor suppressor as well as an oncogene, with its role depending perhaps upon the precise cellular and/or experimental context. In humans, heterozygosity for germline missense variants in RINT1 have, in some studies, been associated with increased risk of both breast and Lynch syndrome type cancers. However, it is not known if these germline variants represent loss of function alleles or gain of function alleles. Based upon these findings, as well as our initial consideration of Rint1 as a potential candidate for Mom5, a genetic modifier of intestinal tumorigenesis in ApcMin/+ mice, we sought to explicitly examine the impact of Rint1 on tumorigenesis in ApcMin/+ mice. However, heterozygosity for a knockout of Rint1 had no impact on tumorigenesis in Rint1+/-; ApcMin/+ mice. Likewise, we found no evidence to suggest that the remaining Rint1 allele was lost somatically in intestinal tumors in ApcMin/+ mice. Interestingly, in contrast to what has been observed in Rint1+/- mice on a mixed genetic background, Rint1+/- mice on a pure C57BL/6J background did not show spontaneous tumor development. We also evaluated colorectal cancer data available in the COSMIC and ONCOMINE databases and found that RINT1 overexpression, as well as the presence of somatic missense mutations in RINT1 were associated with colorectal cancer development. In vitro evaluation of two missense variants in RINT1 suggested that such variants do have the potential to impact RINT1 function.
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Affiliation(s)
- Karla L. Otterpohl
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Karen A. Gould
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
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12
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Association of Human Papillomavirus 16 E2 with Rad50-Interacting Protein 1 Enhances Viral DNA Replication. J Virol 2017; 91:JVI.02305-16. [PMID: 28031358 PMCID: PMC5309968 DOI: 10.1128/jvi.02305-16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 12/15/2016] [Indexed: 12/19/2022] Open
Abstract
Rad50-interacting protein 1 (Rint1) associates with the DNA damage response protein Rad50 during the transition from the S phase to the G2/M phase and functions in radiation-induced G2 checkpoint control. It has also been demonstrated that Rint1 is essential in vesicle trafficking from the Golgi apparatus to the endoplasmic reticulum (ER) through an interaction with Zeste-White 10 (ZW10). We have isolated a novel interaction between Rint1 and the human papillomavirus 16 (HPV16) transcription and replication factor E2. E2 binds to Rint1 within its ZW10 interaction domain, and we show that in the absence of E2, Rint1 is localized to the ER and associates with ZW10. E2 expression results in a disruption of the Rint1-ZW10 interaction and an accumulation of nuclear Rint1, coincident with a significant reduction in vesicle movement from the ER to the Golgi apparatus. Interestingly, nuclear Rint1 and members of the Mre11/Rad50/Nbs1 (MRN) complex were found in distinct E2 nuclear foci, which peaked during mid-S phase, indicating that the recruitment of Rint1 to E2 foci within the nucleus may also result in the recruitment of this DNA damage-sensing protein complex. We show that exogenous Rint1 expression enhances E2-dependent virus replication. Conversely, the overexpression of a truncated Rint1 protein that retains the E2 binding domain but not the Rad50 binding domain acts as a dominant negative inhibitor of E2-dependent HPV replication. Put together, these experiments demonstrate that the interaction between Rint1 and E2 has an important function in HPV replication. IMPORTANCE HPV infections are an important driver of many epithelial cancers, including those within the anogenital and oropharyngeal tracts. The HPV life cycle is tightly regulated and intimately linked to the differentiation of the epithelial cells that it infects. HPV replication factories formed in the nucleus are locations where viral DNA is copied to support virus persistence and amplification of infection. The recruitment of specific cellular protein complexes to these factories aids efficient and controlled viral replication. We have identified a novel HPV-host interaction that functions in the cellular response to DNA damage and cell cycle control. We show that the HPV E2 protein targets Rad50-interacting protein 1 (Rint1) to facilitate virus genome replication. These findings add to our understanding of how HPV replicates and the host cell pathways that are targeted by HPV to support virus replication. Understanding these pathways will allow further research into novel inhibitors of HPV genome replication.
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Terradas M, Martín M, Repullès J, Huarte M, Genescà A. Distinct Sets of lncRNAs are Differentially Modulated after Exposure to High and Low Doses of X Rays. Radiat Res 2016; 186:549-558. [PMID: 27841703 DOI: 10.1667/rr14377.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
High- and low-dose X rays are used in medicine as therapeutic and diagnostic tools, respectively. While the cellular response to high-dose radiation is well known, studies on the effects of low-dose radiation and its ability to trigger a proper DNA damage response have had contradictory results. The functions of many signaling and effector proteins of the DNA damage response (DDR) have been described, and are attributed to well-known DDR pathways. However, there has been little known about the contribution of long noncoding RNAs (lncRNAs) to DDR, although there is recent evidence that lncRNAs may be associated with almost all biological functions, including DDR. In this work, we investigated the participation of lncRNAs in the response to different X-ray doses. By microarray analysis, we observed that in human breast epithelial cells, distinct sets of coding and noncoding transcripts are differentially regulated after moderate- and high-dose irradiation compared to those regulated after low-dose irradiation. While the modulated coding and noncoding genes at low doses relate to cell signaling pathways, those affected by moderate and high doses are mostly enriched for cell cycle regulation and apoptotic pathways. Quantification using qPCR of the lncRNAs identified by microarrays allowed the validation of 75% of those regulated at the higher doses. These results indicate that lncRNA expression is regulated by ionizing radiation and that this expression is dose dependent.
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Affiliation(s)
- Mariona Terradas
- a Departament de Biologia Cel·lular, Fisiologia i d'Immunologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Marta Martín
- a Departament de Biologia Cel·lular, Fisiologia i d'Immunologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Joan Repullès
- a Departament de Biologia Cel·lular, Fisiologia i d'Immunologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Maite Huarte
- b Center for Applied Medical Research, University of Navarra, 31008 Pamplona, Spain
| | - Anna Genescà
- a Departament de Biologia Cel·lular, Fisiologia i d'Immunologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
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Li N, Thompson ER, Rowley SM, McInerny S, Devereux L, Goode D, Investigators L, Wong-Brown MW, Scott RJ, Trainer AH, Gorringe KL, James PA, Campbell IG. Reevaluation of RINT1 as a breast cancer predisposition gene. Breast Cancer Res Treat 2016; 159:385-92. [DOI: 10.1007/s10549-016-3944-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 08/10/2016] [Indexed: 12/30/2022]
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15
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Yang CP, Kuo YL, Lee YC, Lee KH, Chiang CW, Wang JM, Hsu CC, Chang WC, Lin DY. RINT-1 interacts with MSP58 within nucleoli and plays a role in ribosomal gene transcription. Biochem Biophys Res Commun 2016; 478:873-80. [PMID: 27530925 DOI: 10.1016/j.bbrc.2016.08.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 08/07/2016] [Indexed: 11/27/2022]
Abstract
The nucleolus is the cellular site of ribosomal (r)DNA transcription and ribosome biogenesis. The 58-kDa microspherule protein (MSP58) is a nucleolar protein involved in rDNA transcription and cell proliferation. However, regulation of MSP58-mediated rDNA transcription remains unknown. Using a yeast two-hybrid system with MSP58 as bait, we isolated complementary (c)DNA encoding Rad50-interacting protein 1 (RINT-1), as a MSP58-binding protein. RINT-1 was implicated in the cell cycle checkpoint, membrane trafficking, Golgi apparatus and centrosome dynamic integrity, and telomere length control. Both in vitro and in vivo interaction assays showed that MSP58 directly interacts with RINT-1. Interestingly, microscopic studies revealed the co-localization of MSP58, RINT-1, and the upstream binding factor (UBF), a rRNA transcription factor, in the nucleolus. We showed that ectopic expression of MSP58 or RINT-1 resulted in decreased rRNA expression and rDNA promoter activity, whereas knockdown of MSP58 or RINT-1 by siRNA exerted the opposite effect. Coexpression of MSP58 and RINT-1 robustly decreased rRNA synthesis compared to overexpression of either protein alone, whereas depletion of RINT-1 from MSP58-transfected cells enhanced rRNA synthesis. We also found that MSP58, RINT-1, and the UBF were associated with the rDNA promoter using a chromatin immunoprecipitation assay. Because aberrant ribosome biogenesis contributes to neoplastic transformation, our results revealed a novel protein complex involved in the regulation of rRNA gene expression, suggesting a role for MSP58 and RINT-1 in cancer development.
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Affiliation(s)
- Chuan-Pin Yang
- Institute of Bioinformatics and Biosignal Transduction, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Yu-Liang Kuo
- Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung, 40201, Taiwan, ROC; Department of Medical Imaging, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, ROC
| | - Yi-Chao Lee
- Graduate Institute of Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan, ROC
| | - Kuen-Haur Lee
- Institute for Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan, ROC
| | - Chi-Wu Chiang
- Infectious Diseases and Signaling Research Center, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Ju-Ming Wang
- Institute of Bioinformatics and Biosignal Transduction, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Infectious Diseases and Signaling Research Center, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Che-Chia Hsu
- Institute of Bioinformatics and Biosignal Transduction, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Wen-Chang Chang
- Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Infectious Diseases and Signaling Research Center, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, 11031, Taiwan, ROC; Center for Neurotrauma and Neuroregeneration, Taipei Medical University, Taipei, 11031, Taiwan, ROC.
| | - Ding-Yen Lin
- Institute of Bioinformatics and Biosignal Transduction, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Infectious Diseases and Signaling Research Center, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; Institute for Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan, ROC.
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16
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Rint1 inactivation triggers genomic instability, ER stress and autophagy inhibition in the brain. Cell Death Differ 2015; 23:454-68. [PMID: 26383973 DOI: 10.1038/cdd.2015.113] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 06/30/2015] [Accepted: 07/08/2015] [Indexed: 11/08/2022] Open
Abstract
Endoplasmic reticulum (ER) stress, defective autophagy and genomic instability in the central nervous system are often associated with severe developmental defects and neurodegeneration. Here, we reveal the role played by Rint1 in these different biological pathways to ensure normal development of the central nervous system and to prevent neurodegeneration. We found that inactivation of Rint1 in neuroprogenitors led to death at birth. Depletion of Rint1 caused genomic instability due to chromosome fusion in dividing cells. Furthermore, Rint1 deletion in developing brain promotes the disruption of ER and Cis/Trans Golgi homeostasis in neurons, followed by ER-stress increase. Interestingly, Rint1 deficiency was also associated with the inhibition of the autophagosome clearance. Altogether, our findings highlight the crucial roles of Rint1 in vivo in genomic stability maintenance, as well as in prevention of ER stress and autophagy.
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17
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Wang J, Betancourt A, Jenkins S, Biro F, Pinney SM, Chen D, Russo J, Lamartiniere CA. Altered blood proteome in girls with high urine concentrations of bisphenol a, genistein, mono-ethyl hexylphthalate and mono-benzyl phthalate. ACTA ACUST UNITED AC 2015; 2:44-57. [PMID: 31360934 DOI: 10.15406/mojpb.2015.02.00040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Children exposed to endocrine disruptors are hypothesized to be susceptible for cancer development later in life. Identifying functional biomarkers of specific exposures may indicate predisposition for this disease. The objectives of this study were to identify protein biomarkers of 1) effect and 2) susceptibility for cancer from the blood of girls exposed to select environmental chemicals. In prepubertal girls, urine concentrations of bisphenol A (BPA), genistein, mono-ethyl hexylphthalate (MEHP) and mono-benzyl phthalate (MBzP) were used to identify girls in the top quintile of exposure for each of these environmental chemicals, and age-matched prepubertal girls with urine analyte concentrations below the median. Blood samples of these girls were depleted of the seven most abundant proteins using human-specific affinity spin columns. Using isobaric Tandem Mass Tags and quantitative mass spectrometry (TMT-MS), 51, 34, 57 and 47 differentially expressed proteins were identified from the blood of prepubertal girls with high urine concentrations of BPA, genistein, MEHP and MBzP, respectively, compared to controls. The data demonstrates the potential of proteomic technology to not only provide biomarkers of effect from aminimally invasive source of biological material, blood, but to identify protein molecules that are intimately involved in the pathobiology of cancer. The differentially regulated cancer associated proteins in girls with high concentrations of BPA and genistein are consistent with reported roles of BPA in carcinogenesis and of genistein in mammary cancer prevention, respectively.
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Affiliation(s)
- Jun Wang
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, USA
| | - Angela Betancourt
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, USA
| | - Sarah Jenkins
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, USA
| | - Frank Biro
- Division of Adolescent Medicine, Children's Hospital Medical Center, USA
| | - Susan M Pinney
- Department of Environmental Health, University of Cincinnati College of Medicine, USA
| | - Dongquan Chen
- Division of Preventive Medicine, UAB.,UAB Comprehensive Cancer Center, University of Alabama at Birmingham, USA
| | - Jose Russo
- The Irma Russo Breast Cancer Research Laboratory, Fox Chase Cancer Center-Temple University Health System, USA
| | - Coral A Lamartiniere
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, USA.,UAB Comprehensive Cancer Center, University of Alabama at Birmingham, USA
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Liu S, Storrie B. How Rab proteins determine Golgi structure. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 315:1-22. [PMID: 25708460 DOI: 10.1016/bs.ircmb.2014.12.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Rab proteins, small GTPases, are key regulators of mammalian Golgi apparatus organization. Based on the effect of Rab activation state, Rab proteins fall into two functional classes. In Class1, inactivation induces Golgi ribbon fragmentation and/or redistribution of Golgi enzymes to the Endoplasmic Reticulum, while overexpression of wild type or activation has little, if any, effect on Golgi ribbon organization. In Class 2, the reverse is true. We give emphasis to Rab6, the most abundant Golgi-associated Rab protein. Rab6 depletion in HeLa cells causes an increase in Golgi cisternal number, longer, more continuous cisternae, and a pronounced accumulation of vesicles; the effect of Rab6 on Golgi ribbon organization is probably through regulation of vesicle transport. In effector studies, motor proteins and their regulators are found to be key Rab6 effectors. A related Rab, Rab41, affects Golgi ribbon organization in a contrasting manner. The balance between minus- and plus-end directed motor recruitment may well be the major Rab-dependent factor in Golgi ribbon organization.
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Affiliation(s)
- Shijie Liu
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Brian Storrie
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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19
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Fission yeast Drp1 is an essential protein required for recovery from DNA damage and chromosome segregation. DNA Repair (Amst) 2014; 24:98-106. [DOI: 10.1016/j.dnarep.2014.09.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 08/08/2014] [Accepted: 09/16/2014] [Indexed: 11/24/2022]
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20
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Ngeow J, Eng C. BluepRINT for moderate-to-low penetrance cancer susceptibility genes needed: breast cancer and beyond. Cancer Discov 2014; 4:762-3. [PMID: 25002613 DOI: 10.1158/2159-8290.cd-14-0498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
SUMMARY RINT1 is a novel moderately penetrant cancer susceptibility gene seen in breast cancer as well as possibly in Lynch syndrome-related cancers.
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Affiliation(s)
- Joanne Ngeow
- Authors' Affiliations:Division of Medical Oncology, National Cancer Centre; Oncology Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore; Genomic Medicine Institute
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Taussig Cancer Institute, and Stanley Shalom Zielony Institute of Nursing Excellence, Cleveland Clinic; Department of Genetics and Genome Sciences; and Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio
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21
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Park DJ, Tao K, Le Calvez-Kelm F, Nguyen-Dumont T, Robinot N, Hammet F, Odefrey F, Tsimiklis H, Teo ZL, Thingholm LB, Young EL, Voegele C, Lonie A, Pope BJ, Roane TC, Bell R, Hu H, Shankaracharya, Huff CD, Ellis J, Li J, Makunin IV, John EM, Andrulis IL, Terry MB, Daly M, Buys SS, Snyder C, Lynch HT, Devilee P, Giles GG, Hopper JL, Feng BJ, Lesueur F, Tavtigian SV, Southey MC, Goldgar DE. Rare mutations in RINT1 predispose carriers to breast and Lynch syndrome-spectrum cancers. Cancer Discov 2014; 4:804-15. [PMID: 25050558 PMCID: PMC4234633 DOI: 10.1158/2159-8290.cd-14-0212] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
UNLABELLED Approximately half of the familial aggregation of breast cancer remains unexplained. A multiple-case breast cancer family exome-sequencing study identified three likely pathogenic mutations in RINT1 (NM_021930.4) not present in public sequencing databases: RINT1 c.343C>T (p.Q115X), c.1132_1134del (p.M378del), and c.1207G>T (p.D403Y). On the basis of this finding, a population-based case-control mutation-screening study was conducted that identified 29 carriers of rare (minor allele frequency < 0.5%), likely pathogenic variants: 23 in 1,313 early-onset breast cancer cases and six in 1,123 frequency-matched controls [OR, 3.24; 95% confidence interval (CI), 1.29-8.17; P = 0.013]. RINT1 mutation screening of probands from 798 multiple-case breast cancer families identified four additional carriers of rare genetic variants. Analysis of the incidence of first primary cancers in families of women carrying RINT1 mutations estimated that carriers were at increased risk of Lynch syndrome-spectrum cancers [standardized incidence ratio (SIR), 3.35; 95% CI, 1.7-6.0; P = 0.005], particularly for relatives diagnosed with cancer under the age of 60 years (SIR, 10.9; 95% CI, 4.7-21; P = 0.0003). SIGNIFICANCE The work described in this study adds RINT1 to the growing list of genes in which rare sequence variants are associated with intermediate levels of breast cancer risk. Given that RINT1 is also associated with a spectrum of cancers with mismatch repair defects, these findings have clinical applications and raise interesting biological questions.
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Affiliation(s)
- Daniel J Park
- Genetic Epidemiology Laboratory, Department of Pathology
| | | | | | | | - Nivonirina Robinot
- Genetic Cancer Susceptibility Group, International Agency for Research on Cancer, Lyon
| | - Fleur Hammet
- Genetic Epidemiology Laboratory, Department of Pathology
| | | | | | - Zhi L Teo
- Genetic Epidemiology Laboratory, Department of Pathology
| | | | | | - Catherine Voegele
- Genetic Cancer Susceptibility Group, International Agency for Research on Cancer, Lyon
| | | | - Bernard J Pope
- Department of Computing and Information Systems; Victorian Life Sciences Computation Initiative
| | | | | | - Hao Hu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Shankaracharya
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Chad D Huff
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jonathan Ellis
- The QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia; Departments of
| | - Jun Li
- The QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia; Departments of
| | - Igor V Makunin
- The QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia; Departments of
| | - Esther M John
- Cancer Prevention Institute of California, Fremont; Department of Health Research and Policy, Stanford Cancer Institute, Stanford, California
| | - Irene L Andrulis
- Department of Molecular Genetics, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Mary B Terry
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York
| | - Mary Daly
- Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Saundra S Buys
- Huntsman Cancer Institute, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Carrie Snyder
- Department of Preventive Medicine, Creighton University, Omaha, Nebraska
| | - Henry T Lynch
- Department of Preventive Medicine, Creighton University, Omaha, Nebraska
| | - Peter Devilee
- Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands; and
| | - Graham G Giles
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne; Centre for Cancer Epidemiology, The Cancer Council Victoria, Carlton, Victoria
| | - John L Hopper
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne; School of Public Health, Seoul National University, Seoul, Korea
| | - Bing-Jian Feng
- Dermatology, Huntsman Cancer Institute, University of Utah School of Medicine; Huntsman Cancer Institute, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Fabienne Lesueur
- Genetic Cancer Susceptibility Group, International Agency for Research on Cancer, Lyon; Genetic Epidemiology of Cancer Team, Institut National de la Santé et de la Recherche Medicale (INSERM), U900, Institut Curie, Mines ParisTech, Paris, France
| | | | | | - David E Goldgar
- Dermatology, Huntsman Cancer Institute, University of Utah School of Medicine; Huntsman Cancer Institute, University of Utah Health Sciences Center, Salt Lake City, Utah;
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22
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Tagaya M, Arasaki K, Inoue H, Kimura H. Moonlighting functions of the NRZ (mammalian Dsl1) complex. Front Cell Dev Biol 2014; 2:25. [PMID: 25364732 PMCID: PMC4206994 DOI: 10.3389/fcell.2014.00025] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 05/20/2014] [Indexed: 12/31/2022] Open
Abstract
The yeast Dsl1 complex, which comprises Dsl1, Tip20, and Sec39/Dsl3, has been shown to participate, as a vesicle-tethering complex, in retrograde trafficking from the Golgi apparatus to the endoplasmic reticulum. Its metazoan counterpart NRZ complex, which comprises NAG, RINT1, and ZW10, is also involved in Golgi-to-ER retrograde transport, but each component of the complex has diverse cellular functions including endosome-to-Golgi transport, cytokinesis, cell cycle checkpoint, autophagy, and mRNA decay. In this review, we summarize the current knowledge of the metazoan NRZ complex and discuss the "moonlighting" functions and intercorrelation of their subunits.
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Affiliation(s)
- Mitsuo Tagaya
- Department of Molecular Life Sciences, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences Hachioji, Japan
| | - Kohei Arasaki
- Department of Molecular Life Sciences, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences Hachioji, Japan
| | - Hiroki Inoue
- Department of Molecular Life Sciences, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences Hachioji, Japan
| | - Hana Kimura
- Department of Molecular Life Sciences, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences Hachioji, Japan
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23
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Li L, Shimada T, Takahashi H, Koumoto Y, Shirakawa M, Takagi J, Zhao X, Tu B, Jin H, Shen Z, Han B, Jia M, Kondo M, Nishimura M, Hara-Nishimura I. MAG2 and three MAG2-INTERACTING PROTEINs form an ER-localized complex to facilitate storage protein transport in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2013; 76:781-91. [PMID: 24118572 DOI: 10.1111/tpj.12347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 09/03/2013] [Accepted: 09/09/2013] [Indexed: 05/20/2023]
Abstract
In Arabidopsis thaliana, MAIGO 2 (MAG2) is involved in protein transport between the endoplasmic reticulum (ER) and the Golgi apparatus via its association with the ER-localized t-SNARE components SYP81/AtUfe1 and SEC20. To characterize the molecular machinery of MAG2-mediated protein transport, we explored MAG2-interacting proteins using transgenic A. thaliana plants expressing TAP-tagged MAG2. We identified three proteins, which were designated as MAG2-INTERACTING PROTEIN 1-3 [MIP1 (At2g32900), MIP2 (At5g24350) and MIP3 (At2g42700)]. Both MIP1 and MAG2 localized to the ER membrane. All of the mag2, mip1, mip2 and mip3 mutants exhibited a defect in storage protein maturation, and developed abnormal storage protein body (MAG body) structures in the ER of seed cells. These observations suggest that MIPs are closely associated with MAG2 and function in protein transport between the ER and Golgi apparatus. MIP1 and MIP2 contain a Zeste-White 10 (ZW10) domain and a Sec39 domain, respectively, but have low sequence identities (21% and 23%) with respective human orthologs. These results suggest that the plant MAG2-MIP1-MIP2 complex is a counterpart of the triple-subunit tethering complexes in yeast (Tip20p-Dsl1p-Sec39p) and humans (RINT1-ZW10-NAG). Surprisingly, the plant complex also contained a fourth member (MIP3) with a Sec1 domain. There have been no previous reports showing that a Sec1-containing protein is a subunit of ER-localized tethering complexes. Our results suggest that MAG2 and the three MIP proteins form a unique complex on the ER that is responsible for efficient transport of seed storage proteins.
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Affiliation(s)
- Lixin Li
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-Alkali Vegetation Ecology Restoration in Oil Field (SAVER), Ministry of Education, Northeast Forestry University, Harbin, 150040, China; Department of Botany, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan; College of Life Science, Northeast Forestry University, Harbin, 150040, China
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24
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Arasaki K, Takagi D, Furuno A, Sohda M, Misumi Y, Wakana Y, Inoue H, Tagaya M. A new role for RINT-1 in SNARE complex assembly at the trans-Golgi network in coordination with the COG complex. Mol Biol Cell 2013; 24:2907-17. [PMID: 23885118 PMCID: PMC3771952 DOI: 10.1091/mbc.e13-01-0014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Yeast Tip20, a subunit of the Dsl1 complex, is implicated in Golgi-to–endoplasmic reticulum retrograde transport. Differing from Tip20, its mammalian counterpart, RINT-1, is required for endosome-to–trans-Golgi network transport. RINT-1 in coordination with the COG complex regulates SNARE complex assembly at the trans-Golgi network. Docking and fusion of transport vesicles/carriers with the target membrane involve a tethering factor–mediated initial contact followed by soluble N-ethylmaleimide–sensitive factor attachment protein receptor (SNARE)–catalyzed membrane fusion. The multisubunit tethering CATCHR family complexes (Dsl1, COG, exocyst, and GARP complexes) share very low sequence homology among subunits despite likely evolving from a common ancestor and participate in fundamentally different membrane trafficking pathways. Yeast Tip20, as a subunit of the Dsl1 complex, has been implicated in retrograde transport from the Golgi apparatus to the endoplasmic reticulum. Our previous study showed that RINT-1, the mammalian counterpart of yeast Tip20, mediates the association of ZW10 (mammalian Dsl1) with endoplasmic reticulum–localized SNARE proteins. In the present study, we show that RINT-1 is also required for endosome-to–trans-Golgi network trafficking. RINT-1 uncomplexed with ZW10 interacts with the COG complex, another member of the CATCHR family complex, and regulates SNARE complex assembly at the trans-Golgi network. This additional role for RINT-1 may in part reflect adaptation to the demand for more diverse transport routes from endosomes to the trans-Golgi network in mammals compared with those in a unicellular organism, yeast. The present findings highlight a new role of RINT-1 in coordination with the COG complex.
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Affiliation(s)
- Kohei Arasaki
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan Division of Oral Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata 951-8514, Japan Department of Cell Biology, Fukuoka University School of Medicine, Jonan-ku, Fukuoka 814-0180, Japan
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25
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Yang X, Li L, Liang J, Shi L, Yang J, Yi X, Zhang D, Han X, Yu N, Shang Y. Histone acetyltransferase 1 promotes homologous recombination in DNA repair by facilitating histone turnover. J Biol Chem 2013; 288:18271-82. [PMID: 23653357 PMCID: PMC3689969 DOI: 10.1074/jbc.m113.473199] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 05/07/2013] [Indexed: 01/05/2023] Open
Abstract
Faithful repair of DNA double-strand breaks is vital to the maintenance of genome integrity and proper cell functions. Histone modifications, such as reversible acetylation, phosphorylation, methylation, and ubiquitination, which collectively contribute to the establishment of distinct chromatin states, play important roles in the recruitment of repair factors to the sites of double-strand breaks. Here we report that histone acetyltransferase 1 (HAT1), a classical B type histone acetyltransferase responsible for acetylating the N-terminal tail of newly synthesized histone H4 in the cytoplasm, is a key regulator of DNA repair by homologous recombination in the nucleus. We found that HAT1 is required for the incorporation of H4K5/K12-acetylated H3.3 at sites of double-strand breaks through its HIRA-dependent histone turnover activity. Incorporated histones with specific chemical modifications facilitate subsequent recruitment of RAD51, a key repair factor in mammalian cells, to promote efficient homologous recombination. Significantly, depletion of HAT1 sensitized cells to DNA damage compromised the global chromatin structure, inhibited cell proliferation, and induced cell apoptosis. Our experiments uncovered a role for HAT1 in DNA repair in higher eukaryotic organisms and provide a mechanistic insight into the regulation of histone dynamics by HAT1.
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Affiliation(s)
- Xiaohan Yang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Lei Li
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Jing Liang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Lei Shi
- Tianjin Key Laboratory of Medical Epigenetics, Department of Biochemistry and Molecular Biology, Tianjin Medical University, Tianjin 300070, China
| | - Jianguo Yang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Xia Yi
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Di Zhang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Xiao Han
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Na Yu
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
| | - Yongfeng Shang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing 100191, China and
- Tianjin Key Laboratory of Medical Epigenetics, Department of Biochemistry and Molecular Biology, Tianjin Medical University, Tianjin 300070, China
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26
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Zhao P, Liu F, Zhang B, Liu X, Wang B, Gong J, Yu G, Ma M, Lu Y, Sun J, Wang Z, Jia P, Liu H. MAIGO2 is involved in abscisic acid-mediated response to abiotic stresses and Golgi-to-ER retrograde transport. PHYSIOLOGIA PLANTARUM 2013; 148:246-60. [PMID: 23025793 DOI: 10.1111/j.1399-3054.2012.01704.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 08/29/2012] [Accepted: 09/09/2012] [Indexed: 05/24/2023]
Abstract
The central role of multisubunit tethering complexes in intracellular trafficking has been established in yeast and mammalian systems. However, little is known about their roles in the stress responses and the early secretory pathway in Arabidopsis. In this study, Maigo2 (MAG2), which is equivalent to the yeast Tip20p and mammalian Rad50-interacting protein, is found to be required for the responses to salt stress, osmotic stress and abscisic acid in seed germination and vegetative growth, and MAG2-like (MAG2L) is partially redundant with MAG2 in response to environmental stresses. MAG2 strongly interacts with the central region of ZW10, and both proteins are important as plant endoplasmic reticulum (ER)-stress regulators. ER morphology and vacuolar protein trafficking are unaffected in the mag2, mag2l and zw10 mutants, and the secretory marker to the apoplast is correctly transported in mag2 plants, which indicate that MAG2 functions as a complex with ZW10, and is potentially involved in Golgi-to-ER retrograde trafficking. Therefore, a new role for ER-Golgi membrane trafficking in abiotic-stress and ER-stress responses is discovered.
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Affiliation(s)
- Pengshan Zhao
- Laboratory of Plant Stress Ecophysiology and Biotechnology, Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
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27
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DNA damage sensor MRE11 recognizes cytosolic double-stranded DNA and induces type I interferon by regulating STING trafficking. Proc Natl Acad Sci U S A 2013; 110:2969-74. [PMID: 23388631 DOI: 10.1073/pnas.1222694110] [Citation(s) in RCA: 281] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Double-stranded DNA (dsDNA) derived from pathogen- or host-damaged cells triggers innate immune responses when exposed to cytoplasm. However, the machinery underlying the primary recognition of intracellular dsDNA is obscure. Here we show that the DNA damage sensor, meiotic recombination 11 homolog A (MRE11), serves as a cytosolic sensor for dsDNA. Cells with a mutation of MRE11 gene derived from a patient with ataxia-telangiectasia-like disorder, and cells in which Mre11 was knocked down, had defects in dsDNA-induced type I IFN production. MRE11 physically interacted with dsDNA in the cytoplasm and was required for activation of stimulator of IFN genes (STING) and IRF3. RAD50, a binding protein to MRE11, was also required for dsDNA responses, whereas NBS1, another binding protein to MRE11, was dispensable. Collectively, our results suggest that the MRE11-RAD50 complex plays important roles in recognition of dsDNA and initiation of STING-dependent signaling, in addition to its role in DNA-damage responses.
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28
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Quayle SN, Chheda MG, Shukla SA, Wiedemeyer R, Tamayo P, Dewan RW, Zhuang L, Huang-Hobbs E, Haidar S, Xiao Y, Ligon KL, Hahn WC, Chin L. Integrative functional genomics identifies RINT1 as a novel GBM oncogene. Neuro Oncol 2012; 14:1325-31. [PMID: 23074196 PMCID: PMC3480269 DOI: 10.1093/neuonc/nos246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Large-scale cancer genomics efforts are identifying hundreds of somatic genomic alterations in glioblastoma (GBM). Distinguishing between active driver and neutral passenger alterations requires functional assessment of each gene; therefore, integrating biological weight of evidence with statistical significance for each genomic alteration will enable better prioritization for downstream studies. Here, we demonstrate the feasibility and potential of in vitro functional genomic screens to rapidly and systematically prioritize high-probability candidate genes for in vivo validation. Integration of low-complexity gain- and loss-of-function screens designed on the basis of genomic data identified 6 candidate GBM oncogenes, and RINT1 was validated as a novel GBM oncogene based on its ability to confer tumorigenicity to primary nontransformed murine astrocytes in vivo. Cancer genomics-guided low-complexity genomic screens can quickly provide a functional filter to prioritize high-value targets for further downstream mechanistic and translational studies.
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Affiliation(s)
- Steven N Quayle
- Department of Medical Oncology, Dana-Farber Cancer Institute, Dana-Farber Cancer Institute, Boston, MA 02215, USA
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29
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Spang A. The DSL1 complex: the smallest but not the least CATCHR. Traffic 2012; 13:908-13. [PMID: 22486903 DOI: 10.1111/j.1600-0854.2012.01362.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 04/03/2012] [Accepted: 04/06/2012] [Indexed: 01/04/2023]
Abstract
The DSL1 complex is a conserved tethering complex at the endoplasmic reticulum that recognizes Golgi-derived COPI vesicles and hands them over to the fusion machinery. The DSL1 complex is the simplest tethering complex of the complexes associated with tethering containing helical rods (CATCHR) family. CATCHR tethering complexes play a role at compartments along the exocytic and endocytic pathways. In this review, different functions of the DSL1 complex are discussed, some open questions with the seemingly straightforward picture are pointed out and alternative functions of the DSL1 complex members are mentioned.
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Affiliation(s)
- Anne Spang
- Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.
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30
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Abstract
The Golgi apparatus lies at the heart of the secretory pathway where it receives, modifies and sorts protein cargo to the proper intracellular or extracellular location. Although this secretory function is highly conserved throughout the eukaryotic kingdom, the structure of the Golgi complex is arranged very differently among species. In particular, Golgi membranes in vertebrate cells are integrated into a single compact entity termed the Golgi ribbon that is normally localized in the perinuclear area and in close vicinity to the centrosomes. This organization poses a challenge for cell division when the single Golgi ribbon needs to be partitioned into the two daughter cells. To ensure faithful inheritance in the progeny, the Golgi ribbon is divided in three consecutive steps in mitosis, namely disassembly, partitioning and reassembly. However, the structure of the Golgi ribbon is only present in higher animals and Golgi disassembly during mitosis is not ubiquitous in all organisms. Therefore, there must be unique reasons to build up the Golgi in this particular conformation and to preserve it over generations. In this review, we first highlight the diversity of the Golgi architecture in different organisms and revisit the concept of the Golgi ribbon. Following on, we discuss why the ribbon is needed and how it forms in vertebrate cells. Lastly, we conclude with likely purposes of mitotic ribbon disassembly and further propose mechanisms by which it regulates mitosis.
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Affiliation(s)
- Jen-Hsuan Wei
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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31
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Schmitt HD. Dsl1p/Zw10: common mechanisms behind tethering vesicles and microtubules. Trends Cell Biol 2010; 20:257-68. [PMID: 20226673 DOI: 10.1016/j.tcb.2010.02.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 01/20/2010] [Accepted: 02/02/2010] [Indexed: 12/21/2022]
Abstract
Fusion of Golgi-derived COP (coat protein)-I vesicles with the endoplasmic reticulum (ER) is initiated by specific tethering complexes: the Dsl1 (depends on SLY1-20) complex in yeast and the syntaxin 18 complex in mammalian cells. Both tethering complexes are firmly associated with soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) at the ER. The structure of the Dsl1 tethering complex has been determined recently. The complex seems to be designed to expose an unstructured domain of Dsl1p at its top, which is required to capture vesicles. The subunit composition and the interactions within the equivalent mammalian complex are similar. Interestingly, some of the mammalian counterparts have additional functions during mitosis in animal cells. Zw10, the metazoan homolog of Dsl1p, is an important component of a complex that monitors the correct tethering of microtubules to kinetochores during cell division. This review brings together evidence to suggest that there could be common mechanisms behind these different activities, giving clues as to how they might have evolved.
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Affiliation(s)
- Hans Dieter Schmitt
- Department of Neurobiology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany.
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32
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Wu G, Wei R, Cheng E, Ngo B, Lee WH. Hec1 contributes to mitotic centrosomal microtubule growth for proper spindle assembly through interaction with Hice1. Mol Biol Cell 2009; 20:4686-95. [PMID: 19776357 DOI: 10.1091/mbc.e08-11-1123] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Previous studies have stipulated Hec1 as a conserved kinetochore component critical for mitotic control in part by directly binding to kinetochore fibers of the mitotic spindle and by recruiting spindle assembly checkpoint proteins Mad1 and Mad2. Hec1 has also been reported to localize to centrosomes, but its function there has yet to be elucidated. Here, we show that Hec1 specifically colocalizes with Hice1, a previously characterized centrosomal microtubule-binding protein, at the spindle pole region during mitosis. In addition, the C-terminal region of Hec1 directly binds to the coiled-coil domain 1 of Hice1. Depletion of Hice1 by small interfering RNA (siRNA) reduced levels of Hec1 in the cell, preferentially at centrosomes and spindle pole vicinity. Reduction of de novo microtubule nucleation from mitotic centrosomes can be observed in cells treated with Hec1 or Hice1 siRNA. Consistently, neutralization of Hec1 or Hice1 by specific antibodies impaired microtubule aster formation from purified mitotic centrosomes in vitro. Last, disruption of the Hec1/Hice1 interaction by overexpressing Hice1DeltaCoil1, a mutant defective in Hec1 interaction, elicited abnormal spindle morphology often detected in Hec1 and Hice1 deficient cells. Together, the results suggest that Hec1, through cooperation with Hice1, contributes to centrosome-directed microtubule growth to facilitate establishing a proper mitotic spindle.
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Affiliation(s)
- Guikai Wu
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, Irvine, CA 92697, USA
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Oikarinen SI, Cleveland AG, Cork KM, Bynoté KK, Rafter JJ, Gustafsson JA, Mutanen M, Gould KA. Genetic mapping of Mom5, a novel modifier of Apc(Min)-induced intestinal tumorigenesis. Carcinogenesis 2009; 30:1591-6. [PMID: 19574546 DOI: 10.1093/carcin/bgp159] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The initial purpose of this study was to assess the role of estrogen receptor beta (ERbeta) in intestinal tumorigenesis by examining the effects of an ERbeta knockout (ERbeta(-/-)) on Apc(Min) mice. In order to accomplish this goal on a uniform genetic background, we were required to backcross the ERbeta knockout from the 129P2 genetic background to the B6 genetic background for 10 generations. Midway through this process, we performed a test cross in which mice from the N(5) backcross generation of the ERbeta knockout strain were intercrossed with Apc(Min/+) mice to obtain Apc(Min/+) ERbeta(+/+), Apc(Min/+) ERbeta(+/-) and Apc(Min/+) ERbeta(-/-) mice. Intestinal tumorigenesis in the N(5)F(2) mice was evaluated at 14 weeks of age. The analysis of the impact of ERbeta in the N(5) cross was complicated by segregating 129P2-derived alleles that affected tumor number and were unlinked to ERbeta. Genetic linkage analysis of this cross permitted the localization of a single genetic modifier of tumor number in Apc(Min/+) mice. This locus, Modifier of Min 5 (Mom5), maps to proximal mouse chromosome 5; the 129P2 allele of this locus is associated with a 50% reduction in mean intestinal tumor number. Through in silico analysis and confirmatory sequencing, we have identified the Rad50-interacting protein-1 gene as a strong candidate for Mom5.
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Affiliation(s)
- Seija I Oikarinen
- Department of Applied Chemistry and Microbiology (Nutrition), University of Helsinki, PO Box 66, Helsinki FIN-00014, Finland
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34
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Aoki T, Ichimura S, Itoh A, Kuramoto M, Shinkawa T, Isobe T, Tagaya M. Identification of the neuroblastoma-amplified gene product as a component of the syntaxin 18 complex implicated in Golgi-to-endoplasmic reticulum retrograde transport. Mol Biol Cell 2009; 20:2639-49. [PMID: 19369418 DOI: 10.1091/mbc.e08-11-1104] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Syntaxin 18, a soluble N-ethylmaleimide-sensitive factor (NSF) attachment protein receptor (SNARE) protein implicated in endoplasmic reticulum (ER) membrane fusion, forms a complex with other SNAREs (BNIP1, p31, and Sec22b) and several peripheral membrane components (Sly1, ZW10, and RINT-1). In the present study, we showed that a peripheral membrane protein encoded by the neuroblastoma-amplified gene (NAG) is a subunit of the syntaxin 18 complex. NAG encodes a protein of 2371 amino acids, which exhibits weak similarity to yeast Dsl3p/Sec39p, an 82-kDa component of the complex containing the yeast syntaxin 18 orthologue Ufe1p. Under conditions favoring SNARE complex disassembly, NAG was released from syntaxin 18 but remained in a p31-ZW10-RINT-1 subcomplex. Binding studies showed that the extreme N-terminal region of p31 is responsible for the interaction with NAG and that the N- and the C-terminal regions of NAG interact with p31 and ZW10-RINT-1, respectively. Knockdown of NAG resulted in a reduction in the expression of p31, confirming their intimate relationship. NAG depletion did not substantially affect Golgi morphology and protein export from the ER, but it caused redistribution of Golgi recycling proteins accompanied by a defect in protein glycosylation. These results together suggest that NAG links between p31 and ZW10-RINT-1 and is involved in Golgi-to-ER transport.
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Affiliation(s)
- Takehiro Aoki
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
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35
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Inoue M, Arasaki K, Ueda A, Aoki T, Tagaya M. N-terminal region of ZW10 serves not only as a determinant for localization but also as a link with dynein function. Genes Cells 2008; 13:905-14. [PMID: 18782227 DOI: 10.1111/j.1365-2443.2008.01215.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
ZW10 interacts with dynamitin, a subunit of the dynein accessory complex dynactin, and functions in termination of the spindle checkpoint during mitosis and in membrane transport between the endoplasmic reticulum (ER) and Golgi apparatus during interphase. Its associations with kinetochores and ER membranes are mediated by Zwint-1 and RINT-1, respectively. A previous yeast two-hybrid study showed that the C-terminal region of ZW10 interacts with dynamitin, and part of this region has been used as an inhibitor of ZW10 function. In the present study, we reinvestigated the interaction between ZW10 and dynamitin, and showed that the N-terminal region of ZW10 is the major binding site for dynamitin and, like full-length ZW10, could potentially move along microtubules to the centrosomal area in a dynein-dynactin-dependent manner. Competitive binding experiments demonstrated that dynamitin and RINT-1 occupy the same N-terminal region of ZW10 in a mutually exclusive fashion. Consistent with this, over-expression of RINT-1 interfered with the dynein-dynactin-mediated movement of ZW10 to the centrosomal area. Given that the N-terminal region of ZW10 also interacts with Zwint-1, this region may be important for switching partners; one partner is a determinant for localization (kinetochore and ER) and the other links ZW10 to dynein function.
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Affiliation(s)
- Mamiko Inoue
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
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36
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Arasaki K, Uemura T, Tani K, Tagaya M. Correlation of Golgi localization of ZW10 and centrosomal accumulation of dynactin. Biochem Biophys Res Commun 2007; 359:811-6. [PMID: 17560939 DOI: 10.1016/j.bbrc.2007.05.188] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Accepted: 05/30/2007] [Indexed: 12/20/2022]
Abstract
ZW10 participates in the termination of the spindle checkpoint during mitosis by interacting with dynamitin, a subunit of the dynein accessory complex dynactin. We previously showed that ZW10 is attached to the endoplasmic reticulum through RINT-1 in interphase HeLa cells and involved in membrane transport between the endoplasmic reticulum and Golgi. Although a recent study demonstrated that ZW10 is localized in the Golgi in COS7 cells, the mechanism that regulates ZW10 localization remains unknown. In this study we showed a correlation between the Golgi localization of ZW10 and the centrosomal accumulation of dynactin. The amounts of ZW10 associated with dynactin were larger in cells where ZW10 was present in the Golgi than those where ZW10 was not in the Golgi. The targeting of ZW10 to the perinuclear Golgi region was found to depend on the perinuclear accumulation of dynactin, suggesting that dynactin regulates ZW10 localization.
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Affiliation(s)
- Kohei Arasaki
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
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37
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Lin X, Liu CC, Gao Q, Zhang X, Wu G, Lee WH. RINT-1 serves as a tumor suppressor and maintains Golgi dynamics and centrosome integrity for cell survival. Mol Cell Biol 2007; 27:4905-16. [PMID: 17470549 PMCID: PMC1951495 DOI: 10.1128/mcb.02396-06] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Faithful mitotic partitioning of the Golgi apparatus and the centrosome is critical for proper cell division. Although these two cytoplasmic organelles are probably coordinated during cell division, supporting evidence of this coordination is still largely lacking. Here, we show that the RAD50-interacting protein, RINT-1, is localized at the Golgi apparatus and the centrosome in addition to the endoplasmic reticulum. To examine the biological roles of RINT-1, we found that the homozygous deletion of Rint-1 caused early embryonic lethality at embryonic day 5 (E5) to E6 and the failure of blastocyst outgrowth ex vivo. About 81% of the Rint-1 heterozygotes succumbed to multiple tumor formation with haploinsufficiency during their average life span of 24 months. To pinpoint the cellular function of RINT-1, we found that RINT-1 depletion by RNA interference led to the loss of the pericentriolar positioning and dispersal of the Golgi apparatus and concurrent centrosome amplification during the interphase. Upon mitotic entry, RINT-1-deficient cells exhibited multiple abnormalities, including aberrant Golgi dynamics during early mitosis and defective reassembly at telophase, increased formation of multiple spindle poles, and frequent chromosome missegregation. Mitotic cells often underwent cell death in part due to the overwhelming cellular defects. Taken together, these findings suggest that RINT-1 serves as a novel tumor suppressor essential for maintaining the dynamic integrity of the Golgi apparatus and the centrosome, a prerequisite to their proper coordination during cell division.
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Affiliation(s)
- Xiaoqin Lin
- Department of Biological Chemistry, 124 Sprague Hall, 839 Medical Science Ct., University of California, Irvine, Irvine, CA 92697, USA
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38
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Li L, Shimada T, Takahashi H, Ueda H, Fukao Y, Kondo M, Nishimura M, Hara-Nishimura I. MAIGO2 is involved in exit of seed storage proteins from the endoplasmic reticulum in Arabidopsis thaliana. THE PLANT CELL 2006; 18:3535-47. [PMID: 17194767 PMCID: PMC1785406 DOI: 10.1105/tpc.106.046151] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Seed storage proteins are synthesized on the endoplasmic reticulum (ER) as precursors and then transported to protein storage vacuoles, where they are processed into mature forms. Here, we isolated an Arabidopsis thaliana mutant, maigo2 (mag2), that accumulated the precursors of two major storage proteins, 2S albumin and 12S globulin, in dry seeds. mag2 seed cells contained many novel structures, with an electron-dense core that was composed of the precursor forms of 2S albumin. 12S globulins were segregated from 2S albumin and were localized in the matrix region of the structures together with the ER chaperones lumenal binding protein and protein disulfide isomerase, which were more abundant in mag2 seeds. The MAG2 gene was identified as At3g47700, and the MAG2 protein had a RINT-1/TIP20 domain in the C-terminal region. We found that some MAG2 molecules were peripherally associated with the ER membrane. MAG2 had an ability to bind to two ER-localized t-SNAREs (for target-soluble NSF [N-ethylmaleimide-sensitive fusion protein] attachment protein receptor; At Sec20 and At Ufe1). Our findings suggest that MAG2 functions in the transport of storage protein precursors between the ER and Golgi complex in plants.
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Affiliation(s)
- Lixin Li
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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39
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Vallee RB, Varma D, Dujardin DL. ZW10 function in mitotic checkpoint control, dynein targeting and membrane trafficking: is dynein the unifying theme? Cell Cycle 2006; 5:2447-51. [PMID: 17102640 PMCID: PMC2794429 DOI: 10.4161/cc.5.21.3395] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
ZW10 was initially identified as a mitotic checkpoint protein involved in chromosome segregation. It was subsequently implicated in targeting cytoplasmic dynein and dynactin to mitotic kinetochores, though the relationship between these functions remains incompletely understood. Recent studies have revealed that ZW10 performs important functions in nondividing cells as well. These include cytoplasmic dynein targeting to Golgi and other membranes, but also SNARE-mediated ER-Golgi trafficking. Identifying a unifying function for ZW10 in these diverse contexts has been elusive, but likely involves cytoplasmic dynein, as discussed here.
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Affiliation(s)
- Richard B Vallee
- Deptartment of Pathology and Cell Biology, Columbia University, New York, New York 10032, USA.
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40
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Lin YT, Chen Y, Wu G, Lee WH. Hec1 sequentially recruits Zwint-1 and ZW10 to kinetochores for faithful chromosome segregation and spindle checkpoint control. Oncogene 2006; 25:6901-14. [PMID: 16732327 DOI: 10.1038/sj.onc.1209687] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Faithful chromosome segregation is essential for maintaining the genomic integrity, which requires coordination among chromosomes, kinetochores, centrosomes and spindles during mitosis. Previously, we discovered a novel coiled-coil protein, highly expressed in cancer 1 (Hec1), which is indispensable for this process. However, the precise underlying mechanism remains unclear. Here, we show that Hec1 directly interacts with human ZW10 interacting protein (Zwint-1), a binding partner of Zeste White 10 (ZW10) that is required for chromosome motility and spindle checkpoint control. In mitotic cells, Hec1 transiently forms complexes with Zwint-1 and ZW10 in a temporal and spatial manner. Although the three proteins have variable cell cycle-dependent expression profiles, they can only be co-immunoprecipitated during M phase. Immunofluorescent study showed that Hec1 and Zwint-1 co-localize at kinetochores beginning at prophase and that ZW10 joins them later at prometaphase. Depletion of Hec1 impairs the recruitment of both Zwint-1 and ZW10 to kinetochores, while depletion of Zwint-1 abrogates the kinetochore localization of ZW10 but not Hec1. The results suggest that the localization of Hec1 at kinetochores is required for the sequential recruitment of Zwint-1 and ZW10. Disrupting this recruitment by inhibiting the expression of Hec1 or Zwint-1 causes chromosome missegregation, spindle checkpoint failure, and eventually cell death upon cytokinesis. Taken together, these results, at least in part, provide a molecular basis to explain how Hec1 plays a crucial role for spindle checkpoint control and faithful chromosome segregation.
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Affiliation(s)
- Y-T Lin
- Department of Biological Chemistry, University of California, Irvine, CA 92697-4037, USA
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41
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Kong LJ, Meloni AR, Nevins JR. The Rb-related p130 protein controls telomere lengthening through an interaction with a Rad50-interacting protein, RINT-1. Mol Cell 2006; 22:63-71. [PMID: 16600870 DOI: 10.1016/j.molcel.2006.02.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2005] [Revised: 11/26/2005] [Accepted: 02/15/2006] [Indexed: 11/23/2022]
Abstract
The oncogenic process often leads to a loss of normal telomere length control, usually as a result of activation of telomerase. Nevertheless, there are also telomerase-independent events that involve a Rad50-dependent recombination mechanism to maintain telomere length. Previous work has implicated the Rb family of proteins in the control of telomere length, and we now demonstrate that the p130 member of the Rb family is critical for telomere length control. p130 interacts specifically with the RINT-1 protein, previously identified as a Rad50-interacting protein. We further show that RINT-1 is essential for telomere length control. We propose that p130, forming a complex with Rad50 through RINT-1, blocks telomerase-independent telomere lengthening in normal cells. Given previous work implicating E2F in the control of telomerase gene expression, these results thus point to complementary roles for the Rb/E2F pathway in the control of telomere length.
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Affiliation(s)
- Ling-Jie Kong
- Duke Institute for Genome Sciences and Policy, Duke University Medical Center, Durham, North Carolina 27708, USA
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42
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Arasaki K, Taniguchi M, Tani K, Tagaya M. RINT-1 regulates the localization and entry of ZW10 to the syntaxin 18 complex. Mol Biol Cell 2006; 17:2780-8. [PMID: 16571679 PMCID: PMC1474792 DOI: 10.1091/mbc.e05-10-0973] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
RINT-1 was first identified as a Rad50-interacting protein that participates in radiation-induced G2/M checkpoint control. We have recently reported that RINT-1, together with the dynamitin-interacting protein ZW10 and others, is associated with syntaxin 18, an endoplasmic reticulum (ER)-localized SNARE involved in membrane trafficking between the ER and Golgi. To address the role of RINT-1 in membrane trafficking, we examined the effects of overexpression and knockdown of RINT-1 on Golgi morphology and protein transport from the ER. Overexpression of the N-terminal region of RINT-1, which is responsible for the interaction with ZW10, caused redistribution of ZW10. Concomitantly, ER-to-Golgi transport was blocked and the Golgi was dispersed. Knockdown of RINT-1 also disrupted membrane trafficking between the ER and Golgi. Notably, silencing of RINT-1 resulted in a reduction in the amount of ZW10 associated with syntaxin 18, concomitant with ZW10 redistribution. In contrast, no redistribution or release of RINT-1 from the syntaxin 18 complex was observed when ZW10 expression was reduced. These results taken together suggest that RINT-1 coordinates the localization and function of ZW10 by serving as a link between ZW10 and the SNARE complex comprising syntaxin 18.
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Affiliation(s)
- Kohei Arasaki
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - May Taniguchi
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Katsuko Tani
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
| | - Mitsuo Tagaya
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo 192-0392, Japan
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43
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Kraynack BA, Chan A, Rosenthal E, Essid M, Umansky B, Waters MG, Schmitt HD. Dsl1p, Tip20p, and the novel Dsl3(Sec39) protein are required for the stability of the Q/t-SNARE complex at the endoplasmic reticulum in yeast. Mol Biol Cell 2005; 16:3963-77. [PMID: 15958492 PMCID: PMC1196311 DOI: 10.1091/mbc.e05-01-0056] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The "Dsl1p complex" in Saccharomyces cerevisiae, consisting of Dsl1p and Tip20p, is involved in Golgi-ER retrograde transport and it is functionally conserved from yeast to mammalian cells. To further characterize this complex, we analyzed the function of Dsl3p, a protein that interacts with Dsl1p in yeast two hybrids screens. DSL3, recently identified in a genome wide analysis of essential genes as SEC39, encodes a cytosolic protein of 82 kDa that is peripherally associated with membranes derived from the ER. There is strong genetic interaction between DSL3 and other factors required for Golgi-ER retrograde transport. Size exclusion chromatography and affinity purification approaches confirmed that Dsl3p is associated with subunits of the "Dsl1p complex." The complex also includes the Q/t-SNARE proteins, Use1p, Sec20p, and Ufe1p, integral membrane proteins that constitute the trimeric acceptor for R/v-SNAREs on Golgi-derived vesicles at the ER. Using mutants, we performed a detailed analysis of interactions between subunits of the Dsl1p complex and the ER-localized SNARE proteins. This analysis showed that both Dsl1p and Dsl3p are required for the stable interaction of the SNARE Use1p with a central subcomplex consisting of Tip20p and the SNARE proteins Ufe1p and Sec20p.
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Affiliation(s)
- Bryan A Kraynack
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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44
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Manzan A, Pfeiffer G, Hefferin ML, Lang CE, Carney JP, Hopfner KP. MlaA, a hexameric ATPase linked to the Mre11 complex in archaeal genomes. EMBO Rep 2004; 5:54-9. [PMID: 14710187 PMCID: PMC1298954 DOI: 10.1038/sj.embor.7400037] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2003] [Revised: 10/24/2003] [Accepted: 10/24/2003] [Indexed: 11/08/2022] Open
Abstract
We identify and characterize MlaA, a novel protein, which is found in a conserved operon with Mre11 and Rad50 in archaeal genomes. MlaA is fused with Mre11 in Methanobacter thermoautotrophicus, suggesting the MlaA is functionally linked to the Mre11 complex. MlaA preferentially and cooperatively binds double-stranded and secondary structure containing DNA and has double-stranded but not single-stranded DNA-stimulated ATPase activity. Electron microscopy reveals that MlaA forms a 360-kDa hexameric ring structure with a central hole. Our data suggest that the archaeal Mre11 complex is associated with a novel hexameric ATPase that could be required for the processing of DNA double-stranded breaks and recombination intermediates.
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Affiliation(s)
- Angelo Manzan
- Gene Center, University of Munich, D-81377 Munich, Germany
| | - Günter Pfeiffer
- Max-Planck-Institute for Biochemistry, D-82157 Martinsried, Germany
| | - Melissa L Hefferin
- Radiation Oncology Research Laboratory, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Cara E Lang
- Radiation Oncology Research Laboratory, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - James P Carney
- Radiation Oncology Research Laboratory, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Karl-Peter Hopfner
- Gene Center, University of Munich, D-81377 Munich, Germany
- Tel: +49 89 2180 76962; Fax: +49 89 2180 76999; E-mail:
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45
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Nakajima KI, Hirose H, Taniguchi M, Kurashina H, Arasaki K, Nagahama M, Tani K, Yamamoto A, Tagaya M. Involvement of BNIP1 in apoptosis and endoplasmic reticulum membrane fusion. EMBO J 2004; 23:3216-26. [PMID: 15272311 PMCID: PMC514507 DOI: 10.1038/sj.emboj.7600333] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2004] [Accepted: 06/24/2004] [Indexed: 01/29/2023] Open
Abstract
BNIP1, a member of the BH3-only protein family, was first discovered as one of the proteins that are capable of interacting with the antiapoptotic adenovirus E1B 19-kDa protein. Here we disclose a totally unexpected finding that BNIP1 is a component of the complex comprising syntaxin 18, an endoplasmic reticulum (ER)-located soluble N-ethylmaleimide-sensitive factor (NSF) attachment protein (SNAP) receptor (SNARE). Functional analysis revealed that BNIP1 participates in the formation of the ER network structure, but not in membrane trafficking between the ER and Golgi. Notably, a highly conserved leucine residue in the BH3 domain of BNIP1 plays an important role not only in the induction of apoptosis but also in the binding of alpha-SNAP, an adaptor that serves as a link between the chaperone ATPase NSF and SNAREs. This predicts that alpha-SNAP may suppress apoptosis by competing with antiapoptotic proteins for the BH3 domain of BNIP1. Indeed, overexpression of alpha-SNAP markedly delayed staurosporine-induced apoptosis. Our results shed light on possible crosstalk between apparently independent cellular events, apoptosis and ER membrane fusion.
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Affiliation(s)
- Ken-ichi Nakajima
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Hidenori Hirose
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Mei Taniguchi
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Hirofumi Kurashina
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Kohei Arasaki
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Masami Nagahama
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Katsuko Tani
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Akitsugu Yamamoto
- Department of Cell Biology, Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga, Japan
| | - Mitsuo Tagaya
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
- School of Life Sciences, Tokyo University of Pharmacy and Life Science, Horinouchi, Hachoiji, Tokyo 192-0392, Japan. Tel.: +81 426 77 7496; Fax: +81 426 76 8866; E-mail:
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46
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Dudás A, Chovanec M. DNA double-strand break repair by homologous recombination. Mutat Res 2004; 566:131-67. [PMID: 15164978 DOI: 10.1016/j.mrrev.2003.07.001] [Citation(s) in RCA: 145] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2003] [Revised: 07/29/2003] [Accepted: 07/30/2003] [Indexed: 01/06/2023]
Abstract
DNA double-strand breaks (DSB) are presumed to be the most deleterious DNA lesions as they disrupt both DNA strands. Homologous recombination (HR), single-strand annealing, and non-homologous end-joining are considered to be the pathways for repairing DSB. In this review, we focus on DSB repair by HR. The proteins involved in this process as well as the interactions among them are summarized and characterized. The main emphasis is on eukaryotic cells, particularly the budding yeast Saccharomyces cerevisiae and mammals. Only the RAD52 epistasis group proteins are included.
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Affiliation(s)
- Andrej Dudás
- Laboratory of Molecular Genetics, Cancer Research Institute, Slovak Academy of Sciences, Vlárska 7, 833 91 Bratislava 37, Slovak Republic
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47
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Zagaria A, Anelli L, Albano F, Storlazzi CT, Liso A, Roberti MG, Buquicchio C, Liso V, Rocchi M, Specchia G. A fluorescence in situ hybridization study of complex t(9;22) in two chronic myelocytic leukemia cases with a masked Philadelphia chromosome. ACTA ACUST UNITED AC 2004; 150:81-5. [PMID: 15041230 DOI: 10.1016/j.cancergencyto.2003.08.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2003] [Accepted: 08/22/2003] [Indexed: 11/19/2022]
Abstract
The t(9;22)(q34;q11) is evident in more than 90% of patients with chronic myelocytic leukemia (CML) and gives rise to the Philadelphia chromosome (Ph). Approximately 5%-10% of CML patients show variant translocations involving other chromosomes in addition to chromosomes 9 and 22. In some variant translocations, additional material is transferred on der(22), resulting in a masked Ph chromosome. In this paper, we report two apparently Ph-negative (Ph-) CML cases showing a t(7;9;22)(q22;q34;q11) and a t(8;9;22)(q12;q34;q11), respectively. A detailed molecular cytogenetic characterization was performed by fluorescence in situ hybridization (FISH), which disclosed the presence of the 5'BCR/3'ABL fusion gene on the der(7) and der(8) chromosomes, respectively. Derivative (22) appeared as a masked Ph chromosome in both cases. FISH analysis with appropriate BAC/PAC clones allowed us to precisely characterize the complex chromosomal rearrangements that were not detected by conventional cytogenetic analysis.
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MESH Headings
- Chromosomes, Human, Pair 22/genetics
- Chromosomes, Human, Pair 8/genetics
- Chromosomes, Human, Pair 9/genetics
- Fusion Proteins, bcr-abl/genetics
- Fusion Proteins, bcr-abl/metabolism
- Humans
- In Situ Hybridization, Fluorescence
- Karyotyping
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myeloid, Chronic, Atypical, BCR-ABL Negative/genetics
- Male
- Middle Aged
- Translocation, Genetic
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Affiliation(s)
- Antonella Zagaria
- Department of Hematology, University of Bari, Piazza Giulio Cesare 11, 70124 Bari, Italy
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48
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Hirose H, Arasaki K, Dohmae N, Takio K, Hatsuzawa K, Nagahama M, Tani K, Yamamoto A, Tohyama M, Tagaya M. Implication of ZW10 in membrane trafficking between the endoplasmic reticulum and Golgi. EMBO J 2004; 23:1267-78. [PMID: 15029241 PMCID: PMC381410 DOI: 10.1038/sj.emboj.7600135] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2003] [Accepted: 01/20/2004] [Indexed: 11/08/2022] Open
Abstract
ZW10, a dynamitin-interacting protein associated with kinetochores, is known to participate directly in turning off of the spindle checkpoint. In the present study, we show that ZW10 is located in the endoplasmic reticulum as well as in the cytosol during interphase, and forms a subcomplex with RINT-1 (Rad50-interacting protein) and p31 in a large complex comprising syntaxin 18, an endoplasmic reticulum-localized t-SNARE implicated in membrane trafficking. Like conventional syntaxin-binding proteins, ZW10, RINT-1 and p31 dissociated from syntaxin 18 upon Mg(2+)-ATP treatment in the presence of NSF and alpha-SNAP, whereas the subcomplex was not disassembled. Overexpression, microinjection and knockdown experiments revealed that ZW10 is involved in membrane trafficking between the endoplasmic reticulum and Golgi. The present results disclose an unexpected role for a spindle checkpoint protein, ZW10, during interphase.
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Affiliation(s)
- Hidenori Hirose
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Kohei Arasaki
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Division, RIKEN (The Institute of Physical and Chemical Research), Saitama, Japan
| | - Koji Takio
- Biomolecular Characterization Division, RIKEN (The Institute of Physical and Chemical Research), Saitama, Japan
| | - Kiyotaka Hatsuzawa
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Masami Nagahama
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Katsuko Tani
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
| | - Akitsugu Yamamoto
- Department of Cell Biology, Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga, Japan
| | - Masaya Tohyama
- Department of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Mitsuo Tagaya
- School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji, Tokyo, Japan
- School of Life Science, Tokyo University of Pharmacy and Life Science, Horinouchi Hachioji, Tokyo 192-0392, Japan. Tel.: +81 426 777496; Fax: +81 426 768866; E-mail:
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49
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Abstract
Spermatogenesis is a complex process that involves stem-cell renewal, genome reorganization and genome repackaging, and that culminates in the production of motile gametes. Problems at all stages of spermatogenesis contribute to human infertility, but few of them can be modelled in vitro or in cell culture. Targeted mutagenesis in the mouse provides a powerful method to analyse these steps and has provided new insights into the origins of male infertility.
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Affiliation(s)
- Howard J Cooke
- MRC Human Genetics Unit, Western General Hospital, Crewe Road, Edinburgh, EH4 2XU, UK.
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50
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Abstract
DNA double-strand break repair is a complex process that requires multiple enzymatic and structural activities to rejoin or repair the broken DNA ends using one of several repair pathways. These enzymatic and structural activities include end detection, end processing and alignment of DNA ends. Recent structural and functional studies of the DNA double-strand break repair factors Mre11/Rad50, Ku70/80 and Xrcc4 show how these enzymes combine and assemble both enzymatic and structural activities in DNA double-strand break repair.
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