1
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Dubois DJ, Chehade S, Marq JB, Venugopal K, Maco B, Puig ATI, Soldati-Favre D, Marion S. Toxoplasma gondii HOOK-FTS-HIP Complex is Critical for Secretory Organelle Discharge during Motility, Invasion, and Egress. mBio 2023; 14:e0045823. [PMID: 37093045 PMCID: PMC10294612 DOI: 10.1128/mbio.00458-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 03/24/2023] [Indexed: 04/25/2023] Open
Abstract
Members of the Apicomplexa phylum possess specialized secretory organelles that discharge, apically and in a timely regulated manner, key factors implicated in parasite motility, host cell invasion, egress and subversion of host cellular functions. The mechanisms regulating trafficking and apical docking of these secretory organelles are only partially elucidated. Here, we characterized two conserved endosomal trafficking regulators known to promote vesicle transport and/or fusion, HOOK and Fused Toes (FTS), in the context of organelle discharge in Toxoplasma gondii. TgHOOK and TgFTS form a complex with a coccidian-specific partner, named HOOK interacting partner (HIP). TgHOOK displays an apically enriched vesicular pattern and concentrates at the parasite apical tip where it colocalizes with TgFTS and TgHIP. Functional investigations revealed that TgHOOK is dispensable but fitness conferring. The protein regulates the apical positioning and secretion of micronemes and contributes to egress, motility, host cell attachment, and invasion. Conditional depletion of TgFTS or TgHIP impacted on the same processes but led to more severe phenotypes. This study provides evidence of endosomal trafficking regulators involved in the apical exocytosis of micronemes and possibly as a consequence or directly on the discharge of the rhoptries. IMPORTANCE Toxoplasma gondii affects between 30 and 80% of the human population, poses a life-threatening risk to immunocompromised individuals, and is a cause of abortion and birth defects following congenital transmission. T. gondii belongs to the phylum of Apicomplexa characterized by a set of unique apical secretory organelles called the micronemes and rhoptries. Upon host cell recognition, this obligatory intracellular parasite secretes specific effectors contained in micronemes and rhoptries to promote parasite invasion of host cells and subsequent persistence. Here, we identified novel T. gondii endosomal trafficking regulators and demonstrated that they regulate microneme organelle apical positioning and exocytosis, thereby strongly contributing to host cell invasion and parasite virulence.
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Affiliation(s)
- David J. Dubois
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva, Switzerland
| | - Sylia Chehade
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
| | - Jean-Baptiste Marq
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva, Switzerland
| | - Kannan Venugopal
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
- Wellcome Centre for Integrative Parasitology, Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Bohumil Maco
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva, Switzerland
| | - Albert Tell I. Puig
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva, Switzerland
| | - Dominique Soldati-Favre
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva, Switzerland
| | - Sabrina Marion
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019—UMR 9017—CIIL—Center for Infection and Immunity of Lille, Lille, France
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2
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Haley CO, Waters AM, Bader DM. Malformations in the Murine Kidney Caused by Loss of CENP-F Function. Anat Rec (Hoboken) 2020; 302:163-170. [PMID: 30408335 DOI: 10.1002/ar.24018] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/14/2018] [Accepted: 02/21/2018] [Indexed: 01/27/2023]
Abstract
Centromere-binding protein F (CENP-F) is a large and complex protein shown to play critical roles in mitosis and various other interphase functions. Previous studies have shown that the disruption of CENP-F function leads to detrimental effects on human development. Still, it is important to note the lack of studies focusing on the effects that the loss of this essential protein may have on specific adult organs. In the current study, we used a novel global knockout murine model to analyze the potential consequences deletion of CENP-F has on adult kidney structure and function. We discovered several structural abnormalities including loss of ciliary structure, tubule dilation, and disruption of the glomerulus. Along with these structural irregularities, renal dysfunction was also detected suggesting hydronephrosis and acute kidney injury in these knockout organs. Importantly, this is the first study linking CENP-F to kidney disease and hopefully these data will serve as a platform to further investigate the molecular mechanisms disrupted in the kidney by the loss of CENP-F. Anat Rec, 302:163-170, 2019. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Chanell O Haley
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
| | - Aoife M Waters
- Institute of Child Health, University College, London, UK.,Department of Nephrology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - D M Bader
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, Tennessee
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3
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Kakiuchi A, Kohno T, Kakuki T, Kaneko Y, Konno T, Hosaka Y, Hata T, Kikuchi S, Ninomiya T, Himi T, Takano K, Kojima T. Rho-kinase and PKCα Inhibition Induces Primary Cilia Elongation and Alters the Behavior of Undifferentiated and Differentiated Temperature-sensitive Mouse Cochlear Cells. J Histochem Cytochem 2019; 67:523-535. [PMID: 30917058 DOI: 10.1369/0022155419841013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Primary cilia, regulated via distinct signal transduction pathways, play crucial roles in various cellular behaviors. However, the full regulatory mechanism involved in primary cilia development during cellular differentiation is not fully understood, particularly for the sensory hair cells of the mammalian cochlea. In this study, we investigated the effects of the Rho-kinase inhibitor Y27632 and PKCα inhibitor GF109203X on primary cilia-related cell behavior in undifferentiated and differentiated temperature-sensitive mouse cochlear precursor hair cells (the conditionally immortalized US/VOT-E36 cell line). Our results indicate that treatment with Y27632 or GF109203X induced primary cilia elongation and tubulin acetylation in both differentiated and undifferentiated cells. Concomitant with cilia elongation, Y27632 treatment also increased Hook2 and cyclinD1 expression, while only Hook2 expression was increased after treatment with GF109203X. In the undifferentiated cells, we observed an increase in the number of S and G2/M stage cells and a decrease of G1 cells after treatment with Y27632, while the opposite was observed after treatment with GF109203X. Finally, while both treatments decreased oxidative stress, only treatment with Y27632, not GF109203X, induced cell cycle-dependent cell proliferation and cell migration.
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Affiliation(s)
- Akito Kakiuchi
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan.,Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takayuki Kohno
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takuya Kakuki
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yakuto Kaneko
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan.,Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takumi Konno
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yukino Hosaka
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tomohiro Hata
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Shin Kikuchi
- Department of Anatomy, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takafumi Ninomiya
- Department of Anatomy, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tetsuo Himi
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Kenichi Takano
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takashi Kojima
- Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
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4
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Abstract
Cytoplasmic dynein-1 (hereafter dynein) is an essential cellular motor that drives the movement of diverse cargos along the microtubule cytoskeleton, including organelles, vesicles and RNAs. A long-standing question is how a single form of dynein can be adapted to a wide range of cellular functions in both interphase and mitosis. Recent progress has provided new insights - dynein interacts with a group of activating adaptors that provide cargo-specific and/or function-specific regulation of the motor complex. Activating adaptors such as BICD2 and Hook1 enhance the stability of the complex that dynein forms with its required activator dynactin, leading to highly processive motility toward the microtubule minus end. Furthermore, activating adaptors mediate specific interactions of the motor complex with cargos such as Rab6-positive vesicles or ribonucleoprotein particles for BICD2, and signaling endosomes for Hook1. In this Cell Science at a Glance article and accompanying poster, we highlight the conserved structural features found in dynein activators, the effects of these activators on biophysical parameters, such as motor velocity and stall force, and the specific intracellular functions they mediate.
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Affiliation(s)
- Mara A Olenick
- University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Erika L F Holzbaur
- University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
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5
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Dwivedi D, Chawla P, Sharma M. Incorporating Motility in the Motor: Role of the Hook Protein Family in Regulating Dynein Motility. Biochemistry 2019; 58:1026-1031. [PMID: 30702276 DOI: 10.1021/acs.biochem.8b01065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Cytoplasmic dynein is a retrograde microtubule-based motor transporting cellular cargo, including organelles, vesicular intermediates, RNA granules, and proteins, thus regulating their subcellular distribution and function. Mammalian dynein associates with dynactin, a multisubunit protein complex that is necessary for the processive motility of dynein along the microtubule tracks. Recent studies have shown that the interaction between dynein and dynactin is enhanced in the presence of a coiled-coil activating adaptor protein, which performs dual functions of recruiting dynein and dynactin to their cargoes and inducing the superprocessive motility of the motor complex. One such family of coiled-coil activating adaptor proteins is the Hook family of proteins that are conserved across evolution with three paralogs in the case of mammals, namely, HOOK1-HOOK3. This Perspective aims to provide an overview of the Hook protein structure and the cellular functions of Hook proteins, with an emphasis on the recent developments in understanding their role as activating dynein adaptors.
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Affiliation(s)
- Devashish Dwivedi
- Department of Biological Sciences , Indian Institute of Science Education and Research (IISER) , Mohali , Punjab 140306 , India
| | - Prateek Chawla
- Department of Biological Sciences , Indian Institute of Science Education and Research (IISER) , Mohali , Punjab 140306 , India
| | - Mahak Sharma
- Department of Biological Sciences , Indian Institute of Science Education and Research (IISER) , Mohali , Punjab 140306 , India
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6
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Dwivedi D, Kumari A, Rathi S, Mylavarapu SVS, Sharma M. The dynein adaptor Hook2 plays essential roles in mitotic progression and cytokinesis. J Cell Biol 2019; 218:871-894. [PMID: 30674580 PMCID: PMC6400558 DOI: 10.1083/jcb.201804183] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 10/29/2018] [Accepted: 12/07/2018] [Indexed: 12/16/2022] Open
Abstract
Hook proteins are evolutionarily conserved dynein adaptors that promote assembly of highly processive dynein-dynactin motor complexes. Mammals express three Hook paralogs, namely Hook1, Hook2, and Hook3, that have distinct subcellular localizations and expectedly, distinct cellular functions. Here we demonstrate that Hook2 binds to and promotes dynein-dynactin assembly specifically during mitosis. During the late G2 phase, Hook2 mediates dynein-dynactin localization at the nuclear envelope (NE), which is required for centrosome anchoring to the NE. Independent of its binding to dynein, Hook2 regulates microtubule nucleation at the centrosome; accordingly, Hook2-depleted cells have reduced astral microtubules and spindle positioning defects. Besides the centrosome, Hook2 localizes to and recruits dynactin and dynein to the central spindle. Dynactin-dependent targeting of centralspindlin complex to the midzone is abrogated upon Hook2 depletion; accordingly, Hook2 depletion results in cytokinesis failure. We find that the zebrafish Hook2 homologue promotes dynein-dynactin association and was essential for zebrafish early development. Together, these results suggest that Hook2 mediates assembly of the dynein-dynactin complex and regulates mitotic progression and cytokinesis.
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Affiliation(s)
- Devashish Dwivedi
- Department of Biological Sciences, Indian Institute of Science Education and Research, Mohali, India
| | - Amrita Kumari
- Laboratory of Cellular Dynamics, Regional Centre for Biotechnology, Faridabad, India.,Affiliated to Manipal Academy of Higher Education, Manipal, India
| | - Siddhi Rathi
- Department of Biological Sciences, Indian Institute of Science Education and Research, Mohali, India
| | - Sivaram V S Mylavarapu
- Laboratory of Cellular Dynamics, Regional Centre for Biotechnology, Faridabad, India.,Affiliated to Manipal Academy of Higher Education, Manipal, India
| | - Mahak Sharma
- Department of Biological Sciences, Indian Institute of Science Education and Research, Mohali, India
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7
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Olenick MA, Dominguez R, Holzbaur ELF. Dynein activator Hook1 is required for trafficking of BDNF-signaling endosomes in neurons. J Cell Biol 2019; 218:220-233. [PMID: 30373907 PMCID: PMC6314548 DOI: 10.1083/jcb.201805016] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 09/18/2018] [Accepted: 10/15/2018] [Indexed: 01/16/2023] Open
Abstract
Axonal transport is required for neuronal development and survival. Transport from the axon to the soma is driven by the molecular motor cytoplasmic dynein, yet it remains unclear how dynein is spatially and temporally regulated. We find that the dynein effector Hook1 mediates transport of TrkB-BDNF-signaling endosomes in primary hippocampal neurons. Hook1 comigrates with a subpopulation of Rab5 endosomes positive for TrkB and BDNF, which exhibit processive retrograde motility with faster velocities than the overall Rab5 population. Knockdown of Hook1 significantly reduced the motility of BDNF-signaling endosomes without affecting the motility of other organelles. In microfluidic chambers, Hook1 depletion resulted in a significant decrease in the flux and processivity of BDNF-Qdots along the mid-axon, an effect specific for Hook1 but not Hook3. Hook1 depletion inhibited BDNF trafficking to the soma and blocked downstream BDNF- and TrkB-dependent signaling to the nucleus. Together, these studies support a model in which differential association with cargo-specific effectors efficiently regulates dynein in neurons.
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Affiliation(s)
- Mara A Olenick
- The Pennsylvania Muscle Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA
| | - Roberto Dominguez
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- The Pennsylvania Muscle Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Erika L F Holzbaur
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- The Pennsylvania Muscle Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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8
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Abstract
In metazoans, the assembly of kinetochores on centrometric chromatin and the dismantling of nuclear pore complexes are processes that have to be tightly coordinated to ensure the proper assembly of the mitotic spindle and a successful mitosis. It is therefore noteworthy that these two macromolecular assemblies share a subset of constituents. One of these multifaceted components is Cenp-F, a protein implicated in cancer and developmental pathologies. During the cell cycle, Cenp-F localizes in multiple cellular structures including the nuclear envelope in late G2/early prophase and kinetochores throughout mitosis. We recently characterized the molecular determinants of Cenp-F interaction with Nup133, a structural nuclear pore constituent. In parallel with two other independent studies, we further elucidated the mechanisms governing Cenp-F kinetochore recruitment that mainly relies on its interaction with Bub1, with redundant contribution of Cenp-E upon acute microtubule depolymerisation. Here we synthesize the current literature regarding the dual location of Cenp-F at nuclear pores and kinetochores and extend our discussion to the regulation of these NPC and kinetochore localizations by mitotic kinase and spindle microtubules.
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Affiliation(s)
- Alessandro Berto
- a Institut Jacques Monod , UMR7592, CNRS, Université Paris Diderot, Sorbonne Paris Cité , Paris , France.,b Ecole Doctorale Structure et Dynamique des Systèmes Vivants (#577) , Univ Paris Sud, Université Paris-Saclay , Orsay , France
| | - Valérie Doye
- a Institut Jacques Monod , UMR7592, CNRS, Université Paris Diderot, Sorbonne Paris Cité , Paris , France
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9
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Loss of CENP-F Results in Dilated Cardiomyopathy with Severe Disruption of Cardiac Myocyte Architecture. Sci Rep 2018; 8:7546. [PMID: 29765066 PMCID: PMC5953941 DOI: 10.1038/s41598-018-25774-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 04/27/2018] [Indexed: 12/14/2022] Open
Abstract
Centromere-binding protein F (CENP-F) is a very large and complex protein with many and varied binding partners including components of the microtubule network. Numerous CENP-F functions impacting diverse cellular behaviors have been identified. Importantly, emerging data have shown that CENP-F loss- or gain-of-function has critical effects on human development and disease. Still, it must be noted that data at the single cardiac myocyte level examining the impact of CENP-F loss-of-function on fundamental cellular behavior is missing. To address this gap in our knowledge, we analyzed basic cell structure and function in cardiac myocytes devoid of CENP-F. We found many diverse structural abnormalities including disruption of the microtubule network impacting critical characteristics of the cardiac myocyte. This is the first report linking microtubule network malfunction to cardiomyopathy. Importantly, we also present data demonstrating a direct link between a CENP-F single nucleotide polymorphism (snp) and human cardiac disease. In a proximate sense, these data examining CENP-F function explain the cellular basis underlying heart disease in this genetic model and, in a larger sense, they will hopefully provide a platform upon which the field can explore diverse cellular outcomes in wide-ranging areas of research on this critical protein.
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10
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Berto A, Yu J, Morchoisne-Bolhy S, Bertipaglia C, Vallee R, Dumont J, Ochsenbein F, Guerois R, Doye V. Disentangling the molecular determinants for Cenp-F localization to nuclear pores and kinetochores. EMBO Rep 2018; 19:embr.201744742. [PMID: 29632243 DOI: 10.15252/embr.201744742] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 03/02/2018] [Accepted: 03/08/2018] [Indexed: 11/09/2022] Open
Abstract
Cenp-F is a multifaceted protein implicated in cancer and developmental pathologies. The Cenp-F C-terminal region contains overlapping binding sites for numerous proteins that contribute to its functions throughout the cell cycle. Here, we focus on the nuclear pore protein Nup133 that interacts with Cenp-F both at nuclear pores in prophase and at kinetochores in mitosis, and on the kinase Bub1, known to contribute to Cenp-F targeting to kinetochores. By combining in silico structural modeling and yeast two-hybrid assays, we generate an interaction model between a conserved helix within the Nup133 β-propeller and a short leucine zipper-containing dimeric segment of Cenp-F. We thereby create mutants affecting the Nup133/Cenp-F interface and show that they prevent Cenp-F localization to the nuclear envelope, but not to kinetochores. Conversely, a point mutation within an adjacent leucine zipper affecting the kinetochore targeting of Cenp-F KT-core domain impairs its interaction with Bub1, but not with Nup133, identifying Bub1 as the direct KT-core binding partner of Cenp-F. Finally, we show that Cenp-E redundantly contributes together with Bub1 to the recruitment of Cenp-F to kinetochores.
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Affiliation(s)
- Alessandro Berto
- Institut Jacques Monod, UMR7592, CNRS, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,Ecole Doctorale Structure et Dynamique des Systèmes Vivants (#577), Univ Paris Sud, Université Paris-Saclay, Orsay, France
| | - Jinchao Yu
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris Sud, Université Paris-Saclay, Gif sur Yvette, France
| | | | - Chiara Bertipaglia
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA
| | - Richard Vallee
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA
| | - Julien Dumont
- Institut Jacques Monod, UMR7592, CNRS, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Francoise Ochsenbein
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris Sud, Université Paris-Saclay, Gif sur Yvette, France
| | - Raphael Guerois
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris Sud, Université Paris-Saclay, Gif sur Yvette, France
| | - Valérie Doye
- Institut Jacques Monod, UMR7592, CNRS, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
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11
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Kanfer G, Peterka M, Arzhanik VK, Drobyshev AL, Ataullakhanov FI, Volkov VA, Kornmann B. CENP-F couples cargo to growing and shortening microtubule ends. Mol Biol Cell 2017; 28:2400-2409. [PMID: 28701340 PMCID: PMC5576903 DOI: 10.1091/mbc.e16-11-0756] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 06/20/2017] [Accepted: 06/27/2017] [Indexed: 12/03/2022] Open
Abstract
Unlike canonical transport, in which cargo is attached to molecular motors, CENP-F promotes the transport of cargoes such as mitochondria by directly attaching them to the tips of growing and shrinking microtubules. Dynamic microtubule ends exert pulling and pushing forces on intracellular membranes and organelles. However, the mechanical linkage of microtubule tips to their cargoes is poorly understood. CENP-F is a nonmotor microtubule-binding protein that participates in microtubule binding at kinetochores and in the mitotic redistribution of the mitochondrial network. CENP-F–driven mitochondrial transport is linked to growing microtubule tips, but the underlying molecular mechanisms are unknown. Here we show that CENP-F tracks growing microtubule ends in living cells. In vitro reconstitution demonstrates that microtubule tips can transport mitochondria and CENP-F–coated artificial cargoes over micrometer-long distances during both growing and shrinking phases. Based on these and previous observations, we suggest that CENP-F might act as a transporter of mitochondria and other cellular cargoes by attaching them to dynamic microtubule ends during both polymerization and depolymerization of tubulin.
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Affiliation(s)
- Gil Kanfer
- Institute of Biochemistry, ETH Zurich, ZH 8093 Zurich, Switzerland
| | - Martin Peterka
- Institute of Biochemistry, ETH Zurich, ZH 8093 Zurich, Switzerland
| | - Vladimir K Arzhanik
- Department of Bioengineering and Bioinformatics, Moscow State University, 119991 Moscow, Russia
| | - Alexei L Drobyshev
- Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Fazly I Ataullakhanov
- Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Vladimir A Volkov
- Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Benoît Kornmann
- Institute of Biochemistry, ETH Zurich, ZH 8093 Zurich, Switzerland
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12
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Schroeder CM, Vale RD. Assembly and activation of dynein-dynactin by the cargo adaptor protein Hook3. J Cell Biol 2017; 214:309-18. [PMID: 27482052 PMCID: PMC4970328 DOI: 10.1083/jcb.201604002] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 07/07/2016] [Indexed: 11/22/2022] Open
Abstract
Metazoan dynein moves processively with the aid of dynactin and the endosomal cargo adaptor Hook3. A structure–function study of Hook3 reveals how it assembles dynein with dynactin and suggests that an additional step of allosteric activation is required beyond complex assembly. Metazoan cytoplasmic dynein moves processively along microtubules with the aid of dynactin and an adaptor protein that joins dynein and dynactin into a stable ternary complex. Here, we examined how Hook3, a cargo adaptor involved in Golgi and endosome transport, forms a motile dynein–dynactin complex. We show that the conserved Hook domain interacts directly with the dynein light intermediate chain 1 (LIC1). By solving the crystal structure of the Hook domain and using structure-based mutagenesis, we identify two conserved surface residues that are each critical for LIC1 binding. Hook proteins with mutations in these residues fail to form a stable dynein–dynactin complex, revealing a crucial role for LIC1 in this interaction. We also identify a region of Hook3 specifically required for an allosteric activation of processive motility. Our work reveals the structural details of Hook3’s interaction with dynein and offers insight into how cargo adaptors form processive dynein–dynactin motor complexes.
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Affiliation(s)
- Courtney M Schroeder
- The Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158 Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94158
| | - Ronald D Vale
- The Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158 Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94158
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13
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Yim H, Shin SB, Woo SU, Lee PCW, Erikson RL. Plk1-mediated stabilization of 53BP1 through USP7 regulates centrosome positioning to maintain bipolarity. Oncogene 2017; 36:966-978. [PMID: 27477698 DOI: 10.1038/onc.2016.263] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 06/04/2016] [Accepted: 06/16/2016] [Indexed: 12/22/2022]
Abstract
Although 53BP1 has been established well as a mediator in DNA damage response, its function in mitosis is not clearly understood. We found that 53BP1 is a mitotic-binding partner of the kinases Plk1 and AuroraA, and that the binding with Plk1 increases the stability of 53BP1 by accelerating its interaction with the deubiquitinase USP7. Depletion of 53BP1 induces mitotic defects such as chromosomal missegregation, misorientation of spindle poles and the generation of extra centrosomes, which is similar phenotype to USP7-knockdown cells. In addition, 53BP1 depletion reduces the levels of p53 and centromere protein F (CENPF), interacting proteins of 53BP1. These phenotypes induced by 53BP1 depletion were rescued by expression of wild-type or phosphomimic mutant 53BP1 but not by expression of a dephosphomimic mutant. We propose that phosphorylation of 53BP1 at S380 accelerates complex formation with USP7 and CENPF to regulate their stability, thus having a crucial role in proper centrosome positioning, chromosomal alignment, and centrosome number.
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Affiliation(s)
- H Yim
- Department of Pharmacy, College of Pharmacy, Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Gyeonggi-do, Korea
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, USA
| | - S-B Shin
- Department of Pharmacy, College of Pharmacy, Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Gyeonggi-do, Korea
| | - S U Woo
- Department of Pharmacy, College of Pharmacy, Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Gyeonggi-do, Korea
| | - P C-W Lee
- Department of Biomedical Sciences, Cell Dysfunction Research Center (CDRC), University of Ulsan College of Medicine, Seoul, Korea
| | - R L Erikson
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, USA
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14
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Pallesi-Pocachard E, Bazellieres E, Viallat-Lieutaud A, Delgrossi MH, Barthelemy-Requin M, Le Bivic A, Massey-Harroche D. Hook2, a microtubule-binding protein, interacts with Par6α and controls centrosome orientation during polarized cell migration. Sci Rep 2016; 6:33259. [PMID: 27624926 PMCID: PMC5021942 DOI: 10.1038/srep33259] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 08/23/2016] [Indexed: 12/12/2022] Open
Abstract
Polarity protein complexes function during polarized cell migration and a subset of these proteins localizes to the reoriented centrosome during this process. Despite these observations, the mechanisms behind the recruitment of these polarity complexes such as the aPKC/PAR6α complex to the centrosome are not well understood. Here we identify Hook2 as an interactor for the aPKC/PAR6α complex that functions to localize this complex at the centrosome. We first demonstrate that Hook2 is essential for the polarized Golgi re-orientation towards the migration front. Depletion of Hook2 results in a decrease of PAR6α at the centrosome during cell migration, while overexpression of Hook2 in cells induced the formation of aggresomes with the recruitment of PAR6α, aPKC and PAR3. In addition, we demonstrate that the interaction between the C-terminal domain of Hook2 and the aPKC-binding domain of PAR6α localizes PAR6α to the centrosome during cell migration. Our data suggests that Hook2, a microtubule binding protein, plays an important role in the regulation of PAR6α recruitment to the centrosome to bridge microtubules and the aPKC/PAR complex. This data reveals how some of the polarity protein complexes are recruited to the centrosome and might regulate pericentriolar and microtubule organization and potentially impact on polarized migration.
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Affiliation(s)
- Emilie Pallesi-Pocachard
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
| | - Elsa Bazellieres
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
| | - Annelise Viallat-Lieutaud
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
| | - Marie-Hélène Delgrossi
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
| | - Magali Barthelemy-Requin
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
| | - André Le Bivic
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
| | - Dominique Massey-Harroche
- Aix-Marseille Univ, CNRS, UMR 7288, Developmental Biology Institute of Marseille (IBDM), case 907, 13288 Marseille, cedex 09, France
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15
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Pfaltzgraff ER, Roth GM, Miller PM, Gintzig AG, Ohi R, Bader DM. Loss of CENP-F results in distinct microtubule-related defects without chromosomal abnormalities. Mol Biol Cell 2016; 27:1990-9. [PMID: 27146114 PMCID: PMC4927273 DOI: 10.1091/mbc.e15-12-0848] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 04/27/2016] [Indexed: 01/09/2023] Open
Abstract
Microtubule (MT)-binding centromere protein F (CENP-F) was previously shown to play a role exclusively in chromosome segregation during cellular division. Many cell models of CENP-F depletion show a lag in the cell cycle and aneuploidy. Here, using our novel genetic deletion model, we show that CENP-F also regulates a broader range of cellular functions outside of cell division. We characterized CENP-F(+/+) and CENP-F(-/-) mouse embryonic fibroblasts (MEFs) and found drastic differences in multiple cellular functions during interphase, including cell migration, focal adhesion dynamics, and primary cilia formation. We discovered that CENP-F(-/-) MEFs have severely diminished MT dynamics, which underlies the phenotypes we describe. These data, combined with recent biochemical research demonstrating the strong binding of CENP-F to the MT network, support the conclusion that CENP-F is a powerful regulator of MT dynamics during interphase and affects heterogeneous cell functions.
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Affiliation(s)
- Elise R Pfaltzgraff
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, TN 37232
| | - Gretchen M Roth
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, TN 37232
| | - Paul M Miller
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, TN 37232
| | - Anneelizabeth G Gintzig
- Division of Hematology-Oncology, Department of Pediatrics, Vanderbilt University, Nashville, TN 37232
| | - Ryoma Ohi
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232
| | - David M Bader
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University, Nashville, TN 37232
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16
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Volkov VA, Grissom PM, Arzhanik VK, Zaytsev AV, Renganathan K, McClure-Begley T, Old WM, Ahn N, McIntosh JR. Centromere protein F includes two sites that couple efficiently to depolymerizing microtubules. J Cell Biol 2015; 209:813-28. [PMID: 26101217 PMCID: PMC4477864 DOI: 10.1083/jcb.201408083] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Both N- and C-terminal microtubule (MT)-binding domains of CENP-F can follow depolymerizing MT ends while bearing a significant load, and the N-terminal domain prefers binding to curled oligomers of tubulin relative to MT walls by approximately fivefold, suggesting that CENP-F may play a role in the firm bonds that form between kinetochores and the flared plus ends of dynamic MTs. Firm attachments between kinetochores and dynamic spindle microtubules (MTs) are important for accurate chromosome segregation. Centromere protein F (CENP-F) has been shown to include two MT-binding domains, so it may participate in this key mitotic process. Here, we show that the N-terminal MT-binding domain of CENP-F prefers curled oligomers of tubulin relative to MT walls by approximately fivefold, suggesting that it may contribute to the firm bonds between kinetochores and the flared plus ends of dynamic MTs. A polypeptide from CENP-F’s C terminus also bound MTs, and either protein fragment diffused on a stable MT wall. They also followed the ends of dynamic MTs as they shortened. When either fragment was coupled to a microbead, the force it could transduce from a shortening MT averaged 3–5 pN but could exceed 10 pN, identifying CENP-F as a highly effective coupler to shortening MTs.
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Affiliation(s)
- Vladimir A Volkov
- Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences, Moscow, Russia, 119991 Laboratory of Biophysics, Federal Research Center of Pediatric Hematology, Oncology and Immunology, Moscow, Russia, 117513 N. F. Gamaleya Research Institute for Epidemiology and Microbiology, Moscow, Russia, 123098
| | - Paula M Grissom
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309
| | - Vladimir K Arzhanik
- Department of Bioengineering and Bioinformatics, Moscow State University, Moscow, Russia, 119991
| | - Anatoly V Zaytsev
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Kutralanathan Renganathan
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309
| | - Tristan McClure-Begley
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309
| | - William M Old
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309
| | - Natalie Ahn
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309
| | - J Richard McIntosh
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309
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17
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Herrmann L, Wiegmann C, Arsalan-Werner A, Hilbrich I, Jäger C, Flach K, Suttkus A, Lachmann I, Arendt T, Holzer M. Hook proteins: association with Alzheimer pathology and regulatory role of hook3 in amyloid beta generation. PLoS One 2015; 10:e0119423. [PMID: 25799409 PMCID: PMC4370497 DOI: 10.1371/journal.pone.0119423] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 01/13/2015] [Indexed: 11/20/2022] Open
Abstract
Defects in intracellular transport are implicated in the pathogenesis of Alzheimer’s disease (AD). Hook proteins are a family of cytoplasmic linker proteins that participate in endosomal transport. In this study we show that Hook1 and Hook3 are expressed in neurons while Hook2 is predominantly expressed in astrocytes. Furthermore, Hook proteins are associated with pathological hallmarks in AD; Hook1 and Hook3 are localized to tau aggregates and Hook2 to glial components within amyloid plaques. Additionally, the expression of Hook3 is reduced in AD. Modelling of Hook3 deficiency in cultured cells leads to slowing of endosomal transport and increases β-amyloid production. We propose that Hook3 plays a role in pathogenic events exacerbating AD.
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Affiliation(s)
- Lydia Herrmann
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Caspar Wiegmann
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Annika Arsalan-Werner
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Isabel Hilbrich
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Carsten Jäger
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Katharina Flach
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Anne Suttkus
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | | | - Thomas Arendt
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
| | - Max Holzer
- Paul Flechsig Institute of Brain Research, Department of Molecular and Cellular Mechanism of Neurodegeneration, University of Leipzig, Leipzig, Germany
- * E-mail:
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18
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Liu Y, DeBoer K, de Kretser DM, O’Donnell L, O’Connor AE, Merriner DJ, Okuda H, Whittle B, Jans DA, Efthymiadis A, McLachlan RI, Ormandy CJ, Goodnow CC, Jamsai D, O’Bryan MK. LRGUK-1 is required for basal body and manchette function during spermatogenesis and male fertility. PLoS Genet 2015; 11:e1005090. [PMID: 25781171 PMCID: PMC4363142 DOI: 10.1371/journal.pgen.1005090] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 02/23/2015] [Indexed: 12/23/2022] Open
Abstract
Male infertility affects at least 5% of reproductive age males. The most common pathology is a complex presentation of decreased sperm output and abnormal sperm shape and motility referred to as oligoasthenoteratospermia (OAT). For the majority of OAT men a precise diagnosis cannot be provided. Here we demonstrate that leucine-rich repeats and guanylate kinase-domain containing isoform 1 (LRGUK-1) is required for multiple aspects of sperm assembly, including acrosome attachment, sperm head shaping and the initiation of the axoneme growth to form the core of the sperm tail. Specifically, LRGUK-1 is required for basal body attachment to the plasma membrane, the appropriate formation of the sub-distal appendages, the extension of axoneme microtubules and for microtubule movement and organisation within the manchette. Manchette dysfunction leads to abnormal sperm head shaping. Several of these functions may be achieved in association with the LRGUK-1 binding partner HOOK2. Collectively, these data establish LRGUK-1 as a major determinant of microtubule structure within the male germ line.
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Affiliation(s)
- Yan Liu
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
| | - Kathleen DeBoer
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
| | - David M. de Kretser
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
| | - Liza O’Donnell
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
- MIMR-PHI Institute of Medical Research, Monash Medical Centre, Clayton, Australia
| | - Anne E. O’Connor
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
| | - D. Jo Merriner
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
| | - Hidenobu Okuda
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
- Department of Urology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Belinda Whittle
- Australian Phenomics Facility, The Australian National University, Canberra, Australia
| | - David A. Jans
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Athina Efthymiadis
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Robert I. McLachlan
- MIMR-PHI Institute of Medical Research, Monash Medical Centre, Clayton, Australia
| | - Christopher J. Ormandy
- The Garvan Institute of Medical Research and St. Vincent’s Hospital Clinical School, UNSW Australia, Sydney, Australia
| | - Chris C. Goodnow
- Australian Phenomics Facility, The Australian National University, Canberra, Australia
| | - Duangporn Jamsai
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
| | - Moira K. O’Bryan
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Australia
- * E-mail:
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19
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Waters AM, Asfahani R, Carroll P, Bicknell L, Lescai F, Bright A, Chanudet E, Brooks A, Christou-Savina S, Osman G, Walsh P, Bacchelli C, Chapgier A, Vernay B, Bader DM, Deshpande C, O' Sullivan M, Ocaka L, Stanescu H, Stewart HS, Hildebrandt F, Otto E, Johnson CA, Szymanska K, Katsanis N, Davis E, Kleta R, Hubank M, Doxsey S, Jackson A, Stupka E, Winey M, Beales PL. The kinetochore protein, CENPF, is mutated in human ciliopathy and microcephaly phenotypes. J Med Genet 2015; 52:147-56. [PMID: 25564561 PMCID: PMC4345935 DOI: 10.1136/jmedgenet-2014-102691] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/26/2014] [Accepted: 11/27/2014] [Indexed: 12/02/2022]
Abstract
BACKGROUND Mutations in microtubule-regulating genes are associated with disorders of neuronal migration and microcephaly. Regulation of centriole length has been shown to underlie the pathogenesis of certain ciliopathy phenotypes. Using a next-generation sequencing approach, we identified mutations in a novel centriolar disease gene in a kindred with an embryonic lethal ciliopathy phenotype and in a patient with primary microcephaly. METHODS AND RESULTS Whole exome sequencing data from a non-consanguineous Caucasian kindred exhibiting mid-gestation lethality and ciliopathic malformations revealed two novel non-synonymous variants in CENPF, a microtubule-regulating gene. All four affected fetuses showed segregation for two mutated alleles [IVS5-2A>C, predicted to abolish the consensus splice-acceptor site from exon 6; c.1744G>T, p.E582X]. In a second unrelated patient exhibiting microcephaly, we identified two CENPF mutations [c.1744G>T, p.E582X; c.8692 C>T, p.R2898X] by whole exome sequencing. We found that CENP-F colocalised with Ninein at the subdistal appendages of the mother centriole in mouse inner medullary collecting duct cells. Intraflagellar transport protein-88 (IFT-88) colocalised with CENP-F along the ciliary axonemes of renal epithelial cells in age-matched control human fetuses but did not in truncated cilia of mutant CENPF kidneys. Pairwise co-immunoprecipitation assays of mitotic and serum-starved HEKT293 cells confirmed that IFT88 precipitates with endogenous CENP-F. CONCLUSIONS Our data identify CENPF as a new centriolar disease gene implicated in severe human ciliopathy and microcephaly related phenotypes. CENP-F has a novel putative function in ciliogenesis and cortical neurogenesis.
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Affiliation(s)
- Aoife M Waters
- Institute of Child Health, University College London, London, UK Department of Nephrology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - Rowan Asfahani
- Institute of Child Health, University College London, London, UK
| | - Paula Carroll
- Institute of Genetics & Molecular Medicine, Edinburgh, UK
| | | | - Francesco Lescai
- Institute of Child Health, University College London, London, UK
| | | | - Estelle Chanudet
- Institute of Child Health, University College London, London, UK
| | - Anthony Brooks
- Institute of Child Health, University College London, London, UK
| | | | - Guled Osman
- Institute of Child Health, University College London, London, UK
| | - Patrick Walsh
- Institute of Child Health, University College London, London, UK
| | - Chiara Bacchelli
- Institute of Child Health, University College London, London, UK
| | - Ariane Chapgier
- Institute of Child Health, University College London, London, UK
| | - Bertrand Vernay
- Institute of Child Health, University College London, London, UK
| | - David M Bader
- Department of Cell and Developmental Biology, Vanderbilt University, USA
| | - Charu Deshpande
- Department of Clinical Genetics, Evelina Children's Hospital, London, UK
| | - Mary O' Sullivan
- Institute of Child Health, University College London, London, UK
| | - Louise Ocaka
- Institute of Child Health, University College London, London, UK
| | - Horia Stanescu
- Centre for Nephrology, Royal Free Hospital, University College London, London, UK
| | - Helen S Stewart
- Department of Clinical Genetics, Oxford Radcliffe Hospitals NHS Trust, Churchill Hospital, Oxford, UK
| | - Friedhelm Hildebrandt
- Department of Medicine, Boston Children's Hospital and Harvard Medical School, Boston, USA
| | - Edgar Otto
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | - Colin A Johnson
- Department of Pediatrics, Leeds Institute of Biomedical and Clinical Sciences, Leeds, UK
| | - Katarzyna Szymanska
- Department of Pediatrics, Leeds Institute of Biomedical and Clinical Sciences, Leeds, UK
| | - Nicholas Katsanis
- Center for Human Disease Modeling, Department of Cell Biology, Duke University Medical Center
| | - Erica Davis
- Center for Human Disease Modeling, Department of Cell Biology, Duke University Medical Center
| | - Robert Kleta
- Centre for Nephrology, Royal Free Hospital, University College London, London, UK
| | - Mike Hubank
- Institute of Child Health, University College London, London, UK
| | | | - Andrew Jackson
- Institute of Genetics & Molecular Medicine, Edinburgh, UK MRC Human Genetics, University of Edinburgh, Edinburgh, UK
| | - Elia Stupka
- Institute of Child Health, University College London, London, UK
| | - Mark Winey
- Molecular, Ceullular, and Developmental Biology, University of Colorado at Boulder, Boulder, CO 80309, USA
| | - Philip L Beales
- Institute of Child Health, University College London, London, UK
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20
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Sato Y, Hayashi K, Amano Y, Takahashi M, Yonemura S, Hayashi I, Hirose H, Ohno S, Suzuki A. MTCL1 crosslinks and stabilizes non-centrosomal microtubules on the Golgi membrane. Nat Commun 2014; 5:5266. [PMID: 25366663 DOI: 10.1038/ncomms6266] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 09/12/2014] [Indexed: 02/07/2023] Open
Abstract
Recent studies have revealed the presence of a microtubule subpopulation called Golgi-derived microtubules that support Golgi ribbon formation, which is required for maintaining polarized cell migration. CLASPs and AKAP450/CG-NAP are involved in their formation, but the underlying molecular mechanisms remain unclear. Here, we find that the microtubule-crosslinking protein, MTCL1, is recruited to the Golgi membranes through interactions with CLASPs and AKAP450/CG-NAP, and promotes microtubule growth from the Golgi membrane. Correspondingly, MTCL1 knockdown specifically impairs the formation of the stable perinuclear microtubule network to which the Golgi ribbon tethers and extends. Rescue experiments demonstrate that besides its crosslinking activity mediated by the N-terminal microtubule-binding region, the C-terminal microtubule-binding region plays essential roles in these MTCL1 functions through a novel microtubule-stabilizing activity. These results suggest that MTCL1 cooperates with CLASPs and AKAP450/CG-NAP in the formation of the Golgi-derived microtubules, and mediates their development into a stable microtubule network.
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Affiliation(s)
- Yoshinori Sato
- 1] Molecular Cellular Biology Laboratory, Yokohama City University, Graduate School of Medical Science, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Department of Molecular Biology, Yokohama City University, Graduate School of Medical Science, 3-9, Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Kenji Hayashi
- Molecular Cellular Biology Laboratory, Yokohama City University, Graduate School of Medical Science, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Yoshiko Amano
- Molecular Cellular Biology Laboratory, Yokohama City University, Graduate School of Medical Science, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Mikiko Takahashi
- Faculty of Pharmaceutical Sciences, Teikyo Heisei University, 4-21-2 Nakano, Nakano-ku, Tokyo 164-8530, Japan
| | - Shigenobu Yonemura
- Electron Microscope Laboratory, RIKEN Center for Developmental Biology, 2-2-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Ikuko Hayashi
- Molecular Medical Bioscience Laboratory, Yokohama City University, Graduate School of Medical Life Science, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Hiroko Hirose
- Department of Molecular Biology, Yokohama City University, Graduate School of Medical Science, 3-9, Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Shigeo Ohno
- Department of Molecular Biology, Yokohama City University, Graduate School of Medical Science, 3-9, Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Atsushi Suzuki
- Molecular Cellular Biology Laboratory, Yokohama City University, Graduate School of Medical Science, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
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21
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Yamamoto A. Gathering up meiotic telomeres: a novel function of the microtubule-organizing center. Cell Mol Life Sci 2014; 71:2119-34. [PMID: 24413667 PMCID: PMC11113538 DOI: 10.1007/s00018-013-1548-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 12/12/2013] [Accepted: 12/19/2013] [Indexed: 11/26/2022]
Abstract
During meiosis, telomeres cluster and promote homologous chromosome pairing. Telomere clustering depends on conserved SUN and KASH domain nuclear membrane proteins, which form a complex called the linker of nucleoskeleton and cytoskeleton (LINC) and connect telomeres with the cytoskeleton. It has been thought that LINC-mediated cytoskeletal forces induce telomere clustering. However, how cytoskeletal forces induce telomere clustering is not fully understood. Recent study of fission yeast has shown that the LINC complex forms the microtubule-organizing center (MTOC) at the telomere, which has been designated as the "telocentrosome", and that microtubule motors gather telomeres via telocentrosome-nucleated microtubules. This MTOC-dependent telomere clustering might be conserved in other eukaryotes. Furthermore, the MTOC-dependent clustering mechanism appears to function in various other biological events. This review presents an overview of the current understanding of the mechanism of meiotic telomere clustering and discusses the universality of the MTOC-dependent clustering mechanism.
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Affiliation(s)
- Ayumu Yamamoto
- Department of Chemistry, Graduate School of Science, Shizuoka University, 836 Ohya, Suruga-ku, Sizuoka, 422-8529, Japan,
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22
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Francescantonio PLC, Cruvinel WDM, Dellavance A, Andrade LEC, HurTaliberti B, Mühlen CAV, Bichara CDA, Bueno C, Mangueira CLP, Carvalho DG, Bonfá ESDO, Brito FDA, Araújo FIE, Rêgo J, Pereira KMC, Anjos LMED, Bissoli MDF, Santiago MB, Maluf NZ, Alvarenga RR, Neves SPF, Valim V, Santos WSD. IV Brazilian Guidelines for autoantibodies on HEp-2 cells. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.rbre.2014.02.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Francescantonio PLC, Cruvinel WDM, Dellavance A, Andrade LEC, HurTaliberti B, Mühlen CAV, Bichara CDA, Bueno C, Mangueira CLP, Carvalho DG, Bonfá ESDO, Brito FDA, Araújo FIE, Rêgo J, Pereira KMC, Anjos LMED, Bissoli MDF, Santiago MB, Maluf NZ, Alvarenga RR, Neves SPF, Valim V, Santos WSD. IV Consenso Brasileiro para pesquisa de autoanticorpos em células HEp-2. REVISTA BRASILEIRA DE REUMATOLOGIA 2014. [DOI: 10.1016/j.rbr.2013.10.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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24
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Musinipally V, Howes S, Alushin GM, Nogales E. The microtubule binding properties of CENP-E's C-terminus and CENP-F. J Mol Biol 2013; 425:4427-41. [PMID: 23892111 DOI: 10.1016/j.jmb.2013.07.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/01/2013] [Accepted: 07/18/2013] [Indexed: 01/28/2023]
Abstract
CENP-E (centromere protein E) and CENP-F (centromere protein F), also known as mitosin, are large, multi-functional proteins associated with the outer kinetochore. CENP-E features a well-characterized kinesin motor domain at its N-terminus and a second microtubule-binding domain at its C-terminus of unknown function. CENP-F is important for the formation of proper kinetochore-microtubule attachment and, similar to CENP-E, contains two microtubule-binding domains at its termini. While the importance of these proteins is known, the details of their interactions with microtubules have not yet been investigated. We have biochemically and structurally characterized the microtubule-binding properties of the amino- and carboxyl-terminal domains of CENP-F as well as the carboxyl-terminal (non-kinesin) domain of CENP-E. CENP-E's C-terminus and CENP-F's N-terminus bind microtubules with similar affinity to the well-characterized Ndc80 complex, while CENP-F's C-terminus shows much lower affinity. Electron microscopy analysis reveals that all of these domains engage the microtubule surface in a disordered manner, suggesting that these factors have no favored binding geometry and may allow for initial side-on attachments early in mitosis.
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Affiliation(s)
- Vivek Musinipally
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
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25
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Zhu X, Kaverina I. Golgi as an MTOC: making microtubules for its own good. Histochem Cell Biol 2013; 140:361-7. [PMID: 23821162 DOI: 10.1007/s00418-013-1119-4] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2013] [Indexed: 12/22/2022]
Abstract
In cells, microtubules (MTs) are nucleated at MT-organizing centers (MTOCs). The centrosome-based MTOCs organize radial MT arrays, which are often not optimal for polarized trafficking. A recently discovered subset of non-centrosomal MTs nucleated at the Golgi has proven to be indispensable for the Golgi organization, post-Golgi trafficking and cell polarity. Here, we summarize the history of this discovery, known molecular prerequisites of MT nucleation at the Golgi and unique functions of Golgi-derived MTs.
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Affiliation(s)
- Xiaodong Zhu
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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26
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Yan GR, Zou FY, Dang BL, Zhang Y, Yu G, Liu X, He QY. Genistein-induced mitotic arrest of gastric cancer cells by downregulating KIF20A, a proteomics study. Proteomics 2013; 12:2391-9. [PMID: 22887948 DOI: 10.1002/pmic.201100652] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Genistein exerts its anticarcinogenic effects by inducing G2/M arrest and apoptosis of cancer cells. However, the precise molecular mechanism of action of genistein has not been completely elucidated. In this study, we used quantitative proteomics to identify the genistein-induced protein alterations in gastric cancer cells and investigate the molecular mechanism responsible for the anti-cancer actions of genistein. Total 86 proteins were identified to be regulated by genistein, most of which were clustered into the regulation of cell division and G2/M transition, consistent with the anti-cancer effect of genistein. Many proteins including kinesin family proteins, TPX2, CDCA8, and CIT were identified for the first time to be regulated by genistein. Interestingly, five kinesin family proteins including KIF11, KIF20A, KIF22, KIF23, and CENPF were found to be simultaneously downregulated by genistein. Significantly decreased KIF20A was selected for further functional studies. The silencing of KIF20A inhibited cell viability and induced G2/M arrest, similar to the effects of genistein treatment in gastric cancer. And the silencing of KIF20A also increased cancer cell sensitivity to genistein inhibition, whereas overexpression of KIF20A markedly attenuated genistein-induced cell viability inhibition and G2/M arrest. These observations suggested that KIF20A played an important role in anti-cancer actions of genistein, and thus may be a potential molecular target for drug intervention of gastric cancer.
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Affiliation(s)
- Guang-Rong Yan
- Institute of Life and Health Engineering, and National Engineering and Research Center for Genetic Medicine, Jinan University, Guangzhou, China
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Dees E, Miller PM, Moynihan KL, Pooley RD, Hunt RP, Galindo CL, Rottman JN, Bader DM. Cardiac-specific deletion of the microtubule-binding protein CENP-F causes dilated cardiomyopathy. Dis Model Mech 2012; 5:468-80. [PMID: 22563055 PMCID: PMC3380710 DOI: 10.1242/dmm.008680] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
CENP-F is a large multifunctional protein with demonstrated regulatory roles in cell proliferation, vesicular transport and cell shape through its association with the microtubule (MT) network. Until now, analysis of CENP-F has been limited to in vitro analysis. Here, using a Cre-loxP system, we report the in vivo disruption of CENP-F gene function in murine cardiomyocytes, a cell type displaying high levels of CENP-F expression. Loss of CENP-F function in developing myocytes leads to decreased cell division, blunting of trabeculation and an initially smaller, thin-walled heart. Still, embryos are born at predicted mendelian ratios on an outbred background. After birth, hearts lacking CENP-F display disruption of their intercalated discs and loss of MT integrity particularly at the costamere; these two structures are essential for cell coupling/electrical conduction and force transduction in the heart. Inhibition of myocyte proliferation and cell coupling as well as loss of MT maintenance is consistent with previous reports of generalized CENP-F function in isolated cells. One hundred percent of these animals develop progressive dilated cardiomyopathy with heart block and scarring, and there is a 20% mortality rate. Importantly, although it has long been postulated that the MT cytoskeleton plays a role in the development of heart disease, this study is the first to reveal a direct genetic link between disruption of this network and cardiomyopathy. Finally, this study has broad implications for development and disease because CENP-F loss of function affects a diverse array of cell-type-specific activities in other organs.
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Affiliation(s)
- Ellen Dees
- Department of Pediatrics, Vanderbilt University, Nashville, TN 37232-6300, USA
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28
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Baron Gaillard CL, Pallesi-Pocachard E, Massey-Harroche D, Richard F, Arsanto JP, Chauvin JP, Lecine P, Krämer H, Borg JP, Le Bivic A. Hook2 is involved in the morphogenesis of the primary cilium. Mol Biol Cell 2011; 22:4549-62. [PMID: 21998199 PMCID: PMC3226474 DOI: 10.1091/mbc.e11-05-0405] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Hook2 partitions between the Golgi apparatus and the centrosome, and its depletion hinders ciliogenesis after mother centriole maturation without Golgi breakdown. Hook2 interacts with PCM1 and Rab8a, and Hook2-depleted cells can be forced to grow primary cilia by overexpressing GFP::Rab8a, indicating that Rab8a acts downstream of Hook2 and PCM1. Primary cilia originate from the centrosome and play essential roles in several cellular, developmental, and pathological processes, but the underlying mechanisms of ciliogenesis are not fully understood. Given the involvement of the adaptor protein Hook2 in centrosomal homeostasis and protein transport to pericentrosomal aggresomes, we explored its role in ciliogenesis. We found that in human retinal epithelial cells, Hook2 localizes at the Golgi apparatus and centrosome/basal body, a strategic partitioning for ciliogenesis. Of importance, Hook2 depletion disrupts ciliogenesis at a stage before the formation of the ciliary vesicle at the distal tip of the mother centriole. Using two hybrid and immunoprecipitation assays and a small interfering RNA strategy, we found that Hook2 interacts with and stabilizes pericentriolar material protein 1 (PCM1), which was reported to be essential for the recruitment of Rab8a, a GTPase that is believed to be crucial for membrane transport to the primary cilium. Of interest, GFP::Rab8a coimmunoprecipitates with endogenous Hook2 and PCM1. Finally, GFP::Rab8a can overcome Hook2 depletion, demonstrating a functional interaction between Hook2 and these two important regulators of ciliogenesis. The data indicate that Hook2 interacts with PCM1 in a complex that also contains Rab8a and regulates a limiting step required for further initiation of ciliogenesis after centriole maturation.
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Moreno-Mateos MA, Espina ÁG, Torres B, Gámez del Estal MM, Romero-Franco A, Ríos RM, Pintor-Toro JA. PTTG1/securin modulates microtubule nucleation and cell migration. Mol Biol Cell 2011; 22:4302-11. [PMID: 21937724 PMCID: PMC3216656 DOI: 10.1091/mbc.e10-10-0838] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
PTTG1 is associated with the cis face of the Golgi apparatus and the centrosome, forming a complex with proteins involved in microtubule nucleation. PTTG1 depletion produces a delay in centrosomal and noncentrosomal microtubule nucleation and causes defects in both cell polarization and migration. Pituitary tumor transforming gene 1 (PTTG1), also known as securin, has been implicated in many biological functions, including inhibition of sister chromatid separation, DNA repair, organ development, and regulation of the expression and secretion of angiogenic and metastatic factors. Although most of these functions of securin seem to depend on the localization of PTTG1 in the nucleus of the cell, a fraction of the protein has been also detected in the cytoplasm. Here we demonstrate that, in different cell types, a portion of cytoplasmic PTTG1 is associated with the cis face of the Golgi apparatus and that this localization depends on PTTG1 phosphorylation status. In this organelle, PTTG1 forms a complex with proteins involved in microtubule nucleation, including GM130, AKAP450, and γ-tubulin. RNA interference–mediated depletion of PTTG1 produces a delay in centrosomal and noncentrosomal microtubule nucleation. Cells lacking PTTG1 show severe defects in both cell polarization and migration in wound-healing assays. To our knowledge, this is the first study reporting the role of PTTG1 in microtubule nucleation and cell polarization, two processes directly involved in cell migration. We believe that these findings will contribute to understanding the mechanisms underlying PTTG1-mediated biological functions.
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Affiliation(s)
- Miguel A Moreno-Mateos
- Centro Andaluz de Biología Molecular y Medicina Regenerativa, Consejo Superior de Investigaciones Científicas, 41092 Seville, Spain
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Bolhy S, Bouhlel I, Dultz E, Nayak T, Zuccolo M, Gatti X, Vallee R, Ellenberg J, Doye V. A Nup133-dependent NPC-anchored network tethers centrosomes to the nuclear envelope in prophase. ACTA ACUST UNITED AC 2011; 192:855-71. [PMID: 21383080 PMCID: PMC3051818 DOI: 10.1083/jcb.201007118] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Centrosomes are closely associated with the nuclear envelope (NE) throughout the cell cycle and this association is maintained in prophase when they separate to establish the future mitotic spindle. At this stage, the kinetochore constituents CENP-F, NudE, NudEL, dynein, and dynactin accumulate at the NE. We demonstrate here that the N-terminal domain of the nuclear pore complex (NPC) protein Nup133, although largely dispensable for NPC assembly, is required for efficient anchoring of the dynein/dynactin complex to the NE in prophase. Nup133 exerts this function through an interaction network via CENP-F and NudE/EL. We show that this molecular chain is critical for maintaining centrosome association with the NE at mitotic entry and contributes to this process without interfering with the previously described RanBP2-BICD2-dependent pathway of centrosome anchoring. Finally, our study reveals that tethering of centrosomes to the nuclear surface at the G2/M transition contributes, along with other cellular mechanisms, to early stages of bipolar spindle assembly.
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Affiliation(s)
- Stéphanie Bolhy
- Cell Biology Program, Institut Jacques Monod, UMR 7592 Centre National de la Recherche Scientifique-Université Paris Diderot, 75205 Paris Cedex 13, France
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31
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Verstraeten VLRM, Peckham LA, Olive M, Capell BC, Collins FS, Nabel EG, Young SG, Fong LG, Lammerding J. Protein farnesylation inhibitors cause donut-shaped cell nuclei attributable to a centrosome separation defect. Proc Natl Acad Sci U S A 2011; 108:4997-5002. [PMID: 21383178 PMCID: PMC3064351 DOI: 10.1073/pnas.1019532108] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Despite the success of protein farnesyltransferase inhibitors (FTIs) in the treatment of certain malignancies, their mode of action is incompletely understood. Dissecting the molecular pathways affected by FTIs is important, particularly because this group of drugs is now being tested for the treatment of Hutchinson-Gilford progeria syndrome. In the current study, we show that FTI treatment causes a centrosome separation defect, leading to the formation of donut-shaped nuclei in nontransformed cell lines, tumor cell lines, and tissues of FTI-treated mice. Donut-shaped nuclei arise during chromatin decondensation in late mitosis; subsequently, cells with donut-shaped nuclei exhibit defects in karyokinesis, develop aneuploidy, and are often binucleated. Binucleated cells proliferate slowly. We identified lamin B1 and proteasome-mediated degradation of pericentrin as critical components in FTI-induced "donut formation" and binucleation. Reducing pericentrin expression or ectopic expression of nonfarnesylated lamin B1 was sufficient to elicit donut formation and binucleated cells, whereas blocking proteasomal degradation eliminated FTI-induced donut formation. Our studies have uncovered an important role of FTIs on centrosome separation and define pericentrin as a (indirect) target of FTIs affecting centrosome position and bipolar spindle formation, likely explaining some of the anticancer effects of these drugs.
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Affiliation(s)
- Valerie L. R. M. Verstraeten
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Cambridge, MA 02139
- Department of Dermatology, Maastricht University Medical Center, 6202 AZ, Maastricht, The Netherlands
- GROW-School for Oncology and Developmental Biology, Maastricht University Medical Center, 6200 MD, Maastricht, The Netherlands
| | - Lana A. Peckham
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Cambridge, MA 02139
| | | | - Brian C. Capell
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Francis S. Collins
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Elizabeth G. Nabel
- National Heart, Lung, and Blood Institute and
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Stephen G. Young
- Department of Medicine, University of California, Los Angeles, CA 90095
| | - Loren G. Fong
- Department of Medicine, University of California, Los Angeles, CA 90095
| | - Jan Lammerding
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Cambridge, MA 02139
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