1
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Sun S, Zhou J, Liu P. Liquid-liquid phase separation of microtubule-binding proteins in the regulation of spindle assembly. Cell Prolif 2024:e13649. [PMID: 38736355 DOI: 10.1111/cpr.13649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/19/2024] [Accepted: 04/15/2024] [Indexed: 05/14/2024] Open
Abstract
Cell division is a highly regulated process essential for the accurate segregation of chromosomes. Central to this process is the assembly of a bipolar mitotic spindle, a highly dynamic microtubule (MT)-based structure responsible for chromosome movement. The nucleation and dynamics of MTs are intricately regulated by MT-binding proteins. Over the recent years, various MT-binding proteins have been reported to undergo liquid-liquid phase separation, forming either single- or multi-component condensates on MTs. Herein, we provide a comprehensive summary of the phase separation characteristics of these proteins. We underscore their critical roles in MT nucleation, spindle assembly and kinetochore-MT attachment during the cell division process. Furthermore, we discuss the current challenges and various remaining unsolved problems, highlights the ongoing research efforts aimed at a deeper understanding of the role of the phase separation process during spindle assembly and orientation. Our review aims to contribute to the collective knowledge in this area and stimulate further investigations that will enhance our comprehension of the intricate mechanisms governing cell division.
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Affiliation(s)
- Shuang Sun
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, Institute of Biomedical Sciences, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Jun Zhou
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, Institute of Biomedical Sciences, College of Life Sciences, Shandong Normal University, Jinan, China
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China
| | - Peiwei Liu
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, Institute of Biomedical Sciences, College of Life Sciences, Shandong Normal University, Jinan, China
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2
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Hedtfeld M, Dammers A, Koerner C, Musacchio A. A validation strategy to assess the role of phase separation as a determinant of macromolecular localization. Mol Cell 2024; 84:1783-1801.e7. [PMID: 38614097 DOI: 10.1016/j.molcel.2024.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 12/11/2023] [Accepted: 03/22/2024] [Indexed: 04/15/2024]
Abstract
Liquid-liquid phase separation (LLPS) of putative assembly scaffolds has been proposed to drive the biogenesis of membraneless compartments. LLPS scaffolds are usually identified through in vitro LLPS assays with single macromolecules (homotypic), but the predictive value of these assays remains poorly characterized. Here, we apply a strategy to evaluate the robustness of homotypic LLPS assays. When applied to the chromosomal passenger complex (CPC), which undergoes LLPS in vitro and localizes to centromeres to promote chromosome biorientation, LLPS propensity in vitro emerged as an unreliable predictor of subcellular localization. In vitro CPC LLPS in aqueous buffers was enhanced by commonly used crowding agents. Conversely, diluted cytomimetic media dissolved condensates of the CPC and of several other proteins. We also show that centromeres do not seem to nucleate LLPS, nor do they promote local, spatially restrained LLPS of the CPC. Our strategy can be adapted to purported LLPS scaffolds of other membraneless compartments.
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Affiliation(s)
- Marius Hedtfeld
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany; Centre for Medical Biotechnology, Faculty of Biology, University Duisburg-Essen, Essen, Germany
| | - Alicia Dammers
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany
| | - Carolin Koerner
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany
| | - Andrea Musacchio
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany; Centre for Medical Biotechnology, Faculty of Biology, University Duisburg-Essen, Essen, Germany.
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3
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Verrillo G, Obeid AM, Genco A, Scrofani J, Orange F, Hanache S, Mignon J, Leyder T, Michaux C, Kempeneers C, Bricmont N, Herkenne S, Vernos I, Martin M, Mottet D. Non-canonical role for the BAF complex subunit DPF3 in mitosis and ciliogenesis. J Cell Sci 2024; 137:jcs261744. [PMID: 38661008 PMCID: PMC11166463 DOI: 10.1242/jcs.261744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 04/04/2024] [Indexed: 04/26/2024] Open
Abstract
DPF3, along with other subunits, is a well-known component of the BAF chromatin remodeling complex, which plays a key role in regulating chromatin remodeling activity and gene expression. Here, we elucidated a non-canonical localization and role for DPF3. We showed that DPF3 dynamically localizes to the centriolar satellites in interphase and to the centrosome, spindle midzone and bridging fiber area, and midbodies during mitosis. Loss of DPF3 causes kinetochore fiber instability, unstable kinetochore-microtubule attachment and defects in chromosome alignment, resulting in altered mitotic progression, cell death and genomic instability. In addition, we also demonstrated that DPF3 localizes to centriolar satellites at the base of primary cilia and is required for ciliogenesis by regulating axoneme extension. Taken together, these findings uncover a moonlighting dual function for DPF3 during mitosis and ciliogenesis.
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Affiliation(s)
- Giulia Verrillo
- University of Liege, GIGA – Research Institute, Molecular Analysis of Gene Expression (MAGE) Laboratory, B34, Avenue de l'Hôpital, B-4000 Liège, Belgium
| | - Anna Maria Obeid
- University of Liege, GIGA – Research Institute, Molecular Analysis of Gene Expression (MAGE) Laboratory, B34, Avenue de l'Hôpital, B-4000 Liège, Belgium
| | - Alexia Genco
- University of Liege, GIGA – Research Institute, Molecular Analysis of Gene Expression (MAGE) Laboratory, B34, Avenue de l'Hôpital, B-4000 Liège, Belgium
| | - Jacopo Scrofani
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona 08003, Spain
| | - François Orange
- Université Côte d'Azur, Centre Commun de Microscopie Appliquée (CCMA), 06100 Nice, France
| | - Sarah Hanache
- University of Liege, GIGA – Research Institute, Molecular Analysis of Gene Expression (MAGE) Laboratory, B34, Avenue de l'Hôpital, B-4000 Liège, Belgium
| | - Julien Mignon
- University of Namur, Laboratory of Physical Chemistry of Biomolecules, Unité de Chimie Physique Théorique et Structurale (UCPTS), Rue de Bruxelles 61, B-5000 Namur, Belgium
| | - Tanguy Leyder
- University of Namur, Laboratory of Physical Chemistry of Biomolecules, Unité de Chimie Physique Théorique et Structurale (UCPTS), Rue de Bruxelles 61, B-5000 Namur, Belgium
| | - Catherine Michaux
- University of Namur, Laboratory of Physical Chemistry of Biomolecules, Unité de Chimie Physique Théorique et Structurale (UCPTS), Rue de Bruxelles 61, B-5000 Namur, Belgium
| | - Céline Kempeneers
- University of Liege, Pneumology Laboratory, I3 Group, GIGA Research Center, B-4000 Liège, Belgium
- Division of Respirology, Department of Pediatrics, University Hospital Liège, B-4000 Liège, Belgium
| | - Noëmie Bricmont
- University of Liege, Pneumology Laboratory, I3 Group, GIGA Research Center, B-4000 Liège, Belgium
- Division of Respirology, Department of Pediatrics, University Hospital Liège, B-4000 Liège, Belgium
| | - Stephanie Herkenne
- University of Liege, GIGA-Cancer, Laboratory of Mitochondria and Cell Communication, B34, Avenue de l'Hôpital, B-4000 Liège, Belgium
| | - Isabelle Vernos
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona 08003, Spain
- Universitat Pompeu Fabra (UPF), Barcelona 08002, Spain
- ICREA, Pg. Lluis Companys 23, Barcelona 08010, Spain
| | - Maud Martin
- Laboratory of Neurovascular Signaling, Department of Molecular Biology, ULB Neuroscience Institute, Université libre de Bruxelles, B-6041 Gosselies, Belgium
| | - Denis Mottet
- University of Liege, GIGA – Research Institute, Molecular Analysis of Gene Expression (MAGE) Laboratory, B34, Avenue de l'Hôpital, B-4000 Liège, Belgium
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4
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Shah ET, Molloy C, Gough M, Kryza T, Samuel SG, Tucker A, Bhatia M, Ferguson G, Heyman R, Vora S, Monkman J, Bolderson E, Kulasinghe A, He Y, Gabrielli B, Hooper JD, Richard DJ, O'Byrne KJ, Adams MN. Inhibition of Aurora B kinase (AURKB) enhances the effectiveness of 5-fluorouracil chemotherapy against colorectal cancer cells. Br J Cancer 2024; 130:1196-1205. [PMID: 38287178 PMCID: PMC10991355 DOI: 10.1038/s41416-024-02584-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 12/18/2023] [Accepted: 01/11/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND 5-Fluorouracil (5-FU) remains a core component of systemic therapy for colorectal cancer (CRC). However, response rates remain low, and development of therapy resistance is a primary issue. Combinatorial strategies employing a second agent to augment the therapeutic effect of chemotherapy is predicted to reduce the incidence of treatment resistance and increase the durability of response to therapy. METHODS Here, we employed quantitative proteomics approaches to identify novel druggable proteins and molecular pathways that are deregulated in response to 5-FU, which might serve as targets to improve sensitivity to chemotherapy. Drug combinations were evaluated using 2D and 3D CRC cell line models and an ex vivo culture model of a patient-derived tumour. RESULTS Quantitative proteomics identified upregulation of the mitosis-associated protein Aurora B (AURKB), within a network of upregulated proteins, in response to a 24 h 5-FU treatment. In CRC cell lines, AURKB inhibition with the dihydrogen phosphate prodrug AZD1152, markedly improved the potency of 5-FU in 2D and 3D in vitro CRC models. Sequential treatment with 5-FU then AZD1152 also enhanced the response of a patient-derived CRC cells to 5-FU in ex vivo cultures. CONCLUSIONS AURKB inhibition may be a rational approach to augment the effectiveness of 5-FU chemotherapy in CRC.
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Affiliation(s)
- Esha T Shah
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Christopher Molloy
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Madeline Gough
- Mater Research Institute - The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Thomas Kryza
- Mater Research Institute - The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Selwin G Samuel
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Amos Tucker
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Maneet Bhatia
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Genevieve Ferguson
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Rebecca Heyman
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Shivam Vora
- Mater Research Institute - The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - James Monkman
- Frazer Institute, Faculty of Medicine, The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Emma Bolderson
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Arutha Kulasinghe
- Frazer Institute, Faculty of Medicine, The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Yaowu He
- Mater Research Institute - The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Brian Gabrielli
- Mater Research Institute - The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - John D Hooper
- Mater Research Institute - The University of Queensland, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Derek J Richard
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
| | - Kenneth J O'Byrne
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia
- Cancer Services, Princess Alexandra Hospital, Ipswich Road, Woolloongabba, QLD, 4102, Australia
| | - Mark N Adams
- Centre for Genomics and Personalised Health, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD, 4102, Australia.
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5
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Bryan NW, Ali A, Niedzialkowska E, Mayne L, Stukenberg PT, Black BE. Structural basis for the phase separation of the chromosome passenger complex. eLife 2024; 13:e92709. [PMID: 38456462 PMCID: PMC10977965 DOI: 10.7554/elife.92709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 03/07/2024] [Indexed: 03/09/2024] Open
Abstract
The physical basis of phase separation is thought to consist of the same types of bonds that specify conventional macromolecular interactions yet is unsatisfyingly often referred to as 'fuzzy'. Gaining clarity on the biogenesis of membraneless cellular compartments is one of the most demanding challenges in biology. Here, we focus on the chromosome passenger complex (CPC), that forms a chromatin body that regulates chromosome segregation in mitosis. Within the three regulatory subunits of the CPC implicated in phase separation - a heterotrimer of INCENP, Survivin, and Borealin - we identify the contact regions formed upon droplet formation using hydrogen/deuterium exchange mass spectrometry (HXMS). These contact regions correspond to some of the interfaces seen between individual heterotrimers within the crystal lattice they form. A major contribution comes from specific electrostatic interactions that can be broken and reversed through initial and compensatory mutagenesis, respectively. Our findings reveal structural insight for interactions driving liquid-liquid demixing of the CPC. Moreover, we establish HXMS as an approach to define the structural basis for phase separation.
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Affiliation(s)
- Nikaela W Bryan
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Graduate Program in Biochemistry and Molecular Biophysics, University of PennsylvaniaPhiladelphiaUnited States
| | - Aamir Ali
- Department of Biochemistry and Molecular Genetics, University of VirginiaCharlottesvilleUnited States
| | - Ewa Niedzialkowska
- Department of Biochemistry and Molecular Genetics, University of VirginiaCharlottesvilleUnited States
| | - Leland Mayne
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - P Todd Stukenberg
- Department of Biochemistry and Molecular Genetics, University of VirginiaCharlottesvilleUnited States
| | - Ben E Black
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Graduate Program in Biochemistry and Molecular Biophysics, University of PennsylvaniaPhiladelphiaUnited States
- Penn Center for Genome Integrity, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Epigenetics Institute, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
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6
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Ledvin L, Gassaway BM, Tawil J, Urso O, Pizzo D, Welsh KA, Bolhuis DL, Fisher D, Bonni A, Gygi SP, Brown NG, Ferguson CJ. The anaphase-promoting complex controls a ubiquitination-phosphoprotein axis in chromatin during neurodevelopment. Dev Cell 2023; 58:2666-2683.e9. [PMID: 37875116 PMCID: PMC10872926 DOI: 10.1016/j.devcel.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 08/07/2023] [Accepted: 10/03/2023] [Indexed: 10/26/2023]
Abstract
Mutations in the degradative ubiquitin ligase anaphase-promoting complex (APC) alter neurodevelopment by impairing proteasomal protein clearance, but our understanding of their molecular and cellular pathogenesis remains limited. Here, we employ the proteomic-based discovery of APC substrates in APC mutant mouse brain and human cell lines and identify the chromosome-passenger complex (CPC), topoisomerase 2a (Top2a), and Ki-67 as major chromatin factors targeted by the APC during neuronal differentiation. These substrates accumulate in phosphorylated form, suggesting that they fail to be eliminated after mitosis during terminal differentiation. The accumulation of the CPC kinase Aurora B within constitutive heterochromatin and hyperphosphorylation of its target histone 3 are corrected in the mutant brain by pharmacologic Aurora B inhibition. Surprisingly, the reduction of Ki-67, but not H3S10ph, rescued the function of constitutive heterochromatin in APC mutant neurons. These results expand our understanding of how ubiquitin signaling regulates chromatin during neurodevelopment and identify potential therapeutic targets in APC-related disorders.
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Affiliation(s)
- Leya Ledvin
- Pathology Department, University of California, San Diego, La Jolla, CA 92093, USA
| | - Brandon M Gassaway
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Jonathan Tawil
- Pathology Department, University of California, San Diego, La Jolla, CA 92093, USA
| | - Olivia Urso
- Pathology Department, University of California, San Diego, La Jolla, CA 92093, USA
| | - Donald Pizzo
- Pathology Department, University of California, San Diego, La Jolla, CA 92093, USA
| | - Kaeli A Welsh
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Derek L Bolhuis
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | | | - Azad Bonni
- Neuroscience Department, Washington University, St. Louis, MO 63110, USA
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Nicholas G Brown
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Cole J Ferguson
- Pathology Department, University of California, San Diego, La Jolla, CA 92093, USA.
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7
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Redouane S, Charoute H, Harmak H, Malki A, Barakat A, Rouba H. Computational study of the potential impact of AURKC missense SNPs on AURKC-INCENP interaction and their correlation to macrozoospermia. J Biomol Struct Dyn 2023; 41:9503-9522. [PMID: 36326488 DOI: 10.1080/07391102.2022.2142846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
Abstract
Aurora Kinase C (AURKC) is considered an important element in Chromosome Passenger Complex (CPC), its interaction with Inner Centromere Protein (INCENP) plays a critical role in the establishment and the recruitment of a stable CPC during spermatogenesis. Genetic variations of AURKC gene are susceptible to impact AURKC-INCENP interaction, which may affect CPC stability and predispose male subjects to macrozoospermia. In this study, we systematically applied computational approaches using different bioinformatic tools to predict the effect of missense SNPs reported on AURKC gene, we selected the deleterious ones and we introduced their corresponding amino acid substitutions on AURKC protein structure. Then we did a protein-protein docking between AURKC variants and INCENP followed by a structural assessment of each resulting complex using PRODIGY server, Yassara view, Ligplot + and we choose the complexes of the most impactful variants for molecular dynamics (MD) simulation study. Seventeen missense SNPs of AURKC were identified as deleterious between all reported ones. All of them were located on relatively conserved positions on AURKC protein according to Consurf server. Only the four missense SNPs; E91K, D166V, D221Y and G235V were ranked as the most impactful ones and were chosen for MD simulation. D221Y and G235V were responsible for the most remarkable changes on AURKC-INCENP structural stability, therefore, they were selected as the most deleterious ones. Experimental studies are recommended to test the actual effect of these two variants and their actual impact on the morphology of sperm cells.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Salaheddine Redouane
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
- Laboratory of Physiopathology and Molecular Genetics, Department of Biology, Faculty of Sciences Ben M'Sik, Hassan II University, Casablanca, Morocco
| | - Hicham Charoute
- Research Unit of Epidemiology, Biostatistics and Bioinformatics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Houda Harmak
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Abderrahim Malki
- Laboratory of Physiopathology and Molecular Genetics, Department of Biology, Faculty of Sciences Ben M'Sik, Hassan II University, Casablanca, Morocco
| | - Abdelhamid Barakat
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Hassan Rouba
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
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8
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Sha L, Yang Z, An S, Yang W, Kim S, Oh H, Xu J, Yin J, Wang H, Lenz HJ, An W, Cho US, Dou Y. Non-canonical MLL1 activity regulates centromeric phase separation and genome stability. Nat Cell Biol 2023; 25:1637-1649. [PMID: 37945831 DOI: 10.1038/s41556-023-01270-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 09/26/2023] [Indexed: 11/12/2023]
Abstract
Epigenetic dysregulation is a prominent feature in cancer, as exemplified by frequent mutations in chromatin regulators, including the MLL/KMT2 family of histone methyltransferases. Although MLL1/KMT2A activity on H3K4 methylation is well documented, their non-canonical activities remain mostly unexplored. Here we show that MLL1/KMT2A methylates Borealin K143 in the intrinsically disordered region essential for liquid-liquid phase separation of the chromosome passenger complex (CPC). The co-crystal structure highlights the distinct binding mode of the MLL1 SET domain with Borealin K143. Inhibiting MLL1 activity or mutating Borealin K143 to arginine perturbs CPC phase separation, reduces Aurora kinase B activity, and impairs the resolution of erroneous kinetochore-microtubule attachments and sister-chromatid cohesion. They significantly increase chromosome instability and aneuploidy in a subset of hepatocellular carcinoma, resulting in growth inhibition. These results demonstrate a non-redundant function of MLL1 in regulating inner centromere liquid condensates and genome stability via a non-canonical enzymatic activity.
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Affiliation(s)
- Liang Sha
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Zi Yang
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Sojin An
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Wentao Yang
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Sungmin Kim
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Hoon Oh
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jing Xu
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jun Yin
- Clinical and Translational Research, CARIS Life Sciences, Phoenix, AZ, USA
| | - He Wang
- Novartis Institutes for BioMedical Research, Cambridge, MA, USA
| | - Heinz-Josef Lenz
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Woojin An
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Uhn-Soo Cho
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Yali Dou
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA.
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9
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Ryu J, Lee SH, Kim S, Jeong JW, Kim KS, Nam S, Kim JE. Urban dust particles disrupt mitotic progression by dysregulating Aurora kinase B-related functions. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132238. [PMID: 37586242 DOI: 10.1016/j.jhazmat.2023.132238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/18/2023]
Abstract
Particulate matter (PM), a major component of outdoor air pollution, damages DNA and increases the risk of cancer. Although the harmful effects of PM at the genomic level are known, the detailed mechanism by which PM affects chromosomal stability remains unclear. In this study, we investigated the novel effects of PM on mitotic progression and identified the underlying mechanisms. Gene set enrichment analysis of lung cancer patients residing in countries with high PM concentrations revealed the downregulation of genes associated with mitosis and mitotic structures. We also showed that exposure of lung cancer cells in vitro to urban dust particles (UDPs) inhibits cell proliferation through a prolonged M phase. The mitotic spindles in UDP-treated cells were hyperstabilized, and the number of centrioles increased. The rate of ingression of the cleavage furrow and actin clearance from the polar cortex was reduced significantly. The defects in mitotic progression were attributed to inactivation of Aurora B at kinetochore during early mitosis, and spindle midzone and midbody during late mitosis. While previous studies demonstrated possible links between PM and mitosis, they did not specifically identify the dysregulation of spatiotemporal dynamics of mitotic proteins and structures (e.g., microtubules, centrosomes, cleavage furrow, and equatorial and polar cortex), which results in the accumulation of chromosomal instability, ultimately contributing to carcinogenicity. The data highlight the novel scientific problem of PM-induced mitotic disruption. Additionally, we introduce a practical visual method for assessing the genotoxic outcomes of airborne pollutants, which has implications for future environmental and public health research.
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Affiliation(s)
- Jaewook Ryu
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, the Republic of Korea; Department of Pharmacology, College of Medicine, Kyung Hee University, Seoul 02447, the Republic of Korea
| | - Seung Hyeun Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Kyung Hee University, Seoul 02447, the Republic of Korea
| | - Sungyeon Kim
- Department of Genome Medicine and Science, AI Convergence Center for Medical Science, Gachon Institute of Genome Medicine and Science, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon 21565, the Republic of Korea
| | - Joo-Won Jeong
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, the Republic of Korea; Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, Seoul 02447, the Republic of Korea
| | - Kyung Sook Kim
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, the Republic of Korea
| | - Seungyoon Nam
- Department of Genome Medicine and Science, AI Convergence Center for Medical Science, Gachon Institute of Genome Medicine and Science, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon 21565, the Republic of Korea; Department of Health Sciences and Technology, Gachon Advanced Institute for Health Sciences and Technology (GAIHST), Gachon University, Incheon 21999, the Republic of Korea
| | - Ja-Eun Kim
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, the Republic of Korea; Department of Pharmacology, College of Medicine, Kyung Hee University, Seoul 02447, the Republic of Korea; Department of Precision Medicine, Graduate School, Kyung Hee University, Seoul 02447, the Republic of Korea.
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10
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Yang D, He Y, Li R, Huang Z, Zhou Y, Shi Y, Deng Z, Wu J, Gao Y. Histone H3K79 methylation by DOT1L promotes Aurora B localization at centromeres in mitosis. Cell Rep 2023; 42:112885. [PMID: 37494186 DOI: 10.1016/j.celrep.2023.112885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 05/23/2023] [Accepted: 07/13/2023] [Indexed: 07/28/2023] Open
Abstract
Centromere localization of the chromosome passenger complex (CPC) is paramount for achieving accurate sister chromosome segregation in mitosis. Although it has been widely recognized that the recruitment of CPC is directly regulated by two histone codes, phosphorylation of histone H3 at threonine 3 (H3T3ph) and phosphorylation of histone H2A at threonine 120 (H2AT120ph), the regulation of CPC localization by other histone codes remains elusive. We show that dysfunction of disruptor of telomeric silencing 1 like (DOT1L) leads to mislocation of the CPC in prometaphase, caused by disturbing the level of H3T3ph and its reader Survivin. This cascade is initiated by over-dephosphorylation of H3T3ph mediated by the phosphatase RepoMan-PP1, whose scaffold RepoMan translocalizes to chromosomes, while the level of H3K79me2/3 is diminished. Together, our findings uncover a biological function of DOT1L and H3K79 methylation in mitosis and give insight into how genomic stability is coordinated by different histone codes.
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Affiliation(s)
- Dan Yang
- The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Yanji He
- The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Renyan Li
- Chongqing Population and Family Planning Science and Technology Research Institute, Chongqing 401120, China
| | - Zhenting Huang
- Center for Medical Epigenetics, School of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Yong Zhou
- The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Yingxu Shi
- The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Zhongliang Deng
- The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Jingxian Wu
- Center for Medical Epigenetics, School of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Yanfei Gao
- Center for Medical Epigenetics, School of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, China.
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11
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Bryan NW, Ali A, Niedzialkowska E, Mayne L, Stukenberg PT, Black BE. Structural Basis for the Phase Separation of the Chromosome Passenger Complex. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.22.541822. [PMID: 37292983 PMCID: PMC10245869 DOI: 10.1101/2023.05.22.541822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The physical basis of phase separation is thought to consist of the same types of bonds that specify conventional macromolecular interactions yet is unsatisfyingly often referred to as 'fuzzy'. Gaining clarity on the biogenesis of membraneless cellular compartments is one of the most demanding challenges in biology. Here, we focus on the chromosome passenger complex (CPC), that forms a chromatin body that regulates chromosome segregation in mitosis. Within the three regulatory subunits of the CPC implicated in phase separation - a heterotrimer of INCENP, Survivin, and Borealin - we identify the contact regions formed upon droplet formation using hydrogen/deuterium-exchange mass spectrometry (HXMS). These contact regions correspond to some of the interfaces seen between individual heterotrimers within the crystal lattice they form. A major contribution comes from specific electrostatic interactions that can be broken and reversed through initial and compensatory mutagenesis, respectively. Our findings reveal structural insight for interactions driving liquid-liquid demixing of the CPC. Moreover, we establish HXMS as an approach to define the structural basis for phase separation.
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Affiliation(s)
- Nikaela W. Bryan
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA, 19104
- Graduate Program in Biochemistry and Molecular Biophysics, University of Pennsylvania, Philadelphia, PA, 19104
| | - Aamir Ali
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, 22904
| | - Ewa Niedzialkowska
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, 22904
| | - Leland Mayne
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA, 19104
| | - P. Todd Stukenberg
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, 22904
| | - Ben E. Black
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA, 19104
- Graduate Program in Biochemistry and Molecular Biophysics, University of Pennsylvania, Philadelphia, PA, 19104
- Penn Center for Genome Integrity, University of Pennsylvania, Philadelphia, PA, 19104
- Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104
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12
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Yang S, Luo Y, Yang M, Ni H, Yin H, Hu M, Liu M, Zhou J, Yang Y, Li D. Src inhibition induces mitotic arrest associated with chromosomal passenger complex. Cell Tissue Res 2023; 392:733-743. [PMID: 36988705 DOI: 10.1007/s00441-023-03765-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 03/15/2023] [Indexed: 03/30/2023]
Abstract
The non-receptor tyrosine kinase Src plays a key role in cell division, migration, adhesion, and survival. Src is overactivated in several cancers, where it transmits signals that promote cell survival, mitosis, and other important cancer hallmarks. Src is therefore a promising target in cancer therapy, but the underlying mechanisms are still uncertain. Here we show that Src is highly conserved across different species. Src expression increases during mitosis and is localized to the chromosomal passenger complex. Knockdown or inhibition of Src induces multipolar spindle formation, resulting in abnormal expression of the Aurora B and INCENP components of the chromosomal passenger complex. Molecular mechanism studies have found that Src interacts with and phosphorylates INCENP. This then leads to incorrect chromosome arrangement and segregation, resulting in cell division failure. Herein, Src and chromosomal passenger complex co-localize and Src inhibition impedes mitotic progression by inducing multipolar spindle formation. These findings provide novel insights into the molecular basis for using Src inhibitors to treat cancer.
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Affiliation(s)
- Song Yang
- Department of Cell Biology School of Basic Medical Sciences Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Youguang Luo
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China.
| | - Mulin Yang
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China
| | - Hua Ni
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China
| | - Hanxiao Yin
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China
| | - Ming Hu
- Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
| | - Min Liu
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Collaborative Innovation Center of Cell Biology, Universities of Shandong, Shandong Normal University, Jinan, China
| | - Jun Zhou
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Collaborative Innovation Center of Cell Biology, Universities of Shandong, Shandong Normal University, Jinan, China
| | - Yunfan Yang
- Department of Cell Biology School of Basic Medical Sciences Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Dengwen Li
- State Key Laboratory of Medicinal Chemical Biology, Haihe Laboratory of Cell Ecosystem, College of Life Sciences, Nankai University, Tianjin, China.
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13
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Nozaki I, Ishikawa N, Miyanari Y, Ogawa K, Tagawa A, Yoshida S, Munekane M, Mishiro K, Toriba A, Nakayama M, Fuchigami T. Borealin-Derived Peptides as Survivin-Targeting Cancer Imaging and Therapeutic Agents. Bioconjug Chem 2022; 33:2149-2160. [DOI: 10.1021/acs.bioconjchem.2c00398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Iori Nozaki
- Laboratory of Clinical Analytical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
- Department of Hygienic Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki852-8521, Japan
| | - Natsumi Ishikawa
- Department of Hygienic Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki852-8521, Japan
| | - Yusuke Miyanari
- Institute of Nano Life Science, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
| | - Kazuma Ogawa
- Laboratory of Clinical Analytical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
- Institute for Frontier Science Initiative, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
| | - Ayako Tagawa
- Institute of Nano Life Science, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
| | - Sakura Yoshida
- Department of Hygienic Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki852-8521, Japan
| | - Masayuki Munekane
- Laboratory of Clinical Analytical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
| | - Kenji Mishiro
- Institute for Frontier Science Initiative, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
| | - Akira Toriba
- Department of Hygienic Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki852-8521, Japan
| | - Morio Nakayama
- Department of Hygienic Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki852-8521, Japan
| | - Takeshi Fuchigami
- Laboratory of Clinical Analytical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa920-1192, Japan
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14
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de Castro RO, Previato de Almeida L, Carbajal A, Gryniuk I, Pezza RJ. PBAF chromatin remodeler complexes that mediate meiotic transitions in mouse. Development 2022; 149:dev199967. [PMID: 36111709 PMCID: PMC9573785 DOI: 10.1242/dev.199967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/18/2022] [Indexed: 09/18/2023]
Abstract
Gametogenesis in mammals encompasses highly regulated developmental transitions. These are associated with changes in transcription that cause characteristic patterns of gene expression observed during distinct stages of gamete development, which include specific activities with critical meiotic functions. SWI/SNF chromatin remodelers are recognized regulators of gene transcription and DNA repair, but their composition and functions in meiosis are poorly understood. We have generated gamete-specific conditional knockout mice for ARID2, a specific regulatory subunit of PBAF, and have compared its phenotype with BRG1 knockouts, the catalytic subunit of PBAF/BAF complexes. While Brg1Δ/Δ knockout acts at an early stage of meiosis and causes cell arrest at pachynema, ARID2 activity is apparently required at the end of prophase I. Striking defects in spindle assembly and chromosome-spindle attachment observed in Arid2Δ/Δ knockouts are attributed to an increase in aurora B kinase, a master regulator of chromosome segregation, at centromeres. Further genetic and biochemical analyses suggest the formation of a canonical PBAF and a BRG1-independent complex containing ARID2 and PBRM1 as core components. The data support a model in which different PBAF complexes regulate different stages of meiosis and gametogenesis.
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Affiliation(s)
- Rodrigo O. de Castro
- Cell Cycle and Cancer Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Luciana Previato de Almeida
- Cell Cycle and Cancer Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Agustin Carbajal
- Cell Cycle and Cancer Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Irma Gryniuk
- Cell Cycle and Cancer Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Roberto J. Pezza
- Cell Cycle and Cancer Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
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15
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Song J, Zhou Y, Yakymovych I, Schmidt A, Li C, Heldin CH, Landström M. The ubiquitin-ligase TRAF6 and TGFβ type I receptor form a complex with Aurora kinase B contributing to mitotic progression and cytokinesis in cancer cells. EBioMedicine 2022; 82:104155. [PMID: 35853811 PMCID: PMC9386726 DOI: 10.1016/j.ebiom.2022.104155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 06/20/2022] [Accepted: 06/24/2022] [Indexed: 11/30/2022] Open
Abstract
Background Transforming growth factor β (TGFβ) is overexpressed in several advanced cancer types and promotes tumor progression. We have reported that the intracellular domain (ICD) of TGFβ receptor (TβR) I is cleaved by proteolytic enzymes in cancer cells, and then translocated to the nucleus in a manner dependent on the endosomal adaptor proteins APPL1/2, driving an invasiveness program. How cancer cells evade TGFβ-induced growth inhibition is unclear. Methods We performed microarray analysis to search for genes regulated by APPL1/2 proteins in castration-resistant prostate cancer (CRPC) cells. We investigated the role of TβRI and TRAF6 in mitosis in cancer cell lines cultured in 10% FBS in the absence of exogenous TGFβ. The molecular mechanism of the ubiquitination of AURKB by TRAF6 in mitosis and the formation of AURKB–TβRI complex in cancer cell lines and tissue microarrays was also studied. Findings During mitosis and cytokinesis, AURKB–TβRI complexes formed in midbodies in CRPC and KELLY neuroblastoma cells. TRAF6 induced polyubiquitination of AURKB on K85 and K87, protruding on the surface of AURKB to facilitate its activation. AURKB–TβRI complexes in patient's tumor tissue sections correlated with the malignancy of prostate cancer. Interpretation The AURKB–TβRI complex may become a prognostic biomarker for patients with risk of developing aggressive PC. Funding Swedish Medical Research Council (2019-01598, ML; 2015-02757 and 2020-01291, CHH), the Swedish Cancer Society (20 0964, ML), a regional agreement between Umeå University and Region Västerbotten (ALF; RV-939377, -967041, -970057, ML). The European Research Council (787472, CHH). KAW 2019.0345, and the Kempe Foundation SMK-1866; ML. National Microscopy Infrastructure (NMI VR-RFI 2016-00968).
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Affiliation(s)
- Jie Song
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85 Umeå, Sweden
| | - Yang Zhou
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85 Umeå, Sweden
| | - Ihor Yakymovych
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, Box 582, SE-751 23 Uppsala, Sweden
| | - Alexej Schmidt
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85 Umeå, Sweden
| | - Chunyan Li
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85 Umeå, Sweden
| | - Carl-Henrik Heldin
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, Box 582, SE-751 23 Uppsala, Sweden
| | - Maréne Landström
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85 Umeå, Sweden.
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16
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I B, López-Jiménez P, Mena I, Viera A, Page J, González-Martínez J, Maestre C, Malumbres M, Suja JA, Gómez R. Haspin participates in AURKB recruitment to centromeres and contributes to chromosome congression in male mouse meiosis. J Cell Sci 2022; 135:275954. [PMID: 35694956 DOI: 10.1242/jcs.259546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 06/06/2022] [Indexed: 11/20/2022] Open
Abstract
Chromosome segregation requires that centromeres properly attach to spindle microtubules. This essential step regulates the accuracy of cell division and therefore must be precisely regulated. One of the main centromeric regulatory signaling pathways is the Haspin-H3T3ph-chromosomal passenger complex (CPC) cascade, which is responsible for the recruitment of the CPC to the centromeres. In mitosis, Haspin kinase phosphorylates histone H3 at threonine 3 (H3T3ph), an essential epigenetic mark that recruits the CPC, whose catalytic component is Aurora B kinase. However, the centromeric Haspin-H3T3ph-CPC pathway remains largely uncharacterized in mammalian male meiosis. We have analyzed Haspin functions by either its chemical inhibition in cultured spermatocytes using LDN-192960, or the ablation of Haspin gene in Haspin-/-. Our studies suggest that Haspin kinase activity is required for proper chromosome congression during both meiotic divisions and for the recruitment of Aurora B and kinesin MCAK to meiotic centromeres. However, the absence of H3T3ph histone mark does not alter Borealin and SGO2 centromeric localization. These results add new and relevant information regarding the regulation of the Haspin-H3T3ph-CPC pathway and centromere function during meiosis.
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Affiliation(s)
- Berenguer I
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - P López-Jiménez
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - I Mena
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - A Viera
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - J Page
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - J González-Martínez
- Cell Division and Cancer group, Spanish National Cancer Research Centre (CNIO), 29029 Madrid, Spain
| | - C Maestre
- Cell Division and Cancer group, Spanish National Cancer Research Centre (CNIO), 29029 Madrid, Spain
| | - M Malumbres
- Cell Division and Cancer group, Spanish National Cancer Research Centre (CNIO), 29029 Madrid, Spain
| | - J A Suja
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - R Gómez
- Cell Biology Unit, Department of Biology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
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17
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CCAR2 controls mitotic progression through spatiotemporal regulation of Aurora B. Cell Death Dis 2022; 13:534. [PMID: 35672287 PMCID: PMC9174277 DOI: 10.1038/s41419-022-04990-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/27/2022] [Accepted: 05/30/2022] [Indexed: 01/21/2023]
Abstract
CCAR2 (cell cycle and apoptosis regulator 2) is a multifaceted protein involved in cell survival and death following cytotoxic stress. However, little is known about the physiological functions of CCAR2 in regulating cell proliferation in the absence of external stimuli. The present study shows that CCAR2-deficient cells possess multilobulated nuclei, suggesting a defect in cell division. In particular, the duration of mitotic phase was perturbed. This disturbance of mitotic progression resulted from premature loss of cohesion with the centromere, and inactivation of the spindle assembly checkpoint during prometaphase and metaphase. It resulted in the formation of lagging chromosomes during anaphase, leading ultimately to the activation of the abscission checkpoint to halt cytokinesis. The CCAR2-dependent mitotic progression was related to spatiotemporal regulation of active Aurora B. In conclusion, the results suggest that CCAR2 governs mitotic events, including proper chromosome segregation and cytokinetic division, to maintain chromosomal stability.
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18
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Maccaroni K, La Torre M, Burla R, Saggio I. Phase Separation in the Nucleus and at the Nuclear Periphery during Post-Mitotic Nuclear Envelope Reformation. Cells 2022; 11:cells11111749. [PMID: 35681444 PMCID: PMC9179440 DOI: 10.3390/cells11111749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/24/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023] Open
Abstract
Membrane-enclosed organelle compartmentalization is not the only way by which cell processes are spatially organized. Phase separation is emerging as a new driver in the organization of membrane-less compartments and biological processes. Liquid–liquid phase separation has been indicated as a new way to control the kinetics of molecular reactions and is based on weak multivalent interactions affecting the stoichiometry of the molecules involved. In the nucleus, liquid–liquid phase separation may represent an ancestral means of controlling genomic activity by forming discrete chromatin regions, regulating transcriptional activity, contributing to the assembly of DNA damage response foci, and controlling the organization of chromosomes. Liquid–liquid phase separation also contributes to chromatin function through its role in the reorganization of the nuclear periphery in the post-mitotic phase. Herein, we describe the basic principles regulating liquid–liquid phase separation, analyze examples of phase separation occurring in the nucleus, and dedicate attention to the implication of liquid–liquid phase separation in the reorganization of the nuclear periphery by the endosomal sorting complexes required for transport (ESCRT) machinery. Although some caution is warranted, current scientific knowledge allows for the hypothesis that many factors and processes in the cell are yet to be discovered which are functionally associated with phase separation.
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Affiliation(s)
- Klizia Maccaroni
- Department of Biology and Biotechnology, Sapienza University, 00185 Rome, Italy; (K.M.); (M.L.T.); (R.B.)
| | - Mattia La Torre
- Department of Biology and Biotechnology, Sapienza University, 00185 Rome, Italy; (K.M.); (M.L.T.); (R.B.)
| | - Romina Burla
- Department of Biology and Biotechnology, Sapienza University, 00185 Rome, Italy; (K.M.); (M.L.T.); (R.B.)
- CNR Institute of Molecular Biology and Pathology, 00185 Rome, Italy
| | - Isabella Saggio
- Department of Biology and Biotechnology, Sapienza University, 00185 Rome, Italy; (K.M.); (M.L.T.); (R.B.)
- CNR Institute of Molecular Biology and Pathology, 00185 Rome, Italy
- Institute of Structural Biology, Nanyang Technological University, Singapore 639798, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore 639798, Singapore
- Correspondence:
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19
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Zhang Z, Tang S, Jiang Y, Long F, He F, Liu J, Gu S, Lu Y, Yin Z. Oxidative stress induces meiotic defects of oocytes in a mouse psoriasis model. Cell Death Dis 2022; 13:474. [PMID: 35589679 PMCID: PMC9119936 DOI: 10.1038/s41419-022-04948-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/09/2022] [Accepted: 05/12/2022] [Indexed: 12/14/2022]
Abstract
Psoriasis, an immune-mediated inflammatory disease, is associated with poor pregnancy outcomes. Emerging evidence indicates that these defects are likely attributed to compromised oocyte competence. Nevertheless, little is known about the underlying associated mechanisms between psoriasis and poor oocyte quality. In this study, we construct an imiquimod-induced chronic psoriasis-like mouse model to review the effects of psoriasis on oocyte quality. We discover that oocytes from psoriasis-like mice display spindle/chromosome disorganization, kinetochore-microtubule mis-attachment, and aneuploidy. Importantly, our results show that melatonin supplement in vitro and in vivo not only increases the rate of matured oocytes but also significantly attenuates oxidative stress and meiotic defects by restoring mitochondrial function in oocytes from psoriasis-like mice. Altogether, our data uncover the adverse effects of psoriasis symptoms on oocytes, and melatonin supplement ameliorates oxidative stress and meiotic defects of oocytes from psoriatic mice.
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Affiliation(s)
- ZhiQin Zhang
- grid.412676.00000 0004 1799 0784Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - ShouBin Tang
- grid.89957.3a0000 0000 9255 8984State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
| | - YuYing Jiang
- grid.89957.3a0000 0000 9255 8984State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China ,grid.89957.3a0000 0000 9255 8984Department of Immunology, Nanjing Medical University, Nanjing, China
| | - FangYuan Long
- grid.412676.00000 0004 1799 0784Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China ,grid.506261.60000 0001 0706 7839Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Chinese Academy of Medical Sciences &Peking Union Medical College, Nanjing, China
| | - Fang He
- grid.412676.00000 0004 1799 0784Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jian Liu
- grid.412676.00000 0004 1799 0784Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - ShouYong Gu
- grid.452512.50000 0004 7695 6551Jiangsu Province Geriatric Hospital, Jiangsu province Geriatric Institute, Nanjing, China
| | - Yan Lu
- grid.412676.00000 0004 1799 0784Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - ZhiQiang Yin
- grid.412676.00000 0004 1799 0784Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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20
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SWAP, SWITCH, and STABILIZE: Mechanisms of Kinetochore–Microtubule Error Correction. Cells 2022; 11:cells11091462. [PMID: 35563768 PMCID: PMC9104000 DOI: 10.3390/cells11091462] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 11/17/2022] Open
Abstract
For correct chromosome segregation in mitosis, eukaryotic cells must establish chromosome biorientation where sister kinetochores attach to microtubules extending from opposite spindle poles. To establish biorientation, any aberrant kinetochore–microtubule interactions must be resolved in the process called error correction. For resolution of the aberrant interactions in error correction, kinetochore–microtubule interactions must be exchanged until biorientation is formed (the SWAP process). At initiation of biorientation, the state of weak kinetochore–microtubule interactions should be converted to the state of stable interactions (the SWITCH process)—the conundrum of this conversion is called the initiation problem of biorientation. Once biorientation is established, tension is applied on kinetochore–microtubule interactions, which stabilizes the interactions (the STABILIZE process). Aurora B kinase plays central roles in promoting error correction, and Mps1 kinase and Stu2 microtubule polymerase also play important roles. In this article, we review mechanisms of error correction by considering the SWAP, SWITCH, and STABILIZE processes. We mainly focus on mechanisms found in budding yeast, where only one microtubule attaches to a single kinetochore at biorientation, making the error correction mechanisms relatively simpler.
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21
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Doodhi H, Tanaka TU. Swap and stop - Kinetochores play error correction with microtubules: Mechanisms of kinetochore-microtubule error correction: Mechanisms of kinetochore-microtubule error correction. Bioessays 2022; 44:e2100246. [PMID: 35261042 PMCID: PMC9344824 DOI: 10.1002/bies.202100246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 12/30/2022]
Abstract
Correct chromosome segregation in mitosis relies on chromosome biorientation, in which sister kinetochores attach to microtubules from opposite spindle poles prior to segregation. To establish biorientation, aberrant kinetochore–microtubule interactions must be resolved through the error correction process. During error correction, kinetochore–microtubule interactions are exchanged (swapped) if aberrant, but the exchange must stop when biorientation is established. In this article, we discuss recent findings in budding yeast, which have revealed fundamental molecular mechanisms promoting this “swap and stop” process for error correction. Where relevant, we also compare the findings in budding yeast with mechanisms in higher eukaryotes. Evidence suggests that Aurora B kinase differentially regulates kinetochore attachments to the microtubule end and its lateral side and switches relative strength of the two kinetochore–microtubule attachment modes, which drives the exchange of kinetochore–microtubule interactions to resolve aberrant interactions. However, Aurora B kinase, recruited to centromeres and inner kinetochores, cannot reach its targets at kinetochore–microtubule interface when tension causes kinetochore stretching, which stops the kinetochore–microtubule exchange once biorientation is established.
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Affiliation(s)
- Harinath Doodhi
- Centre for Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee, UK
| | - Tomoyuki U Tanaka
- Centre for Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee, UK
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22
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Ferguson CJ, Urso O, Bodrug T, Gassaway BM, Watson ER, Prabu JR, Lara-Gonzalez P, Martinez-Chacin RC, Wu DY, Brigatti KW, Puffenberger EG, Taylor CM, Haas-Givler B, Jinks RN, Strauss KA, Desai A, Gabel HW, Gygi SP, Schulman BA, Brown NG, Bonni A. APC7 mediates ubiquitin signaling in constitutive heterochromatin in the developing mammalian brain. Mol Cell 2022; 82:90-105.e13. [PMID: 34942119 PMCID: PMC8741739 DOI: 10.1016/j.molcel.2021.11.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 10/14/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022]
Abstract
Neurodevelopmental cognitive disorders provide insights into mechanisms of human brain development. Here, we report an intellectual disability syndrome caused by the loss of APC7, a core component of the E3 ubiquitin ligase anaphase promoting complex (APC). In mechanistic studies, we uncover a critical role for APC7 during the recruitment and ubiquitination of APC substrates. In proteomics analyses of the brain from mice harboring the patient-specific APC7 mutation, we identify the chromatin-associated protein Ki-67 as an APC7-dependent substrate of the APC in neurons. Conditional knockout of the APC coactivator protein Cdh1, but not Cdc20, leads to the accumulation of Ki-67 protein in neurons in vivo, suggesting that APC7 is required for the function of Cdh1-APC in the brain. Deregulated neuronal Ki-67 upon APC7 loss localizes predominantly to constitutive heterochromatin. Our findings define an essential function for APC7 and Cdh1-APC in neuronal heterochromatin regulation, with implications for understanding human brain development and disease.
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Affiliation(s)
- Cole J Ferguson
- Department of Neuroscience, Washington University, St. Louis, MO 63110, USA; Department of Pathology & Immunology, Neuropathology Division, Physician-Scientist Training Program, Washington University, St. Louis, MO 63110, USA
| | - Olivia Urso
- Department of Neuroscience, Washington University, St. Louis, MO 63110, USA
| | - Tatyana Bodrug
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | | | | | - Pablo Lara-Gonzalez
- Department of Cellular and Molecular Medicine, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA; Ludwig Institute for Cancer Research, University of California, San Diego, La Jolla, CA 92093, USA
| | - Raquel C Martinez-Chacin
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Dennis Y Wu
- Department of Neuroscience, Washington University, St. Louis, MO 63110, USA
| | | | | | - Cora M Taylor
- Geisinger Autism & Developmental Medicine Institute, Lewisburg, PA 17837, USA
| | - Barbara Haas-Givler
- Geisinger Autism & Developmental Medicine Institute, Lewisburg, PA 17837, USA
| | - Robert N Jinks
- Department of Biology, Franklin and Marshall College, Lancaster, PA 17603, USA
| | | | - Arshad Desai
- Department of Cellular and Molecular Medicine, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA; Ludwig Institute for Cancer Research, University of California, San Diego, La Jolla, CA 92093, USA
| | - Harrison W Gabel
- Department of Neuroscience, Washington University, St. Louis, MO 63110, USA
| | - Steven P Gygi
- Department of Cell Biology, Harvard University, Boston, MA 02138, USA
| | | | - Nicholas G Brown
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Azad Bonni
- Department of Neuroscience, Washington University, St. Louis, MO 63110, USA.
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23
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McKim KS. Highway to hell-thy meiotic divisions: Chromosome passenger complex functions driven by microtubules: CPC interactions with both the chromosomes and microtubules are important for spindle assembly and function: CPC interactions with both the chromosomes and microtubules are important for spindle assembly and function. Bioessays 2022; 44:e2100202. [PMID: 34821405 PMCID: PMC8688318 DOI: 10.1002/bies.202100202] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 01/03/2023]
Abstract
The chromosome passenger complex (CPC) localizes to chromosomes and microtubules, sometimes simultaneously. The CPC also has multiple domains for interacting with chromatin and microtubules. Interactions between the CPC and both the chromatin and microtubules is important for spindle assembly and error correction. Such dual chromatin-microtubule interactions may increase the concentration of the CPC necessary for efficient kinase activity while also making it responsive to specific conditions or structures in the cell. CPC-microtubule dependent functions are considered in the context of the first meiotic division. Acentrosomal spindle assembly is a process that depends on transfer of the CPC from the chromosomes to the microtubules. Furthermore, transfer to the microtubules is not only to position the CPC for a later role in cytokinesis; metaphase I error correction and subsequent bi-orientation of bivalents may depend on microtubule associated CPC interacting with the kinetochores.
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Affiliation(s)
- Kim S McKim
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, New Jersey, USA
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24
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Martin IM, Aponte-Santamaría C, Schmidt L, Hedtfeld M, Iusupov A, Musacchio A, Gräter F. Phosphorylation tunes elongation propensity and cohesiveness of INCENP's intrinsically disordered region. J Mol Biol 2021; 434:167387. [PMID: 34883116 DOI: 10.1016/j.jmb.2021.167387] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/24/2021] [Accepted: 11/30/2021] [Indexed: 11/16/2022]
Abstract
The inner centromere protein, INCENP, is crucial for correct chromosome segregation during mitosis. It connects the kinase Aurora B to the inner centromere allowing this kinase to dynamically access its kinetochore targets. However, the function of its central, 440-residue long intrinsically disordered region (IDR) and its multiple phosphorylation sites is unclear. Here, we determined the conformational ensemble of INCENP's IDR, systematically varying the level of phosphorylation, using all-atom and coarse-grain molecular dynamics simulations. Our simulations show that phosphorylation expands INCENP's IDR, both locally and globally, mainly by increasing its overall net charge. The disordered region undergoes critical globule-to-coil conformational transitions and the transition temperature non-monotonically depends on the degree of phosphorylation, with a mildly phosphorylated case of neutral net charge featuring the highest collapse propensity. The IDR transitions from a multitude of globular states, accompanied by several specific internal contacts that reduce INCENP length by loop formation, to weakly interacting and highly extended coiled conformations. Phosphorylation critically shifts the population between these two regimes. It thereby influences cohesiveness and phase behavior of INCENP IDR assemblies, a feature presumably relevant for INCENP's function in the chromosomal passenger complex. Overall, we propose the disordered region of INCENP to act as a phosphorylation-regulated and length-variable component, within the previously defined "dog-leash" model, that thereby regulates how Aurora B reaches its targets for proper chromosome segregation.
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Affiliation(s)
- Isabel M Martin
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany. https://twitter.com/@IsabelMMartin
| | - Camilo Aponte-Santamaría
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany; Max Planck Tandem Group in Computational Biophysics, University of Los Andes, Cra. 1 #18a-12, 111711 Bogotá, Colombia. https://twitter.com/@camiloapontelab
| | - Lisa Schmidt
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany
| | - Marius Hedtfeld
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany; International Max Planck Research School for Living Matter, Otto-Hahn-Straße 11, 44227 Dortmund, Germany; Centre for Medical Biotechnology, Faculty of Biology, University Duisburg-Essen, Essen, Germany
| | - Adel Iusupov
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany; University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany; Max Planck School Matter to Life, Jahnstrasse 29, 69120 Heidelberg, Germany
| | - Andrea Musacchio
- Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Straße 11, 44227 Dortmund, Germany; Centre for Medical Biotechnology, Faculty of Biology, University Duisburg-Essen, Essen, Germany. https://twitter.com/@AndreaMusacchi1
| | - Frauke Gräter
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany; Max Planck School Matter to Life, Jahnstrasse 29, 69120 Heidelberg, Germany; Interdisciplinary Center for Scientific Computing, Heidelberg University, INF 205, 69120 Heidelberg, Germany.
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25
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Abstract
The purpose of this review is to explore self-organizing mechanisms that pattern microtubules (MTs) and spatially organize animal cell cytoplasm, inspired by recent experiments in frog egg extract. We start by reviewing conceptual distinctions between self-organizing and templating mechanisms for subcellular organization. We then discuss self-organizing mechanisms that generate radial MT arrays and cell centers in the absence of centrosomes. These include autocatalytic MT nucleation, transport of minus ends, and nucleation from organelles such as melanosomes and Golgi vesicles that are also dynein cargoes. We then discuss mechanisms that partition the cytoplasm in syncytia, in which multiple nuclei share a common cytoplasm, starting with cytokinesis, when all metazoan cells are transiently syncytial. The cytoplasm of frog eggs is partitioned prior to cytokinesis by two self-organizing modules, protein regulator of cytokinesis 1 (PRC1)-kinesin family member 4A (KIF4A) and chromosome passenger complex (CPC)-KIF20A. Similar modules may partition longer-lasting syncytia, such as early Drosophila embryos. We end by discussing shared mechanisms and principles for the MT-based self-organization of cellular units.
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Affiliation(s)
- Timothy J Mitchison
- Harvard Medical School, Boston, Massachusetts 02115, USA; ,
- Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA
| | - Christine M Field
- Harvard Medical School, Boston, Massachusetts 02115, USA; ,
- Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA
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26
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Spegg V, Altmeyer M. Biomolecular condensates at sites of DNA damage: More than just a phase. DNA Repair (Amst) 2021; 106:103179. [PMID: 34311273 PMCID: PMC7612016 DOI: 10.1016/j.dnarep.2021.103179] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 12/12/2022]
Abstract
Protein recruitment to DNA break sites is an integral part of the DNA damage response (DDR). Elucidation of the hierarchy and temporal order with which DNA damage sensors as well as repair and signaling factors assemble around chromosome breaks has painted a complex picture of tightly regulated macromolecular interactions that build specialized compartments to facilitate repair and maintenance of genome integrity. While many of the underlying interactions, e.g. between repair factors and damage-induced histone marks, can be explained by lock-and-key or induced fit binding models assuming fixed stoichiometries, structurally less well defined interactions, such as the highly dynamic multivalent interactions implicated in phase separation, also participate in the formation of multi-protein assemblies in response to genotoxic stress. Although much remains to be learned about these types of cooperative and highly dynamic interactions and their functional roles, the rapidly growing interest in material properties of biomolecular condensates and in concepts from polymer chemistry and soft matter physics to understand biological processes at different scales holds great promises. Here, we discuss nuclear condensates in the context of genome integrity maintenance, highlighting the cooperative potential between clustered stoichiometric binding and phase separation. Rather than viewing them as opposing scenarios, their combined effects can balance structural specificity with favorable physicochemical properties relevant for the regulation and function of multilayered nuclear condensates.
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Affiliation(s)
- Vincent Spegg
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland
| | - Matthias Altmeyer
- Department of Molecular Mechanisms of Disease, University of Zurich, Zurich, Switzerland.
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27
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Jang JK, Gladstein AC, Das A, Shapiro JG, Sisco ZL, McKim KS. Multiple pools of PP2A regulate spindle assembly, kinetochore attachments and cohesion in Drosophila oocytes. J Cell Sci 2021; 134:jcs254037. [PMID: 34297127 PMCID: PMC8325958 DOI: 10.1242/jcs.254037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 06/14/2021] [Indexed: 01/06/2023] Open
Abstract
Meiosis in female oocytes lacks centrosomes, the microtubule-organizing centers. In Drosophila oocytes, meiotic spindle assembly depends on the chromosomal passenger complex (CPC). To investigate the mechanisms that regulate Aurora B activity, we examined the role of protein phosphatase 2A (PP2A) in Drosophila oocyte meiosis. We found that both forms of PP2A, B55 and B56, antagonize the Aurora B spindle assembly function, suggesting that a balance between Aurora B and PP2A activity maintains the oocyte spindle during meiosis I. PP2A-B56, which has a B subunit encoded by two partially redundant paralogs, wdb and wrd, is also required for maintenance of sister chromatid cohesion, establishment of end-on microtubule attachments, and metaphase I arrest in oocytes. WDB recruitment to the centromeres depends on BUBR1, MEI-S332 and kinetochore protein SPC105R. Although BUBR1 stabilizes microtubule attachments in Drosophila oocytes, it is not required for cohesion maintenance during meiosis I. We propose at least three populations of PP2A-B56 regulate meiosis, two of which depend on SPC105R and a third that is associated with the spindle.
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Affiliation(s)
| | | | | | | | | | - Kim S. McKim
- Waksman Institute, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
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28
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Wang LI, DeFosse T, Jang JK, Battaglia RA, Wagner VF, McKim KS. Borealin directs recruitment of the CPC to oocyte chromosomes and movement to the microtubules. J Cell Biol 2021; 220:211972. [PMID: 33836043 PMCID: PMC8185691 DOI: 10.1083/jcb.202006018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 01/17/2021] [Accepted: 03/11/2021] [Indexed: 12/25/2022] Open
Abstract
The chromosomes in the oocytes of many animals appear to promote bipolar spindle assembly. In Drosophila oocytes, spindle assembly requires the chromosome passenger complex (CPC), which consists of INCENP, Borealin, Survivin, and Aurora B. To determine what recruits the CPC to the chromosomes and its role in spindle assembly, we developed a strategy to manipulate the function and localization of INCENP, which is critical for recruiting the Aurora B kinase. We found that an interaction between Borealin and the chromatin is crucial for the recruitment of the CPC to the chromosomes and is sufficient to build kinetochores and recruit spindle microtubules. HP1 colocalizes with the CPC on the chromosomes and together they move to the spindle microtubules. We propose that the Borealin interaction with HP1 promotes the movement of the CPC from the chromosomes to the microtubules. In addition, within the central spindle, rather than at the centromeres, the CPC and HP1 are required for homologous chromosome bi-orientation.
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Affiliation(s)
- Lin-Ing Wang
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, NJ
| | - Tyler DeFosse
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, NJ
| | - Janet K Jang
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, NJ
| | - Rachel A Battaglia
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, NJ
| | - Victoria F Wagner
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, NJ
| | - Kim S McKim
- Waksman Institute and Department of Genetics, Rutgers, the State University of New Jersey, Piscataway, NJ
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29
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Nagpal H, Fierz B. The Elusive Structure of Centro-Chromatin: Molecular Order or Dynamic Heterogenetity? J Mol Biol 2021; 433:166676. [PMID: 33065112 DOI: 10.1016/j.jmb.2020.10.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/07/2020] [Accepted: 10/08/2020] [Indexed: 01/09/2023]
Abstract
The centromere is an essential chromatin domain required for kinetochore recruitment and chromosome segregation in eukaryotes. To perform this role, centro-chromatin adopts a unique structure that provides access to kinetochore proteins and maintains stability under tension during mitosis. This is achieved by the presence of nucleosomes containing the H3 variant CENP-A, which also acts as the epigenetic mark defining the centromere. In this review, we discuss the role of CENP-A on the structure and dynamics of centromeric chromatin. We further discuss the impact of the CENP-A binding proteins CENP-C, CENP-N, and CENP-B on modulating centro-chromatin structure. Based on these findings we provide an overview of the higher order structure of the centromere.
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Affiliation(s)
- Harsh Nagpal
- Laboratory of Biophysical Chemistry of Macromolecules, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Beat Fierz
- Laboratory of Biophysical Chemistry of Macromolecules, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
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30
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Assembling the right type of switch: Protein condensation to signal cell death. Curr Opin Cell Biol 2021; 69:55-61. [PMID: 33461073 DOI: 10.1016/j.ceb.2020.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/30/2020] [Accepted: 12/12/2020] [Indexed: 11/22/2022]
Abstract
Protein phase transitions are particularly amenable for cell signalling as these highly cooperative processes allow cells to make binary decisions in response to relatively small intracellular changes. The different processes of condensate formation and the distinct material properties of the resulting condensates provide a dictionary to modulate a range of decisions on cell fate. We argue that, on the one hand, the reversibility of liquid demixing offers a chance to arrest cell growth under specific circumstances. On the other hand, the transition to amyloids is better suited for terminal decisions such as those leading to apoptosis and necrosis. Here, we review recent examples of both scenarios, highlighting how mutations in signalling proteins affect the formation of biomolecular condensates with drastic effects on cell survival.
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