1
|
Wu F, Akbar H, Wang C, Yuan X, Dou Z, Mullen M, Niu L, Zhang L, Zang J, Wang Z, Yao X, Song X, Liu X. Sgo1 interacts with CENP-A to guide accurate chromosome segregation in mitosis. J Mol Cell Biol 2024; 15:mjad061. [PMID: 37777834 PMCID: PMC11181942 DOI: 10.1093/jmcb/mjad061] [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: 09/05/2022] [Revised: 02/21/2023] [Accepted: 09/29/2023] [Indexed: 10/02/2023] Open
Abstract
Shugoshin-1 (Sgo1) is necessary for maintaining sister centromere cohesion and ensuring accurate chromosome segregation during mitosis. It has been reported that the localization of Sgo1 at the centromere is dependent on Bub1-mediated phosphorylation of histone H2A at T120. However, it remains uncertain whether other centromeric proteins play a role in regulating the localization and function of Sgo1 during mitosis. Here, we show that CENP-A interacts with Sgo1 and determines the localization of Sgo1 to the centromere during mitosis. Further biochemical characterization revealed that lysine and arginine residues in the C-terminal domain of Sgo1 are critical for binding CENP-A. Interestingly, the replacement of these basic amino acids with acidic amino acids perturbed the localization of Sgo1 and Aurora B to the centromere, resulting in aberrant chromosome segregation and premature chromatid separation. Taken together, these findings reveal a previously unrecognized but direct link between Sgo1 and CENP-A in centromere plasticity control and illustrate how the Sgo1-CENP-A interaction guides accurate cell division.
Collapse
Affiliation(s)
- Fengge Wu
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
| | - Hameed Akbar
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
| | - Chunyue Wang
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
| | - Xiao Yuan
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
| | - Zhen Dou
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
- Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - McKay Mullen
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Liwen Niu
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
| | - Liang Zhang
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
| | - Jianye Zang
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
| | - Zhikai Wang
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
| | - Xuebiao Yao
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
| | - Xiaoyu Song
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
| | - Xing Liu
- MOE Key Laboratory for Cellular Dynamics, Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine (IHM), University of Science and Technology of China School of Life Sciences, Hefei 230026, China
- Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei National Center for Cross-disciplinary Sciences, Hefei 230027, China
| |
Collapse
|
2
|
Jusino S, Rivera-Rivera Y, Chardón-Colón C, Rodríguez-Rodríguez PC, Román-González J, Juliá-Hernández VS, Isidro A, Mo Q, Saavedra HI. Sustained Shugoshin 1 downregulation reduces tumor growth and metastasis in a mouse xenograft tumor model of triple-negative breast cancer. Cell Div 2023; 18:6. [PMID: 37122033 PMCID: PMC10150544 DOI: 10.1186/s13008-023-00088-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 04/11/2023] [Indexed: 05/02/2023] Open
Abstract
BACKGROUND Triple-negative breast cancer (TBNC) is an aggressive breast cancer subtype with a poor prognosis. Shugoshin-1 (SGO1) protects chromatids from early separation. Previous studies from our group have demonstrated that transient SGO1 downregulation suppresses early stages of metastasis (the epithelial-to-mesenchymal transition, or EMT, cell invasion, and cell migration) in TNBC cells. Thus, the inhibition of SGO1 activity may represent a potential therapeutic intervention against cancers that progress to metastasis. Therefore, we aimed to investigate the effects of sustained shRNA-mediated SGO1 downregulation on tumor growth and metastasis in TBNC. To that end, female NOD-SCID Gamma (NSG) mice were injected with 2.5 × 106 shRNA Control (n = 10) or shRNA SGO1 (n = 10) MDA-MB-231 cells. After eight weeks, the number of mice with metastasis to the lymph nodes was calculated. Primary and metastatic tumors, as well as lung and liver tissue, were harvested, measured, sectioned, and stained with hematoxylin and eosin (H&E) stain. RESULTS Tumor growth and metastasis to the lymph nodes and lungs were significantly reduced in the shRNA SGO1-treated mice group, while metastasis to the liver tends to be lower in cells with downregulated SGO1, but it did not reach statistical significance. Furthermore, sustained SGO1 downregulation significantly reduced cell proliferation, cell migration, and invasion which correlated with lower levels of Snail, Slug, MMP2, MMP3, and MMP9. CONCLUSION The supression of SGO1 activity in TNBC harboring dysregulated expression of SGO1 may be a potential target for preventing breast cancer growth and metastasis.
Collapse
Affiliation(s)
- Shirley Jusino
- Department of Basic Sciences, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA
| | - Yainyrette Rivera-Rivera
- Department of Basic Sciences, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA
| | - Camille Chardón-Colón
- Department of Basic Sciences, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA
| | - Patricia C Rodríguez-Rodríguez
- Department of Biology, University of Puerto Rico-Ponce, 2151 Avenida Santiago de los Caballeros, Ponce, Puerto Rico, 00716, USA
| | - Janeishly Román-González
- Department of Basic Sciences, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA
| | - Valeria S Juliá-Hernández
- Department of Basic Sciences, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA
| | - Angel Isidro
- Department of Basic Sciences, Division of Physiology, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA
| | - Qianxing Mo
- Department of Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center, 12902 USF Magnolia Drive, Tampa, Florida, 33612, USA
| | - Harold I Saavedra
- Department of Basic Sciences, Ponce Health Sciences University-Ponce Research Institute, 395 Zona Industrial Reparada 2, Ponce, Puerto Rico, 00716-2348, USA.
- Department of Basic Sciences, Division of Pharmacology and Cancer Biology, Ponce Health Sciences University-Ponce Research Institute, 7004, Ponce, Puerto Rico, 00732-7004, USA.
| |
Collapse
|
3
|
Hong J, Gwon D, Jang CY. Ginsenoside Rg1 suppresses cancer cell proliferation through perturbing mitotic progression. J Ginseng Res 2021; 46:481-488. [PMID: 35600766 PMCID: PMC9120780 DOI: 10.1016/j.jgr.2021.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/05/2021] [Accepted: 11/10/2021] [Indexed: 10/27/2022] Open
|
4
|
Functioning mechanisms of Shugoshin-1 in centromeric cohesion during mitosis. Essays Biochem 2021; 64:289-297. [PMID: 32451529 DOI: 10.1042/ebc20190077] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/30/2020] [Accepted: 05/05/2020] [Indexed: 12/15/2022]
Abstract
Proper regulation of centromeric cohesion is required for faithful chromosome segregation that prevents chromosomal instability. Extensive studies have identified and established the conserved protein Shugoshin (Sgo1/2) as an essential protector for centromeric cohesion. In this review, we summarize the current understanding of how Shugoshin-1 (Sgo1) protects centromeric cohesion at the molecular level. Targeting of Sgo1 to inner centromeres is required for its proper function of cohesion protection. We therefore discuss about the molecular mechanisms that install Sgo1 onto inner centromeres. At metaphase-to-anaphase transition, Sgo1 at inner centromeres needs to be disabled for the subsequent sister-chromatid segregation. A few recent studies suggest interesting models to explain how it is achieved. These models are discussed as well.
Collapse
|
5
|
Kim S, Kim NH, Park JE, Hwang JW, Myung N, Hwang KT, Kim YA, Jang CY, Kim YK. PRMT6-mediated H3R2me2a guides Aurora B to chromosome arms for proper chromosome segregation. Nat Commun 2020; 11:612. [PMID: 32001712 PMCID: PMC6992762 DOI: 10.1038/s41467-020-14511-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 01/10/2020] [Indexed: 11/09/2022] Open
Abstract
The kinase Aurora B forms the chromosomal passenger complex (CPC) together with Borealin, INCENP, and Survivin to mediate chromosome condensation, the correction of erroneous spindle-kinetochore attachments, and cytokinesis. Phosphorylation of histone H3 Thr3 by Haspin kinase and of histone H2A Thr120 by Bub1 concentrates the CPC at the centromere. However, how the CPC is recruited to chromosome arms upon mitotic entry is unknown. Here, we show that asymmetric dimethylation at Arg2 on histone H3 (H3R2me2a) by protein arginine methyltransferase 6 (PRMT6) recruits the CPC to chromosome arms and facilitates histone H3S10 phosphorylation by Aurora B for chromosome condensation. Furthermore, in vitro assays show that Aurora B preferentially binds to the H3 peptide containing H3R2me2a and phosphorylates H3S10. Our findings indicate that the long-awaited key histone mark for CPC recruitment onto mitotic chromosomes is H3R2me2a, which is indispensable for maintaining appropriate CPC levels in dynamic translocation throughout mitosis. The proteins of the chromosomal passenger complex help chromosomes condense before cell division, but how this complex arrives at chromosomes was not known. Here the authors show that PRMT6 methylates histone H3 to recruit the chromosomal passenger complex.
Collapse
Affiliation(s)
- Seul Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Nam Hyun Kim
- Department of Pharmacology, College of Medicine, Catholic Kwandong University, Gangneung, 25601, Republic of Korea
| | - Ji Eun Park
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Jee Won Hwang
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Nayeon Myung
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Ki-Tae Hwang
- Department of Surgery, Seoul National University Boramae Medical Center, Seoul, 07061, Republic of Korea
| | - Young A Kim
- Department of Pathology, Seoul National University Boramae Medical Center, Seoul, 07061, Republic of Korea
| | - Chang-Young Jang
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea.
| | - Yong Kee Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea.
| |
Collapse
|
6
|
Jusino S, Saavedra HI. Role of E2Fs and mitotic regulators controlled by E2Fs in the epithelial to mesenchymal transition. Exp Biol Med (Maywood) 2019; 244:1419-1429. [PMID: 31575294 DOI: 10.1177/1535370219881360] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The epithelial-to-mesenchymal transition (EMT) is a complex cellular process in which epithelial cells acquire mesenchymal properties. EMT occurs in three biological settings: development, wound healing and fibrosis, and tumor progression. Despite occurring in three independent biological settings, EMT signaling shares some molecular mechanisms that allow epithelial cells to de-differentiate and acquire mesenchymal characteristics that confer cells invasive and migratory capacity to distant sites. Here we summarize the molecular mechanism that delineates EMT and we will focus on the role of E2 promoter binding factors (E2Fs) in EMT during tumor progression. Since the E2Fs are presently undruggable due to their control in numerous pivotal cellular functions and due to the lack of selectivity against individual E2Fs, we will also discuss the role of three mitotic regulators and/or mitotic kinases controlled by the E2Fs (NEK2, Mps1/TTK, and SGO1) in EMT that can be useful as drug targets. Impact statement The study of the epithelial to mesenchymal transition (EMT) is an active area of research since it is one of the early intermediates to invasion and metastasis—a state of the cancer cells that ultimately kills many cancer patients. We will present in this review that besides their canonical roles as regulators of proliferation, unregulated expression of the E2F transcription factors may contribute to cancer initiation and progression to metastasis by signaling centrosome amplification, chromosome instability, and EMT. Since our discovery that the E2F activators control centrosome amplification and mitosis in cancer cells, we have identified centrosome and mitotic regulators that may represent actionable targets against EMT and metastasis in cancer cells. This is impactful to all of the cancer patients in which the Cdk/Rb/E2F pathway is deregulated, which has been estimated to be most cancer patients with solid tumors.
Collapse
Affiliation(s)
- Shirley Jusino
- Basic Sciences Department, Division of Pharmacology and Toxicology, Ponce Research Institute, Ponce Health Sciences University, Ponce PR 00732, USA
| | - Harold I Saavedra
- Basic Sciences Department, Division of Pharmacology and Toxicology, Ponce Research Institute, Ponce Health Sciences University, Ponce PR 00732, USA
| |
Collapse
|
7
|
Hindriksen S, Lens SMA, Hadders MA. The Ins and Outs of Aurora B Inner Centromere Localization. Front Cell Dev Biol 2017; 5:112. [PMID: 29312936 PMCID: PMC5743930 DOI: 10.3389/fcell.2017.00112] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/04/2017] [Indexed: 01/12/2023] Open
Abstract
Error-free chromosome segregation is essential for the maintenance of genomic integrity during cell division. Aurora B, the enzymatic subunit of the Chromosomal Passenger Complex (CPC), plays a crucial role in this process. In early mitosis Aurora B localizes predominantly to the inner centromere, a specialized region of chromatin that lies at the crossroads between the inter-kinetochore and inter-sister chromatid axes. Two evolutionarily conserved histone kinases, Haspin and Bub1, control the positioning of the CPC at the inner centromere and this location is thought to be crucial for the CPC to function. However, recent studies sketch a subtler picture, in which not all functions of the CPC require strict confinement to the inner centromere. In this review we discuss the molecular pathways that direct Aurora B to the inner centromere and deliberate if and why this specific localization is important for Aurora B function.
Collapse
Affiliation(s)
- Sanne Hindriksen
- Oncode Institute, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Susanne M A Lens
- Oncode Institute, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Michael A Hadders
- Oncode Institute, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| |
Collapse
|
8
|
Lee M, Rivera-Rivera Y, Moreno CS, Saavedra HI. The E2F activators control multiple mitotic regulators and maintain genomic integrity through Sgo1 and BubR1. Oncotarget 2017; 8:77649-77672. [PMID: 29100415 PMCID: PMC5652806 DOI: 10.18632/oncotarget.20765] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 08/14/2017] [Indexed: 02/01/2023] Open
Abstract
The E2F1, E2F2, and E2F3a transcriptional activators control proliferation. However, how the E2F activators regulate mitosis to maintain genomic integrity is unclear. Centrosome amplification (CA) and unregulated spindle assembly checkpoint (SAC) are major generators of aneuploidy and chromosome instability (CIN) in cancer. Previously, we showed that overexpression of single E2F activators induced CA and CIN in mammary epithelial cells, and here we show that combined overexpression of E2F activators did not enhance CA. Instead, the E2F activators elevated expression of multiple mitotic regulators, including Sgo1, Nek2, Hec1, BubR1, and Mps1/TTK. cBioPortal analyses of the TCGA database showed that E2F overexpression in lobular invasive breast tumors correlates with overexpression of multiple regulators of chromosome segregation, centrosome homeostasis, and the SAC. Kaplan-Meier plots identified correlations between individual or combined overexpression of E2F1, E2F3a, Mps1/TTK, Nek2, BubR1, or Hec1 and poor overall and relapse-free survival of breast cancer patients. In MCF10A normal mammary epithelial cells co-overexpressing E2Fs, transient Sgo1 knockdown induced CA, high percentages of premature sister chromatid separation, chromosome losses, increased apoptosis, and decreased cell clonogenicity. BubR1 silencing resulted in chromosome losses without CA, demonstrating that Sgo1 and BubR1 maintain genomic integrity through two distinct mechanisms. Our results suggest that deregulated activation of the E2Fs in mammary epithelial cells is counteracted by activation of a Sgo1-dependent mitotic checkpoint.
Collapse
Affiliation(s)
- Miyoung Lee
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Yainyrette Rivera-Rivera
- Department of Basic Sciences, Program of Pharmacology, Ponce Health Sciences University-School of Medicine/Ponce Research Institute, Ponce, 00716-2348 Puerto Rico
| | - Carlos S Moreno
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Harold I Saavedra
- Department of Basic Sciences, Program of Pharmacology, Ponce Health Sciences University-School of Medicine/Ponce Research Institute, Ponce, 00716-2348 Puerto Rico
| |
Collapse
|
9
|
Rattani A, Ballesteros Mejia R, Roberts K, Roig MB, Godwin J, Hopkins M, Eguren M, Sanchez-Pulido L, Okaz E, Ogushi S, Wolna M, Metson J, Pendás AM, Malumbres M, Novák B, Herbert M, Nasmyth K. APC/C Cdh1 Enables Removal of Shugoshin-2 from the Arms of Bivalent Chromosomes by Moderating Cyclin-Dependent Kinase Activity. Curr Biol 2017; 27:1462-1476.e5. [PMID: 28502659 PMCID: PMC5457479 DOI: 10.1016/j.cub.2017.04.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 02/23/2017] [Accepted: 04/12/2017] [Indexed: 01/06/2023]
Abstract
In mammalian females, germ cells remain arrested as primordial follicles. Resumption of meiosis is heralded by germinal vesicle breakdown, condensation of chromosomes, and their eventual alignment on metaphase plates. At the first meiotic division, anaphase-promoting complex/cyclosome associated with Cdc20 (APC/CCdc20) activates separase and thereby destroys cohesion along chromosome arms. Because cohesion around centromeres is protected by shugoshin-2, sister chromatids remain attached through centromeric/pericentromeric cohesin. We show here that, by promoting proteolysis of cyclins and Cdc25B at the germinal vesicle (GV) stage, APC/C associated with the Cdh1 protein (APC/CCdh1) delays the increase in Cdk1 activity, leading to germinal vesicle breakdown (GVBD). More surprisingly, by moderating the rate at which Cdk1 is activated following GVBD, APC/CCdh1 creates conditions necessary for the removal of shugoshin-2 from chromosome arms by the Aurora B/C kinase, an event crucial for the efficient resolution of chiasmata.
Collapse
Affiliation(s)
- Ahmed Rattani
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Randy Ballesteros Mejia
- Newcastle Fertility Centre, Centre for Life, Times Square, Newcastle upon Tyne NE1 4EP, UK; Wellcome Trust Centre for Mitochondrial Research, Institute for Genetic Medicine, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
| | - Katherine Roberts
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Maurici B Roig
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Jonathan Godwin
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Michael Hopkins
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Manuel Eguren
- Cell Division and Cancer Group, Spanish National Cancer Research Center (CNIO), 28029 Madrid, Spain
| | - Luis Sanchez-Pulido
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - Elwy Okaz
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Sugako Ogushi
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Magda Wolna
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Jean Metson
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Alberto M Pendás
- Instituto de Biología Molecular y Celular del Cáncer de Salamanca, CSIC-Universidad de Salamanca, 37007 Salamanca, Spain
| | - Marcos Malumbres
- Cell Division and Cancer Group, Spanish National Cancer Research Center (CNIO), 28029 Madrid, Spain
| | - Béla Novák
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Mary Herbert
- Newcastle Fertility Centre, Centre for Life, Times Square, Newcastle upon Tyne NE1 4EP, UK; Wellcome Trust Centre for Mitochondrial Research, Institute for Genetic Medicine, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
| | - Kim Nasmyth
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.
| |
Collapse
|
10
|
Asghar A, Lajeunesse A, Dulla K, Combes G, Thebault P, Nigg EA, Elowe S. Bub1 autophosphorylation feeds back to regulate kinetochore docking and promote localized substrate phosphorylation. Nat Commun 2015; 6:8364. [PMID: 26399325 PMCID: PMC4598568 DOI: 10.1038/ncomms9364] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 08/13/2015] [Indexed: 12/15/2022] Open
Abstract
During mitosis, Bub1 kinase phosphorylates histone H2A-T120 to promote centromere sister chromatid cohesion through recruitment of shugoshin (Sgo) proteins. The regulation and dynamics of H2A-T120 phosphorylation are poorly understood. Using quantitative phosphoproteomics we show that Bub1 is autophosphorylated at numerous sites. We confirm mitosis-specific autophosphorylation of a several residues and show that Bub1 activation is primed in interphase but fully achieved only in mitosis. Mutation of a single autophosphorylation site T589 alters kinetochore turnover of Bub1 and results in uniform H2A-T120 phosphorylation and Sgo recruitment along chromosome arms. Consequently, improper sister chromatid resolution and chromosome segregation errors are observed. Kinetochore tethering of Bub1-T589A refocuses H2A-T120 phosphorylation and Sgo1 to centromeres. Recruitment of the Bub1-Bub3-BubR1 axis to kinetochores has recently been extensively studied. Our data provide novel insight into the regulation and kinetochore residency of Bub1 and indicate that its localization is dynamic and tightly controlled through feedback autophosphorylation.
Collapse
Affiliation(s)
- Adeel Asghar
- Faculty of Medicine, Department of Molecular and Cellular Biology, Université Laval, Québec, Canada G1V 0A6.,Department of Reproduction, Mother and Youth Health, Centre de recherche du Centre Hospitalier Universitaire de Québec, Québec, Canada G1V 4G2
| | - Audrey Lajeunesse
- Faculty of Medicine, Department of Molecular and Cellular Biology, Université Laval, Québec, Canada G1V 0A6
| | - Kalyan Dulla
- ProQR Therapeutics N.V., Darwinweg 24, Leiden 2333 CR, The Netherlands
| | - Guillaume Combes
- Faculty of Medicine, Department of Molecular and Cellular Biology, Université Laval, Québec, Canada G1V 0A6.,Department of Reproduction, Mother and Youth Health, Centre de recherche du Centre Hospitalier Universitaire de Québec, Québec, Canada G1V 4G2
| | - Philippe Thebault
- Department of Reproduction, Mother and Youth Health, Centre de recherche du Centre Hospitalier Universitaire de Québec, Québec, Canada G1V 4G2
| | - Erich A Nigg
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, Basel CH-4056, Switzerland
| | - Sabine Elowe
- Faculty of Medicine, Department of Molecular and Cellular Biology, Université Laval, Québec, Canada G1V 0A6.,Department of Reproduction, Mother and Youth Health, Centre de recherche du Centre Hospitalier Universitaire de Québec, Québec, Canada G1V 4G2
| |
Collapse
|