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Kimata Y, Yamada M, Murata T, Kuwata K, Sato A, Suzuki T, Kurihara D, Hasebe M, Higashiyama T, Ueda M. Novel inhibitors of microtubule organization and phragmoplast formation in diverse plant species. Life Sci Alliance 2023; 6:e202201657. [PMID: 36849250 PMCID: PMC9971157 DOI: 10.26508/lsa.202201657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 02/14/2023] [Accepted: 02/14/2023] [Indexed: 03/01/2023] Open
Abstract
Cell division is essential for development and involves spindle assembly, chromosome separation, and cytokinesis. In plants, the genetic tools for controlling the events in cell division at the desired time are limited and ineffective owing to high redundancy and lethality. Therefore, we screened cell division-affecting compounds in Arabidopsis thaliana zygotes, whose cell division is traceable without time-lapse observations. We then determined the target events of the identified compounds using live-cell imaging of tobacco BY-2 cells. Subsequently, we isolated two compounds, PD-180970 and PP2, neither of which caused lethal damage. PD-180970 disrupted microtubule (MT) organization and, thus, nuclear separation, and PP2 blocked phragmoplast formation and impaired cytokinesis. Phosphoproteomic analysis showed that these compounds reduced the phosphorylation of diverse proteins, including MT-associated proteins (MAP70) and class II Kinesin-12. Moreover, these compounds were effective in multiple plant species, such as cucumber (Cucumis sativus) and moss (Physcomitrium patens). These properties make PD-180970 and PP2 useful tools for transiently controlling plant cell division at key manipulation nodes conserved across diverse plant species.
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Affiliation(s)
- Yusuke Kimata
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Moé Yamada
- Department of Biological Science, Division of Natural Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Takashi Murata
- Department of Applied Bioscience, Kanagawa Institute of Technology, Atsugi, Japan
| | - Keiko Kuwata
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
| | - Ayato Sato
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
| | - Takamasa Suzuki
- College of Bioscience and Biotechnology, Chubu University, Kasugai, Japan
| | - Daisuke Kurihara
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
- Institute for Advanced Research (IAR), Nagoya University, Nagoya, Japan
| | - Mitsuyasu Hasebe
- National Institute for Basic Biology, Okazaki, Japan
- School of Life Science, The Graduate University for Advanced Studies, Okazaki, Japan
| | - Tetsuya Higashiyama
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Minako Ueda
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
- Suntory Rising Stars Encouragement Program in Life Sciences (SunRiSE), Kyoto, Japan
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2
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Yoshida MW, Kozgunova E. Microfluidic Device for High-Resolution Cytoskeleton Imaging and Washout Assays in Physcomitrium (Physcomitrella) patens. Methods Mol Biol 2023; 2604:143-158. [PMID: 36773231 DOI: 10.1007/978-1-0716-2867-6_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Visualizing cytoskeleton dynamics at high spatiotemporal resolution provides valuable insights into the way the dynamics change as well as its interactions with multiple proteins in order to maintain cellular function. Oblique illumination fluorescent microscopy is a popular technique to image cellular events localized near the plasma membrane. In this chapter, we provide detailed protocols for high-resolution cytoskeleton imaging using protonema and gametophore cells of the moss Physcomitrella (Physcomitrium patens) in the microfluidic device. These include preparation of the polydimethylsiloxane (PDMS) device, culture of moss cells, and both short- and long-term oblique illumination fluorescent microscopy. We also describe how to introduce to, and wash out from, the device chemical compounds, such as microtubule-disrupting drugs, during live-cell imaging.
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Affiliation(s)
- Mari W Yoshida
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan
| | - Elena Kozgunova
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Aichi, Japan. .,Institute for Advanced Research, Nagoya University, Nagoya, Japan.
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3
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Liu Y, Yang H, Fang Y, Xing Y, Pang X, Li Y, Zhang Y, Liu Y. Function and inhibition of Haspin kinase: targeting multiple cancer therapies by antimitosis. J Pharm Pharmacol 2022; 75:445-465. [PMID: 36334086 DOI: 10.1093/jpp/rgac080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022]
Abstract
Abstract
Objectives
Haploid germ cell-specific nuclear protein kinase (Haspin) is a serine/threonine kinase as an atypical kinase, which is structurally distinct from conventional protein kinases.
Key findings
Functionally, Haspin is involved in important cell cycle progression, particularly in critical mitosis regulating centromeric sister chromatid cohesion during prophase and prometaphase, and subsequently ensuring proper chromosome alignment during metaphase and the normal chromosome segregation during anaphase. However, increasing evidence has demonstrated that Haspin is significantly upregulated in a variety of cancer cells in addition to normal proliferating somatic cells. Its knockdown or small molecule inhibition could prevent cancer cell growth and induce apoptosis by disrupting the regular mitotic progression. Given the specificity of its expressed tissues or cells and the uniqueness of its current known substrate, Haspin can be a promising target against cancer. Consequently, selective synthetic and natural inhibitors of Haspin have been widely developed to determine their inhibitory power for various cancer cells in vivo and in vitro.
Summary
Here our perspective includes a comprehensive review of the roles and structure of Haspin, its relatively potent and selective inhibitors and Haspin’s preliminary studies in a variety of cancers.
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Affiliation(s)
- Yongjian Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Hongliu Yang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yongsheng Fang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yantao Xing
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Xinxin Pang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yang Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yuanyuan Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yonggang Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
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4
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Molecular convergence by differential domain acquisition is a hallmark of chromosomal passenger complex evolution. Proc Natl Acad Sci U S A 2022; 119:e2200108119. [PMID: 36227914 DOI: 10.1073/pnas.2200108119] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The chromosomal passenger complex (CPC) is a heterotetrameric regulator of eukaryotic cell division, consisting of an Aurora-type kinase and a scaffold built of INCENP, Borealin, and Survivin. While most CPC components are conserved across eukaryotes, orthologs of the chromatin reader Survivin have previously only been found in animals and fungi, raising the question of how its essential role is carried out in other eukaryotes. By characterizing proteins that bind to the Arabidopsis Borealin ortholog, we identified BOREALIN RELATED INTERACTOR 1 and 2 (BORI1 and BORI2) as redundant Survivin-like proteins in the context of the CPC in plants. Loss of BORI function is lethal and a reduced expression of BORIs causes severe developmental defects. Similar to Survivin, we find that the BORIs bind to phosphorylated histone H3, relevant for correct CPC association with chromatin. However, this interaction is not mediated by a BIR domain as in previously recognized Survivin orthologs but by an FHA domain, a widely conserved phosphate-binding module. We find that the unifying criterion of Survivin-type proteins is a helix that facilitates complex formation with the other two scaffold components and that the addition of a phosphate-binding domain, necessary for concentration at the inner centromere, evolved in parallel in different eukaryotic groups. Using sensitive similarity searches, we find conservation of this helical domain between animals and plants and identify the missing CPC component in most eukaryotic supergroups. Interestingly, we also detect Survivin orthologs without a defined phosphate-binding domain, likely reflecting the situation in the last eukaryotic common ancestor.
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5
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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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6
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Zhang Q, Dai X, Wang H, Wang F, Tang D, Jiang C, Zhang X, Guo W, Lei Y, Ma C, Zhang H, Li P, Zhao Y, Wang Z. Transcriptomic Profiling Provides Molecular Insights Into Hydrogen Peroxide-Enhanced Arabidopsis Growth and Its Salt Tolerance. FRONTIERS IN PLANT SCIENCE 2022; 13:866063. [PMID: 35463436 PMCID: PMC9019583 DOI: 10.3389/fpls.2022.866063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 02/28/2022] [Indexed: 05/05/2023]
Abstract
Salt stress is an important environmental factor limiting plant growth and crop production. Plant adaptation to salt stress can be improved by chemical pretreatment. This study aims to identify whether hydrogen peroxide (H2O2) pretreatment of seedlings affects the stress tolerance of Arabidopsis thaliana seedlings. The results show that pretreatment with H2O2 at appropriate concentrations enhances the salt tolerance ability of Arabidopsis seedlings, as revealed by lower Na+ levels, greater K+ levels, and improved K+/Na+ ratios in leaves. Furthermore, H2O2 pretreatment improves the membrane properties by reducing the relative membrane permeability (RMP) and malonaldehyde (MDA) content in addition to improving the activities of antioxidant enzymes, including superoxide dismutase, and glutathione peroxidase. Our transcription data show that exogenous H2O2 pretreatment leads to the induced expression of cell cycle, redox regulation, and cell wall organization-related genes in Arabidopsis, which may accelerate cell proliferation, enhance tolerance to osmotic stress, maintain the redox balance, and remodel the cell walls of plants in subsequent high-salt environments.
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Affiliation(s)
- Qikun Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Xiuru Dai
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai’an, China
| | - Huanpeng Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Fanhua Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Dongxue Tang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Chunyun Jiang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
- Linyi Center for Disease Control and Prevention, Linyi, China
| | - Xiaoyan Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Wenjing Guo
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Yuanyuan Lei
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Changle Ma
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Hui Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Pinghua Li
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai’an, China
| | - Yanxiu Zhao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Zenglan Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
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7
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Nomoto Y, Takatsuka H, Yamada K, Suzuki T, Suzuki T, Huang Y, Latrasse D, An J, Gombos M, Breuer C, Ishida T, Maeo K, Imamura M, Yamashino T, Sugimoto K, Magyar Z, Bögre L, Raynaud C, Benhamed M, Ito M. A hierarchical transcriptional network activates specific CDK inhibitors that regulate G2 to control cell size and number in Arabidopsis. Nat Commun 2022; 13:1660. [PMID: 35351906 PMCID: PMC8964727 DOI: 10.1038/s41467-022-29316-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 03/07/2022] [Indexed: 12/13/2022] Open
Abstract
AbstractHow cell size and number are determined during organ development remains a fundamental question in cell biology. Here, we identified a GRAS family transcription factor, called SCARECROW-LIKE28 (SCL28), with a critical role in determining cell size in Arabidopsis. SCL28 is part of a transcriptional regulatory network downstream of the central MYB3Rs that regulate G2 to M phase cell cycle transition. We show that SCL28 forms a dimer with the AP2-type transcription factor, AtSMOS1, which defines the specificity for promoter binding and directly activates transcription of a specific set of SIAMESE-RELATED (SMR) family genes, encoding plant-specific inhibitors of cyclin-dependent kinases and thus inhibiting cell cycle progression at G2 and promoting the onset of endoreplication. Through this dose-dependent regulation of SMR transcription, SCL28 quantitatively sets the balance between cell size and number without dramatically changing final organ size. We propose that this hierarchical transcriptional network constitutes a cell cycle regulatory mechanism that allows to adjust cell size and number to attain robust organ growth.
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8
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Halogen Bonding in Haspin-Halogenated Tubercidin Complexes: Molecular Dynamics and Quantum Chemical Calculations. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27030706. [PMID: 35163974 PMCID: PMC8840108 DOI: 10.3390/molecules27030706] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/16/2022] [Accepted: 01/19/2022] [Indexed: 11/17/2022]
Abstract
Haspin, an atypical serine/threonine protein kinase, is a potential target for cancer therapy. 5-iodotubercidin (5-iTU), an adenosine derivative, has been identified as a potent Haspin inhibitor in vitro. In this paper, quantum chemical calculations and molecular dynamics (MD) simulations were employed to identify and quantitatively confirm the presence of halogen bonding (XB), specifically halogen∙∙∙π (aromatic) interaction between halogenated tubercidin ligands with Haspin. Consistent with previous theoretical finding, the site specificity of the XB binding over the ortho-carbon is identified in all cases. A systematic increase of the interaction energy down Group 17, based on both quantum chemical and MD results, supports the important role of halogen bonding in this series of inhibitors. The observed trend is consistent with the experimental observation of the trend of activity within the halogenated tubercidin ligands (F < Cl < Br < I). Furthermore, non-covalent interaction (NCI) plots show that cooperative non-covalent interactions, namely, hydrogen and halogen bonds, contribute to the binding of tubercidin ligands toward Haspin. The understanding of the role of halogen bonding interaction in the ligand-protein complexes may shed light on rational design of potent ligands in the future.
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9
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Yamaoka Y, Shin S, Lee Y, Ito M, Lee Y, Nishida I. Phosphatidylserine Is Required for the Normal Progression of Cell Plate Formation in Arabidopsis Root Meristems. PLANT & CELL PHYSIOLOGY 2021; 62:1396-1408. [PMID: 34115854 DOI: 10.1093/pcp/pcab086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/05/2021] [Accepted: 06/11/2021] [Indexed: 06/12/2023]
Abstract
Phosphatidylserine (PS) is involved in various cellular processes in yeast and animals. However, PS functions in plants remain unclear. In Arabidopsis, PS is relatively enriched in flower and root tissues, and the genetic disturbance of PS biosynthesis in phosphatidylserine synthase1 (PSS1)/ pss1 heterozygotes induces sporophytic and gametophytic defects during pollen maturation. This study functionally characterized PS in Arabidopsis roots and observed that pss1 seedlings exhibited a short-root phenotype by reducing the meristem size and cell elongation capacity. Confocal microscopy imaging analyses of PS with GFP-LactC2 and the endocytic activity with FM 4-64 revealed that although GFP-LactC2 (or PS) was localized in the plasma membrane and endocytic membranes, the lack of PS in pss1 roots did not affect the constitutive endocytosis. Instead, a fluorescence imaging analysis of the cytokinetic phases in the dividing zone of pss1-2 roots revealed a significant delay in telophase progression, requiring active cargo vesicle trafficking for cell plate formation. Confocal microscopy imaging analysis of transgenic GFP-LactC2 root cells with developing cell plates indicated that GFP-LactC2 was localized at the cell plate. Moreover, confocal microscopy images of transgenic pss1-2 and PSS1 roots expressing the cell plate-specific syntaxin construct ProKNOLLE:eGFP-KNOLLE showed abnormal cell plate development in pss1-2ProKNOLLE:eGFP-KNOLLE roots. These results suggested that PS is required for root cytokinesis, possibly because it helps mediate the cargo vesicular trafficking required for cell plate formation.
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Affiliation(s)
- Yasuyo Yamaoka
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-Okubo 255, Sakura-Ku, Saitama 338-8570, Japan
- Department of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea
- School of Biological Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- Division of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Seungjun Shin
- Department of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea
| | - Yuree Lee
- School of Biological Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Masaki Ito
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Youngsook Lee
- Department of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea
| | - Ikuo Nishida
- Division of Life Science, Graduate School of Science and Engineering, Saitama University, Shimo-Okubo 255, Sakura-Ku, Saitama 338-8570, Japan
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10
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Liu Y, Wang C, Su H, Birchler JA, Han F. Phosphorylation of histone H3 by Haspin regulates chromosome alignment and segregation during mitosis in maize. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1046-1058. [PMID: 33130883 DOI: 10.1093/jxb/eraa506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
In human cells, Haspin-mediated histone H3 threonine 3 (H3T3) phosphorylation promotes centromeric localization of the chromosomal passenger complex, thereby ensuring proper kinetochore-microtubule attachment. Haspin also binds to PDS5 cohesin-associated factor B (Pds5B), antagonizing the Wings apart-like protein homolog (Wapl)-Pds5B interaction and thus preventing Wapl from releasing centromeric cohesion during mitosis. However, the role of Haspin in plant chromosome segregation is not well understood. Here, we show that in maize (Zea mays) mitotic cells, ZmHaspin localized to the centromere during metaphase and anaphase, whereas it localized to the telomeres during meiosis. These results suggest that ZmHaspin plays different roles during mitosis and meiosis. Knockout of ZmHaspin led to decreased H3T3 phosphorylation and histone H3 serine 10 phosphorylation, and defects in chromosome alignment and segregation in mitosis. These lines of evidence suggest that Haspin regulates chromosome segregation in plants via the mechanism described for humans, namely, H3T3 phosphorylation. Plant Haspin proteins lack the RTYGA and PxVxL motifs needed to bind Pds5B and heterochromatin protein 1, and no obvious cohesion defects were detected in ZmHaspin knockout plants. Taken together, these results highlight the conserved but slightly different roles of Haspin proteins in cell division in plants and in animals.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Chunhui Wang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Handong Su
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - James A Birchler
- Division of Biological Sciences, University of Missouri, Columbia, MO, USA
| | - Fangpu Han
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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11
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Haspin-dependent and independent effects of the kinase inhibitor 5-Iodotubercidin on self-renewal and differentiation. Sci Rep 2020; 10:232. [PMID: 31937797 PMCID: PMC6959359 DOI: 10.1038/s41598-019-54350-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 11/08/2019] [Indexed: 01/08/2023] Open
Abstract
The kinase Haspin phosphorylates histone H3 at threonine-3 (H3T3ph), creating a docking site for the Chromosomal Passenger Complex (CPC). CPC plays a pivotal role in preventing chromosome misalignment. Here, we have examined the effects of 5-Iodotubercidin (5-ITu), a commonly used Haspin inhibitor, on self-renewal and differentiation of mouse embryonic stem cells (ESCs). Treatment with low concentrations of 5-ITu eliminates the H3T3ph mark during mitosis, but does not affect the mode or the outcome of self-renewal divisions. Interestingly, 5-ITu causes sustained accumulation of p53, increases markedly the expression of histone genes and results in reversible upregulation of the pluripotency factor Klf4. However, the properties of 5-ITu treated cells are distinct from those observed in Haspin-knockout cells generated by CRISPR/Cas9 genome editing, suggesting “off-target” effects. Continuous exposure to 5-ITu allows modest expansion of the ESC population and growth of embryoid bodies, but release from the drug after an initial treatment aborts embryoid body or teratoma formation. The data reveal an unusual robustness of ESCs against mitotic perturbants and suggest that the lack of H3T3ph and the “off-target” effects of 5-ITu can be partially compensated by changes in expression program or accumulation of suppressor mutations.
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12
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Kozgunova E, Higashiyama T, Kurihara D. Cytokinesis defect in BY-2 cells caused by ATP-competitive kinase inhibitors. PLANT SIGNALING & BEHAVIOR 2016; 11:e1238547. [PMID: 27662076 PMCID: PMC5257169 DOI: 10.1080/15592324.2016.1238547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 09/15/2016] [Indexed: 06/06/2023]
Abstract
Cytokinesis is last but not least in cell division as it completes the formation of the two cells. The main role in cell plate orientation and expansion have been assigned to microtubules and kinesin proteins. However, recently we reported severe cytokinesis defect in BY-2 cells not accompanied by changes in microtubules dynamics. Here we also confirmed that distribution of kinesin NACK1 is not the cause of cytokinesis defect. We further explored inhibition of the cell plate expansion by ATP-competitive inhibitors. Two different inhibitors, 5-Iodotubercidin and ML-7 resulted in a very similar phenotype, which indicates that they target same protein cascade. Interestingly, in our previous study we showed that 5-Iodotubercidin treatment affects concentration of actin filaments on the cell plate, while ML-7 is inhibitor of myosin light chain kinase. Although not directly, it indicates importance of actomyosin complex in plant cytokinesis.
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Affiliation(s)
- Elena Kozgunova
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
| | - Tetsuya Higashiyama
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
- Higashiyama Live-Holonics Project, ERATO, JST, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
- Institute of Transformative Bio-Molecules (ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
| | - Daisuke Kurihara
- Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
- Higashiyama Live-Holonics Project, ERATO, JST, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
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