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Tollis S, Goswami P, Palou R, Coffin CH, Thattikota Y, Tyers MD, Royer CA. Growth- and nutrient-dependent G1/S transcription factor upregulation is controlled at the transcriptional level and is critical for proliferation in poor nutrient conditions. Biophys J 2022. [DOI: 10.1016/j.bpj.2021.11.745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Goswami P, Dorsey S, Coffin C, Ghazal G, Thattikota Y, Cheng J, Tollis S, Tyers M, Royer CA. A Novel G1/S Transcription Factor Feedback Loop in the Start Transition in Budding Yeast Revealed by Scanning Number and Brightness. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.1045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Dorsey S, Goswami P, Cheng J, Thattikota Y, Tollis S, Royer CA, Tyers M. Quantification of G1-Cyclin Dynamics in Yeast by Scanning Number and Brightness. Biophys J 2019. [DOI: 10.1016/j.bpj.2018.11.2864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Chatterjee G, Sankaranarayanan SR, Guin K, Thattikota Y, Padmanabhan S, Siddharthan R, Sanyal K. Repeat-Associated Fission Yeast-Like Regional Centromeres in the Ascomycetous Budding Yeast Candida tropicalis. PLoS Genet 2016; 12:e1005839. [PMID: 26845548 PMCID: PMC4741521 DOI: 10.1371/journal.pgen.1005839] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 01/11/2016] [Indexed: 11/19/2022] Open
Abstract
The centromere, on which kinetochore proteins assemble, ensures precise chromosome segregation. Centromeres are largely specified by the histone H3 variant CENP-A (also known as Cse4 in yeasts). Structurally, centromere DNA sequences are highly diverse in nature. However, the evolutionary consequence of these structural diversities on de novo CENP-A chromatin formation remains elusive. Here, we report the identification of centromeres, as the binding sites of four evolutionarily conserved kinetochore proteins, in the human pathogenic budding yeast Candida tropicalis. Each of the seven centromeres comprises a 2 to 5 kb non-repetitive mid core flanked by 2 to 5 kb inverted repeats. The repeat-associated centromeres of C. tropicalis all share a high degree of sequence conservation with each other and are strikingly diverged from the unique and mostly non-repetitive centromeres of related Candida species--Candida albicans, Candida dubliniensis, and Candida lusitaniae. Using a plasmid-based assay, we further demonstrate that pericentric inverted repeats and the underlying DNA sequence provide a structural determinant in CENP-A recruitment in C. tropicalis, as opposed to epigenetically regulated CENP-A loading at centromeres in C. albicans. Thus, the centromere structure and its influence on de novo CENP-A recruitment has been significantly rewired in closely related Candida species. Strikingly, the centromere structural properties along with role of pericentric repeats in de novo CENP-A loading in C. tropicalis are more reminiscent to those of the distantly related fission yeast Schizosaccharomyces pombe. Taken together, we demonstrate, for the first time, fission yeast-like repeat-associated centromeres in an ascomycetous budding yeast.
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Affiliation(s)
- Gautam Chatterjee
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
| | - Sundar Ram Sankaranarayanan
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
| | - Krishnendu Guin
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
| | - Yogitha Thattikota
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
| | - Sreedevi Padmanabhan
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
| | - Rahul Siddharthan
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai, India
| | - Kaustuv Sanyal
- Molecular Mycology Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India
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Abstract
The ability of cells and organisms to survive and function through changes in temperature evolved from their specific adaptations to nonoptimal growth conditions. Responses to elevated temperatures have been studied in yeast and other model organisms using transcriptome profiling and provided valuable biological insights on molecular mechanisms involved in stress tolerance and adaptation to adverse environment. In contrast, little is known about rapid signaling events associated with changes in temperature. To gain a better understanding of global changes in protein phosphorylation in response to heat and cold, we developed a high temporal resolution phosphoproteomics protocol to study cell signaling in Saccharomyces cerevisiae. The method allowed for quantitative analysis of phosphodynamics on 2,777 phosphosites from 1,228 proteins. The correlation of kinetic profiles between kinases and their substrates provided a predictive tool to identify new putative substrates for kinases such as Cdc28 and PKA. Cell cycle analyses revealed that the increased phosphorylation of Cdc28 at its inhibitory site Y19 during heat shock is an adaptive response that delays cell cycle progression under stress conditions. The cellular responses to heat and cold were associated with extensive changes in phosphorylation on proteins implicated in transcription, protein folding and degradation, cell cycle regulation and morphogenesis.
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Affiliation(s)
- Evgeny Kanshin
- Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada
| | - Peter Kubiniok
- Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada Department of Chemistry, Université de Montréal, Montréal, QC, Canada
| | - Yogitha Thattikota
- Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada Department of Pathology and Cell Biology, Université de Montréal, Montréal, QC, Canada
| | - Damien D'Amours
- Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada Department of Pathology and Cell Biology, Université de Montréal, Montréal, QC, Canada
| | - Pierre Thibault
- Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada Department of Chemistry, Université de Montréal, Montréal, QC, Canada Department of Biochemistry, Université de Montréal, Montréal, QC, Canada
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Robellet X, Thattikota Y, Wang F, Wee TL, Pascariu M, Shankar S, Bonneil É, Brown CM, D'Amours D. A high-sensitivity phospho-switch triggered by Cdk1 governs chromosome morphogenesis during cell division. Genes Dev 2015; 29:426-39. [PMID: 25691469 PMCID: PMC4335297 DOI: 10.1101/gad.253294.114] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The initiation of chromosome morphogenesis marks the beginning of mitosis in eukaryotic cells. Robellet et al. found that multisite phosphorylation of the chromatin-binding sensor Smc4 integrates the activation state of Cdk1 with the dynamic binding of the condensation machinery to chromatin. Abrogation of this event leads to chromosome segregation defects and lethality, while moderate reduction reveals the existence of a novel chromatin transition state specific to mitosis, the intertwist configuration. The initiation of chromosome morphogenesis marks the beginning of mitosis in all eukaryotic cells. Although many effectors of chromatin compaction have been reported, the nature and design of the essential trigger for global chromosome assembly remain unknown. Here we reveal the identity of the core mechanism responsible for chromosome morphogenesis in early mitosis. We show that the unique sensitivity of the chromosome condensation machinery for the kinase activity of Cdk1 acts as a major driving force for the compaction of chromatin at mitotic entry. This sensitivity is imparted by multisite phosphorylation of a conserved chromatin-binding sensor, the Smc4 protein. The multisite phosphorylation of this sensor integrates the activation state of Cdk1 with the dynamic binding of the condensation machinery to chromatin. Abrogation of this event leads to chromosome segregation defects and lethality, while moderate reduction reveals the existence of a novel chromatin transition state specific to mitosis, the intertwist configuration. Collectively, our results identify the mechanistic basis governing chromosome morphogenesis in early mitosis and how distinct chromatin compaction states can be established via specific thresholds of Cdk1 kinase activity.
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Affiliation(s)
- Xavier Robellet
- Institute for Research in Immunology and Cancer (IRIC), Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, Quebec H3C 3J7, Canada
| | - Yogitha Thattikota
- Institute for Research in Immunology and Cancer (IRIC), Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, Quebec H3C 3J7, Canada
| | - Fang Wang
- Institute for Research in Immunology and Cancer (IRIC), Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, Quebec H3C 3J7, Canada
| | - Tse-Luen Wee
- Advanced BioImaging Facility (ABIF), Department of Physiology, McGill University, Montréal, Quebec H3G 0B1, Canada
| | - Mirela Pascariu
- Institute for Research in Immunology and Cancer (IRIC), Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, Quebec H3C 3J7, Canada
| | - Sahana Shankar
- Institute for Research in Immunology and Cancer (IRIC), Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, Quebec H3C 3J7, Canada
| | - Éric Bonneil
- Institute for Research in Immunology and Cancer (IRIC)
| | - Claire M Brown
- Advanced BioImaging Facility (ABIF), Department of Physiology, McGill University, Montréal, Quebec H3G 0B1, Canada
| | - Damien D'Amours
- Institute for Research in Immunology and Cancer (IRIC), Département de Pathologie et Biologie Cellulaire, Université de Montréal, Montréal, Quebec H3C 3J7, Canada
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