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Ohtsuka H, Imada K, Shimasaki T, Aiba H. Sporulation: A response to starvation in the fission yeast Schizosaccharomyces pombe. Microbiologyopen 2022; 11:e1303. [PMID: 35765188 PMCID: PMC9214231 DOI: 10.1002/mbo3.1303] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/08/2022] [Accepted: 06/08/2022] [Indexed: 12/02/2022] Open
Abstract
The fission yeast Schizosaccharomyces pombe employs two main strategies to adapt to the environment and survive when starved for nutrients. The strategies employ sporulation via sexual differentiation and extension of the chronological lifespan. When a cell is exposed to nutrient starvation in the presence of a cell of the opposite sex, the cells undergo fusion through conjugation and sporulation through meiosis. S. pombe spores are highly resistant to diverse stresses and may survive for a very long time. In this minireview, among the various sexual differentiation processes induced by starvation, we focused on and summarized the findings of the molecular mechanisms of spore formation in fission yeast. Furthermore, comparative measurements of the chronological lifespan of stationary phase cells and G0 cells and the survival period of spore cells revealed that the spore cells survived for a long period, indicating the presence of an effective mechanism for survival. Currently, many molecules involved in sporulation and their functions are being discovered; however, our understanding of these is not complete. Further understanding of spores may not only deepen our comprehension of sexual differentiation but may also provide hints for sustaining life.
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Affiliation(s)
- Hokuto Ohtsuka
- Laboratory of Molecular Microbiology, Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical SciencesNagoya UniversityChikusa‐kuNagoyaJapan
| | - Kazuki Imada
- Department of Chemistry and BiochemistryNational Institute of Technology (KOSEN), Suzuka CollegeSuzukaJapan
- Department of Biology, Graduate School of ScienceOsaka City UniversitySumiyoshi‐kuOsakaJapan
| | - Takafumi Shimasaki
- Laboratory of Molecular Microbiology, Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical SciencesNagoya UniversityChikusa‐kuNagoyaJapan
| | - Hirofumi Aiba
- Laboratory of Molecular Microbiology, Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical SciencesNagoya UniversityChikusa‐kuNagoyaJapan
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Andric V, Rougemaille M. Long Non-Coding RNAs in the Control of Gametogenesis: Lessons from Fission Yeast. Noncoding RNA 2021; 7:ncrna7020034. [PMID: 34208016 PMCID: PMC8293462 DOI: 10.3390/ncrna7020034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/03/2021] [Accepted: 06/09/2021] [Indexed: 12/21/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) contribute to cell fate decisions by modulating genome expression and stability. In the fission yeast Schizosaccharomyces pombe, the transition from mitosis to meiosis results in a marked remodeling of gene expression profiles, which ultimately ensures gamete production and inheritance of genetic information to the offspring. This key developmental process involves a set of dedicated lncRNAs that shape cell cycle-dependent transcriptomes through a variety of mechanisms, including epigenetic modifications and the modulation of transcription, post-transcriptional and post-translational regulations, and that contribute to meiosis-specific chromosomal events. In this review, we summarize the biology of these lncRNAs, from their identification to mechanism of action, and discuss their regulatory role in the control of gametogenesis.
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Affiliation(s)
- Vedrana Andric
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France
- Institute Curie, PSL Research University, CNRS UMR3215, INSERM U934, 75005 Paris, France;
| | - Mathieu Rougemaille
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France
- Correspondence:
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Ding DQ, Okamasa K, Katou Y, Oya E, Nakayama JI, Chikashige Y, Shirahige K, Haraguchi T, Hiraoka Y. Chromosome-associated RNA-protein complexes promote pairing of homologous chromosomes during meiosis in Schizosaccharomyces pombe. Nat Commun 2019; 10:5598. [PMID: 31811152 PMCID: PMC6898681 DOI: 10.1038/s41467-019-13609-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 11/18/2019] [Indexed: 01/07/2023] Open
Abstract
Pairing of homologous chromosomes in meiosis is essential for sexual reproduction. We have previously demonstrated that the fission yeast sme2 RNA, a meiosis-specific long noncoding RNA (lncRNA), accumulates at the sme2 chromosomal loci and mediates their robust pairing in meiosis. However, the mechanisms underlying lncRNA-mediated homologous pairing have remained elusive. In this study, we identify conserved RNA-binding proteins that are required for robust pairing of homologous chromosomes. These proteins accumulate mainly at the sme2 and two other chromosomal loci together with meiosis-specific lncRNAs transcribed from these loci. Remarkably, the chromosomal accumulation of these lncRNA–protein complexes is required for robust pairing. Moreover, the lncRNA–protein complexes exhibit phase separation properties, since 1,6-hexanediol treatment reversibly disassembled these complexes and disrupted the pairing of associated loci. We propose that lncRNA–protein complexes assembled at specific chromosomal loci mediate recognition and subsequent pairing of homologous chromosomes. During meiosis, pairing of homologous chromosomes is critical for sexual reproduction. Here the authors reveal in S. pombe the role of lncRNA–protein complexes during the pairing of homologues chromosomes that assemble at specific chromosomal loci to mediate recognition of the pairs.
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Affiliation(s)
- Da-Qiao Ding
- Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, 651-2492, Japan.
| | - Kasumi Okamasa
- Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, 651-2492, Japan
| | - Yuki Katou
- Institute for Quantitative Biosciences, The University of Tokyo, Tokyo, 113-0032, Japan
| | - Eriko Oya
- Graduate School of Natural Sciences, Nagoya City University, Nagoya, 467-8501, Japan.,Faculty of Science and Engineering, Chuo University, Tokyo, 112-8551, Japan
| | - Jun-Ichi Nakayama
- Graduate School of Natural Sciences, Nagoya City University, Nagoya, 467-8501, Japan.,Division of Chromatin Regulation, National Institute for Basic Biology, Okazaki, 444-8585, Japan
| | - Yuji Chikashige
- Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, 651-2492, Japan
| | - Katsuhiko Shirahige
- Institute for Quantitative Biosciences, The University of Tokyo, Tokyo, 113-0032, Japan
| | - Tokuko Haraguchi
- Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, 651-2492, Japan.,Graduate School of Frontier Biosciences, Osaka University, Suita, 565-0871, Japan
| | - Yasushi Hiraoka
- Advanced ICT Research Institute Kobe, National Institute of Information and Communications Technology, Kobe, 651-2492, Japan. .,Graduate School of Frontier Biosciences, Osaka University, Suita, 565-0871, Japan.
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Shigehisa A, Okuzaki D, Kasama T, Tohda H, Hirata A, Nojima H. Mug28, a meiosis-specific protein of Schizosaccharomyces pombe, regulates spore wall formation. Mol Biol Cell 2010; 21:1955-67. [PMID: 20410137 PMCID: PMC2883940 DOI: 10.1091/mbc.e09-12-0997] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The meiosis-specific mug28+ gene of Schizosaccharomyces pombe encodes a putative RNA-binding protein. mug28Δ cells generated spores with low viability, due to the aberrant FSM formation. Meu14-GFP in mug28Δ cells showed that the FSM formed extra membranes with buds. We conclude that Mug28 is essential for the proper maturation of the FSM and the spore wall. The meiosis-specific mug28+ gene of Schizosaccharomyces pombe encodes a putative RNA-binding protein with three RNA recognition motifs (RRMs). Live observations of meiotic cells that express Mug28 tagged with green fluorescent protein (GFP) revealed that Mug28 is localized in the cytoplasm, and accumulates around the nucleus from metaphase I to anaphase II. Disruption of mug28+ generated spores with low viability, due to the aberrant formation of the forespore membrane (FSM). Visualization of the FSM in living cells expressing GFP-tagged Psy1, an FSM protein, indicated that mug28Δ cells harbored abnormal FSMs that contained buds, and had a delayed disappearance of Meu14, a leading edge protein. Electron microscopic observation revealed that FSM formation was abnormal in mug28Δ cells, showing bifurcated spore walls that were thicker than the nonbifurcated spore walls of the wild type. Analysis of Mug28 mutants revealed that RRM3, in particular phenylalanin-466, is of primary importance for the proper localization of Mug28, spore viability, and FSM formation. Together, we conclude that Mug28 is essential for the proper maturation of the FSM and the spore wall.
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Affiliation(s)
- Akira Shigehisa
- Department of Molecular Genetics, Osaka University, Suita, Osaka 565-0871, Japan
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Kig C, Temizkan G. Nitric oxide as a signaling molecule in the fission yeast Schizosaccharomyces pombe. PROTOPLASMA 2009; 238:59-66. [PMID: 19795185 DOI: 10.1007/s00709-009-0074-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 09/08/2009] [Indexed: 05/28/2023]
Abstract
Nitric oxide synthases (NOS) catalyze the synthesis of ubiquitous signaling molecule nitric oxide (NO) which controls numerous biological processes. Using a spectrofluorometric NOS assay, we have measured the rate of total NO production in the crude cell extracts of Schizosaccharomyces pombe. NO production was reduced in the absence of NOS cofactors calmodulin and tetrahydrobiopterin, and a competitive NOS inhibitor NG-nitro-L-arginine methyl ester (L-NAME) was able to cause a statistically significant inhibition on the rate of total NO production. These results, for the first time, provide evidence that an enzyme with a NOS-like activity may be present in the fission yeast. In order to assess the possible regulatory roles of NO as a signaling molecule in this yeast, using the differential display technique, we screened for NO-responsive genes whose expression decreased upon exposure to L-NAME and increased in response to an NO donor, sodium nitroprusside treatment. Differential expression patterns of byr1, pek1, sid1, and wis1 genes were confirmed by quantitative real-time PCR. The physiological experiments performed based on the functions and molecular interactions of these genes have pointed to the possibility that NO production might be required for sporulation in S. pombe. Taken together, these findings suggest that NO may function as a signaling molecule which can induce both transcriptional and physiological changes in the fission yeast. Hence, these data also imply that S. pombe can be used as a model system for investigating the mechanisms underlying NO-related complex signaling pathways.
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Affiliation(s)
- Cenk Kig
- Department of Molecular Biology and Genetics, Faculty of Science, Istanbul University, Vezneciler, 34134 Istanbul, Turkey.
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Diamond AE, Park JS, Inoue I, Tachikawa H, Neiman AM. The anaphase promoting complex targeting subunit Ama1 links meiotic exit to cytokinesis during sporulation in Saccharomyces cerevisiae. Mol Biol Cell 2008; 20:134-45. [PMID: 18946082 DOI: 10.1091/mbc.e08-06-0615] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Ascospore formation in yeast is accomplished through a cell division in which daughter nuclei are engulfed by newly formed plasma membranes, termed prospore membranes. Closure of the prospore membrane must be coordinated with the end of meiosis II to ensure proper cell division. AMA1 encodes a meiosis-specific activator of the anaphase promoting complex (APC). The activity of APC(Ama1) is inhibited before meiosis II, but the substrates specifically targeted for degradation by Ama1 at the end of meiosis are unknown. We show here that ama1Delta mutants are defective in prospore membrane closure. Ssp1, a protein found at the leading edge of the prospore membrane, is stabilized in ama1Delta mutants. Inactivation of a conditional form of Ssp1 can partially rescue the sporulation defect of the ama1Delta mutant, indicating that an essential function of Ama1 is to lead to the removal of Ssp1. Depletion of Cdc15 causes a defect in meiotic exit. We find that prospore membrane closure is also defective in Cdc15 and that this defect can be overcome by expression of a form of Ama1 in which multiple consensus cyclin-dependent kinase phosphorylation sites have been mutated. These results demonstrate that APC(Ama1) functions to coordinate the exit from meiosis II with cytokinesis.
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Affiliation(s)
- Aviva E Diamond
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY 11794-5215, USA
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Naponelli V, Noiriel A, Ziemak MJ, Beverley SM, Lye LF, Plume AM, Botella JR, Loizeau K, Ravanel S, Rébeillé F, de Crécy-Lagard V, Hanson AD. Phylogenomic and functional analysis of pterin-4a-carbinolamine dehydratase family (COG2154) proteins in plants and microorganisms. PLANT PHYSIOLOGY 2008; 146:1515-27. [PMID: 18245455 PMCID: PMC2287330 DOI: 10.1104/pp.107.114090] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Pterin-4a-carbinolamine dehydratases (PCDs) recycle oxidized pterin cofactors generated by aromatic amino acid hydroxylases (AAHs). PCDs are known biochemically only from animals and one bacterium, but PCD-like proteins (COG2154 in the Clusters of Orthologous Groups [COGs] database) are encoded by many plant and microbial genomes. Because these genomes often encode no AAH homologs, the annotation of their COG2154 proteins as PCDs is questionable. Moreover, some COG2154 proteins lack canonical residues that are catalytically important in mammalian PCDs. Diverse COG2154 proteins of plant, fungal, protistan, and prokaryotic origin were therefore tested for PCD activity by functional complementation in Escherichia coli, and the plant proteins were localized using green fluorescent protein fusions. Higher and lower plants proved to have two COG2154 proteins, a mitochondrial one with PCD activity and a noncanonical, plastidial one without. Phylogenetic analysis indicated that the latter is unique to plants and arose from the former early in the plant lineage. All 10 microbial COG2154 proteins tested had PCD activity; six of these came from genomes with no AAH, and six were noncanonical. The results suggested the motif [EDKH]-x(3)-H-[HN]-[PCS]-x(5,6)-[YWF]-x(9)-[HW]-x(8,15)-D as a signature for PCD activity. Organisms having a functional PCD but no AAH partner include angiosperms, yeast, and various prokaryotes. In these cases, PCD presumably has another function. An ancillary role in molybdopterin cofactor metabolism, hypothesized from phylogenomic evidence, was supported by demonstrating significantly lowered activities of two molybdoenzymes in Arabidopsis thaliana PCD knockout mutants. Besides this role, we propose that partnerless PCDs support the function of as yet unrecognized pterin-dependent enzymes.
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Affiliation(s)
- Valeria Naponelli
- Department of Horticultural Sciences , University of Florida, Gainesville, Florida 32611, USA
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Schizosaccharomyces pombe Sst4p, a conserved Vps27/Hrs homolog, functions downstream of phosphatidylinositol 3-kinase Pik3p to mediate proper spore formation. EUKARYOTIC CELL 2007; 6:2343-53. [PMID: 17951524 DOI: 10.1128/ec.00211-07] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Sporulation of the fission yeast Schizosaccharomyces pombe is a developmental process that generates gametes and that includes the formation of spore envelope precursors called the forespore membranes. Assembly and development of forespore membranes require vesicular trafficking from other intracellular membrane compartments. We have shown that phosphatidylinositol 3-kinase (PtdIns 3-kinase) is required for efficient and proper development of forespore membranes. The role of a FYVE domain protein, Sst4p, a homolog of Vps27p/Hrs, as a downstream factor for PtdIns 3-kinase in sporulation was investigated. sst4Delta asci formed spores with oval-shaped morphology and with reduced viability compared to that of the wild-type spores. The extension of forespore membranes was inefficient, and bubble-like structures emerged from the leading edges of the forespore membranes. Sst4p localization was examined using fluorescent protein fusions and was found to be adjacent to the forespore membranes during sporulation. The localization and function of Sst4p were dependent on its FYVE domain and on PtdIns 3-kinase. Sst4p colocalized and interacted with Hse1p, a homolog of Saccharomyces cerevisiae Hse1p and of mammalian STAM. Mutations in all three UIM domains of the Sst4p/Hse1p complex resulted in formation of spores with abnormal morphology. These results suggest that Sst4p is a downstream factor of PtdIns 3-kinase and functions in forespore membrane formation.
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Lin WY, Chang JY, Tsai PC, Pan TM. Metabolic protein patterns and monascorubrin production revealed through proteomic approach for Monascus pilosus treated with cycloheximide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:5559-68. [PMID: 17559225 DOI: 10.1021/jf070162f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Monascus species have the unique ability to economically produce many secondary metabolites. However, most metabolic regulation processes in the production of secondary metabolites in Monascus remain unclear. We found that the translational inhibitor cycloheximide induced different expression patterns between the monascorubrin pigment production and the growth in Monascus pilosus. Here, we used the proteomic approach of two-dimensional gel electrophoresis, matrix-assisted laser desorption ionization time-of-flight/time-of-flight liquid chromatography-mass spectrometry (MALDI-TOF/TOF LC-MS), and tandem mass spectrometry (MS/MS) to identify the intracellular and mitochondrial proteins of M. pilosus between the cycloheximide treatment and the control. These results revealed that the cycloheximide-induced down-regulated proteins were involved in transcriptional regulation, peptide synthesis, and other metabolic processes, such as methylation of secondary metabolites. In contrast, the energy-related proteins, such as the transcriptional regulator rosAr and 1,4-alpha-glucan branching enzyme, were up-regulated as compared to the control.
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Affiliation(s)
- Wun-Yuan Lin
- Department of Food Science, Nutrition and Nutraceutical Biotechnology, Shih Chien University, Taipei, Taiwan
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Kasama T, Shigehisa A, Hirata A, Saito TT, Tougan T, Okuzaki D, Nojima H. Spo5/Mug12, a putative meiosis-specific RNA-binding protein, is essential for meiotic progression and forms Mei2 dot-like nuclear foci. EUKARYOTIC CELL 2007; 5:1301-13. [PMID: 16896214 PMCID: PMC1539142 DOI: 10.1128/ec.00099-06] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report here a functional analysis of spo5(+)(mug12(+)) of Schizosaccharomyces pombe, which encodes a putative RNA-binding protein. The disruption of spo5(+) caused abnormal sporulation, generating inviable spores due to failed forespore membrane formation and the absence of a spore wall, as determined by electron microscopy. Spo5 regulates the progression of meiosis I because spo5 mutant cells display normal premeiotic DNA synthesis and the timely initiation of meiosis I but they show a delay in the peaking of cells with two nuclei, abnormal tyrosine 15 dephosphorylation of Cdc2, incomplete degradation of Cdc13, retarded formation and repair of double strand breaks, and a reduced frequency of intragenic recombination. Immunostaining showed that Spo5-green fluorescent protein (GFP) appeared in the cytoplasm at the horsetail phase, peaked around the metaphase I to anaphase I transition, and suddenly disappeared after anaphase II. Images of Spo5-GFP in living cells revealed that Spo5 forms a dot in the nucleus at prophase I that colocalized with the Mei2 dot. Unlike the Mei2 dot, however, the Spo5 dot was observed even in sme2Delta cells. Taken together, we conclude that Spo5 is a novel regulator of meiosis I and that it may function in the vicinity of the Mei2 dot.
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Affiliation(s)
- Takashi Kasama
- Department of Molecular Genetics, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Rincón SA, Santos B, Pérez P. Fission yeast Rho5p GTPase is a functional paralogue of Rho1p that plays a role in survival of spores and stationary-phase cells. EUKARYOTIC CELL 2006; 5:435-46. [PMID: 16524899 PMCID: PMC1398058 DOI: 10.1128/ec.5.3.435-446.2006] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The Rho GTPase family and their effectors are key regulators involved in many eukaryotic cell functions related to actin organization and polarity establishment. Schizosaccharomyces pombe Rho1p is essential, directly activates the (1,3)-beta-d-glucan synthase, and participates in regulation of cell wall growth and morphogenesis. Here we describe the characterization of the fission yeast Rho5p GTPase, highly homologous to Rho1p, sharing 86% identity and 95% similarity. Overexpression of the hyperactive allele rho5-G15V causes a morphological effect similar to that of rho1-G15V, but the penetrance is significantly lower, and overexpression of the dominant-negative allele rho5-T20N causes lysis like that of rho1-T20N. Importantly, overexpression of rho5(+) but no other rho genes is able to rescue the lethality of rho1Delta cells. Shutoff experiments indicated that Rho5p can replace Rho1p, but it is not as effective in maintaining cell wall integrity or actin organization. rho5(+) expression is hardly detected during log-phase growth but is induced under nutritional starvation conditions. rho5Delta cells are viable and do not display any defects during logarithmic growth. However, when rho1(+) expression is repressed during stationary phase, rho5Delta cells display reduced viability. Ascospores lacking Rho5p are less resistant to heat or lytic enzymes than wild-type spores. Moreover, h(90) mutant strains carrying the hyperactive rho5-G15V or the dominant-negative rho5-T20N alleles display severe ascospore formation defects. These results suggest that Rho5p functions in a way similar to, but less efficient than, Rho1p, plays a nonessential role during stationary phase, and participates in the spore wall formation.
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Affiliation(s)
- Sergio A Rincón
- Instituto Microbiología-Bioquímica, CSIC/Universidad de Salamanca, Campus Unamuno, 37007 Salamanca, Spain
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Current awareness on yeast. Yeast 2003; 20:1227-34. [PMID: 14609010 DOI: 10.1002/yea.950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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