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  1. Book ; Online ; E-Book: Cyanidioschyzon merolae

    Kuroiwa, Tsuneyoshi / Miyagishima, Shinya / Matsunaga, Sachihiro

    a new model eukaryote for cell and organelle biology

    2017  

    Author's details Tsuneyoshi Kuroiwa, Shinya Miyagishima, Sachihiro Matsunaga editors
    Keywords Life sciences ; Microbiology ; Cell cycle ; Microbial genetics ; Microbial genomics ; Plant physiology
    Subject code 579
    Language English
    Size 1 Online-Ressource (XI, 365 Seiten), Illustrationen
    Publisher Springer
    Publishing place Singapore
    Publishing country Singapore
    Document type Book ; Online ; E-Book
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019693512
    ISBN 978-981-10-6101-1 ; 9789811061004 ; 981-10-6101-7 ; 9811061009
    DOI 10.1007/978-981-10-6101-1
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Erratum to "Mechanisms of organelle division and inheritance and their implications regarding the origin of eukaryotic cells".

    Kuroiwa, Tsuneyoshi

    Proceedings of the Japan Academy. Series B, Physical and biological sciences

    2017  Volume 93, Issue 7, Page(s) 523

    Language English
    Publishing date 2017
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 161781-3
    ISSN 1349-2896 ; 0386-2208
    ISSN (online) 1349-2896
    ISSN 0386-2208
    DOI 10.2183/pjab.93.032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Complete mitochondrial and chloroplast DNA sequences of the freshwater green microalga Medakamo hakoo.

    Takusagawa, Mari / Misumi, Osami / Nozaki, Hisayoshi / Kato, Shoichi / Maruyama, Shinichiro / Tsujimoto-Inui, Yayoi / Yagisawa, Fumi / Ohnuma, Mio / Kuroiwa, Haruko / Kuroiwa, Tsuneyoshi / Matsunaga, Sachihiro

    Genes & genetic systems

    2024  Volume 98, Issue 6, Page(s) 353–360

    Abstract: We report the complete organellar genome sequences of an ultrasmall green alga, Medakamo hakoo strain M-hakoo 311, which has the smallest known nuclear genome in freshwater green algae. Medakamo hakoo has 90.8-kb chloroplast and 36.5-kb mitochondrial ... ...

    Abstract We report the complete organellar genome sequences of an ultrasmall green alga, Medakamo hakoo strain M-hakoo 311, which has the smallest known nuclear genome in freshwater green algae. Medakamo hakoo has 90.8-kb chloroplast and 36.5-kb mitochondrial genomes containing 80 and 33 putative protein-coding genes, respectively. The mitochondrial genome is the smallest in the Trebouxiophyceae algae studied so far. The GC content of the nuclear genome is 73%, but those of chloroplast and mitochondrial genomes are 41% and 35%, respectively. Codon usages in the organellar genomes have a different tendency from that in the nuclear genome. The organellar genomes have unique characteristics, such as the biased encoding of mitochondrial genes on a single strand and the absence of operon structures in chloroplast ribosomal genes. Medakamo hakoo will be helpful for understanding the evolution of the organellar genome and the regulation of gene expression in chloroplasts and mitochondria.
    MeSH term(s) DNA, Chloroplast/genetics ; Microalgae ; Mitochondria/genetics ; Genome, Mitochondrial ; Chloroplasts/genetics ; Chlorophyta/genetics ; Fresh Water ; Phylogeny ; DNA, Mitochondrial/genetics
    Chemical Substances DNA, Chloroplast ; DNA, Mitochondrial
    Language English
    Publishing date 2024-01-23
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1323536-9
    ISSN 1880-5779 ; 1341-7568
    ISSN (online) 1880-5779
    ISSN 1341-7568
    DOI 10.1266/ggs.23-00275
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: 100 years since the discovery of non-Mendelian plastid phenotypes.

    Kuroiwa, Tsuneyoshi

    Journal of plant research

    2010  Volume 123, Issue 2, Page(s) 125–129

    MeSH term(s) DNA, Mitochondrial ; Extrachromosomal Inheritance ; Genome, Plastid ; Phenotype ; Plastids
    Chemical Substances DNA, Mitochondrial
    Language English
    Publishing date 2010-02-05
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2077362-6
    ISSN 1618-0860 ; 0918-9440
    ISSN (online) 1618-0860
    ISSN 0918-9440
    DOI 10.1007/s10265-009-0283-z
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  5. Article ; Online: Review of cytological studies on cellular and molecular mechanisms of uniparental (maternal or paternal) inheritance of plastid and mitochondrial genomes induced by active digestion of organelle nuclei (nucleoids).

    Kuroiwa, Tsuneyoshi

    Journal of plant research

    2010  Volume 123, Issue 2, Page(s) 207–230

    Abstract: In most sexual organisms, including isogamous, anisogamous and oogamous organisms, uniparental transmission is a striking and universal characteristic of the transmission of organelle (plastid and mitochondrial) genomes (DNA). Using genetic, biochemical ... ...

    Abstract In most sexual organisms, including isogamous, anisogamous and oogamous organisms, uniparental transmission is a striking and universal characteristic of the transmission of organelle (plastid and mitochondrial) genomes (DNA). Using genetic, biochemical and molecular biological techniques, mechanisms of uniparental (maternal and parental) and biparental transmission of organelle genomes have been studied and reviewed. Although to date there has been no cytological review of the transmission of organelle genomes, cytology offers advantages in terms of direct evidence and can enhance global studies of the transmission of organelle genomes. In this review, I focus on the cytological mechanism of uniparental inheritance by "active digestion of male or female organelle nuclei (nucleoids, DNA)" which is universal among isogamous, anisogamous, and oogamous organisms. The global existence of uniparental transmission since the evolution of sexual eukaryotes may imply that the cell nuclear genome continues to inhibit quantitative evolution of organelles by organelle recombination.
    MeSH term(s) Biological Evolution ; Cytological Techniques ; DNA, Circular/genetics ; DNA, Circular/metabolism ; Eukaryota/genetics ; Extrachromosomal Inheritance ; Genome, Mitochondrial/genetics ; Genome, Plastid/genetics
    Chemical Substances DNA, Circular
    Language English
    Publishing date 2010-02-10
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2077362-6
    ISSN 1618-0860 ; 0918-9440
    ISSN (online) 1618-0860
    ISSN 0918-9440
    DOI 10.1007/s10265-009-0306-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Mechanisms of organelle division and inheritance and their implications regarding the origin of eukaryotic cells.

    Kuroiwa, Tsuneyoshi

    Proceedings of the Japan Academy. Series B, Physical and biological sciences

    2010  Volume 86, Issue 5, Page(s) 455–471

    Abstract: Mitochondria and plastids have their own DNAs and are regarded as descendants of endosymbiotic prokaryotes. Organellar DNAs are not naked in vivo but are associated with basic proteins to form DNA-protein complexes (called organelle nuclei). The concept ... ...

    Abstract Mitochondria and plastids have their own DNAs and are regarded as descendants of endosymbiotic prokaryotes. Organellar DNAs are not naked in vivo but are associated with basic proteins to form DNA-protein complexes (called organelle nuclei). The concept of organelle nuclei provides a new approach to explain the origin, division, and inheritance of organelles. Organelles divide using organelle division rings (machineries) after organelle-nuclear division. Organelle division machineries are a chimera of the FtsZ (filamentous temperature sensitive Z) ring of bacterial origin and the eukaryotic mechanochemical dynamin ring. Thus, organelle division machineries contain a key to solve the origin of organelles (eukaryotes). The maternal inheritance of organelles developed during sexual reproduction and it is also probably intimately related to the origin of organelles. The aims of this review are to describe the strategies used to reveal the dynamics of organelle division machineries, and the significance of the division machineries and maternal inheritance in the origin and evolution of eukaryotes.
    MeSH term(s) Animals ; Eukaryotic Cells/cytology ; Eukaryotic Cells/metabolism ; Eukaryotic Cells/radiation effects ; Gene Targeting ; Genome/genetics ; Humans ; Light ; Models, Biological ; Organelles/genetics ; Organelles/metabolism ; Organelles/radiation effects ; Reproduction, Asexual/genetics
    Language English
    Publishing date 2010-05-08
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 161781-3
    ISSN 1349-2896 ; 0386-2208
    ISSN (online) 1349-2896
    ISSN 0386-2208
    DOI 10.2183/pjab.86.455
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  7. Article ; Online: Evolutionary significance of the ring-like plastid nucleus in the primitive red alga Cyanidioschyzon merolae as revealed by drying.

    Kuroiwa, Tsuneyoshi / Ohnuma, Mio / Imoto, Yuuta / Yagisawa, Fumi / Misumi, Osami / Nagata, Noriko / Kuroiwa, Haruko

    Protoplasma

    2020  Volume 257, Issue 4, Page(s) 1069–1078

    Abstract: Primary plastids originated from a free-living cyanobacterial ancestor and possess their own genomes-probably a few DNA copies. These genomes, which are organized in centrally located plastid nuclei (CN-type pt-nuclei), are produced from preexisting ... ...

    Abstract Primary plastids originated from a free-living cyanobacterial ancestor and possess their own genomes-probably a few DNA copies. These genomes, which are organized in centrally located plastid nuclei (CN-type pt-nuclei), are produced from preexisting plastids by binary division. Ancestral algae with a CN-type pt-nucleus diverged and evolved into two basal eukaryotic lineages: red algae with circular (CL-type) pt-nuclei and green algae with scattered small (SN-type) pt-nuclei. Although the molecular dynamics of pt-nuclei in green algae and plants are now being analyzed, the process of the conversion of the original algae with a CN-type pt-nucleus to red algae with a CL-type one has not been studied. Here, we show that the CN-type pt-nucleus in the primitive red alga Cyanidioschyzon merolae can be changed to the CL-type by application of drying to produce slight cell swelling. This result implies that CN-type pt-nuclei are produced by compact packing of CL-type ones, which suggests that a C. merolae-like alga was the original progenitor of the red algal lineage. We also observed that the CL-type pt-nucleus has a chain-linked bead-like structure. Each bead is most likely a small unit of DNA, similar to CL-type pt-nuclei in brown algae. Our results thus suggest a C. merolae-like alga as the candidate for the secondary endosymbiont of brown algae.
    MeSH term(s) Biological Evolution ; Cell Nucleus/genetics ; Plastids/genetics ; Rhodophyta/genetics
    Language English
    Publishing date 2020-03-05
    Publishing country Austria
    Document type Journal Article
    ZDB-ID 123809-7
    ISSN 1615-6102 ; 0033-183X
    ISSN (online) 1615-6102
    ISSN 0033-183X
    DOI 10.1007/s00709-020-01496-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  8. Article: [Disagreement between cytology and biochemistry/molecular biology in studies of organelle inheritance--observation].

    Kuroiwa, Tsuneyoshi

    Seikagaku. The Journal of Japanese Biochemical Society

    2008  Volume 80, Issue 3, Page(s) 167–176

    MeSH term(s) Biochemical Phenomena ; Biochemistry ; Cell Biology ; Cell Nucleus Division/genetics ; Chloroplasts/genetics ; DNA, Mitochondrial ; Eukaryotic Cells ; Mitochondria/genetics ; Molecular Biology ; Organelles/genetics
    Chemical Substances DNA, Mitochondrial
    Language Japanese
    Publishing date 2008-03
    Publishing country Japan
    Document type Journal Article ; Review
    ZDB-ID 282319-6
    ISSN 0037-1017
    ISSN 0037-1017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.B 592: Show issues Location:
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  9. Article: Evolutionary significance of the ring-like plastid nucleus in the primitive red alga Cyanidioschyzon merolae as revealed by drying

    Kuroiwa, Tsuneyoshi / Ohnuma, Mio / Imoto, Yuuta / Yagisawa, Fumi / Misumi, Osami / Nagata, Noriko / Kuroiwa, Haruko

    Protoplasma. 2020 July, v. 257, no. 4

    2020  

    Abstract: Primary plastids originated from a free-living cyanobacterial ancestor and possess their own genomes—probably a few DNA copies. These genomes, which are organized in centrally located plastid nuclei (CN-type pt-nuclei), are produced from preexisting ... ...

    Abstract Primary plastids originated from a free-living cyanobacterial ancestor and possess their own genomes—probably a few DNA copies. These genomes, which are organized in centrally located plastid nuclei (CN-type pt-nuclei), are produced from preexisting plastids by binary division. Ancestral algae with a CN-type pt-nucleus diverged and evolved into two basal eukaryotic lineages: red algae with circular (CL-type) pt-nuclei and green algae with scattered small (SN-type) pt-nuclei. Although the molecular dynamics of pt-nuclei in green algae and plants are now being analyzed, the process of the conversion of the original algae with a CN-type pt-nucleus to red algae with a CL-type one has not been studied. Here, we show that the CN-type pt-nucleus in the primitive red alga Cyanidioschyzon merolae can be changed to the CL-type by application of drying to produce slight cell swelling. This result implies that CN-type pt-nuclei are produced by compact packing of CL-type ones, which suggests that a C. merolae–like alga was the original progenitor of the red algal lineage. We also observed that the CL-type pt-nucleus has a chain-linked bead-like structure. Each bead is most likely a small unit of DNA, similar to CL-type pt-nuclei in brown algae. Our results thus suggest a C. merolae–like alga as the candidate for the secondary endosymbiont of brown algae.
    Keywords DNA ; Rhodophyta ; algae ; ancestry ; endosymbionts ; genome ; molecular dynamics ; plastids
    Language English
    Dates of publication 2020-07
    Size p. 1069-1078.
    Publishing place Springer Vienna
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 123809-7
    ISSN 1615-6102 ; 0033-183X
    ISSN (online) 1615-6102
    ISSN 0033-183X
    DOI 10.1007/s00709-020-01496-y
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Genomic analysis of an ultrasmall freshwater green alga, Medakamo hakoo.

    Kato, Shoichi / Misumi, Osami / Maruyama, Shinichiro / Nozaki, Hisayoshi / Tsujimoto-Inui, Yayoi / Takusagawa, Mari / Suzuki, Shigekatsu / Kuwata, Keiko / Noda, Saki / Ito, Nanami / Okabe, Yoji / Sakamoto, Takuya / Yagisawa, Fumi / Matsunaga, Tomoko M / Matsubayashi, Yoshikatsu / Yamaguchi, Haruyo / Kawachi, Masanobu / Kuroiwa, Haruko / Kuroiwa, Tsuneyoshi /
    Matsunaga, Sachihiro

    Communications biology

    2023  Volume 6, Issue 1, Page(s) 89

    Abstract: Ultrasmall algae have attracted the attention of biologists investigating the basic mechanisms underlying living systems. Their potential as effective organisms for producing useful substances is also of interest in bioindustry. Although genomic ... ...

    Abstract Ultrasmall algae have attracted the attention of biologists investigating the basic mechanisms underlying living systems. Their potential as effective organisms for producing useful substances is also of interest in bioindustry. Although genomic information is indispensable for elucidating metabolism and promoting molecular breeding, many ultrasmall algae remain genetically uncharacterized. Here, we present the nuclear genome sequence of an ultrasmall green alga of freshwater habitats, Medakamo hakoo. Evolutionary analyses suggest that this species belongs to a new genus within the class Trebouxiophyceae. Sequencing analyses revealed that its genome, comprising 15.8 Mbp and 7629 genes, is among the smallest known genomes in the Viridiplantae. Its genome has relatively few genes associated with genetic information processing, basal transcription factors, and RNA transport. Comparative analyses revealed that 1263 orthogroups were shared among 15 ultrasmall algae from distinct phylogenetic lineages. The shared gene sets will enable identification of genes essential for algal metabolism and cellular functions.
    MeSH term(s) Phylogeny ; Genome ; Chlorophyta/genetics ; Genomics ; Fresh Water
    Language English
    Publishing date 2023-01-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2399-3642
    ISSN (online) 2399-3642
    DOI 10.1038/s42003-022-04367-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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