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Study on evolution of trichocyst in cryptomonads

Research Project

Project/Area Number 25840128
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Evolutionary biology
Research InstitutionNational Institute for Environmental Studies (2015)
Kobe University (2013-2014)

Principal Investigator

Yamagishi Takahiro  国立研究開発法人国立環境研究所, 環境リスク研究センター, 特別研究員 (30379333)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsAlgae / Molecular Evolution / Molecular evolution / 細胞内共生 / 藻類
Outline of Final Research Achievements

Trichocysts are ejectile organelles found in cryptomonads, dinoflagellates and peniculine ciliates. The fine structure of trichocysts differs considerably among lineages, and their evolutionary relationships are unclear.We concluded that cryptomonad trichocysts have an evolutionary origin independent from the peniculine ciliate trichocysts based on the biochemical makeup of the trichocyst constituents.
Pyramimonas parkeae (Prasinophyceae) has an ejective organelle containing a coiled ribbon structure resembling the ejectisome in Cryptophyta. This structure is discharged from the cell by a stimulus and extends to form a tube-like structure, but the molecular components of the structure have not been identified. We concluded that the ribbon-like structure of P. parkeae constitutes a complex of core histones (H3, H2A, H2B and H4) and acidic polysaccharide. This is the first report to indicate that core histones form a complex associated with a non-DNA acidic polymer.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (9 results)

All 2015 2014 2013 Other

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Acknowledgement Compliant: 1 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] Aribbon-like structure in the ejective organelle of green microalga Pyramimonas parkeae (Prasinophyceae) consists of core histones and polymers containing N-acetyl-glucosamine.2015

    • Author(s)
      Yamagishi T. and Kawai H.
    • Journal Title

      Protist

      Volume: 166 Issue: 5 Pages: 522-533

    • DOI

      10.1016/j.protis.2015.08.003

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Ubiquitous distribution of helmchrome in phototactic swarmers of the stramenopiles.2015

    • Author(s)
      Fu G., Nagasato C., Yamagishi T., Kawai H., Okuda K., Yoshitake T., Horiguchi T., Motomura T.
    • Journal Title

      Protplasma

      Volume: 253 Issue: 3 Pages: 929-941

    • DOI

      10.1007/s00709-015-0857-7

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis2015

    • Author(s)
      Kawai H., Hanyuda T., Yamagishi T., Kai A., Lane C.E., McDevit D., Küpper F.C. and Saunders G.W.
    • Journal Title

      Journal of Phycology

      Volume: 51 Issue: 5 Pages: 910-917

    • DOI

      10.1111/jpy.12331

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparative transcriptome analysis of Discosporangium mesarthrocarpum (Phaeophyceae), Shizocladia ischiensis (Schizocladiophyceae), and Phaeothamnion confervicola (Phaeothamniophyceae), with special reference to cell wall-related genes2014

    • Author(s)
      Yamagishi, T., Müller, D. G., Kawai, H
    • Journal Title

      Journal of Phycology

      Volume: 未定 Issue: 3 Pages: 543-551

    • DOI

      10.1111/jpy.12190

    • Related Report
      2014 Research-status Report 2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] A pilot-scale floating closed culture system for the multicellular cyanobacterium Arthrospira platensis NIES-032014

    • Author(s)
      Toyoshima, M., Yamagishi, T., Aikawa, S., Kondo, A., Kawai, H.
    • Journal Title

      J. Appl. Phycol.

      Volume: 27 Issue: 6 Pages: 0-0

    • DOI

      10.1007/s10811-014-0484-2

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Direct conversion of Spirulina to ethanol without pretreatment or enzymatic hydrolysis processes.2013

    • Author(s)
      Aikawa S, Joseph A, Yamada R, Izumi Y, Yamagishi T, Matsuda F, Kawai H, Chang JS, Hasunuma T, Kondo A.
    • Journal Title

      Energy Environ. Sci.

      Volume: 6 Issue: 6 Pages: 1844-1849

    • DOI

      10.1039/c3ee40305j

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] プラシノ藻Pyramimonas parkeaeにおけるエジェクトソーム様構造の分子同定:ヒストンと酸性多糖の重合体から成る新奇ポリマー2015

    • Author(s)
      山岸隆博・川井浩史
    • Organizer
      日本藻類学会第39回大会
    • Place of Presentation
      九州大学箱崎キャンパス
    • Year and Date
      2015-03-20 – 2015-03-22
    • Related Report
      2014 Research-status Report
  • [Presentation] Comparative transcriptome analysis of Discosporangium mesarthrocarpum (Phaeophyceae), Shizocladia ischiensis (Schizocladiophyceae), and Phaeothamnion confervicola (Phaeothamniophyceae), with special reference to cell wall-related genes.2014

    • Author(s)
      Yamagishi, T., Müller, D. G., Kawai, H.
    • Organizer
      Ectocarpus 2014
    • Place of Presentation
      Kobe, Japan
    • Related Report
      2013 Research-status Report
  • [Presentation] クリプト藻綱Pyrenomonas helgolandiiおよびプラシノ藻綱Pyramimonas parkeaeでみられるエジェクトソーム関連タンパク質の同定

    • Author(s)
      山岸隆博・川井浩史
    • Organizer
      日本藻類学会第38回大会
    • Place of Presentation
      船橋
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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