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Identification of enzymes related to metabolism of useful compounds in brown algae

Research Project

Project/Area Number 16H04977
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Aquatic life science
Research InstitutionHokkaido University

Principal Investigator

INOUE AKIRA  北海道大学, 水産科学研究院, 准教授 (70396307)

Co-Investigator(Kenkyū-buntansha) 尾島 孝男  北海道大学, 水産科学研究院, 教授 (30160865)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywords褐藻類 / 多糖類 / アルギン酸 / カロテノイド / リコペン / β-カロテン / 酵素 / マンヌロン酸C5-エピメラーゼ / アルギン酸リアーゼ / キサントフィル
Outline of Final Research Achievements

Brown algae biosynthesize unique polysaccharides and carotenoids that are rarely found in other organisms. It has been reported that some of these components exhibit interesting physiological activities that are useful for human beings. Therefore, these compounds have been drawing attention. Although some candidate enzymes involving these biosynthesis pathways have been predicted through massive gene researches of brown algae, there is poor information on functional enzymes at the protein level. In this study, we elucidated the functions of mannuronate C5-epimerase, which is involved in the sequencing of the polysaccharide alginate, and the function of alginate-degrading enzymes of brown algae, whose existence could not be found at the gene level. We also produced a lycopene-synthesizing Escherichia coli and it was used for functional identification of an enzyme involving β-carotene biosynthesis in brown algae.

Academic Significance and Societal Importance of the Research Achievements

本研究では、褐藻の複数の有用酵素について、活性をもつ組換え酵素としての生産に成功した。特に、マンヌロン酸C5-エピメラーゼは、異種細胞発現が困難とされており、酵素活性を明らかにした報告は無かった。同酵素は、有用多糖類のアルギン酸の配列を人工的に改変するテーラーメイドアルギン酸技術の開発に必須の酵素であるが、本研究成果はその進展に密接につながるものである。また、褐藻のカロテノイド生合成関連酵素について機能を実証した例は無かったが、組換え大腸菌を低温培養し、リコペンをβ-カロテンに変換する褐藻由来酵素の活性を明らかにした。これは、本法が褐藻のカロテノイド生合成経路解明に有効であることを示している。

Report

(4 results)
  • 2019 Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (10 results)

All 2019 2018 2017 2016

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Functional identification of alginate lyase from the brown alga Saccharina japonica2019

    • Author(s)
      Akira Inoue, Takao Ojima
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1

    • DOI

      10.1038/s41598-019-41351-6

    • NAID

      120006620600

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complementary DNA cloning and functional analysis of lycopene β-cyclase in the brown alga Undaria pinnatifida2019

    • Author(s)
      Akira Inoue, Toshiyuki Iwayama, Takao Ojima
    • Journal Title

      Fisheries Science

      Volume: 40 Issue: 4 Pages: 717-729

    • DOI

      10.1007/s12562-019-01314-2

    • NAID

      40021934587

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of PL-7 alginate lyases from marine organisms and their application2018

    • Author(s)
      Akira Inoue
    • Journal Title

      Methods in Enzymology

      Volume: 604

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Functional heterologous expression and characterization of mannuronan C5-epimerase from the brown alga Saccharina japonica2016

    • Author(s)
      Akira Inoue, Aya Satoh, Mio Morishita, Yuko Tokunaga, Takuya Miyakawa, Masaru Tanokura, Takao Ojima
    • Journal Title

      Algal Research

      Volume: 16 Pages: 282-291

    • DOI

      10.1016/j.algal.2016.03.030

    • NAID

      120006470955

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] 褐藻類のアルギン酸由来不飽和単糖還元酵素2019

    • Author(s)
      井上 晶、西山竜士、尾島孝男
    • Organizer
      平成31年度日本水産学会春季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 褐藻類リコペンβシクラーゼのcDNAクローニングと機能同定2018

    • Author(s)
      岩山俊幸、井上 晶、尾島孝男
    • Organizer
      平成30年度日本水産学会春季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 褐藻類リコペンβシクラーゼの性状解析2018

    • Author(s)
      井上 晶、岩山俊幸、尾島孝男
    • Organizer
      第20回マリンバイオテクノロジー学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Functional identification of brown algal lycopene β-cyclase2018

    • Author(s)
      Akira Inoue, Toshiyuki Iwayama, Takao Ojima
    • Organizer
      The 8th International Conference on Algal Biomass, Biofuels and Bioproducts
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 褐藻類のアルギン酸分解酵素の同定と性状解析2018

    • Author(s)
      井上晶、尾島孝男
    • Organizer
      平成30年度日本水産学会春季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 難分解性多糖関連酵素-アルギン酸修飾酵素-2017

    • Author(s)
      井上 晶
    • Organizer
      平成29年度日本水産学会春季大会
    • Place of Presentation
      東京海洋大学(東京都港区)
    • Year and Date
      2017-03-26
    • Related Report
      2016 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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