• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

PHYSIOLOGICAL ROLES OF TWO GLUCOSE UPTAKE PATHWAYS DURING GROWTH PHASEIN ESCHERICHIA COLI

Research Project

Project/Area Number 04808030
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 代謝生物化学
Research InstitutionYAMAGUCHI UNIVERSITY

Principal Investigator

YAMADA Mamoru  YAMAGUCHI UNIVERSITY DEPARTMENT : BIOLOGICAL CHEMISTRY, FACULTY OF AGRICULTURE, 農学部, 助教授 (30174741)

Co-Investigator(Kenkyū-buntansha) YAMADA Yasue  YAMAGUCHI UNIVERSITY DEPARTMENT : PHARMACOLOGY, SCHOOL OF MEDICINE, 医学部, 助手 (00166737)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsGlucose dehydrogenase / gcd gene / cAMP-CRP / Fnr / Phosphotransferase system / PTS / CAM8-CRP
Research Abstract

Several bacteria including Escherichia coli have two glucose uptake pathways. One is a glucose dehydrogenase-linked gluconate transport system in which glucose is directly oxidized in the periplasm and the produced electrons are transferred to the respiratory chain to form electrochemical gradients across the cytoplasmic membrane. The other is a phosphotransferase system by which glucose is phosphorylated and concomitantly transferred into the cytoplasm. In this study, we investigated to clarify thje physiological roles of the two systems in the different growth phases in E.coli.
The results are summarized as follows. 1) Analysis of the gcd gene encoding glucose dehydrogenase and the topological structure of the product revealed that the protein possesses 5 membrane-spanning segments at the N-terminus and the C-terminal 5/6 portion in the periplasm which catalyzes glucose oxidation. 2) the gcd gene is regulated negatively by cAMP-CRP and Fnr.Especially, the binding of two Fnr proteins t … More o different sites leads DNA bending to repress the transcription. 3) The binding sites of these two factors were determined by site-specific mutagenesis. 4) Gene-disrupted mutant of the gcd gene was constructed to define roles of glucose dehydrogenase for the E.coli growth. The gcd mutant was clearly grown slower than the wild type. The growth was also compared with those of pts^- and gcd^-pts^-. The results suggested that glucose dehydrogenase promote the E.coli growth.
On the basis of the facts that the component genes of PTS are regulated positively by cAMP-CRP, and the intracellular concentration of cAMP is low at the early growth phase and high at the late growth phase, it is likely that the GDH system is expressed at the early growth phase and form electrochemical gradients requred for import of nutrients and synthesis of macromolecules such proteins. On the other hand, the PTS system seems to be expressed at the late growth phase to perform the rational metabolizm of glucose. Thus, the both systems may share the role of the glucose metabolizm during the E.coli growth. Less

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] M.Yamada et al: "Characterization of the gcd gene from Escherichia coli K-12 W3110 and regulation of its expression." J.Bacteriol.175. 568-571 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Yamada et al: "Topological analysis of quinoprotein glucose dehydrogenase in Escherichia coli and its ubiquinone-binding site." J.Biol.Chem.268. 12812-12817 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.A.Talukder et al: "Analysis of products of the Escherichia coli genomic genes and regulation of their expressions:an applicable procedure for genomic analysis of other microorganisms." Biosci.Biotech.Biochem.58. 117-120 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Yamada, S.Asaoka, M.H.Saier, Jr., and Y.Yamada: "Charcterization of the gcd gene from Escherichia coli K-12 W3110 and regulation of its expression" J.Bacteriol.175. 568-571 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Yamada, K.Sumi, K.Matsushita, O.Adachi, and Y.Yamada: "Topological analysis of quinoprotein glucose dehydrogenase in Escherichia coli and its ubiquinone-binding site" J.Biol.Chem.268. 12812-12817 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.A.Talukder, S.Yanai, and M.Yamada: "Analysis of products of the Escherichia coli genomic genes and regulation of their expressions : an applicable procedure for genomic analysis of other microorganisms" Biosci.Biotech.Biochem.58. 117-120 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Yamada,S.Asaoka,M.H.Saier,Jr.,and Y.Yamada.: "Characterization of the gcd gene from Escherichia coli K-12 W3110 and regulation of its expression." J.Bacteriol.175. 568-571 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Yamada,K.Sumi,K.Matsushita,O.Adachi,and Y.Yamada.: "Topological analysis of quinoprotein glucose dehydrogenase in Escherichia coli and its ubiquinone-binding site." J.Biol.Chem.268. 12812-12817 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.A.Talukder,S.Yanai,and M.Yamada.: "Analysis of products of the Escherichia coli genomic genes and regulation of their expressions." Biosci.Biotech.Biochem.58. 117-120 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Mamoru Yamada et al.: "Characterization of the gcd gene from Escherichia coli K‐12 W3110 and regulation of its expression" Journal of Bacteriology. 175. 568-571 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Mamoru Yamada et al.: "Topological analysis of quinoprotein glucose dehydrogenase in Escherichia coli and its ubiquinone‐binding site" The Journal of Biological Chemistry.

    • Related Report
      1992 Annual Research Report

URL: 

Published: 1992-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi