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Expression of Liver/Bone/Kidnet-type alkaline phosphatase and metabolism of bone

Research Project

Project/Area Number 06404065
Research Category

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

Allocation TypeSingle-year Grants
Research Field Functional basic dentistry
Research InstitutionNiigata University

Principal Investigator

ODA Kimimitsu  Niigata University School of Dentisry ; Professor, 歯学部, 教授 (10122681)

Co-Investigator(Kenkyū-buntansha) IGARASHI Atsuko  Niigata University School of Dentisry ; Assistant Investigator, 歯学部, 教務職員 (90168097)
TAKAHASHI Tokuya  Niigata University School of Dentisry ; Associate Professor, 歯学部, 助教授 (50018420)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥17,400,000 (Direct Cost: ¥17,400,000)
Fiscal Year 1995: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1994: ¥12,100,000 (Direct Cost: ¥12,100,000)
Keywordsalkaline phosphatase / glycosylphosphatidylinositol / bone / placenta / chaperone / Bip / GRP78 / membrane protein / ER-retrieval signal / 骨アルカリホスファターゼ / GPIアンカー / 膜結合型酵素 / キメラ蛋白質 / トランスフェクション
Research Abstract

A chimeric protein (alphaGL-PLAP) consisting of alpha_<2u>-globulin (alphaGL)fused in frame to a COOH-terminal propeptide derived from placental alkaline phosphatase (PLAP) was constructed and expressed transiently in the COS-1 cell. Immunofluorescence study and digestion with phosphatidylinositol-specific phospholipase Cdemonstrated that the chimeric protein is anchored on thecell surface via a glycosylphosphatidylinositol (GPI). These results indicate that the COOH-terminal propeptide of PLAP serves as a GPI-anchor signal and render an otherwise soluble protein a GPI-linked membrane-bound protein. In contrast, a mutant chimeric protein (alphaGL-PLAP) in which Asp159 was replaced with Trp using a site-directed mutagenesis failed to be cleaved and modified by GPI.Immunoelectron microscopic observation revealed that the mutant chimeric protein never appeared on the cell surface and was retained in the endoplasmic reticulum (ER) and nuclear envelope . Immunoprecipitation with antibody ag … More ainst an ER-retrieval signal KDEL showed that prochimeric protein with either a cleavable or an uncleavable propeptide, but not a GPI-linked mature form, was associated with Bip/GRP78, an ER resident molecular chaperone. Pulse-chase experiment showed that the mutant chimeric protein remained associated with Bip/GRP78 throughout the experiment and eventually was degraded in the ER (or its subcompartment). Thus retention by Bip/GRP78 and degradation of the mutant chimeric protein in the pre-Golgi compartment ensure that only the wild type chimericprotein leave the ER.A chimeric protein consisting of alphaGL and COOH-terminal 30 amino acids derived from liver/bone/kidney type alkaline phosphatase (BALP) was also found to be anchored onthe cell surface when the chimeric protein was expressed in the COS-1 cell, indicating that the chimeric protein contains a cleavage/attachment site of GPI of BALP in a COOH-terminal 30 amino acids length. We are currently identifying the cleavage/attachment site of GPI of BALP by means of a series of site-directed mutagenesis experiments. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Oda,K.et al.: "Conversion of secretory proteins into membrane proteins by fusing with a glycosylphsophatidylinositol anchor signal of alkaline phsophatase" Biochem.J.301. 577-583 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nishimura,Y.et al.: "Intracellular sorting of lysosomal b-glucuronidase is altered due to administration of dibutylphosphate" J.Biochem.118. 46-55 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Oda,K.et al.: "Bip/GRP78 but not calnexin associates with a precursor of glycosyl-phosphatidylinositol anchored protein" Biochem.J.(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Oda,K.et al.: "Lactacystin,an inhibitor of the proteasome,blocks the degradation of a mutant precursor of glycosylphosphatidylinositol-linked protein in a pre-Golgi compartment" Biochem.J.(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Oda, K., Cheng J., Saku, T., et al.: "Conversion of secretory proteins into membrane proteins by fusing with a glycosylphosphatidylinositol anchor signal of alkaline phosphatase" Biochem.J.301. 577-583 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nishimura, Y., Kata, K., Oda, K., et al: "Intracellular sorting of lysosomal beta-glucuronidase is altered due to administration of dibutylphosphate" J.Biochem.118. 46-55 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Oda, K., Wada, I., Takami, N., et al.: "Bip/GRP78 but not calnexin associates with a precursor of glycosylphosphatidylinositol-anchored protein" Biochem.J.(in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Oda, K., Ikehara, Y,and Omura, S.: "Lactacystin, an inhibitor of theproteasome, blocks the degradation of a mutant precursor of glycosylphosphatidylinositol-linked protein in a pre-Golgi compartment" Biochem.Biophys.Res.Commun.(in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Oda,K.et al.: "Conversion of secretory protein in to membrane proteins by fusing with a glycosyl-phosphatidylinositol anchor signal of alkaline phosphatase" Biochem.J.301. 577-583 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Nishimura,Y.et al.: "Intracellular sorting of lysosomal β-glucuronidase is altered due to administration of dibutylphosphate" J.Biochem.118. 46-55 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Oda,K.et al.: "Bip/GRP78 but not calnexin associates with a precursor of glycosylphosphatidyl-inositol anchored protein" Biochem.J.(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Oda,K.et al.: "Lactacystin,an inhibitor of the proteasome,blocks the degradation of a mutant precursor of glycosylphosphatidylinositol-linked protein in a pre-Golgi compartment" Biochem.Biophys.Res.Commun.(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] K.Oda: "Conversion of secretory proteins into membrane proteins by fusing with a glycosylphosphatidylinositol anchor of alkaline phophatase" Biochem.J.301. 577-583 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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