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

Study on the reaction mechanism of peroxidase based on its tertiary structure

Research Project

Project/Area Number 06680654
Research Category

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

Allocation TypeSingle-year Grants
Research Field Biophysics
Research InstitutionOsaka University

Principal Investigator

FUKUYAMA Keiichi  Osaka University, Department of Biology Professor, 理学部, 教授 (80032283)

Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsPeroxidase / X-ray crystallographic analysis / Three-dimensional structure of protein / Coordination structure of heme iron
Research Abstract

1. Sequences of genomic DNA and cDNA coding for Arthromyces ramosus peroxidase (ARP) have been determined. The mature ARP consists of 344 amino acids with N-terminal pyroglutamic acid preceded by a signal peptide of 20 amino acid residues.
2. High resolution structures of cyanide- and triiodide-bound forms of ARP have shown that on ligand binding the conformation of the distal histidine changed markedly but that of distal arginine changed little. The heme iron in the cyanide complex (low-spin ferric) is located on the heme plane, whereas the iron in the triiodide complex (high-spin ferric) is displaced from the plane about 0.2A toward the proximal side.
3. Spectroscopic and crystallographic studies have shown that under physiological conditions the heme iron of ARP is in the pentacoordinated high-spin state and that at high pH the heme iron is able to bind ammonia forming the low-spin state. Comparison of the geometries around the water molecules at the distal side of the heme in peroxidases has suggested that the location of the water molecule is dominated by the orientation of the imidazole ring of the distal histidine rather than by interaction with the heme iron.
4. Two proposed calcium sites have been confirmed by X-ray anomalous scattering technique.

Report

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

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 国島直樹: "糸状菌ペルオキシダーゼの構造と機能" バイオサイエンスとインダストリー. 53. 857-863 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N. Kunishima: "Pentacoordination of the heme iron of Arthromyces ramosus peroxidase shown by a 1.8Å resolution crystallographic study at pH4.5" FEBS Letters. 378. 291-294 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N.Kunishima, F.Ameda, K.Fukuyama, M.Kawamoto, T.Matsunaga, H.Matsubara: "Pentacoordination of the heme iron of Arthromyces ramosus percxidase shown by a 1.8A resolution crystallographic study at pH 4.5" FEBS Letters. 378. 291-294 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 国島直樹: "糸状菌ペルオキシダーゼの構造と機能" バイオサイエンスとインダストリー. 53. 857-863 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] N.Kunishima: "Peutocoordination of the heme iron of Arthromyces ramosus perxidase shown by a 1.8Å resolution crystallographic study at pH4.5" FEBS Letters. 378. 291-294 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 福山恵一: "ペルオキシダーゼの立体構造" 日本農芸化学会誌. 68. 1697-1700 (1994)

    • Related Report
      1994 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi