The effect of ligand field strength on nonresonance Raman characteristics of hemoproteins

Toru Johjima, Hiroyuki Wariishi, Hiroo Tanaka

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

A series of hemoproteins were characterized using Raman spectroscopic technique under non-resonant (near-infrared excited) conditions. All the proteins used in this study contain an iron-protoporphyrin IX with a coordinated histidine as a proximal ligand. Hemoproteins exhibited a near-infrared Raman shift at 1372 cm-1, only when heme was in the ferric state, while the peak completely disappeared when heme iron was reduced. The intensity of this peak was weakened upon the coordination of electron-donating ligands to heme iron. Therefore, the characteristics of this peak are different from the oxidation marker band assigned by the resonance Raman spectroscopy, rather, the intensity is strongly related to the sixth ligand field strength. In addition, the peak intensity may also reflect the distance between heme iron and the sixth ligand.

本文言語英語
ページ(範囲)601-606
ページ数6
ジャーナルBiochemical and Biophysical Research Communications
226
3
DOI
出版ステータス出版済み - 9 24 1996

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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