Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes.

Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes. Research Abstract Details 

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Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes. Abstract Text:

T Kitagawa,Y Kyogoku,T Iizuka,M Ikeda-Saito,T Yamanaka,

Resonance Raman spectra were measured for various C-type cytochromes (mammalian cytochrome c, bacterial cytochrome c3, algal photosynthetic cytochrome f, and alkylated cytochrome c) and a B-type cytochrome (cytochrome b5) in their reduced and oxidized states. (1) For ferrous alkylated cytochrome c, a Raman line sensitive to the replacement of an axial ligand of the heme iron uas found around 1540 cm=1. This ligand-sensitive Raman line indicated the transition from acidic (1545 cm-1) to alkaline (1533 cm-1) forms with pK 7.9. The pH dependence of the Raman spectrum corresponded well to that of the optical absorption spectra. (2) For ferrous cytochrome f, the ligand-sensitive Raman line was found at the same frequency as cytochrome c (1545 cm-1). Accordingly two axial ligands are likely to be histidine and methionine as in cytochrome c. (3) For ferrous cytochrome c3, the frequency of the ligand-sensitive Raman line was between those of cytochrome c and cytochrome b5. Since two axial ligands of the heme iron in cytochrome c3 might be histidines. However, a combination of histidine and methionine as a possible set of two axial ligands was not completely excluded for one or two of the four hemes. (4) In ferrous cytochrome b5, two weak Raman lines appeared at 1302 and 1338 cm-1 instead of the strongest band at 1313 cm-1 of C-type ferrous cytochromes. This suggests the practical use of these bands for the identification of types of cytochromes. The difference in frequency and intensity between B- and C-types of hemes implies that the low effective symmetry of the heme in ferrous cytochrome c is due to vibrational coupling of ring modes with peripheral substituents rather than geometrical disortion of heme.

Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes. Publishing Authors By Initials

T Kitagawa,Y Kyogoku,T Iizuka,M Ikeda-Saito,T Yamanaka,

For similar investigative techniques: chemistry, analytical: spectrum analysis research abstracts see: investigative techniques: chemistry, analytical: spectrum analysis research

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Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biochemistry

VOLUME: 78

Page Numbers: 719-28

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Oct

YEAR: 1975

Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes. Information

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LANGUAGE: eng

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Resonance Raman scattering from hemoproteins. Effects of ligands upon the Raman spectra of various C-type cytochromes. Keywords Mesh Terms:

KEYWORDS: Spectrum Analysis

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Substance Name: Ligands

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Country: JAPAN

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MEDLINETA: J Biochem

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