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  • Title: Resonance Raman detection of a v(Fe-CO) stretching frequency in cytochrome P-450scc from bovine adrenocortical mitochondria.
    Author: Tsubaki M, Ichikawa Y.
    Journal: Biochim Biophys Acta; 1985 Mar 01; 827(3):268-74. PubMed ID: 3970939.
    Abstract:
    Resonance Raman scattering experiments on CO-complexed cytochrome P-450scc from bovine adrenocortical mitochondria demonstrate the simultaneous enhancement of v(Fe-CO) stretching and bound v(C-O) stretching frequencies at 477 and 1953 cm-1, respectively. These assignments were made on the basis of frequency shifts with the isotope 12C18O. This unusually low v(Fe-CO) stretching frequency in cytochrome P-450scc, compared with other CO-complexed hemoproteins such as CO-hemoglobin and -myoglobin, is presumably due to the thiolate ligation to the heme iron trans to CO and due to the linear and perpendicular configuration of CO binding to the heme.
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