title: Laser Raman spectra of oxidized hydroperoxidases.
abstract: Resonance Raman spectra of oxidized hydroperoxidases are examined for shifts in the structure-sensitive, anomalously polarized bands; these are found, respectively, at 1576, 1567 and 1570 cm-1 in the high-spin resting enzymes: horse radish peroxidase, horse blood catalase, and cytochrome c peroxidase. In compound II of horse radish peroxidase and horse blood catalase, and in the enzyme-substrate complex of cytochrome c peroxidase, this band appears at 1587-1590 cm-1 and indicates the iron atom is now in-plane with the porphyrin ring. Weak Raman scattering found with horse radish peroxidase I is consistant with a porphyrin eta-cation radical formulation.
mesh_terms: D000818:Animals; D002374:Catalase / Q000097:blood; D004912:Erythrocytes / Q000201:enzymology; D006735:Horseradish Peroxidase; D006736:Horses; D007834:Lasers; D010544:Peroxidases; D011487:Protein Conformation; D012542:Scattering, Radiation; D013057:Spectrum Analysis
chemical_list: D006735:Horseradish Peroxidase; D010544:Peroxidases; D002374:Catalase