Fluorescence study of the conformational properties of myoglobin structure. 2. pH- and ligand-induced conformational changes in ferric- and ferrousmyoglobins.

作者: Galina B. POSTNIKOVA , Yuri E. KOMAROV , Elena M. YUMAKOVA

DOI: 10.1111/J.1432-1033.1991.TB16006.X

关键词: StereochemistryBiophysicsHemeProtein structureHemeproteinFluorescence spectrometryFluorescence anisotropyLigand (biochemistry)ChemistryMyoglobinMetmyoglobin

摘要: Myoglobin is known to be the reference protein that why knowledge of conformational behavior myoglobin-like structure common importance for understanding mechanism functioning. In this work fluorescence was used study pH- and ligand-induced changes in sperm whale myoglobin related structures — apomyoglobin (apo-Mb) complex apo-Mb with protoporphyrin IX (PPIX-apo-Mb) which a iron-free analog Mb. The structural at N-terminal adjacent region were followed by two invariant tryptophans A-helix, Trp7(A5) Trpl4(A12), while those “active site”, heme crevice, emission PPIX. As distinct from non-fluorescing heme, PPIX has an extensive visible spectral region.

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