Investigations of the Low-Frequency Spectral Density of Cytochrome c upon Equilibrium Unfolding
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چکیده
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Although the denaturant-induced unfolding transition of cytochrome c was initially thought to be a cooperative process, recent spectroscopic studies have shown deviations from two-state behavior consistent with accumulation of an equilibrium intermediate. However, little is known about the structural and thermodynamic properties of this state, and whether it is stabilized by the presence of non...
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Femtosecond vibrational coherence spectroscopy is used to investigate the low frequency vibrational dynamics of the electron transfer heme protein, cytochrome c (cyt c). The vibrational coherence spectra of ferric cyt c have been measured as a function of excitation wavelength within the Soret band. Vibrational coherence spectra obtained with excitation between 412 and 421 nm display a strong m...
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چکیده ندارد.
15 صفحه اولInvestigations of heme distortion, low-frequency vibrational excitations, and electron transfer in cytochrome c.
Cytochrome (cyt) c is an important electron transfer protein. The ruffling deformation of its heme cofactor has been suggested to relate to its electron transfer rate. However, there is no direct experimental evidence demonstrating this correlation. In this work, we studied Pseudomonas aeruginosa cytochrome c551 and its F7A mutant. These two proteins, although similar in their X-ray crystal str...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2013
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp404881k