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Title: Protein dynamics and spectroscopy for ferryl intermediate of cytochrome c oxidase: a molecular dynamics approach
Authors: Farantos, Stavros C. 
Varotsis, Constantinos 
Daskalakis, Vangelis 
Farantos, Stavros C. 
Keywords: Raman spectroscopy;Proteins;Cytochrome oxidase;Molecular dynamics
Issue Date: 2007
Source: International conference on computational methods in science and engineering, ICCMSE 2007; Corfu; 25 September 2007 through 30 September 2007
Abstract: Cytochrome c oxidase is the membrane bound terminal enzyme in the respiratory chain. Molecular oxygen is reduced to water in its heme Fe/Cu B active site. The O-O bond cleavage produces the ferryl-oxo (Fe IV=O) intermediate. Molecular Dynamics calculations for a part of the protein containing over 8600 atoms are employed to probe the frequencies of vibrational modes which involve the stretching of Fe-O during protonation/deprotonation events near the active site. The role of protein frame for the spectroscopic properties of the ferryl intermediate is proved to be significant, as the intensity of the oxygen sensitive bands is controlled by conformational changes. In addition, the mechanism of the release of the produced water molecules is examined by changing the protonation state of a residue in the entrance of a proton pathway in the enzyme
DOI: 10.1063/1.2836073
Rights: © 2007 American Institute of Physics
Type: Conference Papers
Affiliation: University of Crete 
Appears in Collections:Δημοσιεύσεις σε συνέδρια /Conference papers - poster -presentation

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