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Title: Time-resolved step-scan Fourier transform infrared investigation of heme-copper oxidases: implications for O 2 input and H 2O/H + output channels
Authors: Koutsoupakis, Constantinos 
Pinakoulaki, Eftychia 
Stavrakis, Stavros 
Daskalakis, Evangelos 
Varotsis, Constantinos 
Keywords: Fourier transform infrared spectroscopy;Heme;Copper;Mammals;Pseudomonas;Oxygen;Molecular dynamics
Category: Chemical Sciences
Field: Natural Sciences
Issue Date: 12-Apr-2004
Publisher: Elsevier
Source: Biochimica et biophysica acta - bioenergetics, 2004, Volume 1655, Issue 1-3, Pages 347-352
Abstract: We have applied FTIR and time-resolved step-scan Fourier transform infrared (TRS 2-FTIR) spectroscopy to investigate the dynamics of the heme-Cu B binuclear center and the protein dynamics of mammalian aa 3, Pseudomonas stutzeri cbb 3, and caa 3 and ba 3from Thermus thermophilus cytochrome oxidases. The implications of these results with respect to (1) the molecular motions that are general to the photodynamics of the binuclear center in heme-copper oxidases, and (2) the proton pathways located in the ring A propionate of heme a 3-Asp372- H 2O site that is conserved among all structurally known oxidases are discussed
ISSN: 00052728
Rights: © 2004 Elsevier B.V. All rights reserved
Type: Article
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