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Journal Article
Fourier transform infrared (FTIR) spectroscopy
2009
Overview
Fourier transform infrared (FTIR) spectroscopy probes the vibrational properties of amino acids and cofactors, which are sensitive to minute structural changes. The lack of specificity of this technique, on the one hand, permits us to probe directly the vibrational properties of almost all the cofactors, amino acid side chains, and of water molecules. On the other hand, we can use reaction-induced FTIR difference spectroscopy to select vibrations corresponding to single chemical groups involved in a specific reaction. Various strategies are used to identify the IR signatures of each residue of interest in the resulting reaction-induced FTIR difference spectra. (Specific) Isotope labeling, site-directed mutagenesis, hydrogen/deuterium exchange are often used to identify the chemical groups. Studies on model compounds and the increasing use of theoretical chemistry for normal modes calculations allow us to interpret the IR frequencies in terms of specific structural characteristics of the chemical group or molecule of interest. This review presents basics of FTIR spectroscopy technique and provides specific important structural and functional information obtained from the analysis of the data from the photosystems, using this method.
Publisher
Springer Netherlands,Springer Nature B.V,Springer Verlag
Subject
/ Biomedical and Life Sciences
/ Fourier transform infrared spectroscopy
/ Ligands
/ Metals
/ methods
/ Photosynthetic Reaction Center Complex Proteins
/ Photosynthetic Reaction Center Complex Proteins - metabolism
/ Review
/ Spectroscopy, Fourier Transform Infrared
