Carotenoid stoichiometry in the LH2 crystal: No spectral evidence for the presence of the second molecule in the alpha/beta-apoprotein dimer

Gall, A., Gardiner, A. T., Cogdell, R. J. and Robert, B. (2006) Carotenoid stoichiometry in the LH2 crystal: No spectral evidence for the presence of the second molecule in the alpha/beta-apoprotein dimer. FEBS Letters, 580(16), pp. 3841-3844. (doi:10.1016/j.febslet.2006.06.005)

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Abstract

In this work we have investigated the carotenoid–protein interactions in LH2 complexes of <i>Rhodopseudomonas acidophila</i> both in “free in solution” mixed-micelles and in three-dimensional crystals by Raman spectroscopy in resonance with the carotenoid (Car) molecules. We show that the Car molecules when bound to their binding pockets show no significant differences when the complexes are “free in solution” or packed in crystalline arrays. Furthermore, there is no significant wavelength dependence in the Raman spectrum of the Car molecules of LH2. This indicates that there is only one Car configuration in LH2 and thus only one molecule per α/β-heterodimer.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cogdell, Professor Richard
Authors: Gall, A., Gardiner, A. T., Cogdell, R. J., and Robert, B.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:FEBS Letters
Publisher:Elsevier
ISSN:0014-5793
ISSN (Online):1873-3468
Published Online:15 June 2006

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