Dresden 2017 – wissenschaftliches Programm
BP 56.6: Vortrag
Donnerstag, 23. März 2017, 16:30–16:45, SCH A251
Color tuning of visual rhodopsins: a quantitative explanation by electrostatic calculations — •Florimond Collette, Frank Müh, and Thomas Renger — Institut für Theoretische Physik, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
Rhodopsins are biological pigment-protein complexes found in photoreceptor cells of the retina. Comparing the results of two quantum chemical/electrostatic calculation methods, that have been applied successfully to reveal the functional states of BLUF photoreceptors  and photosystem II antenna protein CP29 , we have estimated absorption shifts of the retinal chromophore for a series of site-directed mutants. Our results are in excellent agreement with recent experimental studies  and strongly suggest that the spectral sensitivity in animal rhodopsins is dominated by electrostatic tuning.
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