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BP: Fachverband Biologische Physik

BP 52: Protein structure and dynamics II

BP 52.2: Vortrag

Freitag, 20. März 2015, 10:00–10:15, H 1028

Electrochromic shift calculations explain spectral tuning in light-sensitive proteins — •Florimond Collette, Marcel Schmidt am Busch, and Thomas Renger — Institut für Theoretische Physik, Johannes Kepler Universität Linz, Altenberger Strasse 69, 4040 Linz, Austria

Rhodopsins are biological pigment-proteins found in photoreceptor cells of the retina. Within the framework of a quantum chemical/electrostatic calculation scheme that has recently been successfully applied to reveal the functional states of BLUF photoreceptors [1], we estimated absorption shifts of the retinal cofactor for a series of site-directed mutants. Our calculations accurately reproduce a series of spectroscopic data and eventually the variations of the maximal absorbance in the red- and green-sensitive visual pigments.

[1] F. Collette et al., J. Phys. Chem. B 118, 11109 (2014).