Carotenoid response to retinal excitation and photoisomerization dynamics in xanthorhodopsin

0367254 - BC 2012 RIV NL eng J - Článek v odborném periodiku
Šlouf, V. - Balashov, S.P. - Lanyi, J.K. - Pullerits, T. - Polívka, Tomáš … celkem 6 autorů
Carotenoid response to retinal excitation and photoisomerization dynamics in xanthorhodopsin.
Chemical Physics Letters. Roč. 516, 1-3 (2011), s. 96-101. ISSN 0009-2614. E-ISSN 1873-4448
Výzkumný záměr: CEZ:AV0Z50510513
Klíčová slova: carotenoid * retinal * excited-state dynamics * xanthorhodopsin
Kód oboru RIV: BO - Biofyzika
Impakt faktor: 2.337, rok: 2011

Paper presents a comparative study of xanthorhodopsin, a proton pump with the carotenoid salinixanthin serving as an antenna, and the closely related bacteriorhodopsin. Upon excitation of retinal, xanthorhodopsin exhibits a wavy transient absorption pattern in the region between 470 and 540 nm. This signal is interpreted as due to electrochromic effect of the transient electric field of excited retinal on salinixanthin. The spectral shift decreases during the retinal dynamics through the ultrafast part of the photocycle. Differences in dynamics of bacteriorhodopsin and xanthorhodopsin are discussed.
Trvalý link: http://hdl.handle.net/11104/0006675