PMID: 6398559Jan 1, 1984Paper

Primary intermediates of rhodopsin studied by low temperature spectrophotometry and laser photolysis. Bathorhodopsin, hypsorhodopsin and photorhodopsin

Vision Research
T YoshizawaS Matuoka

Abstract

The primary photochemical processes of rhodopsin studied by low temperature spectrophotometry and picosecond laser spectroscopy in our group was summarized. Low temperature spectroscopic experiments demonstrated that the retinylidene chromophores of hypso- and bathorhodopsins are in a twisted all-trans forms. Excitation of rhodopsin with 532 nm laser pulse (width: 25 psec) yielded a new bathochromic photoproduct "photorhodopsin"; its spectrum was located at longer wavelengths than that of bathorhodopsin. Photorhodopsin decays to bathorhodopsin with time constants of about 200 psec in squid and 40 psec in cattle. Squid and octopus hypsorhodopsins were produced within 25 psec by high energy pulse, but not by low energy pulse. Thus hypsorhodopsin is produced by two photon reactions (sequential two photochemical reactions) and decayed to bathorhodopsin with time constant of 125 psec.

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Citations

Apr 1, 1992·Journal of Bioenergetics and Biomembranes·J W Lewis, D S Kliger
Dec 1, 1989·The Journal of Membrane Biology·M Ottolenghi, M Sheves
Mar 21, 2008·Journal of Molecular Modeling·Robert Send, Dage Sundholm
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Mar 13, 2002·The Journal of Biological Chemistry·Shui-Lin NiuBurton J Litman
Sep 8, 2009·Journal of Chemical Theory and Computation·Robert SendFilip Pawłowski

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