DYNAMIC ASPECTS OF METARHODOPSIN FORMATION IN PHOTOCHEMICAL CYCLE OF EXTRACTED OCTOPUS RHODOPSIN
نویسندگان
چکیده
منابع مشابه
Hydrogen bonding changes of internal water molecules in rhodopsin during metarhodopsin I and metarhodopsin II formation.
Rhodopsin is a 7-helix, integral membrane protein found in the rod outer segments, which serves as the light receptor in vision. Light absorption by the retinylidene chromophore of rhodopsin triggers an 11-cis-->all-trans isomerization, followed by a series of protein conformational changes, which culminate in the binding and activation of the G-protein transducin by the metarhodopsin II (Meta ...
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Vertebrate rhodopsin consists of the apoprotein opsin and the chromophore 11-cis-retinal covalently linked via a protonated Schiff base. Upon photoisomerization of the chromophore to all-trans-retinal, the retinylidene linkage hydrolyzes, and all-trans-retinal dissociates from opsin. The pigment is eventually restored by recombining with enzymatically produced 11-cis-retinal. All-trans-retinal ...
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ژورنال
عنوان ژورنال: The Japanese Journal of Physiology
سال: 1974
ISSN: 1881-1396,0021-521X
DOI: 10.2170/jjphysiol.24.93