1P246 Low temperature FTIR spectroscopy of squid rhodopsin
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چکیده
منابع مشابه
Low temperature FTIR spectroscopy and hydrogen bonding in cytosine polycrystals.
The FTIR spectra of both the pure NH and isotopically substituted ND (<10% and >90% D) polycrystalline cytosine were recorded in the range 400-4000 cm(-1) as a function of temperature (10-300 K). For the first time, uncoupled NH(D) stretching mode bands of amine and imine groups were observed in the spectra of isotopically diluted cytosine at low temperatures. These bands correspond to the thre...
متن کاملThe Rhodopsin System of the Squid
Squid rhodopsin (lambda(max) 493 mmicro)-like vertebrate rhodopsins-contains a retinene chromophore linked to a protein, opsin. Light transforms rhodopsin to lumi- and metarhodopsin. However, whereas vertebrate metarhodopsin at physiological temperatures decomposes into retinene and opsin, squid metarhodopsin is stable. Light also converts squid metarhodopsin to rhodopsin. Rhodopsin is therefor...
متن کاملHigh Resolution Ftir Spectroscopy
In FT-ICLAS, the aim is to improve the absorption detection sensitivity. The experiment combines IntraCavity Laser Absorption Spectroscopy (ICLAS) with FTIR spectroscopy. ICLAS is a well known instrumental technique in which a sample is inserted in a cell placed inside a broadband, multimode laser cavity. The laser is operating in pulsed mode and intracavity absorption rises as the laser wave b...
متن کاملCrystallographic Study of the LUMI Intermediate of Squid Rhodopsin
Upon absorption of light, the retinal chromophore in rhodopsin isomerizes from the 11-cis to the trans configuration, initiating a photoreaction cycle. The primary photoreaction state, bathorhodopsin (BATHO), relaxes thermally through lumirhodopsin (LUMI) into a photoactive state, metarhodopsin (META), which stimulates the conjugated G-protein. Previous crystallographic studies of squid and bov...
متن کاملCrystallographic analysis of the primary photochemical reaction of squid rhodopsin.
Visual signal transduction is initiated by the photoisomerization of 11-cis retinal upon rhodopsin ligation. Unlike vertebrate rhodopsin, which interacts with Gt-type G-protein to stimulate the cyclic GMP signaling pathway, invertebrate rhodopsin interacts with Gq-type G-protein to stimulate a signaling pathway that is based on inositol 1,4,5-triphosphate. Since the inositol 1,4,5-triphosphate ...
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ژورنال
عنوان ژورنال: Seibutsu Butsuri
سال: 2004
ISSN: 0582-4052,1347-4219
DOI: 10.2142/biophys.44.s91_2