1h68
From Proteopedia
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SENSORY RHODOPSIN II
Overview
Sensory rhodopsins (SRs) belong to a subfamily of heptahelical, transmembrane proteins containing a retinal chromophore. These, photoreceptors mediate the cascade of vision in animal eyes and phototaxis, in archaebacteria and unicellular flagellated algae. Signal transduction, by these photoreceptors occurs by means of transducer proteins. The two, archaebacterial sensory rhodopsins SRI and SRII are coupled to the, membrane-bound HtrI and HtrII transducer proteins. Activation of these, proteins initiates phosphorylation cascades that modulate the flagellar, motors, resulting in either attractant (SRI) or repellent (SRII), phototaxis. In addition, transducer-free SRI and SRII were shown to, operate as proton pumps, analogous to bacteriorhodopsin. Here, we present, the x-ray structure of ... [(full description)]
About this Structure
1H68 is a [Single protein] structure of sequence from [Natronomonas pharaonis] with CL, LEU and RET as [ligands]. The following page contains interesting information on the relation of 1H68 with [Bacteriorhodopsin]. Structure known Active Sites: CL and RET. Full crystallographic information is available from [OCA].
Reference
X-ray structure of sensory rhodopsin II at 2.1-A resolution., Royant A, Nollert P, Edman K, Neutze R, Landau EM, Pebay-Peyroula E, Navarro J, Proc Natl Acad Sci U S A. 2001 Aug 28;98(18):10131-6. Epub 2001 Aug 14. PMID:11504917
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