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| {{STRUCTURE_1xio| PDB=1xio | SCENE= }} | | {{STRUCTURE_1xio| PDB=1xio | SCENE= }} |
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| '''Anabaena sensory rhodopsin'''
| | ===Anabaena sensory rhodopsin=== |
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| ==Overview==
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| Microbial sensory rhodopsins are a family of membrane-embedded photoreceptors in prokaryotic and eukaryotic organisms. Structures of archaeal rhodopsins, which function as light-driven ion pumps or photosensors, have been reported. We present the structure of a eubacterial rhodopsin, which differs from those of previously characterized archaeal rhodopsins in its chromophore and cytoplasmic-side portions. Anabaena sensory rhodopsin exhibits light-induced interconversion between stable 13-cis and all-trans states of the retinylidene protein. The ratio of its cis and trans chromophore forms depends on the wavelength of illumination, thus providing a mechanism for a single protein to signal the color of light, for example, to regulate color-sensitive processes such as chromatic adaptation in photosynthesis. Its cytoplasmic half channel, highly hydrophobic in the archaeal rhodopsins, contains numerous hydrophilic residues networked by water molecules, providing a connection from the photoactive site to the cytoplasmic surface believed to interact with the receptor's soluble 14-kilodalton transducer.
| | The line below this paragraph, {{ABSTRACT_PUBMED_15459346}}, adds the Publication Abstract to the page |
| | (as it appears on PubMed at http://www.pubmed.gov), where 15459346 is the PubMed ID number. |
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| | {{ABSTRACT_PUBMED_15459346}} |
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| ==About this Structure== | | ==About this Structure== |
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| [[Category: Photoreceptor]] | | [[Category: Photoreceptor]] |
| [[Category: Signaling protein]] | | [[Category: Signaling protein]] |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 15:04:54 2008'' | | |
| | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 13:41:19 2008'' |
