1gue: Difference between revisions

Revision as of 06:05, 1 July 2008

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File:1gue.png

Template:STRUCTURE 1gue

SENSORY RHODOPSIN IISENSORY RHODOPSIN II

Template:ABSTRACT PUBMED 11937052

About this StructureAbout this Structure

1GUE is a Single protein structure of sequence from Natronomonas pharaonis. Full crystallographic information is available from OCA.

ReferenceReference

Early structural rearrangements in the photocycle of an integral membrane sensory receptor., Edman K, Royant A, Nollert P, Maxwell CA, Pebay-Peyroula E, Navarro J, Neutze R, Landau EM, Structure. 2002 Apr;10(4):473-82. PMID:11937052

Page seeded by OCA on Tue Jul 1 06:05:45 2008

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OCA

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-'''SENSORY RHODOPSIN II'''
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-==Overview==
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-Sensory rhodopsins are the primary receptors of vision in animals and phototaxis in microorganisms. Light triggers the rapid isomerization of a buried retinal chromophore, which the protein both accommodates and amplifies into the larger structural rearrangements required for signaling. We trapped an early intermediate of the photocycle of sensory rhodopsin II from Natronobacterium pharaonis (pSRII) in 3D crystals and determined its X-ray structure to 2.3 A resolution. The observed structural rearrangements were localized near the retinal chromophore, with a key water molecule becoming disordered and the retinal's beta-ionone ring undergoing a prominent movement. Comparison with the early structural rearrangements of bacteriorhodopsin illustrates how modifications in the retinal binding pocket of pSRII allow subtle differences in the early relaxation of photoisomerized retinal.
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+{{ABSTRACT_PUBMED_11937052}}
 ==About this Structure==
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 [[Category: Photoreceptor]]
 [[Category: Phototaxis]]
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