Structural analysis of photo-intermediates of squid rhodopsin
| Project/Area Number |
22770146
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Biophysics
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | ロドプシン / X線結晶構造解析 / 光生物 |
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| Research Abstract |
Photochemical properties of invertebrate rhodopsin are different largely from vertebrate rhodopsin. Recent crystallographic studies of squid and bovine rhodopsins suggest profound differences in the structure of these photoreceptors. Here, we perform X-ray crystallographic studies of squid bathorhodopsin and an artificial 9-cis isomer isorhodopsin. Analyses of diffraction data of frozen crystals that were illuminated at these wavelengths provided the structural information of each isomeric state. The result showed that the formation of bathorhodopsin is accompanied by a large movement of the central moiety of the retinal polyene chain towards the cytoplasmic side with small movements of the s-ionone ring and the Schiff base ; i. e., the retinal takes on a right-handed screwed all-trans configuration. Conversely, the retinal in isorhodopsin takes on a planar 9-cis configuration ; i. e., as compared to the 11-cis retinal in the unphotolysed state, a limited configurational change is observed around the C9=C10 bond.
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Report
(3 results)
Research Products
(36 results)
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[Presentation] タコロドプシンの結晶化2012
Author(s)
水野克秀,張進,中村洋子,村上緑,神山勉
Organizer
平成23年度日本生物物理学会中部支部講演会
Place of Presentation
名古屋
Year and Date
2012-03-19
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