3c9l

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==Structure of ground-state bovine rhodospin in a hexagonal crystal form==
==Structure of ground-state bovine rhodospin in a hexagonal crystal form==
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<StructureSection load='3c9l' size='340' side='right' caption='[[3c9l]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
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<StructureSection load='3c9l' size='340' side='right'caption='[[3c9l]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3c9l]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C9L OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3C9L FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3c9l]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C9L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3C9L FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=C8E:(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE'>C8E</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PEF:DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE'>PEF</scene>, <scene name='pdbligand=PLM:PALMITIC+ACID'>PLM</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.646&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1gzm|1gzm]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=C8E:(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE'>C8E</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PEF:DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE'>PEF</scene>, <scene name='pdbligand=PLM:PALMITIC+ACID'>PLM</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3c9l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c9l OCA], [http://pdbe.org/3c9l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3c9l RCSB], [http://www.ebi.ac.uk/pdbsum/3c9l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3c9l ProSAT]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3c9l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c9l OCA], [https://pdbe.org/3c9l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3c9l RCSB], [https://www.ebi.ac.uk/pdbsum/3c9l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3c9l ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/OPSD_BOVIN OPSD_BOVIN]] Photoreceptor required for image-forming vision at low light intensity. Required for photoreceptor cell viability after birth. Light-induced isomerization of 11-cis to all-trans retinal triggers a conformational change leading to G-protein activation and release of all-trans retinal (By similarity).<ref>PMID:16908857</ref> <ref>PMID:17060607</ref>
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[https://www.uniprot.org/uniprot/OPSD_BOVIN OPSD_BOVIN] Photoreceptor required for image-forming vision at low light intensity. Required for photoreceptor cell viability after birth. Light-induced isomerization of 11-cis to all-trans retinal triggers a conformational change leading to G-protein activation and release of all-trans retinal (By similarity).<ref>PMID:16908857</ref> <ref>PMID:17060607</ref>
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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We have determined the structure of bovine rhodopsin at 2.65 A resolution using untwinned native crystals in the space group P3(1), by molecular replacement from the 2.8 A model (1F88) solved in space group P4(1). The new structure reveals mechanistically important details unresolved previously, which are considered in the membrane context by docking the structure into a cryo-electron microscopy map of 2D crystals. Kinks in the transmembrane helices facilitate inter-helical polar interactions. Ordered water molecules extend the hydrogen bonding networks, linking Trp265 in the retinal binding pocket to the NPxxY motif near the cytoplasmic boundary, and the Glu113 counterion for the protonated Schiff base to the extracellular surface. Glu113 forms a complex with a water molecule hydrogen bonded between its main chain and side-chain oxygen atoms. This can be expected to stabilise the salt-bridge with the protonated Schiff base linking the 11-cis-retinal to Lys296. The cytoplasmic ends of helices H5 and H6 have been extended by one turn. The G-protein interaction sites mapped to the cytoplasmic ends of H5 and H6 and a spiral extension of H5 are elevated above the bilayer. There is a surface cavity next to the conserved Glu134-Arg135 ion pair. The cytoplasmic loops have the highest temperature factors in the structure, indicative of their flexibility when not interacting with G protein or regulatory proteins. An ordered detergent molecule is seen wrapped around the kink in H6, stabilising the structure around the potential hinge in H6. These findings provide further explanation for the stability of the dark state structure. They support a mechanism for the activation, initiated by photo-isomerisation of the chromophore to its all-trans form, that involves pivoting movements of kinked helices, which, while maintaining hydrophobic contacts in the membrane interior, can be coupled to amplified translation of the helix ends near the membrane surfaces.
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The space-group symmetry of two crystal forms of rhodopsin (PDB codes 1gzm and 2j4y; space group P3(1)) can be re-interpreted as hexagonal (space group P6(4)). Two molecules of the G protein-coupled receptor are present in the asymmetric unit in the trigonal models. However, the noncrystallographic twofold axes parallel to the c axis can be treated as crystallographic symmetry operations in the hexagonal space group. This halves the asymmetric unit and makes all of the protein molecules equivalent in these structures. Corrections for merohedral twinning were also applied in the refinement in the higher symmetry space group for one of the structures (2j4y).
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Structure of bovine rhodopsin in a trigonal crystal form.,Li J, Edwards PC, Burghammer M, Villa C, Schertler GF J Mol Biol. 2004 Nov 5;343(5):1409-38. PMID:15491621<ref>PMID:15491621</ref>
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Alternative models for two crystal structures of bovine rhodopsin.,Stenkamp RE Acta Crystallogr D Biol Crystallogr. 2008 Aug;D64(Pt 8):902-4. Epub 2008, Jul 17. PMID:18645239<ref>PMID:18645239</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
==See Also==
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*[[Rhodopsin|Rhodopsin]]
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*[[Rhodopsin 3D structures|Rhodopsin 3D structures]]
== References ==
== References ==
<references/>
<references/>
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</StructureSection>
</StructureSection>
[[Category: Bos taurus]]
[[Category: Bos taurus]]
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[[Category: Stenkamp, R E]]
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[[Category: Large Structures]]
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[[Category: Alternate space group]]
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[[Category: Stenkamp RE]]
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[[Category: Chromophore]]
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[[Category: G-protein coupled receptor]]
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[[Category: Glycoprotein]]
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[[Category: Integral membrane protein]]
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[[Category: Lipoprotein]]
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[[Category: Palmitate]]
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[[Category: Phosphoprotein]]
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[[Category: Phosphorylation]]
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[[Category: Photoreceptor]]
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[[Category: Photoreceptor protein]]
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[[Category: Retinal protein]]
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[[Category: Sensory transduction]]
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[[Category: Signaling protein]]
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[[Category: Transducer]]
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[[Category: Transmembrane]]
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[[Category: Vision]]
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[[Category: Visual pigment]]
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Current revision

Structure of ground-state bovine rhodospin in a hexagonal crystal form

PDB ID 3c9l

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