1at9: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1at9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Halobacterium_salinarum Halobacterium salinarum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AT9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1AT9 FirstGlance]. <br>
<table><tr><td colspan='2'>[[1at9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Halobacterium_salinarum Halobacterium salinarum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AT9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1AT9 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=RET:RETINAL'>RET</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron crystallography, [[Resolution|Resolution]] 3&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1at9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1at9 OCA], [https://pdbe.org/1at9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1at9 RCSB], [https://www.ebi.ac.uk/pdbsum/1at9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1at9 ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1at9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1at9 OCA], [https://pdbe.org/1at9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1at9 RCSB], [https://www.ebi.ac.uk/pdbsum/1at9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1at9 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/BACR_HALSA BACR_HALSA]] Light-driven proton pump.  
[https://www.uniprot.org/uniprot/BACR_HALSA BACR_HALSA] Light-driven proton pump.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1at9 ConSurf].
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1at9 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bacteriorhodopsin is a transmembrane protein that uses light energy, absorbed by its chromophore retinal, to pump protons from the cytoplasm of bacteria such as Halobacterium salinarium into the extracellular space. It is made up of seven alpha-helices, and in the bacterium forms natural, two-dimensional crystals called purple membranes. We have analysed these crystals by electron cryo-microscopy to obtain images of bacteriorhodopsin at 3.0 A resolution. The structure covers nearly all 248 amino acids, including loops outside the membrane, and reveals the distribution of charged residues on both sides of the membrane surface. In addition, analysis of the electron-potential map produced by this method allows the determination of the charge status of these residues. On the extracellular side, four glutamate residues surround the entrance to the proton channel, whereas on the cytoplasmic side, four aspartic acids occur in a plane at the boundary of the hydrophobic-hydrophilic interface. The negative charges produced by these aspartate residues is encircled by areas of positive charge that may facilitate accumulation and lateral movement of protons on this surface.
Surface of bacteriorhodopsin revealed by high-resolution electron crystallography.,Kimura Y, Vassylyev DG, Miyazawa A, Kidera A, Matsushima M, Mitsuoka K, Murata K, Hirai T, Fujiyoshi Y Nature. 1997 Sep 11;389(6647):206-11. PMID:9296502<ref>PMID:9296502</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1at9" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Bacteriorhodopsin 3D structures|Bacteriorhodopsin 3D structures]]
*[[Bacteriorhodopsin 3D structures|Bacteriorhodopsin 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Halobacterium salinarum]]
[[Category: Halobacterium salinarum]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Fujiyoshi, Y]]
[[Category: Fujiyoshi Y]]
[[Category: Hirai, T]]
[[Category: Hirai T]]
[[Category: Kidera, A]]
[[Category: Kidera A]]
[[Category: Kimura, Y]]
[[Category: Kimura Y]]
[[Category: Matsushima, M]]
[[Category: Matsushima M]]
[[Category: Mitsuoka, K]]
[[Category: Mitsuoka K]]
[[Category: Miyazawa, A]]
[[Category: Miyazawa A]]
[[Category: Murata, K]]
[[Category: Murata K]]
[[Category: Vassylyev, D G]]
[[Category: Vassylyev DG]]
[[Category: Membrane protein]]
[[Category: Photoreceptor]]
[[Category: Proton pump]]
[[Category: Retinal protein]]
[[Category: Two-dimensional crystal]]

Revision as of 15:28, 13 March 2024

STRUCTURE OF BACTERIORHODOPSIN AT 3.0 ANGSTROM DETERMINED BY ELECTRON CRYSTALLOGRAPHY

1at9, resolution 3.00Å

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