3e8f

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[[Image:3e8f.png|left|200px]]
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==Crystal Structure of the the open NaK channel- K+/Ba2+==
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<StructureSection load='3e8f' size='340' side='right' caption='[[3e8f]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3e8f]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3E8F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3E8F FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BA:BARIUM+ION'>BA</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3e83|3e83]], [[3e86|3e86]], [[3e89|3e89]], [[3e8b|3e8b]], [[3e8g|3e8g]], [[3e8h|3e8h]]</td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3e8f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3e8f OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3e8f RCSB], [http://www.ebi.ac.uk/pdbsum/3e8f PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/e8/3e8f_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Here we present a detailed characterization of ion binding in the NaK pore using the high-resolution structures of NaK in complex with various cations. These structures reveal four ion binding sites with similar chemical environments but vastly different ion preference. The most nonselective of all is site 3, which is formed exclusively by backbone carbonyl oxygen atoms and resides deep within the selectivity filter. Additionally, four water molecules in combination with four backbone carbonyl oxygen atoms are seen to participate in K(+) and Rb(+) ion chelation, at both the external entrance and the vestibule of the NaK filter, confirming the channel's preference for an octahedral ligand configuration for K(+) and Rb(+) binding. In contrast, Na(+) binding in the NaK filter, particularly at site 4, utilizes a pyramidal ligand configuration that requires the participation of a water molecule in the cavity. Therefore, the ability of the NaK filter to bind both Na(+) and K(+) ions seemingly arises from the ions' ability to use the existing environment in unique ways, rather than from any structural rearrangements of the filter itself.
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<!--
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Structural analysis of ion selectivity in the NaK channel.,Alam A, Jiang Y Nat Struct Mol Biol. 2009 Jan;16(1):35-41. Epub 2008 Dec 21. PMID:19098915<ref>PMID:19098915</ref>
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The line below this paragraph, containing "STRUCTURE_3e8f", creates the "Structure Box" on the page.
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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or leave the SCENE parameter empty for the default display.
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-->
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{{STRUCTURE_3e8f| PDB=3e8f | SCENE= }}
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===Crystal Structure of the the open NaK channel- K+/Ba2+===
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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</div>
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== References ==
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<!--
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<references/>
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The line below this paragraph, {{ABSTRACT_PUBMED_19098915}}, adds the Publication Abstract to the page
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__TOC__
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(as it appears on PubMed at http://www.pubmed.gov), where 19098915 is the PubMed ID number.
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</StructureSection>
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-->
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{{ABSTRACT_PUBMED_19098915}}
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==About this Structure==
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[[3e8f]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3E8F OCA].
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==Reference==
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<ref group="xtra">PMID:019098915</ref><references group="xtra"/>
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[[Category: Bacillus cereus]]
[[Category: Bacillus cereus]]
[[Category: Alam, A.]]
[[Category: Alam, A.]]

Revision as of 09:48, 21 May 2014

Crystal Structure of the the open NaK channel- K+/Ba2+

3e8f, resolution 2.00Å

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