2exy: Difference between revisions

From Proteopedia
Jump to navigationJump to search
← Older edit
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,328,572 edits
No edit summary
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,328,572 edits
No edit summary
 
(13 intermediate revisions by the same user not shown)
Line 1: Line 1:
[[Image:2exy.jpg|left|200px]]
<!--
The line below this paragraph, containing "STRUCTURE_2exy", creates the "Structure Box" on the page.
You may change the PDB parameter (which sets the PDB file loaded into the applet)
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
or leave the SCENE parameter empty for the default display.
-->
{{STRUCTURE_2exy|  PDB=2exy  |  SCENE=  }}
'''Crystal structure of the E148Q Mutant of EcClC, Fab complexed in absence of bound ions'''


==Crystal structure of the E148Q Mutant of EcClC, Fab complexed in absence of bound ions==
<StructureSection load='2exy' size='340' side='right'caption='[[2exy]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2exy]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2EXY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2EXY FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.1&#8491;</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=2exy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2exy OCA], [https://pdbe.org/2exy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2exy RCSB], [https://www.ebi.ac.uk/pdbsum/2exy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2exy ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CLCA_ECOLI CLCA_ECOLI] Proton-coupled chloride transporter. Functions as antiport system and exchanges two chloride ions for 1 proton. Probably acts as an electrical shunt for an outwardly-directed proton pump that is linked to amino acid decarboxylation, as part of the extreme acid resistance (XAR) response.<ref>PMID:12384697</ref> <ref>PMID:14985752</ref> <ref>PMID:16341087</ref> <ref>PMID:16905147</ref> <ref>PMID:18678918</ref>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ex/2exy_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=2exy ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The ClC channels are members of a large protein family of chloride (Cl-) channels and secondary active Cl- transporters. Despite their diverse functions, the transmembrane architecture within the family is conserved. Here we present a crystallographic study on the ion-binding properties of the ClC selectivity filter in the close homolog from Escherichia coli (EcClC). The ClC selectivity filter contains three ion-binding sites that bridge the extra- and intracellular solutions. The sites bind Cl- ions with mM affinity. Despite their close proximity within the filter, the three sites can be occupied simultaneously. The ion-binding properties are found conserved from the bacterial transporter EcClC to the human Cl- channel ClC-1, suggesting a close functional link between ion permeation in the channels and active transport in the transporters. In resemblance to K+ channels, ions permeate the ClC channel in a single file, with mutual repulsion between the ions fostering rapid conduction.


==Overview==
Ion-binding properties of the ClC chloride selectivity filter.,Lobet S, Dutzler R EMBO J. 2006 Jan 11;25(1):24-33. Epub 2005 Dec 8. PMID:16341087<ref>PMID:16341087</ref>
The ClC channels are members of a large protein family of chloride (Cl-) channels and secondary active Cl- transporters. Despite their diverse functions, the transmembrane architecture within the family is conserved. Here we present a crystallographic study on the ion-binding properties of the ClC selectivity filter in the close homolog from Escherichia coli (EcClC). The ClC selectivity filter contains three ion-binding sites that bridge the extra- and intracellular solutions. The sites bind Cl- ions with mM affinity. Despite their close proximity within the filter, the three sites can be occupied simultaneously. The ion-binding properties are found conserved from the bacterial transporter EcClC to the human Cl- channel ClC-1, suggesting a close functional link between ion permeation in the channels and active transport in the transporters. In resemblance to K+ channels, ions permeate the ClC channel in a single file, with mutual repulsion between the ions fostering rapid conduction.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
2EXY is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2EXY OCA].
</div>
<div class="pdbe-citations 2exy" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
Ion-binding properties of the ClC chloride selectivity filter., Lobet S, Dutzler R, EMBO J. 2006 Jan 11;25(1):24-33. Epub 2005 Dec 8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16341087 16341087]
*[[Monoclonal Antibodies 3D structures|Monoclonal Antibodies 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
[[Category: Single protein]]
[[Category: Dutzler R]]
[[Category: Dutzler, R.]]
[[Category: Lobet S]]
[[Category: Lobet, S.]]
[[Category: Clc family of channels and transporter]]
[[Category: H+/cl- antiporter]]
[[Category: Membrane protein/fab complex]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 03:14:33 2008''
Retrieved from "https://proteopedia.org/2exy"