3tls: Difference between revisions

From Proteopedia
Jump to navigation Jump to search
← Older edit
No edit summary
No edit summary
 
(2 intermediate revisions by the same user not shown)
Line 1: Line 1:
==The GLIC pentameric Ligand-Gated Ion Channel E19'P mutant in a locally-closed conformation (LC2 subtype)==
==The GLIC pentameric Ligand-Gated Ion Channel E19'P mutant in a locally-closed conformation (LC2 subtype)==
<StructureSection load='3tls' size='340' side='right' caption='[[3tls]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
<StructureSection load='3tls' size='340' side='right'caption='[[3tls]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3tls]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Gloeobacter_violaceus Gloeobacter violaceus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TLS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3TLS FirstGlance]. <br>
<table><tr><td colspan='2'>[[3tls]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Gloeobacter_violaceus Gloeobacter violaceus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TLS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3TLS FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.2&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3tlt|3tlt]], [[3tlu|3tlu]], [[3tlv|3tlv]], [[3tlw|3tlw]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">glr4197 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=33072 Gloeobacter violaceus])</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=3tls FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tls OCA], [https://pdbe.org/3tls PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3tls RCSB], [https://www.ebi.ac.uk/pdbsum/3tls PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3tls ProSAT]</span></td></tr>
<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=3tls FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tls OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3tls RCSB], [http://www.ebi.ac.uk/pdbsum/3tls PDBsum]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/Q7NDN8_GLOVI Q7NDN8_GLOVI]] Cationic channel with similar permeabilities for Na(+) and K(+), that is activated by an increase of the proton concentration on the extracellular side. Displays no permeability for chloride ions. Shows slow kinetics of activation, no desensitization and a single channel conductance of 8 pS. Might contribute to adaptation to external pH change.<ref>PMID:17167423</ref> 
[https://www.uniprot.org/uniprot/GLIC_GLOVI GLIC_GLOVI] Cationic channel with similar permeabilities for Na(+) and K(+), that is activated by an increase of the proton concentration on the extracellular side. Displays no permeability for chloride ions. Shows slow kinetics of activation, no desensitization and a single channel conductance of 8 pS. Might contribute to adaptation to external pH change.<ref>PMID:17167423</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Pentameric ligand-gated ion channels mediate signal transduction through conformational transitions between closed-pore and open-pore states. To stabilize a closed conformation of GLIC, a bacterial proton-gated homolog from Gloeobacter violaceus whose open structure is known, we separately generated either four cross-links or two single mutations. We found all six mutants to be in the same 'locally closed' conformation using X-ray crystallography, sharing most of the features of the open form but showing a locally closed pore as a result of a concerted bending of all of its M2 helices. The mutants adopt several variant conformations of the M2-M3 loop, and in all cases an interacting lipid that is observed in the open form disappears. A single cross-linked mutant is functional, according to electrophysiology, and the locally closed structure of this mutant indicates that it has an increased flexibility. Further cross-linking, accessibility and molecular dynamics data suggest that the locally closed form is a functionally relevant conformation that occurs during allosteric gating transitions.
 
A locally closed conformation of a bacterial pentameric proton-gated ion channel.,Prevost MS, Sauguet L, Nury H, Van Renterghem C, Huon C, Poitevin F, Baaden M, Delarue M, Corringer PJ Nat Struct Mol Biol. 2012 May 13. doi: 10.1038/nsmb.2307. PMID:22580559<ref>PMID:22580559</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>


==See Also==
==See Also==
*[[Ion channels|Ion channels]]
*[[Ion channels 3D structures|Ion channels 3D structures]]
*[[Phosphoinositide 3-Kinases|Phosphoinositide 3-Kinases]]
*[[Phosphoinositide 3-kinase 3D structures|Phosphoinositide 3-kinase 3D structures]]
== References ==
== References ==
<references/>
<references/>
Line 27: Line 19:
</StructureSection>
</StructureSection>
[[Category: Gloeobacter violaceus]]
[[Category: Gloeobacter violaceus]]
[[Category: Corringer, P J]]
[[Category: Large Structures]]
[[Category: Delarue, M]]
[[Category: Corringer PJ]]
[[Category: Nury, H]]
[[Category: Delarue M]]
[[Category: Sauguet, L]]
[[Category: Nury H]]
[[Category: Cys-loop receptor family]]
[[Category: Sauguet L]]
[[Category: Membrane protein]]
[[Category: Transport protein]]

Latest revision as of 13:09, 1 March 2024

The GLIC pentameric Ligand-Gated Ion Channel E19'P mutant in a locally-closed conformation (LC2 subtype)The GLIC pentameric Ligand-Gated Ion Channel E19'P mutant in a locally-closed conformation (LC2 subtype)

Structural highlights

3tls is a 5 chain structure with sequence from Gloeobacter violaceus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 3.2Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

GLIC_GLOVI Cationic channel with similar permeabilities for Na(+) and K(+), that is activated by an increase of the proton concentration on the extracellular side. Displays no permeability for chloride ions. Shows slow kinetics of activation, no desensitization and a single channel conductance of 8 pS. Might contribute to adaptation to external pH change.[1]

See Also

References

  1. ↑ Bocquet N, Prado de Carvalho L, Cartaud J, Neyton J, Le Poupon C, Taly A, Grutter T, Changeux JP, Corringer PJ. A prokaryotic proton-gated ion channel from the nicotinic acetylcholine receptor family. Nature. 2007 Jan 4;445(7123):116-9. Epub 2006 Dec 10. PMID:17167423 doi:10.1038/nature05371

3tls, resolution 3.20Å

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

OCA
Retrieved from "https://proteopedia.openfox.io/wiki/index.php?title=3tls&oldid=4071913"