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4hfc

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Revision as of 08:13, 3 November 2022

The GLIC pentameric Ligand-Gated Ion Channel F14'A ethanol-sensitive mutant complexed to 2-bromo-ethanol

Structural highlights

4hfc is a 5 chain structure with sequence from Gloeobacter violaceus PCC 7421. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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]

Publication Abstract from PubMed

Ethanol alters nerve signalling by interacting with proteins in the central nervous system, particularly pentameric ligand-gated ion channels. A recent series of mutagenesis experiments on Gloeobacter violaceus ligand-gated ion channel, a prokaryotic member of this family, identified a single-site variant that is potentiated by pharmacologically relevant concentrations of ethanol. Here we determine crystal structures of the ethanol-sensitized variant in the absence and presence of ethanol and related modulators, which bind in a transmembrane cavity between channel subunits and may stabilize the open form of the channel. Structural and mutagenesis studies defined overlapping mechanisms of potentiation by alcohols and anaesthetics via the inter-subunit cavity. Furthermore, homology modelling show this cavity to be conserved in human ethanol-sensitive glycine and GABA(A) receptors, and to involve residues previously shown to influence alcohol and anaesthetic action on these proteins. These results suggest a common structural basis for ethanol potentiation of an important class of targets for neurological actions of ethanol.

Structural basis for potentiation by alcohols and anaesthetics in a ligand-gated ion channel.,Sauguet L, Howard RJ, Malherbe L, Lee US, Corringer PJ, Harris RA, Delarue M Nat Commun. 2013;4:1697. doi: 10.1038/ncomms2682. PMID:23591864^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ 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
↑ Sauguet L, Howard RJ, Malherbe L, Lee US, Corringer PJ, Harris RA, Delarue M. Structural basis for potentiation by alcohols and anaesthetics in a ligand-gated ion channel. Nat Commun. 2013;4:1697. doi: 10.1038/ncomms2682. PMID:23591864 doi:10.1038/ncomms2682

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4hfc"

@@ Line 1: / Line 1: @@
 ==The GLIC pentameric Ligand-Gated Ion Channel F14'A ethanol-sensitive mutant complexed to 2-bromo-ethanol==
-<StructureSection load='4hfc' size='340' side='right' caption='[[4hfc]], [[Resolution|resolution]] 3.05&Aring;' scene=''>
+<StructureSection load='4hfc' size='340' side='right'caption='[[4hfc]], [[Resolution|resolution]] 3.05&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4hfc]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Glovi Glovi]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HFC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4HFC FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4hfc]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Gloeobacter_violaceus_PCC_7421 Gloeobacter violaceus PCC 7421]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HFC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4HFC FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=BRJ:2-BROMOETHANOL'>BRJ</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PLC:DIUNDECYL+PHOSPHATIDYL+CHOLINE'>PLC</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=BRJ:2-BROMOETHANOL'>BRJ</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PLC:DIUNDECYL+PHOSPHATIDYL+CHOLINE'>PLC</scene></td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4hfb|4hfb]]</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=4hfc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hfc OCA], [https://pdbe.org/4hfc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4hfc RCSB], [https://www.ebi.ac.uk/pdbsum/4hfc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4hfc ProSAT]</span></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">glvI, glr4197 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=251221 GLOVI])</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=4hfc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hfc OCA], [http://pdbe.org/4hfc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4hfc RCSB], [http://www.ebi.ac.uk/pdbsum/4hfc PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4hfc ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://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>
+[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 ==
@@ Line 22: / Line 20: @@
 ==See Also==
-*[[Ion channels|Ion channels]]
+*[[Ion channels 3D structures|Ion channels 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Glovi]]
+[[Category: Gloeobacter violaceus PCC 7421]]
-[[Category: Corringer, P J]]
+[[Category: Large Structures]]
-[[Category: Delarue, M]]
+[[Category: Corringer PJ]]
-[[Category: Harris, R A]]
+[[Category: Delarue M]]
-[[Category: Howard, R J]]
+[[Category: Harris RA]]
-[[Category: Lee, U S]]
+[[Category: Howard RJ]]
-[[Category: Malherbe, L]]
+[[Category: Lee US]]
-[[Category: Sauguet, L]]
+[[Category: Malherbe L]]
-[[Category: Ion-channel]]
+[[Category: Sauguet L]]
-[[Category: Membrane protein]]
-[[Category: Pentameric transmembrane channel]]
-[[Category: Transport protein]]

4hfc

From Proteopedia

Revision as of 08:13, 3 November 2022

The GLIC pentameric Ligand-Gated Ion Channel F14'A ethanol-sensitive mutant complexed to 2-bromo-ethanol

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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