4f8h

From Proteopedia

(Difference between revisions)

Revision as of 04:41, 7 October 2022

X-ray Structure of the Anesthetic Ketamine Bound to the GLIC Pentameric Ligand-gated Ion Channel

Structural highlights

4f8h 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

Pentameric ligand-gated ion channels (pLGICs) are targets of general anesthetics, but a structural understanding of anesthetic action on pLGICs remains elusive. GLIC, a prokaryotic pLGIC, can be inhibited by anesthetics, including ketamine. The ketamine concentration leading to half-maximal inhibition of GLIC (58 muM) is comparable to that on neuronal nicotinic acetylcholine receptors. A 2.99 A resolution X-ray structure of GLIC bound with ketamine revealed ketamine binding to an intersubunit cavity that partially overlaps with the homologous antagonist-binding site in pLGICs. The functional relevance of the identified ketamine site was highlighted by profound changes in GLIC activation upon cysteine substitution of the cavity-lining residue N152. The relevance is also evidenced by changes in ketamine inhibition upon the subsequent chemical labeling of N152C. The results provide structural insight into the molecular recognition of ketamine and are valuable for understanding the actions of anesthetics and other allosteric modulators on pLGICs.

Structure of the Pentameric Ligand-Gated Ion Channel GLIC Bound with Anesthetic Ketamine.,Pan J, Chen Q, Willenbring D, Mowrey D, Kong XP, Cohen A, Divito CB, Xu Y, Tang P Structure. 2012 Sep 5;20(9):1463-9. PMID:22958642^[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
↑ Pan J, Chen Q, Willenbring D, Mowrey D, Kong XP, Cohen A, Divito CB, Xu Y, Tang P. Structure of the Pentameric Ligand-Gated Ion Channel GLIC Bound with Anesthetic Ketamine. Structure. 2012 Sep 5;20(9):1463-9. PMID:22958642 doi:http://dx.doi.org/10.1016/j.str.2012.08.009

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/4f8h"

@@ Line 1: / Line 1: @@
 ==X-ray Structure of the Anesthetic Ketamine Bound to the GLIC Pentameric Ligand-gated Ion Channel==
-<StructureSection load='4f8h' size='340' side='right' caption='[[4f8h]], [[Resolution|resolution]] 2.99&Aring;' scene=''>
+<StructureSection load='4f8h' size='340' side='right'caption='[[4f8h]], [[Resolution|resolution]] 2.99&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4f8h]] 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=4F8H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4F8H FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4f8h]] 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=4F8H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4F8H FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=LMD:TETRADECYL+4-O-ALPHA-D-GLUCOPYRANOSYL-BETA-D-GLUCOPYRANOSIDE'>LMD</scene>, <scene name='pdbligand=PC1:1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE'>PC1</scene>, <scene name='pdbligand=RKE:(R)-KETAMINE'>RKE</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LMD:TETRADECYL+4-O-ALPHA-D-GLUCOPYRANOSYL-BETA-D-GLUCOPYRANOSIDE'>LMD</scene>, <scene name='pdbligand=PC1:1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE'>PC1</scene>, <scene name='pdbligand=RKE:(R)-KETAMINE'>RKE</scene></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'>[https://proteopedia.org/fgij/fg.htm?mol=4f8h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4f8h OCA], [https://pdbe.org/4f8h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4f8h RCSB], [https://www.ebi.ac.uk/pdbsum/4f8h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4f8h 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=4f8h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4f8h OCA], [http://pdbe.org/4f8h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4f8h RCSB], [http://www.ebi.ac.uk/pdbsum/4f8h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4f8h 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 21: / 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: Chen, Q]]
+[[Category: Large Structures]]
-[[Category: Cohen, A]]
+[[Category: Chen Q]]
-[[Category: Kong, X P]]
+[[Category: Cohen A]]
-[[Category: Pan, J J]]
+[[Category: Kong XP]]
-[[Category: Tang, P]]
+[[Category: Pan JJ]]
-[[Category: Willenbring, D]]
+[[Category: Tang P]]
-[[Category: Xu, Y]]
+[[Category: Willenbring D]]
-[[Category: Anesthetic]]
+[[Category: Xu Y]]
-[[Category: Ion channel]]
-[[Category: Ketamine]]
-[[Category: Pentameric ligand-gated ion channel]]
-[[Category: Transport protein]]

4f8h

From Proteopedia

Revision as of 04:41, 7 October 2022

X-ray Structure of the Anesthetic Ketamine Bound to the GLIC Pentameric Ligand-gated Ion Channel

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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