6hk0: Difference between revisions
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==X-ray structure of a pentameric ligand gated ion channel from Erwinia chrysanthemi (ELIC) F16'S pore mutant (F247S) with alternate M4 conformation.== | |||
<StructureSection load='6hk0' size='340' side='right'caption='[[6hk0]], [[Resolution|resolution]] 3.45Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6hk0]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/"erwinia_carotovora_var._chrysanthemi"_(burkholder_et_al._1953)_dye_1969 "erwinia carotovora var. chrysanthemi" (burkholder et al. 1953) dye 1969]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6HK0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6HK0 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene></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=6hk0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6hk0 OCA], [http://pdbe.org/6hk0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6hk0 RCSB], [http://www.ebi.ac.uk/pdbsum/6hk0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6hk0 ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Phospholipids are key components of cellular membranes and are emerging as important functional regulators of different membrane proteins, including pentameric ligand-gated ion channels (pLGICs). Here, we take advantage of the prokaryote channel ELIC (Erwinia ligand-gated ion channel) as a model to understand the determinants of phospholipid interactions in this family of receptors. A high-resolution structure of ELIC in a lipid-bound state reveals a phospholipid site at the lower half of pore-forming transmembrane helices M1 and M4 and at a nearby site for neurosteroids, cholesterol or general anesthetics. This site is shaped by an M4-helix kink and a Trp-Arg-Pro triad that is highly conserved in eukaryote GABAA/C and glycine receptors. A combined approach reveals that M4 is intrinsically flexible and that M4 deletions or disruptions of the lipid-binding site accelerate desensitization in ELIC, suggesting that lipid interactions shape the agonist response. Our data offer a structural context for understanding lipid modulation in pLGICs. | |||
A lipid site shapes the agonist response of a pentameric ligand-gated ion channel.,Henault CM, Govaerts C, Spurny R, Brams M, Estrada-Mondragon A, Lynch J, Bertrand D, Pardon E, Evans GL, Woods K, Elberson BW, Cuello LG, Brannigan G, Nury H, Steyaert J, Baenziger JE, Ulens C Nat Chem Biol. 2019 Oct 7. pii: 10.1038/s41589-019-0369-4. doi:, 10.1038/s41589-019-0369-4. PMID:31591563<ref>PMID:31591563</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 6hk0" style="background-color:#fffaf0;"></div> | ||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Evans, G L]] | |||
[[Category: Govaerts, C]] | [[Category: Govaerts, C]] | ||
[[Category: Nury, H]] | [[Category: Nury, H]] | ||
[[Category: Pardon, E]] | [[Category: Pardon, E]] | ||
[[Category: Spurny, R]] | [[Category: Spurny, R]] | ||
[[Category: Steyaert, J]] | |||
[[Category: Ulens, C]] | |||
[[Category: Cya-loop receptor]] | |||
[[Category: Ion channel]] | |||
[[Category: Membrane protein]] | |||
[[Category: Pentameric ligand-gated ion channel]] | |||
