6x16: Difference between revisions

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<StructureSection load='6x16' size='340' side='right'caption='[[6x16]], [[Resolution|resolution]] 3.39&Aring;' scene=''>
<StructureSection load='6x16' size='340' side='right'caption='[[6x16]], [[Resolution|resolution]] 3.39&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6x16]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/'pyrococcus_shinkaii' 'pyrococcus shinkaii']. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6X16 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6X16 FirstGlance]. <br>
<table><tr><td colspan='2'>[[6x16]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_horikoshii Pyrococcus horikoshii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6X16 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6X16 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6OU:[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl]+(~{Z})-octadec-9-enoate'>6OU</scene>, <scene name='pdbligand=TB1:(3S)-3-(BENZYLOXY)-L-ASPARTIC+ACID'>TB1</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.39&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=FME:N-FORMYLMETHIONINE'>FME</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6OU:[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl]+(~{Z})-octadec-9-enoate'>6OU</scene>, <scene name='pdbligand=FME:N-FORMYLMETHIONINE'>FME</scene>, <scene name='pdbligand=TB1:(3S)-3-(BENZYLOXY)-L-ASPARTIC+ACID'>TB1</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6x16 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6x16 OCA], [http://pdbe.org/6x16 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6x16 RCSB], [http://www.ebi.ac.uk/pdbsum/6x16 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6x16 ProSAT]</span></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=6x16 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6x16 OCA], [https://pdbe.org/6x16 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6x16 RCSB], [https://www.ebi.ac.uk/pdbsum/6x16 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6x16 ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Function ==
== Publication Abstract from PubMed ==
[https://www.uniprot.org/uniprot/GLT_PYRHO GLT_PYRHO] Sodium-dependent, high-affinity amino acid transporter that mediates aspartate uptake (PubMed:17435767, PubMed:19380583, PubMed:17230192, Ref.11). Has only very low glutamate transport activity (PubMed:19380583, PubMed:17230192). Functions as a symporter that transports one amino acid molecule together with two or three Na(+) ions, resulting in electrogenic transport (PubMed:17435767, PubMed:19380583, Ref.11). Na(+) binding enhances the affinity for aspartate (PubMed:19380583, Ref.11). Mediates Cl(-) flux that is not coupled to amino acid transport; this avoids the accumulation of negative charges due to aspartate and Na(+) symport (PubMed:17435767). In contrast to mammalian homologs, transport does not depend on pH or K(+) ions (PubMed:19380583).<ref>PMID:17230192</ref> <ref>PMID:17435767</ref> <ref>PMID:19380583</ref> [PDB:4P19]
Glutamate transporters are essential players in glutamatergic neurotransmission in the brain, where they maintain extracellular glutamate below cytotoxic levels and allow for rounds of transmission. The structural bases of their function are well established, particularly within a model archaeal homologue, sodium and aspartate symporter GltPh. However, the mechanism of gating on the cytoplasmic side of the membrane remains ambiguous. We report Cryo-EM structures of GltPh reconstituted into nanodiscs, including those structurally constrained in the cytoplasm-facing state and either apo, bound to sodium ions only, substrate, or blockers. The structures show that both substrate translocation and release involve movements of the bulky transport domain through the lipid bilayer. They further reveal a novel mode of inhibitor binding and show how solutes release is coupled to protein conformational changes. Finally, we describe how domain movements are associated with the displacement of bound lipids and significant membrane deformations, highlighting the potential regulatory role of the bilayer.
 
Large domain movements through the lipid bilayer mediate substrate release and inhibition of glutamate transporters.,Wang X, Boudker O Elife. 2020 Nov 6;9. pii: 58417. doi: 10.7554/eLife.58417. PMID:33155546<ref>PMID:33155546</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6x16" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Pyrococcus shinkaii]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Boudker, O]]
[[Category: Pyrococcus horikoshii]]
[[Category: Wang, X]]
[[Category: Boudker O]]
[[Category: Sodium-coupled l-aspartate transporter]]
[[Category: Wang X]]
[[Category: Transport protein]]

Revision as of 14:47, 6 March 2024

Inward-facing state of the glutamate transporter homologue GltPh in complex with TBOA

6x16, resolution 3.39Å

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