View source for 9bh0


==Ancestral uncoupled aspartate transporter in complex with L-aspartate==
<StructureSection load='9bh0' size='340' side='right'caption='[[9bh0]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9bh0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9BH0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9BH0 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ASP:ASPARTIC+ACID'>ASP</scene></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=9bh0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9bh0 OCA], [https://pdbe.org/9bh0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9bh0 RCSB], [https://www.ebi.ac.uk/pdbsum/9bh0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9bh0 ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
Secondary active membrane transporters harness the energy of ion gradients to concentrate their substrates. Homologous transporters evolved to couple transport to different ions in response to changing environments and needs. The bases of such diversification, and thus principles of ion coupling, are unexplored. Employing phylogenetics and ancestral protein reconstruction, we investigated sodium-coupled transport in prokaryotic glutamate transporters, a mechanism ubiquitous across life domains and critical to neurotransmitter recycling in humans. We found that the evolutionary transition from sodium-dependent to independent substrate binding to the transporter preceded changes in the coupling mechanism. Structural and functional experiments suggest that the transition entailed allosteric mutations, making sodium binding dispensable without affecting ion-binding sites. Allosteric tuning of transporters' energy landscapes might be a widespread route of their functional diversification.

Evolutionary analysis reveals the origin of sodium coupling in glutamate transporters.,Reddy KD, Rasool B, Akher FB, Kutlesic N, Pant S, Boudker O bioRxiv [Preprint]. 2024 Apr 25:2023.12.03.569786. doi: , 10.1101/2023.12.03.569786. PMID:38106174<ref>PMID:38106174</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
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== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Boudker O]]
[[Category: Reddy KD]]