1xfh

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(New page: 200px<br /><applet load="1xfh" size="450" color="white" frame="true" align="right" spinBox="true" caption="1xfh, resolution 3.50&Aring;" /> '''Structure of glutama...)
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[[Image:1xfh.gif|left|200px]]<br /><applet load="1xfh" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1xfh, resolution 3.50&Aring;" />
 
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'''Structure of glutamate transporter homolog from Pyrococcus horikoshii'''<br />
 
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==Overview==
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==Structure of glutamate transporter homolog from Pyrococcus horikoshii==
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Glutamate transporters are integral membrane proteins that catalyse the, concentrative uptake of glutamate from the synapse to intracellular spaces, by harnessing pre-existing ion gradients. In the central nervous system, glutamate transporters are essential for normal development and function, and are implicated in stroke, epilepsy and neurodegenerative diseases., Here we present the crystal structure of a eukaryotic glutamate, transporter homologue from Pyrococcus horikoshii. The transporter is a, bowl-shaped trimer with a solvent-filled extracellular basin extending, halfway across the membrane bilayer. At the bottom of the basin are three, independent binding sites, each cradled by two helical hairpins, reaching, from opposite sides of the membrane. We propose that transport of, glutamate is achieved by movements of the hairpins that allow alternating, access to either side of the membrane.
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<StructureSection load='1xfh' size='340' side='right'caption='[[1xfh]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1xfh]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_horikoshii_OT3 Pyrococcus horikoshii OT3]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XFH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XFH FirstGlance]. <br>
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1XFH is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_horikoshii_ot3 Pyrococcus horikoshii ot3]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1XFH OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.5&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1xfh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xfh OCA], [https://pdbe.org/1xfh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xfh RCSB], [https://www.ebi.ac.uk/pdbsum/1xfh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xfh ProSAT]</span></td></tr>
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==Reference==
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</table>
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Structure of a glutamate transporter homologue from Pyrococcus horikoshii., Yernool D, Boudker O, Jin Y, Gouaux E, Nature. 2004 Oct 14;431(7010):811-8. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15483603 15483603]
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== Function ==
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[[Category: Pyrococcus horikoshii ot3]]
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[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]
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[[Category: Single protein]]
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== Evolutionary Conservation ==
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[[Category: Boudker, O.]]
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[[Image:Consurf_key_small.gif|200px|right]]
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[[Category: Gouaux, E.]]
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Check<jmol>
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[[Category: Jin, Y.]]
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<jmolCheckbox>
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[[Category: Yernool, D.]]
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/xf/1xfh_consurf.spt"</scriptWhenChecked>
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[[Category: trimeric helical transmembrane protein]]
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sun Nov 25 02:03:15 2007''
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1xfh ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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[[Category: Pyrococcus horikoshii OT3]]
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[[Category: Boudker O]]
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[[Category: Gouaux E]]
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[[Category: Jin Y]]
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[[Category: Yernool D]]

Current revision

Structure of glutamate transporter homolog from Pyrococcus horikoshii

PDB ID 1xfh

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