4d0a: Difference between revisions
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New page: '''Unreleased structure''' The entry 4d0a is ON HOLD until sometime in the future Authors: Paulino, C., Woehlert, D., Yildiz, O., Kuhlbrandt, W. Description: 3D EM map of the sodium pr... |
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The | ==3D EM map of the sodium proton antiporter MjNhaP1 from Methanocaldococcus jannaschii== | ||
<StructureSection load='4d0a' size='340' side='right'caption='[[4d0a]], [[Resolution|resolution]] 6.00Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4d0a]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii_DSM_2661 Methanocaldococcus jannaschii DSM 2661]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4D0A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4D0A FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron crystallography, [[Resolution|Resolution]] 6Å</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=4d0a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4d0a OCA], [https://pdbe.org/4d0a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4d0a RCSB], [https://www.ebi.ac.uk/pdbsum/4d0a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4d0a ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/NAH1_METJA NAH1_METJA] This is a Na(+)/H(+) antiporter. Can also transport lithium.<ref>PMID:12220668</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Sodium/proton antiporters are essential for sodium and pH homeostasis and play a major role in human health and disease. We determined the structures of the archaeal sodium/proton antiporter MjNhaP1 in two complementary states. The inward-open state was obtained by x-ray crystallography in the presence of sodium at pH8, where the transporter is highly active. The outward-open state was obtained by electron crystallography without sodium at pH4, where MjNhaP1 is inactive. Comparison of both structures reveals a 7{degree sign} tilt of the 6 helix bundle. 22Na+ uptake measurements indicate non-cooperative transport with an activity maximum at pH7.5. We conclude that binding of a Na+ ion from the outside induces helix movements that close the extracellular cavity, open the cytoplasmic funnel, and result in a ~5 A vertical relocation of the ion binding site to release the substrate ion into the cytoplasm. | |||
Structure and transport mechanism of the sodium/protonantiporter MjNhaP1.,Paulino C, Wohlert D, Kapotova E, Yildiz O, Kuhlbrandt W Elife. 2014 Nov 26;3. doi: 10.7554/eLife.03583. PMID:25426803<ref>PMID:25426803</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4d0a" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Methanocaldococcus jannaschii DSM 2661]] | |||
[[Category: Kuhlbrandt W]] | |||
[[Category: Paulino C]] | |||
[[Category: Woehlert D]] | |||
[[Category: Yildiz O]] | |||
Latest revision as of 12:18, 20 December 2023
3D EM map of the sodium proton antiporter MjNhaP1 from Methanocaldococcus jannaschii
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