4d0a
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==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]] | ||
Current revision
3D EM map of the sodium proton antiporter MjNhaP1 from Methanocaldococcus jannaschii
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