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| | ==Crystal structure of Thermotoga maritima sodium pumping membrane integral pyrophosphatase in complex with tungstate and magnesium== | | ==Crystal structure of Thermotoga maritima sodium pumping membrane integral pyrophosphatase in complex with tungstate and magnesium== |
| - | <StructureSection load='5lzr' size='340' side='right' caption='[[5lzr]], [[Resolution|resolution]] 4.00Å' scene=''> | + | <StructureSection load='5lzr' size='340' side='right'caption='[[5lzr]], [[Resolution|resolution]] 4.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5lzr]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LZR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5LZR FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5lzr]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima_MSB8 Thermotoga maritima MSB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LZR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5LZR FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=WO4:TUNGSTATE(VI)ION'>WO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 4Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Inorganic_diphosphatase Inorganic diphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.1 3.6.1.1] </span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=WO4:TUNGSTATE(VI)ION'>WO4</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5lzr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5lzr OCA], [http://pdbe.org/5lzr PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5lzr RCSB], [http://www.ebi.ac.uk/pdbsum/5lzr PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5lzr 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=5lzr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5lzr OCA], [https://pdbe.org/5lzr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5lzr RCSB], [https://www.ebi.ac.uk/pdbsum/5lzr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5lzr ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/HPPA_THEMA HPPA_THEMA]] Sodium pump that utilizes the energy of pyrophosphate hydrolysis as the driving force for Na(+) movement across the membrane.[HAMAP-Rule:MF_01129]<ref>PMID:11343697</ref> <ref>PMID:17605473</ref> <ref>PMID:22837527</ref> | + | [https://www.uniprot.org/uniprot/HPPA_THEMA HPPA_THEMA] Sodium pump that utilizes the energy of pyrophosphate hydrolysis as the driving force for Na(+) movement across the membrane.[HAMAP-Rule:MF_01129]<ref>PMID:11343697</ref> <ref>PMID:17605473</ref> <ref>PMID:22837527</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Inorganic diphosphatase]] | + | [[Category: Large Structures]] |
| - | [[Category: Goldman, A]] | + | [[Category: Thermotoga maritima MSB8]] |
| - | [[Category: Kajander, T]] | + | [[Category: Goldman A]] |
| - | [[Category: Kellosalo, J]] | + | [[Category: Kajander T]] |
| - | [[Category: Wilkinson, C]] | + | [[Category: Kellosalo J]] |
| - | [[Category: Pyrophosphatase]]
| + | [[Category: Wilkinson C]] |
| - | [[Category: Transport protein]]
| + | |
| - | [[Category: Tungstate]]
| + | |
| Structural highlights
Function
HPPA_THEMA Sodium pump that utilizes the energy of pyrophosphate hydrolysis as the driving force for Na(+) movement across the membrane.[HAMAP-Rule:MF_01129][1] [2] [3]
Publication Abstract from PubMed
Membrane-bound pyrophosphatases (M-PPases), which couple proton/sodium ion transport to pyrophosphate synthesis/hydrolysis, are important in abiotic stress resistance and in the infectivity of protozoan parasites. Here, three M-PPase structures in different catalytic states show that closure of the substrate-binding pocket by helices 5-6 affects helix 13 in the dimer interface and causes helix 12 to move down. This springs a 'molecular mousetrap', repositioning a conserved aspartate and activating the nucleophilic water. Corkscrew motion at helices 6 and 16 rearranges the key ionic gate residues and leads to ion pumping. The pumped ion is above the ion gate in one of the ion-bound structures, but below it in the other. Electrometric measurements show a single-turnover event with a non-hydrolysable inhibitor, supporting our model that ion pumping precedes hydrolysis. We propose a complete catalytic cycle for both proton and sodium-pumping M-PPases, and one that also explains the basis for ion specificity.
Membrane pyrophosphatases from Thermotoga maritima and Vigna radiata suggest a conserved coupling mechanism.,Li KM, Wilkinson C, Kellosalo J, Tsai JY, Kajander T, Jeuken LJ, Sun YJ, Goldman A Nat Commun. 2016 Dec 6;7:13596. doi: 10.1038/ncomms13596. PMID:27922000[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Perez-Castineira JR, Lopez-Marques RL, Losada M, Serrano A. A thermostable K(+)-stimulated vacuolar-type pyrophosphatase from the hyperthermophilic bacterium Thermotoga maritima. FEBS Lett. 2001 May 4;496(1):6-11. PMID:11343697
- ↑ Malinen AM, Belogurov GA, Baykov AA, Lahti R. Na+-pyrophosphatase: a novel primary sodium pump. Biochemistry. 2007 Jul 31;46(30):8872-8. Epub 2007 Jul 3. PMID:17605473 doi:http://dx.doi.org/10.1021/bi700564b
- ↑ Kellosalo J, Kajander T, Kogan K, Pokharel K, Goldman A. The structure and catalytic cycle of a sodium-pumping pyrophosphatase. Science. 2012 Jul 27;337(6093):473-6. PMID:22837527 doi:10.1126/science.1222505
- ↑ Li KM, Wilkinson C, Kellosalo J, Tsai JY, Kajander T, Jeuken LJ, Sun YJ, Goldman A. Membrane pyrophosphatases from Thermotoga maritima and Vigna radiata suggest a conserved coupling mechanism. Nat Commun. 2016 Dec 6;7:13596. doi: 10.1038/ncomms13596. PMID:27922000 doi:http://dx.doi.org/10.1038/ncomms13596
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