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''' | ==Structure of a unique ATP synthase subunit NeqB from Nanoarcheaum equitans== | ||
<StructureSection load='5bo5' size='340' side='right' caption='[[5bo5]], [[Resolution|resolution]] 2.81Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5bo5]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5BO5 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5BO5 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=SO4:SULFATE+ION'>SO4</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5bn3|5bn3]], [[5bn4|5bn4]], [[5bn5|5bn5]]</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=5bo5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5bo5 OCA], [http://pdbe.org/5bo5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5bo5 RCSB], [http://www.ebi.ac.uk/pdbsum/5bo5 PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
ATP synthesis is a critical and universal life process carried out by ATP synthases. Whereas eukaryotic and prokaryotic ATP synthases are well characterized, archaeal ATP synthases are relatively poorly understood. The hyperthermophilic archaeal parasite, Nanoarcheaum equitans lacks several subunits of the ATP synthase and is suspected to be energetically dependent on its host, Ignicoccus hospitalis. This suggests that this ATP synthase might be a rudimentary machine. Here, we report the crystal structure and biophysical studies of the regulatory subunit, NeqB, the apo NeqAB, and NeqAB in complex with nucleotides, ADP and AMP-PNP. NeqB is approximately 20 amino acids shorter at its C-terminus than its homologs but this does not impede its binding with NeqA to form the complex. The heterodimeric NeqAB complex assumes a closed, rigid conformation irrespective of nucleotide binding; this differs from its homologs, which require conformational changes for catalytic activity. Thus, although N. equitans possesses an ATP synthase core A3B3 hexameric complex, it might not function as a bona fide ATP synthase. | |||
Structural basis for a unique ATP synthase core complex from Nanoarcheaum Equitans.,Mohanty S, Jobichen C, Chichili VP, Velazquez-Campoy A, Low BC, Hogue CW, Sivaraman J J Biol Chem. 2015 Sep 14. pii: jbc.M115.677492. PMID:26370083<ref>PMID:26370083</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 5bo5" style="background-color:#fffaf0;"></div> | |||
[[Category: | == References == | ||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Chichili, V P.R]] | |||
[[Category: Jobichen, C]] | [[Category: Jobichen, C]] | ||
[[Category: Mohanty, S]] | [[Category: Mohanty, S]] | ||
[[Category: Sivaraman, J]] | [[Category: Sivaraman, J]] | ||
[[Category: Atp synthase]] | |||
[[Category: Catalytic core]] | |||
[[Category: Hydrolase]] | |||
[[Category: Nanoarcheaum equitan]] | |||
Revision as of 00:50, 16 October 2015
Structure of a unique ATP synthase subunit NeqB from Nanoarcheaum equitansStructure of a unique ATP synthase subunit NeqB from Nanoarcheaum equitans
Structural highlights
Publication Abstract from PubMedATP synthesis is a critical and universal life process carried out by ATP synthases. Whereas eukaryotic and prokaryotic ATP synthases are well characterized, archaeal ATP synthases are relatively poorly understood. The hyperthermophilic archaeal parasite, Nanoarcheaum equitans lacks several subunits of the ATP synthase and is suspected to be energetically dependent on its host, Ignicoccus hospitalis. This suggests that this ATP synthase might be a rudimentary machine. Here, we report the crystal structure and biophysical studies of the regulatory subunit, NeqB, the apo NeqAB, and NeqAB in complex with nucleotides, ADP and AMP-PNP. NeqB is approximately 20 amino acids shorter at its C-terminus than its homologs but this does not impede its binding with NeqA to form the complex. The heterodimeric NeqAB complex assumes a closed, rigid conformation irrespective of nucleotide binding; this differs from its homologs, which require conformational changes for catalytic activity. Thus, although N. equitans possesses an ATP synthase core A3B3 hexameric complex, it might not function as a bona fide ATP synthase. Structural basis for a unique ATP synthase core complex from Nanoarcheaum Equitans.,Mohanty S, Jobichen C, Chichili VP, Velazquez-Campoy A, Low BC, Hogue CW, Sivaraman J J Biol Chem. 2015 Sep 14. pii: jbc.M115.677492. PMID:26370083[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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