View source for 3p20


==Crystal structure of vanadate bound subunit A of the A1AO ATP synthase==
<StructureSection load='3p20' size='340' side='right'caption='[[3p20]], [[Resolution|resolution]] 2.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3p20]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_horikoshii Pyrococcus horikoshii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3P20 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3P20 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.85&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene>, <scene name='pdbligand=VO4:VANADATE+ION'>VO4</scene></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=3p20 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3p20 OCA], [https://pdbe.org/3p20 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3p20 RCSB], [https://www.ebi.ac.uk/pdbsum/3p20 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3p20 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/AATA_PYRHO AATA_PYRHO] Component of the A-type ATP synthase that produces ATP from ADP in the presence of a proton gradient across the membrane. The A chain is the catalytic subunit.[HAMAP-Rule:MF_00309]
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== Publication Abstract from PubMed ==
Archaeal A-ATP synthases catalyze the formation of the energy currency ATP. The chemical mechanisms of ATP synthesis in A-ATP synthases are unknown. We have solved the crystal structure of a transition-like state of the vanadate-bound form of catalytic subunit A (A(Vi)) of the A-ATP synthase from Pyrococcus horikoshii OT3. Two orthovanadate molecules were observed in the A(Vi) structure, one of which interacts with the phosphate binding loop through residue S238. The second vanadate is positioned in the transient binding site, implicating for the first time the pathway for phosphate entry to the catalytic site. Moreover, since residues K240 and T241 are proposed to be essential for catalysis, the mutant structures of K240A and T241A were also determined. The results demonstrate the importance of these two residues for transition-state stabilization. The structures presented shed light on the diversity of catalytic mechanisms used by the biological motors A- and F-ATP synthases and eukaryotic V-ATPases.

The Transition-Like State and P(i) Entrance into the Catalytic A Subunit of the Biological Engine A-ATP Synthase.,Manimekalai MS, Kumar A, Jeyakanthan J, Gruber G J Mol Biol. 2011 Mar 16. PMID:21396943<ref>PMID:21396943</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3p20" style="background-color:#fffaf0;"></div>

==See Also==
*[[ATPase 3D structures|ATPase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pyrococcus horikoshii]]
[[Category: Gruber G]]
[[Category: Jeyakanthan J]]
[[Category: Kumar A]]
[[Category: Manimekalai MSS]]