View source for 4wzb


==Crystal Structure of MgAMPPCP-bound Av2-Av1 complex==
<StructureSection load='4wzb' size='340' side='right'caption='[[4wzb]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4wzb]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2afk 2afk]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WZB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4WZB FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <scene name='pdbligand=CLF:FE(8)-S(7)+CLUSTER'>CLF</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=HCA:3-HYDROXY-3-CARBOXY-ADIPIC+ACID'>HCA</scene>, <scene name='pdbligand=ICS:IRON-SULFUR-MOLYBDENUM+CLUSTER+WITH+INTERSTITIAL+CARBON'>ICS</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</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=4wzb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wzb OCA], [https://pdbe.org/4wzb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4wzb RCSB], [https://www.ebi.ac.uk/pdbsum/4wzb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4wzb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NIFD_AZOVI NIFD_AZOVI] This molybdenum-iron protein is part of the nitrogenase complex that catalyzes the key enzymatic reactions in nitrogen fixation.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Adenosine triphosphate (ATP) hydrolysis in the nitrogenase complex controls the cycle of association and dissociation between the electron donor adenosine triphosphatase (ATPase) (Fe-protein) and its target catalytic protein (MoFe-protein), driving the reduction of dinitrogen into ammonia. Crystal structures in different nucleotide states have been determined that identify conformational changes in the nitrogenase complex during ATP turnover. These structures reveal distinct and mutually exclusive interaction sites on the MoFe-protein surface that are selectively populated, depending on the Fe-protein nucleotide state. A consequence of these different docking geometries is that the distance between redox cofactors, a critical determinant of the intermolecular electron transfer rate, is coupled to the nucleotide state. More generally, stabilization of distinct docking geometries by different nucleotide states, as seen for nitrogenase, could enable nucleotide hydrolysis to drive the relative motion of protein partners in molecular motors and other systems.

Nitrogenase complexes: multiple docking sites for a nucleotide switch protein.,Tezcan FA, Kaiser JT, Mustafi D, Walton MY, Howard JB, Rees DC Science. 2005 Aug 26;309(5739):1377-80. PMID:16123301<ref>PMID:16123301</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4wzb" style="background-color:#fffaf0;"></div>

==See Also==
*[[Nitrogenase 3D structures|Nitrogenase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Azotobacter vinelandii]]
[[Category: Large Structures]]
[[Category: Howard JB]]
[[Category: Kaiser JT]]
[[Category: Mustafi D]]
[[Category: Rees DC]]
[[Category: Tezcan FA]]
[[Category: Walton MY]]