1fr3

<table><tr><td colspan='2'>[[1fr3]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Sporomusa_ovata Sporomusa ovata]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FR3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1FR3 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><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=1fr3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fr3 OCA], [http://pdbe.org/1fr3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1fr3 RCSB], [http://www.ebi.ac.uk/pdbsum/1fr3 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1fr3 ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

BACKGROUND: Transport of molybdenum into bacteria involves a high-affinity ABC transporter system whose expression is controlled by a repressor protein called ModE. While molybdate transport is tightly coupled to utilization in some bacteria, other organisms have molybdenum storage proteins. One class of putative molybdate storage proteins is characterized by a sequence consisting of about 70 amino acids (Mop). A tandem repeat of Mop sequences also constitutes the molybdate binding domain of ModE. RESULTS: We have determined the crystal structure of the 7 kDa Mop protein from the methanol-utilizing anaerobic eubacterium Sporomusa ovata grown in the presence of molybdate and tungstate. The protein occurs as highly symmetric hexamers binding eight oxyanions. Each peptide assumes a so-called OB fold, which has previously also been observed in ModE. There are two types of oxyanion binding sites in Mo at the interface between two or three peptides. All oxyanion binding sites were found to be occupied by WO(4) rather than MoO(4). CONCLUSIONS: The biological function of proteins containing only Mop sequences is unknown, but they have been implicated in molybdate homeostasis and molybdopterin cofactor biosynthesis. While there are few indications that the S. ovata Mop binds pterin, the structure suggests that only the type-1 oxyanion binding sites would be sufficiently accessible to bind a cofactor. The observed occupation of the oxyanion binding sites by WO(4) indicates that Mop might also be involved in controlling intracellular tungstate levels.

Structure of the molybdate/tungstate binding protein mop from Sporomusa ovata.,Wagner UG, Stupperich E, Kratky C Structure. 2000 Nov 15;8(11):1127-36. PMID:11080635<ref>PMID:11080635</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Kratky, C]]

[[Category: Stupperich, E]]

[[Category: Wagner, U G]]

[[Category: Tungstate]]