View source for 3oer


==Crystal structure of trimeric frataxin from the yeast saccharomyces cerevisiae, complexed with cobalt==
<StructureSection load='3oer' size='340' side='right'caption='[[3oer]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3oer]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OER OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OER 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]] 3.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</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=3oer FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3oer OCA], [https://pdbe.org/3oer PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3oer RCSB], [https://www.ebi.ac.uk/pdbsum/3oer PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3oer ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FRDA_YEAST FRDA_YEAST] Promotes the biosynthesis of heme as well as the assembly and repair of iron-sulfur clusters by delivering Fe(2+) to proteins involved in these pathways. Plays a role in the protection against iron-catalyzed oxidative stress through its ability to catalyze the oxidation of Fe(2+) to Fe(3+). Can store large amounts of the metal in the form of a ferrihydrite mineral by oligomerization. May be involved in regulation of the mitochondrial electron transport chain.<ref>PMID:9180083</ref> <ref>PMID:9988680</ref> <ref>PMID:15961414</ref> <ref>PMID:16371422</ref> <ref>PMID:19884169</ref> <ref>PMID:17027502</ref> 
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== Publication Abstract from PubMed ==
Frataxin is a mitochondrial protein with a central role in iron homeostasis. Defects in frataxin function lead to Friedreich's ataxia, a progressive neurodegenerative disease with childhood onset. The function of frataxin has been shown to be closely associated with its ability to form oligomeric species; however, the factors controlling oligomerization and the types of oligomers present in solution are a matter of debate. Using small-angle X-ray scattering, we found that Co(2+), glycerol, and a single amino acid substitution at the N-terminus, Y73A, facilitate oligomerization of yeast frataxin, resulting in a dynamic equilibrium between monomers, dimers, trimers, hexamers, and higher-order oligomers. Using X-ray crystallography, we found that Co(2+) binds inside the channel at the 3-fold axis of the trimer, which suggests that the metal has an oligomer-stabilizing role. The results reveal the types of oligomers present in solution and support our earlier suggestions that the trimer is the main building block of yeast frataxin oligomers. They also indicate that different mechanisms may control oligomer stability and oligomerization in vivo.

Oligomerization Propensity and Flexibility of Yeast Frataxin Studied by X-ray Crystallography and Small-Angle X-ray Scattering.,Soderberg CA, Shkumatov AV, Rajan S, Gakh O, Svergun DI, Isaya G, Al-Karadaghi S J Mol Biol. 2011 Dec 16;414(5):783-97. Epub 2011 Oct 25. PMID:22051511<ref>PMID:22051511</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 3oer" style="background-color:#fffaf0;"></div>

==See Also==
*[[Frataxin 3D Structures|Frataxin 3D Structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Al-Karadaghi S]]
[[Category: Gakh O]]
[[Category: Isaya G]]
[[Category: Rajan S]]
[[Category: Soderberg CAG]]
[[Category: Ta C]]