|
|
| (2 intermediate revisions not shown.) |
| Line 1: |
Line 1: |
| | + | |
| | ==Crystal structure of trimeric frataxin from the yeast Saccharomyces cerevisiae, with full length n-terminus== | | ==Crystal structure of trimeric frataxin from the yeast Saccharomyces cerevisiae, with full length n-terminus== |
| - | <StructureSection load='3oeq' size='340' side='right' caption='[[3oeq]], [[Resolution|resolution]] 2.96Å' scene=''> | + | <StructureSection load='3oeq' size='340' side='right'caption='[[3oeq]], [[Resolution|resolution]] 2.96Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3oeq]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OEQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3OEQ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3oeq]] 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=3OEQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OEQ FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fql|2fql]], [[3oer|3oer]]</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.96Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">YFH1, YDL120W ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae])</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=3oeq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3oeq OCA], [https://pdbe.org/3oeq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3oeq RCSB], [https://www.ebi.ac.uk/pdbsum/3oeq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3oeq ProSAT]</span></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=3oeq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3oeq OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3oeq RCSB], [http://www.ebi.ac.uk/pdbsum/3oeq PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://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> | + | [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> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
| Line 17: |
Line 17: |
| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3oeq" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Frataxin 3D Structures|Frataxin 3D Structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | + | [[Category: Large Structures]] |
| | [[Category: Saccharomyces cerevisiae]] | | [[Category: Saccharomyces cerevisiae]] |
| - | [[Category: Al-Karadaghi, S]] | + | [[Category: Al-Karadaghi S]] |
| - | [[Category: Gakh, O]] | + | [[Category: Gakh O]] |
| - | [[Category: Isaya, G]] | + | [[Category: Isaya G]] |
| - | [[Category: Rajan, S]] | + | [[Category: Rajan S]] |
| - | [[Category: Soderberg, C A.G]] | + | [[Category: Soderberg CAG]] |
| - | [[Category: Ta, C]] | + | [[Category: Ta C]] |
| - | [[Category: Alpha/beta sandwich]]
| + | |
| - | [[Category: Iron-storage]]
| + | |
| - | [[Category: Metallochaperone]]
| + | |
| - | [[Category: Transport protein]]
| + | |
| Structural highlights
Function
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.[1] [2] [3] [4] [5] [6]
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[7]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Babcock M, de Silva D, Oaks R, Davis-Kaplan S, Jiralerspong S, Montermini L, Pandolfo M, Kaplan J. Regulation of mitochondrial iron accumulation by Yfh1p, a putative homolog of frataxin. Science. 1997 Jun 13;276(5319):1709-12. PMID:9180083
- ↑ Radisky DC, Babcock MC, Kaplan J. The yeast frataxin homologue mediates mitochondrial iron efflux. Evidence for a mitochondrial iron cycle. J Biol Chem. 1999 Feb 19;274(8):4497-9. PMID:9988680
- ↑ Gonzalez-Cabo P, Vazquez-Manrique RP, Garcia-Gimeno MA, Sanz P, Palau F. Frataxin interacts functionally with mitochondrial electron transport chain proteins. Hum Mol Genet. 2005 Aug 1;14(15):2091-8. Epub 2005 Jun 16. PMID:15961414 doi:10.1093/hmg/ddi214
- ↑ Gakh O, Park S, Liu G, Macomber L, Imlay JA, Ferreira GC, Isaya G. Mitochondrial iron detoxification is a primary function of frataxin that limits oxidative damage and preserves cell longevity. Hum Mol Genet. 2006 Feb 1;15(3):467-79. Epub 2005 Dec 21. PMID:16371422 doi:10.1093/hmg/ddi461
- ↑ Leidgens S, De Smet S, Foury F. Frataxin interacts with Isu1 through a conserved tryptophan in its beta-sheet. Hum Mol Genet. 2010 Jan 15;19(2):276-86. Epub 2009 Nov 2. PMID:19884169 doi:ddp495
- ↑ Karlberg T, Schagerlof U, Gakh O, Park S, Ryde U, Lindahl M, Leath K, Garman E, Isaya G, Al-Karadaghi S. The structures of frataxin oligomers reveal the mechanism for the delivery and detoxification of iron. Structure. 2006 Oct;14(10):1535-46. PMID:17027502 doi:10.1016/j.str.2006.08.010
- ↑ Soderberg CA, Shkumatov AV, Rajan S, Gakh O, Svergun DI, Isaya G, Al-Karadaghi S. Oligomerization Propensity and Flexibility of Yeast Frataxin Studied by X-ray Crystallography and Small-Angle X-ray Scattering. J Mol Biol. 2011 Dec 16;414(5):783-97. Epub 2011 Oct 25. PMID:22051511 doi:10.1016/j.jmb.2011.10.034
|
