3snp

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Current revision (13:02, 14 March 2024) (edit) (undo)
 
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<StructureSection load='3snp' size='340' side='right'caption='[[3snp]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
<StructureSection load='3snp' size='340' side='right'caption='[[3snp]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3snp]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/European_rabbit European rabbit]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2ipy 2ipy]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SNP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SNP FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3snp]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus] and [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2ipy 2ipy]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SNP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SNP FirstGlance]. <br>
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</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2ipy|2ipy]], [[3sn2|3sn2]]</div></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ACO1, FRP, IREB1, IREBP, IRP1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9986 European rabbit])</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Aconitate_hydratase Aconitate hydratase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.3 4.2.1.3] </span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3snp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3snp OCA], [https://pdbe.org/3snp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3snp RCSB], [https://www.ebi.ac.uk/pdbsum/3snp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3snp ProSAT]</span></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=3snp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3snp OCA], [https://pdbe.org/3snp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3snp RCSB], [https://www.ebi.ac.uk/pdbsum/3snp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3snp ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[https://www.uniprot.org/uniprot/ACOC_RABIT ACOC_RABIT]] Iron sensor. Binds a 4Fe-4S cluster and functions as aconitase when cellular iron levels are high. Functions as mRNA binding protein that regulates uptake, sequestration and utilization of iron when cellular iron levels are low. Binds to iron-responsive elements (IRES) in target mRNA species when iron levels are low. Binding of a 4Fe-4S cluster precludes RNA binding (By similarity). Catalyzes the isomerization of citrate to isocitrate via cis-aconitate (By similarity).
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[https://www.uniprot.org/uniprot/ACOHC_RABIT ACOHC_RABIT] Bifunctional iron sensor that switches between 2 activities depending on iron availability (By similarity). Iron deprivation, promotes its mRNA binding activity through which it regulates the expression of genes involved in iron uptake, sequestration and utilization (PubMed:17185597). Binds to iron-responsive elements (IRES) in the untranslated region of target mRNAs preventing for instance the translation of ferritin and aminolevulinic acid synthase and stabilizing the transferrin receptor mRNA (PubMed:17185597).[UniProtKB:P21399]<ref>PMID:17185597</ref> Conversely, when cellular iron levels are high, binds a 4Fe-4S cluster which precludes RNA binding activity and promotes the aconitase activity, the isomerization of citrate to isocitrate via cis-aconitate.[UniProtKB:P21399]
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Iron regulatory protein 1 (IRP1) binds iron-responsive elements (IREs) in messenger RNAs (mRNAs), to repress translation or degradation, or binds an iron-sulfur cluster, to become a cytosolic aconitase enzyme. The 2.8 angstrom resolution crystal structure of the IRP1:ferritin H IRE complex shows an open protein conformation compared with that of cytosolic aconitase. The extended, L-shaped IRP1 molecule embraces the IRE stem-loop through interactions at two sites separated by approximately 30 angstroms, each involving about a dozen protein:RNA bonds. Extensive conformational changes related to binding the IRE or an iron-sulfur cluster explain the alternate functions of IRP1 as an mRNA regulator or enzyme.
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Structure of dual function iron regulatory protein 1 complexed with ferritin IRE-RNA.,Walden WE, Selezneva AI, Dupuy J, Volbeda A, Fontecilla-Camps JC, Theil EC, Volz K Science. 2006 Dec 22;314(5807):1903-8. PMID:17185597<ref>PMID:17185597</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 3snp" style="background-color:#fffaf0;"></div>
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==See Also==
==See Also==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Aconitate hydratase]]
 
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[[Category: European rabbit]]
 
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Selezneva, A I]]
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[[Category: Oryctolagus cuniculus]]
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[[Category: Volz, K]]
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[[Category: Xenopus laevis]]
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[[Category: Walden, W E]]
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[[Category: Selezneva AI]]
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[[Category: Iron sulfur cluster binding]]
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[[Category: Volz K]]
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[[Category: Lyase-rna complex]]
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[[Category: Walden WE]]
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[[Category: Phosphorylation]]
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[[Category: Rna binding]]
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Current revision

Crystal structure analysis of iron regulatory protein 1 in complex with ferritin H IRE RNA

PDB ID 3snp

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