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1o7y

From Proteopedia

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[[Image:1o7y.gif|left|200px]]<br />
 
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<applet load="1o7y" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1o7y, resolution 3.00&Aring;" />
 
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'''CRYSTAL STRUCTURE OF IP-10 M-FORM'''<br />
 
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==Overview==
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==Crystal structure of IP-10 M-form==
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We have determined the structure of wild-type IP-10 from three crystal, forms. The crystals provide eight separate models of the IP-10 chain, all, differing substantially from a monomeric IP-10 variant examined previously, by NMR spectroscopy. In each crystal form, IP-10 chains form conventional, beta sheet dimers, which, in turn, form a distinct tetrameric assembly., The M form tetramer is reminiscent of platelet factor 4, whereas the T and, H forms feature a novel twelve-stranded beta sheet. Analytical, ultracentrifugation indicates that, in free solution, IP-10 exists in a, monomer-dimer equilibrium with a dissociation constant of 9 microM. We, propose that the tetrameric structures may represent species promoted by, the binding of glycosaminoglycans. The binding sites for several, ... [[http://ispc.weizmann.ac.il/pmbin/getpm?12737818 (full description)]]
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<StructureSection load='1o7y' size='340' side='right'caption='[[1o7y]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1o7y]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O7Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1O7Y FirstGlance]. <br>
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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]] 3&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=1o7y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o7y OCA], [https://pdbe.org/1o7y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1o7y RCSB], [https://www.ebi.ac.uk/pdbsum/1o7y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1o7y ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CXL10_HUMAN CXL10_HUMAN] Chemotactic for monocytes and T-lymphocytes. Binds to CXCR3.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/o7/1o7y_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1o7y ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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We have determined the structure of wild-type IP-10 from three crystal forms. The crystals provide eight separate models of the IP-10 chain, all differing substantially from a monomeric IP-10 variant examined previously by NMR spectroscopy. In each crystal form, IP-10 chains form conventional beta sheet dimers, which, in turn, form a distinct tetrameric assembly. The M form tetramer is reminiscent of platelet factor 4, whereas the T and H forms feature a novel twelve-stranded beta sheet. Analytical ultracentrifugation indicates that, in free solution, IP-10 exists in a monomer-dimer equilibrium with a dissociation constant of 9 microM. We propose that the tetrameric structures may represent species promoted by the binding of glycosaminoglycans. The binding sites for several IP-10-neutralizing mAbs have also been mapped.
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==About this Structure==
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Crystal structures of oligomeric forms of the IP-10/CXCL10 chemokine.,Swaminathan GJ, Holloway DE, Colvin RA, Campanella GK, Papageorgiou AC, Luster AD, Acharya KR Structure. 2003 May;11(5):521-32. PMID:12737818<ref>PMID:12737818</ref>
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1O7Y is a [[http://en.wikipedia.org/wiki/Single_protein Single protein]] structure of sequence from [[http://en.wikipedia.org/wiki/ ]] with SO4 as [[http://en.wikipedia.org/wiki/ligand ligand]]. Structure known Active Site: AC1. Full crystallographic information is available from [[http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1O7Y OCA]].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Crystal structures of oligomeric forms of the IP-10/CXCL10 chemokine., Swaminathan GJ, Holloway DE, Colvin RA, Campanella GK, Papageorgiou AC, Luster AD, Acharya KR, Structure. 2003 May;11(5):521-32. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12737818 12737818]
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</div>
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[[Category: Single protein]]
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<div class="pdbe-citations 1o7y" style="background-color:#fffaf0;"></div>
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[[Category: Acharya, K.R.]]
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[[Category: Holloway, D.E.]]
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[[Category: Papageorgiou, A.C.]]
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[[Category: Swaminathan, G.J.]]
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[[Category: SO4]]
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[[Category: chemokine]]
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[[Category: chemotaxis]]
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[[Category: inflammatory response]]
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[[Category: interferon induction]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Oct 30 15:45:53 2007''
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==See Also==
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*[[C-X-C motif chemokine 3D structures|C-X-C motif chemokine 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Homo sapiens]]
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[[Category: Large Structures]]
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[[Category: Acharya KR]]
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[[Category: Holloway DE]]
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[[Category: Papageorgiou AC]]
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[[Category: Swaminathan GJ]]

Current revision

Crystal structure of IP-10 M-form

PDB ID 1o7y

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