1g0a

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[[Image:1g0a.jpg|left|200px]]<br /><applet load="1g0a" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1g0a, resolution 2.04&Aring;" />
 
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'''CARBONMONOXY LIGANDED BOVINE HEMOGLOBIN PH 8.5'''<br />
 
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==Overview==
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==CARBONMONOXY LIGANDED BOVINE HEMOGLOBIN PH 8.5==
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Initial crystallographic studies suggested that fully liganded mammalian hemoglobin can adopt only a single quaternary structure, the quaternary R structure. However, more recent crystallographic studies revealed the existence of a second quaternary structure for liganded hemoglobin, the quaternary R2 structure. Since these quaternary structures can be crystallized, both must be energetically accessible structures that coexist in solution. Unanswered questions include (i) the relative abundance of the R and R2 structures under various solution conditions and (ii) whether other quaternary structures are energetically accessible for the liganded alpha(2)beta(2) hemoglobin tetramer. Although crystallographic methods cannot directly answer the first question, they represent the most direct and most accurate approach to answering the second question. We now have determined and refined three different crystal structures of bovine carbonmonoxyhemoglobin. These structures provide clear evidence that the dimer-dimer interface of liganded hemoglobin has a wide range of energetically accessible structures that are related to each other by a simple sliding motion. The dimer-dimer interface acts as a "molecular slide bearing" that allows the two alpha beta dimers to slide back and forth without greatly altering the number or the nature of the intersubunit contacts. Since the general stereochemical features of this interface are not unusual, it is likely that interface sliding of the kind displayed by fully liganded hemoglobin plays important structural and functional roles in many other protein assemblies.
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<StructureSection load='1g0a' size='340' side='right'caption='[[1g0a]], [[Resolution|resolution]] 2.04&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1g0a]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G0A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1G0A 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]] 2.04&#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=CMO:CARBON+MONOXIDE'>CMO</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</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=1g0a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1g0a OCA], [https://pdbe.org/1g0a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1g0a RCSB], [https://www.ebi.ac.uk/pdbsum/1g0a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1g0a ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/HBA_BOVIN HBA_BOVIN] Involved in oxygen transport from the lung to the various peripheral tissues.
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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/g0/1g0a_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=1g0a ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1G0A is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with <scene name='pdbligand=HEM:'>HEM</scene> and <scene name='pdbligand=CMO:'>CMO</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1G0A OCA].
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*[[Hemoglobin 3D structures|Hemoglobin 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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Interface sliding as illustrated by the multiple quaternary structures of liganded hemoglobin., Mueser TC, Rogers PH, Arnone A, Biochemistry. 2000 Dec 19;39(50):15353-64. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11112521 11112521]
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[[Category: Bos taurus]]
[[Category: Bos taurus]]
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[[Category: Protein complex]]
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[[Category: Large Structures]]
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[[Category: Arnone, A.]]
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[[Category: Arnone A]]
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[[Category: Mueser, T C.]]
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[[Category: Mueser TC]]
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[[Category: Rogers, P H.]]
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[[Category: Rogers PH]]
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[[Category: CMO]]
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[[Category: HEM]]
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[[Category: bovine]]
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[[Category: carbonmonoxy]]
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[[Category: hemoglobin]]
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[[Category: liganded]]
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[[Category: protoporphyrin ix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:44:36 2008''
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Current revision

CARBONMONOXY LIGANDED BOVINE HEMOGLOBIN PH 8.5

PDB ID 1g0a

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