View source for 1y8i


==Horse methemoglobin low salt, PH 7.0 (98% relative humidity)==
<StructureSection load='1y8i' size='340' side='right'caption='[[1y8i]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1y8i]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Equus_caballus Equus caballus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Y8I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1Y8I 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]] 2.6&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</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=1y8i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y8i OCA], [https://pdbe.org/1y8i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1y8i RCSB], [https://www.ebi.ac.uk/pdbsum/1y8i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1y8i ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/HBA_HORSE HBA_HORSE] Involved in oxygen transport from the lung to the various peripheral tissues.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/y8/1y8i_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1y8i ConSurf].
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== Publication Abstract from PubMed ==
A new relaxed state has been characterized in the crystals of horse methemoglobin grown at neutral pH at low ionic concentration and their low humidity variants. The crystals provide an example for improvement in X-ray diffraction quality with reduced solvent content. Only the classical R state has been so far observed in liganded horse hemoglobin. The state characterized in the present study lies in between the R state and the R2 state characterized earlier in liganded human hemoglobin. The results presented here, along with those of earlier studies, suggest that relaxed and tense hemoglobin can access ensembles of states.

A new relaxed state in horse methemoglobin characterized by crystallographic studies.,Sankaranarayanan R, Biswal BK, Vijayan M Proteins. 2005 Aug 15;60(3):547-51. PMID:15887226<ref>PMID:15887226</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 1y8i" style="background-color:#fffaf0;"></div>

==See Also==
*[[Hemoglobin 3D structures|Hemoglobin 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Equus caballus]]
[[Category: Large Structures]]
[[Category: Biswal BK]]
[[Category: Sankaranarayanan R]]
[[Category: Vijayan M]]