1a9w

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{{Seed}}
 
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[[Image:1a9w.png|left|200px]]
 
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==HUMAN EMBRYONIC GOWER II CARBONMONOXY HEMOGLOBIN==
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The line below this paragraph, containing "STRUCTURE_1a9w", creates the "Structure Box" on the page.
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<StructureSection load='1a9w' size='340' side='right'caption='[[1a9w]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1a9w]] 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=1A9W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1A9W FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 2.9&#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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{{STRUCTURE_1a9w| PDB=1a9w | SCENE= }}
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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=1a9w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1a9w OCA], [https://pdbe.org/1a9w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1a9w RCSB], [https://www.ebi.ac.uk/pdbsum/1a9w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1a9w ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/HBE_HUMAN HBE_HUMAN] The epsilon chain is a beta-type chain of early mammalian embryonic hemoglobin.
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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/a9/1a9w_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=1a9w 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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The production of recombinant embryonic haemoglobins via a yeast expression system has enabled structural and functional studies to be conducted on these proteins. As part of a programme aimed at understanding the properties of the embryonic haemoglobins we have crystallized the human alpha2 epsilon2 (Gower II) embryonic haemoglobin in its carbonmonoxy form, and determined its structure by X-ray crystallography. The structure was solved by molecular replacement and refined at 2.9 A to give a final model with R-factor=0.185 and Rfree=0.235. The Gower II hemoglobin tetramer is intermediate between the adult R and R2 states, though closer to R2. The tertiary structure of the conserved alpha subunit is essentially identical when compared to that found in the adult (alpha2 beta2) and fetal (alpha2 gamma2) hemoglobins. The embryonic epsilon subunit has a structure very similar to that of the homologous adult beta and fetal gamma subunits, although with small differences at the N terminus and in the A helix. Amino acid substitutions can be identified that may play a role in the altered response of the Gower II haemoglobin to allosteric effectors, in particular chloride ions. The reduced chloride effect is thought to be the primary cause of the higher affinity of this embryonic hemoglobin in comparison to the adult molecule.
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===HUMAN EMBRYONIC GOWER II CARBONMONOXY HEMOGLOBIN===
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Crystal structure of a human embryonic haemoglobin: the carbonmonoxy form of gower II (alpha2 epsilon2) haemoglobin at 2.9 A resolution.,Sutherland-Smith AJ, Baker HM, Hofmann OM, Brittain T, Baker EN J Mol Biol. 1998 Jul 17;280(3):475-84. PMID:9665850<ref>PMID:9665850</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 1a9w" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_9665850}}, adds the Publication Abstract to the page
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*[[Hemoglobin 3D structures|Hemoglobin 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 9665850 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_9665850}}
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__TOC__
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</StructureSection>
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==About this Structure==
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1A9W is a 4 chains structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1A9W OCA].
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==Reference==
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<ref group="xtra">PMID:9665850</ref><references group="xtra"/>
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Baker, E N.]]
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[[Category: Large Structures]]
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[[Category: Baker, H M.]]
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[[Category: Baker EN]]
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[[Category: Brittain, T.]]
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[[Category: Baker HM]]
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[[Category: Hofmann, O M.]]
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[[Category: Brittain T]]
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[[Category: Sutherland-Smith, A J.]]
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[[Category: Hofmann OM]]
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[[Category: Oxygen transport]]
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[[Category: Sutherland-Smith AJ]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Feb 18 08:19:51 2009''
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Current revision

HUMAN EMBRYONIC GOWER II CARBONMONOXY HEMOGLOBIN

PDB ID 1a9w

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