1v4x

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[[Image:1v4x.jpg|left|200px]]
 
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==Crystal structure of bluefin tuna hemoglobin deoxy form at pH5.0==
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The line below this paragraph, containing "STRUCTURE_1v4x", creates the "Structure Box" on the page.
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<StructureSection load='1v4x' size='340' side='right'caption='[[1v4x]], [[Resolution|resolution]] 1.60&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'>[[1v4x]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Thunnus_thynnus Thunnus thynnus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V4X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1V4X 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]] 1.6&#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=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
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{{STRUCTURE_1v4x| PDB=1v4x | 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=1v4x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1v4x OCA], [https://pdbe.org/1v4x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1v4x RCSB], [https://www.ebi.ac.uk/pdbsum/1v4x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1v4x ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/Q8AYM0_THUTH Q8AYM0_THUTH]
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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/v4/1v4x_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=1v4x 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 crystal structure of hemoglobin has been known for several decades, yet various features of the molecule remain unexplained or controversial. Several animal hemoglobins have properties that cannot be readily explained in terms of their amino acid sequence and known atomic models of hemoglobin. Among these, fish hemoglobins are well known for their widely varying interactions with heterotropic effector molecules and pH sensitivity. Some fish hemoglobins are almost completely insensitive to pH (within physiological limits), whereas others show extremely low oxygen affinity under acid conditions, a phenomenon called the Root effect. X-ray crystal structures of Root effect hemoglobins have not, to date, provided convincing explanations of this effect. Sequence alignments have signally failed to pinpoint the residues involved, and site-directed mutagenesis has not yielded a human hemoglobin variant with this property. We have solved the crystal structure of tuna hemoglobin in the deoxy form at low and moderate pH and in the presence of carbon monoxide at high pH. A comparison of these models shows clear evidence for novel mechanisms of pH-dependent control of ligand affinity.
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'''Crystal structure of bluefin tuna hemoglobin deoxy form at pH5.0'''
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Novel mechanisms of pH sensitivity in tuna hemoglobin: a structural explanation of the root effect.,Yokoyama T, Chong KT, Miyazaki G, Morimoto H, Shih DT, Unzai S, Tame JR, Park SY J Biol Chem. 2004 Jul 2;279(27):28632-40. Epub 2004 Apr 26. PMID:15117955<ref>PMID:15117955</ref>
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==Overview==
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The crystal structure of hemoglobin has been known for several decades, yet various features of the molecule remain unexplained or controversial. Several animal hemoglobins have properties that cannot be readily explained in terms of their amino acid sequence and known atomic models of hemoglobin. Among these, fish hemoglobins are well known for their widely varying interactions with heterotropic effector molecules and pH sensitivity. Some fish hemoglobins are almost completely insensitive to pH (within physiological limits), whereas others show extremely low oxygen affinity under acid conditions, a phenomenon called the Root effect. X-ray crystal structures of Root effect hemoglobins have not, to date, provided convincing explanations of this effect. Sequence alignments have signally failed to pinpoint the residues involved, and site-directed mutagenesis has not yielded a human hemoglobin variant with this property. We have solved the crystal structure of tuna hemoglobin in the deoxy form at low and moderate pH and in the presence of carbon monoxide at high pH. A comparison of these models shows clear evidence for novel mechanisms of pH-dependent control of ligand affinity.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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1V4X is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Thunnus_thynnus Thunnus thynnus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V4X OCA].
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</div>
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<div class="pdbe-citations 1v4x" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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Novel mechanisms of pH sensitivity in tuna hemoglobin: a structural explanation of the root effect., Yokoyama T, Chong KT, Miyazaki G, Morimoto H, Shih DT, Unzai S, Tame JR, Park SY, J Biol Chem. 2004 Jul 2;279(27):28632-40. Epub 2004 Apr 26. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15117955 15117955]
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*[[Hemoglobin 3D structures|Hemoglobin 3D structures]]
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[[Category: Protein complex]]
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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: Large Structures]]
[[Category: Thunnus thynnus]]
[[Category: Thunnus thynnus]]
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[[Category: Chong, K T.]]
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[[Category: Chong KT]]
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[[Category: Jeremy, R H.T.]]
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[[Category: Jeremy RHT]]
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[[Category: Miyazaki, G.]]
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[[Category: Miyazaki G]]
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[[Category: Miyazaki, Y.]]
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[[Category: Miyazaki Y]]
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[[Category: Morimoto, H.]]
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[[Category: Morimoto H]]
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[[Category: Nakatsukasa, T.]]
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[[Category: Nakatsukasa T]]
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[[Category: Park, S Y.]]
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[[Category: Park SY]]
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[[Category: Unzai, S.]]
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[[Category: Unzai S]]
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[[Category: Yokoyama, T.]]
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[[Category: Yokoyama T]]
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[[Category: Erythrocyte]]
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[[Category: Heme]]
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[[Category: Oxygen transport]]
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[[Category: Respiratory protein]]
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[[Category: Root effect]]
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[[Category: Swim bladder]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 12:04:58 2008''
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Current revision

Crystal structure of bluefin tuna hemoglobin deoxy form at pH5.0

PDB ID 1v4x

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