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[[Image:1myt.gif|left|200px]]


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==CRYSTAL STRUCTURE TO 1.74 ANGSTROMS RESOLUTION OF METMYOGLOBIN FROM YELLOWFIN TUNA (THUNNUS ALBACARES): AN EXAMPLE OF A MYOGLOBIN LACKING THE D HELIX==
The line below this paragraph, containing "STRUCTURE_1myt", creates the "Structure Box" on the page.
<StructureSection load='1myt' size='340' side='right'caption='[[1myt]], [[Resolution|resolution]] 1.74&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1myt]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thunnus_albacares Thunnus albacares]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MYT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MYT FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.74&#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=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
{{STRUCTURE_1myt|  PDB=1myt |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1myt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1myt OCA], [https://pdbe.org/1myt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1myt RCSB], [https://www.ebi.ac.uk/pdbsum/1myt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1myt ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MYG_THUAL MYG_THUAL] Serves as a reserve supply of oxygen and facilitates the movement of oxygen within muscles.
== 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/my/1myt_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1myt ConSurf].
<div style="clear:both"></div>


'''CRYSTAL STRUCTURE TO 1.74 ANGSTROMS RESOLUTION OF METMYOGLOBIN FROM YELLOWFIN TUNA (THUNNUS ALBACARES): AN EXAMPLE OF A MYOGLOBIN LACKING THE D HELIX'''
==See Also==
 
*[[Myoglobin 3D structures|Myoglobin 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
The crystal structure of metmyoglobin from yellowfin tuna (Thunnus albacares) has been determined by molecular replacement methods and refined to a conventional R factor of 0.177 for all observed reflections in the range of 6.0-1.70 A resolution. Like other myoglobins for which a high-resolution structure is available, the polypeptide chain is organized into several helices that cooperate to form a hydrophobic pocket into which the heme prosthetic group is non-covalently bound; however, the D helix observed in other myoglobins is absent in myoglobin from yellowfin tuna and has been replaced with a random coil. As well, the A helix has a pronounced kink due to the presence of Pro16. The differences in structure between this and sperm whale myoglobin can be correlated with their reported dioxygen affinity and dissociation. The structure is in agreement with reported fluorescence data which show an increased Trp14.heme distance in yellowfin tuna compared to sperm whale myoglobin.
[[Category: Large Structures]]
 
==About this Structure==
1MYT is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thunnus_albacares Thunnus albacares]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MYT OCA].
 
==Reference==
1.70 A resolution structure of myoglobin from yellowfin tuna. An example of a myoglobin lacking the D helix., Birnbaum GI, Evans SV, Przybylska M, Rose DR, Acta Crystallogr D Biol Crystallogr. 1994 May 1;50(Pt 3):283-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15299440 15299440]
[[Category: Single protein]]
[[Category: Thunnus albacares]]
[[Category: Thunnus albacares]]
[[Category: Birnbaum, G I.]]
[[Category: Birnbaum GI]]
[[Category: Evans, S V.]]
[[Category: Evans SV]]
[[Category: Przybylska, M.]]
[[Category: Przybylska M]]
[[Category: Rose, D R.]]
[[Category: Rose DR]]
[[Category: Oxygen transport]]
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