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[[Image:2grf.png|left|200px]]
==Crystal structure of Scapharca inaequivalvis HBI, M37V mutant in the absence of ligand==
<StructureSection load='2grf' size='340' side='right' caption='[[2grf]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2grf]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Scapharca_inaequivalvis Scapharca inaequivalvis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GRF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2GRF FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene><br>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4sdh|4sdh]], [[2grh|2grh]], [[2grz|2grz]]</td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2grf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2grf OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2grf RCSB], [http://www.ebi.ac.uk/pdbsum/2grf PDBsum]</span></td></tr>
<table>
== 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/gr/2grf_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Protein allostery provides mechanisms for regulation of biological function at the molecular level. We present here an investigation of global, ligand-induced allosteric transition in a protein by time-resolved x-ray diffraction. The study provides a view of structural changes in single crystals of Scapharca dimeric hemoglobin as they proceed in real time, from 5 ns to 80 micros after ligand photodissociation. A tertiary intermediate structure forms rapidly (&lt;5 ns) as the protein responds to the presence of an unliganded heme within each R-state protein subunit, with key structural changes observed in the heme groups, neighboring residues, and interface water molecules. This intermediate lays a foundation for the concerted tertiary and quaternary structural changes that occur on a microsecond time scale and are associated with the transition to a low-affinity T-state structure. Reversal of these changes shows a considerable lag as a T-like structure persists well after ligand rebinding, suggesting a slow T-to-R transition.


{{STRUCTURE_2grf|  PDB=2grf  |  SCENE=  }}
Allosteric action in real time: time-resolved crystallographic studies of a cooperative dimeric hemoglobin.,Knapp JE, Pahl R, Srajer V, Royer WE Jr Proc Natl Acad Sci U S A. 2006 May 16;103(20):7649-54. Epub 2006 May 9. PMID:16684887<ref>PMID:16684887</ref>


===Crystal structure of Scapharca inaequivalvis HBI, M37V mutant in the absence of ligand===
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
{{ABSTRACT_PUBMED_16684887}}
 
==About this Structure==
[[2grf]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Scapharca_inaequivalvis Scapharca inaequivalvis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GRF OCA].


==See Also==
==See Also==
*[[Hemoglobin|Hemoglobin]]
*[[Hemoglobin 3D structures|Hemoglobin 3D structures]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:016684887</ref><references group="xtra"/>
__TOC__
</StructureSection>
[[Category: Scapharca inaequivalvis]]
[[Category: Scapharca inaequivalvis]]
[[Category: Knapp, J E.]]
[[Category: Knapp, J E.]]
Retrieved from "https://proteopedia.org/2grf"