1h6r: Difference between revisions

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[[Image:1h6r.png|left|200px]]


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==The oxidized state of a redox sensitive variant of green fluorescent protein==
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<StructureSection load='1h6r' size='340' side='right'caption='[[1h6r]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1h6r]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H6R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1H6R FirstGlance]. <br>
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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]] 1.5&#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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=PIA:[(4Z)-2-[(1S)-1-AMINOETHYL]-4-(4-HYDROXYBENZYLIDENE)-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL]ACETIC+ACID'>PIA</scene></td></tr>
{{STRUCTURE_1h6r|  PDB=1h6r  |  SCENE=  }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1h6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1h6r OCA], [https://pdbe.org/1h6r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1h6r RCSB], [https://www.ebi.ac.uk/pdbsum/1h6r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1h6r ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GFP_AEQVI GFP_AEQVI] Energy-transfer acceptor. Its role is to transduce the blue chemiluminescence of the protein aequorin into green fluorescent light by energy transfer. Fluoresces in vivo upon receiving energy from the Ca(2+)-activated photoprotein aequorin.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
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    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h6/1h6r_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=1h6r ConSurf].
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== Publication Abstract from PubMed ==
To visualize the formation of disulfide bonds in living cells, a pair of redox-active cysteines was introduced into the yellow fluorescent variant of green fluorescent protein. Formation of a disulfide bond between the two cysteines was fully reversible and resulted in a &gt;2-fold decrease in the intrinsic fluorescence. Inter conversion between the two redox states could thus be followed in vitro as well as in vivo by non-invasive fluorimetric measurements. The 1.5 A crystal structure of the oxidized protein revealed a disulfide bond-induced distortion of the beta-barrel, as well as a structural reorganization of residues in the immediate chromophore environment. By combining this information with spectroscopic data, we propose a detailed mechanism accounting for the observed redox state-dependent fluorescence. The redox potential of the cysteine couple was found to be within the physiological range for redox-active cysteines. In the cytoplasm of Escherichia coli, the protein was a sensitive probe for the redox changes that occur upon disruption of the thioredoxin reductive pathway.


===THE OXIDIZED STATE OF A REDOX SENSITIVE VARIANT OF GREEN FLUORESCENT PROTEIN===
Shedding light on disulfide bond formation: engineering a redox switch in green fluorescent protein.,Ostergaard H, Henriksen A, Hansen FG, Winther JR EMBO J. 2001 Nov 1;20(21):5853-62. PMID:11689426<ref>PMID:11689426</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 1h6r" style="background-color:#fffaf0;"></div>


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==See Also==
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*[[Green Fluorescent Protein 3D structures|Green Fluorescent Protein 3D structures]]
(as it appears on PubMed at http://www.pubmed.gov), where 11689426 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_11689426}}
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</StructureSection>
==About this Structure==
1H6R is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H6R OCA].
 
==Reference==
Shedding light on disulfide bond formation: engineering a redox switch in green fluorescent protein., Ostergaard H, Henriksen A, Hansen FG, Winther JR, EMBO J. 2001 Nov 1;20(21):5853-62. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11689426 11689426]
[[Category: Aequorea victoria]]
[[Category: Aequorea victoria]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Hansen, F G.]]
[[Category: Hansen FG]]
[[Category: Henriksen, A.]]
[[Category: Henriksen A]]
[[Category: Ostergaard, H.]]
[[Category: Ostergaard H]]
[[Category: Winther, J R.]]
[[Category: Winther JR]]
[[Category: Green fluorescent protein]]
[[Category: Luminescence]]
[[Category: Yellow-emission]]
 
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