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==Crystal structure of red fluorescent protein eqFP578 crystallized at pH 4.0==
==Crystal structure of red fluorescent protein eqFP578 crystallized at pH 4.0==
<StructureSection load='3pjb' size='340' side='right' caption='[[3pjb]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
<StructureSection load='3pjb' size='340' side='right'caption='[[3pjb]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3pjb]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bubble-tip_anemone Bubble-tip anemone]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PJB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3PJB FirstGlance]. <br>
<table><tr><td colspan='2'>[[3pjb]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Entacmaea_quadricolor Entacmaea quadricolor]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PJB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PJB FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.75&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=NRQ:{(4Z)-4-(4-HYDROXYBENZYLIDENE)-2-[3-(METHYLTHIO)PROPANIMIDOYL]-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>NRQ</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NRQ:{(4Z)-4-(4-HYDROXYBENZYLIDENE)-2-[3-(METHYLTHIO)PROPANIMIDOYL]-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>NRQ</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3bx9|3bx9]], [[3bxa|3bxa]], [[3bxb|3bxb]], [[3bxc|3bxc]], [[3pib|3pib]], [[3pj5|3pj5]], [[3pj7|3pj7]]</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3pjb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pjb OCA], [https://pdbe.org/3pjb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pjb RCSB], [https://www.ebi.ac.uk/pdbsum/3pjb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pjb ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3pjb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pjb OCA], [http://pdbe.org/3pjb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3pjb RCSB], [http://www.ebi.ac.uk/pdbsum/3pjb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3pjb ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Function ==
== Publication Abstract from PubMed ==
[https://www.uniprot.org/uniprot/H3JQU7_ENTQU H3JQU7_ENTQU]
The wild type red fluorescent protein eqFP578 (from sea anemone Entacmaea quadricolor, lambdaex = 552 nm, lambdaem = 578 nm) and its bright far-red fluorescent variant Katushka (lambdaex = 588 nm, lambdaem = 635 nm) are characterized by the pronounced pH dependence of their fluorescence. The crystal structures of eqFP578f (eqFP578 with two point mutations improving the protein folding) and Katushka have been determined at the resolution ranging from 1.15 to 1.85 A at two pH values, corresponding to low and high level of fluorescence. The observed extinguishing of fluorescence upon reducing pH in eqFP578f and Katushka has been shown to be accompanied by the opposite trans-cis and cis-trans chromophore isomerization, respectively. Asn143, Ser158, His197 and Ser143, Leu174, and Arg197 have been shown to stabilize the respective trans and cis fluorescent states of the chromophores in eqFP578f and Katushka at higher pH. The cis state has been suggested as being primarily responsible for the observed far-red shift of the emission maximum of Katushka relative to that of eqFP578f.
 
Crystallographic study of red fluorescent protein eqFP578 and its far-red variant Katushka reveals opposite pH-induced isomerization of chromophore.,Pletneva NV, Pletnev VZ, Shemiakina II, Chudakov DM, Artemyev I, Wlodawer A, Dauter Z, Pletnev S Protein Sci. 2011 May 11. doi: 10.1002/pro.654. PMID:21563226<ref>PMID:21563226</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3pjb" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Green Fluorescent Protein|Green Fluorescent Protein]]
*[[Green Fluorescent Protein 3D structures|Green Fluorescent Protein 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Bubble-tip anemone]]
[[Category: Entacmaea quadricolor]]
[[Category: Pletnev, S]]
[[Category: Large Structures]]
[[Category: Pletnev, V Z]]
[[Category: Pletnev S]]
[[Category: Pletneva, N V]]
[[Category: Pletnev VZ]]
[[Category: Beta-barrel]]
[[Category: Pletneva NV]]
[[Category: Biomarker]]
[[Category: Eqfp578]]
[[Category: Fluorescent protein]]
[[Category: Met-tyr-gly chromophore]]
[[Category: Red fluorescent protein]]

Latest revision as of 16:32, 1 March 2024

Crystal structure of red fluorescent protein eqFP578 crystallized at pH 4.0Crystal structure of red fluorescent protein eqFP578 crystallized at pH 4.0

Structural highlights

3pjb is a 2 chain structure with sequence from Entacmaea quadricolor. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.75Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

H3JQU7_ENTQU

See Also

3pjb, resolution 1.75Å

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