View source for 5h89


==Crystal structure of mRojoA mutant - T16V - P63Y - W143G - L163V==
<StructureSection load='5h89' size='340' side='right'caption='[[5h89]], [[Resolution|resolution]] 1.76&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5h89]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Discosoma_sp. Discosoma sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5H89 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5H89 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.76&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CH6:{(4Z)-2-[(1S)-1-AMINO-3-(METHYLSULFANYL)PROPYL]-4-[(4-HYDROXYPHENYL)METHYLIDENE]-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>CH6</scene></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=5h89 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5h89 OCA], [https://pdbe.org/5h89 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5h89 RCSB], [https://www.ebi.ac.uk/pdbsum/5h89 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5h89 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/D1MPT3_DISSP D1MPT3_DISSP] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Red fluorescent proteins (RFPs) are used extensively in chemical biology research as fluorophores for live cell imaging, as partners in FRET pairs, and as signal transducers in biosensors. For all of these applications, brighter RFP variants are desired. Here, we used rational design to increase the quantum yield of monomeric RFPs in order to improve their brightness. We postulated that we could increase quantum yield by restricting the conformational degrees of freedom of the RFP chromophore. To test our hypothesis, we introduced aromatic residues above the chromophore of mRojoA, a dim RFP containing a pi-stacked Tyr residue directly beneath the chromophore, in order to reduce chromophore conformational flexibility via improved packing and steric complementarity. The best mutant identified displayed an absolute quantum yield increase of 0.07, representing an over 3-fold improvement relative to mRojoA. Remarkably, this variant was isolated following the screening of only 48 mutants, a library size that is several orders of magnitude smaller than those previously used to achieve equivalent gains in quantum yield in other RFPs. The crystal structure of the highest quantum yield mutant showed that the chromophore is sandwiched between two Tyr residues in a triple-decker motif of aromatic rings. Presence of this motif increases chromophore rigidity, as evidenced by the significantly reduced temperature factors compared to dim RFPs. Overall, the approach presented here paves the way for the rapid development of fluorescent proteins with higher quantum yield and overall brightness.

Brighter Red Fluorescent Proteins by Rational Design of Triple-Decker Motif.,Pandelieva AT, Baran MJ, Calderini GF, McCann JL, Tremblay V, Sarvan S, Davey JA, Couture JF, Chica RA ACS Chem Biol. 2016 Jan 5. PMID:26697759<ref>PMID:26697759</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5h89" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Discosoma sp]]
[[Category: Large Structures]]
[[Category: Chica RA]]
[[Category: Couture J-F]]
[[Category: Pandelieva AT]]
[[Category: Sarvan S]]
[[Category: Tremblay V]]