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==Crystal Structure of the R132K:Y134F Mutant of Cellular Retinoic Acid Binding Protein Type II in Complex with All-Trans-Retinal at 1.69 Angstroms Resolution==
==Crystal Structure of the R132K:Y134F Mutant of Cellular Retinoic Acid Binding Protein Type II in Complex with All-Trans-Retinal at 1.69 Angstroms Resolution==
<StructureSection load='2g79' size='340' side='right' caption='[[2g79]], [[Resolution|resolution]] 1.69&Aring;' scene=''>
<StructureSection load='2g79' size='340' side='right'caption='[[2g79]], [[Resolution|resolution]] 1.69&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2g79]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2G79 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2G79 FirstGlance]. <br>
<table><tr><td colspan='2'>[[2g79]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2G79 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2G79 FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><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]] 1.69&#8491;</td></tr>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2g78|2g78]], [[2g7a|2g7a]], [[2g7b|2g7b]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CRABP2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</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=2g79 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2g79 OCA], [https://pdbe.org/2g79 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2g79 RCSB], [https://www.ebi.ac.uk/pdbsum/2g79 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2g79 ProSAT]</span></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=2g79 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2g79 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2g79 RCSB], [http://www.ebi.ac.uk/pdbsum/2g79 PDBsum]</span></td></tr>
</table>
<table>
== Function ==
[https://www.uniprot.org/uniprot/RABP2_HUMAN RABP2_HUMAN] Transports retinoic acid to the nucleus. Regulates the access of retinoic acid to the nuclear retinoic acid receptors.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/g7/2g79_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/g7/2g79_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
   </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].
</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=2g79 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Rational redesign of the binding pocket of Cellular Retinoic Acid Binding Protein II (CRABPII) has provided a mutant that can bind retinal as a protonated Schiff base, mimicking the binding observed in rhodopsin. The reengineering was accomplished through a series of choreographed manipulations to ultimately orient the reactive species (the epsilon-amino group of Lys132 and the carbonyl of retinal) in the proper geometry for imine formation. The guiding principle was to achieve the appropriate Burgi-Dunitz trajectory for the reaction to ensue. Through crystallographic analysis of protein mutants incapable of forming the requisite Schiff base, a highly ordered water molecule was identified as a key culprit in orienting retinal in a nonconstructive manner. Removal of the ordered water, along with placing reinforcing mutations to favor the desired orientation of retinal, led to a triple mutant CRABPII protein capable of nanomolar binding of retinal as a protonated Schiff base. The high-resolution crystal structure of all-trans-retinal bound to the CRABPII triple mutant (1.2 A resolution) unequivocally illustrates the imine formed between retinal and the protein.
Protein design: reengineering cellular retinoic acid binding protein II into a rhodopsin protein mimic.,Vasileiou C, Vaezeslami S, Crist RM, Rabago-Smith M, Geiger JH, Borhan B J Am Chem Soc. 2007 May 16;129(19):6140-8. Epub 2007 Apr 21. PMID:17447762<ref>PMID:17447762</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>


==See Also==
==See Also==
*[[CRABP I ( Cellular Retinoic Acid Binding Protein )|CRABP I ( Cellular Retinoic Acid Binding Protein )]]
*[[CRABP I ( Cellular Retinoic Acid Binding Protein )|CRABP I ( Cellular Retinoic Acid Binding Protein )]]
*[[Cellular retinoic acid-binding protein|Cellular retinoic acid-binding protein]]
*[[Cellular retinoic acid-binding protein 3D structures|Cellular retinoic acid-binding protein 3D structures]]
*[[Gustavo Elberto Epalza Sanchez/Sandbox 1|Gustavo Elberto Epalza Sanchez/Sandbox 1]]
*[[Gustavo Elberto Epalza Sanchez/Sandbox 1|Gustavo Elberto Epalza Sanchez/Sandbox 1]]
*[[Molecular Playground/CRABP I (Cellular Retinoic Acid Binding Protein)|Molecular Playground/CRABP I (Cellular Retinoic Acid Binding Protein)]]
*[[Molecular Playground/CRABP I (Cellular Retinoic Acid Binding Protein)|Molecular Playground/CRABP I (Cellular Retinoic Acid Binding Protein)]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Geiger, J H.]]
[[Category: Large Structures]]
[[Category: Vaezeslami, S.]]
[[Category: Geiger JH]]
[[Category: Beta barrel]]
[[Category: Vaezeslami S]]
[[Category: Crabpii]]
[[Category: High resolution]]
[[Category: Retinal]]
[[Category: Retinoic acid]]
[[Category: Retinoid]]
[[Category: Transport protein]]

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