View source for 6wnj


==The Crystal Structure of Apo Domain-Swapped Trimer Q108K:T51D:A28C:I32C of HCRBPII==
<StructureSection load='6wnj' size='340' side='right'caption='[[6wnj]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6wnj]] is a 3 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=6WNJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6WNJ 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]] 2.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=144:TRIS-HYDROXYMETHYL-METHYL-AMMONIUM'>144</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=6wnj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wnj OCA], [https://pdbe.org/6wnj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6wnj RCSB], [https://www.ebi.ac.uk/pdbsum/6wnj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6wnj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RET2_HUMAN RET2_HUMAN] Intracellular transport of retinol.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Domain-swapping is a mechanism for evolving new protein structure from extant scaffolds, and has been an efficient protein-engineering strategy for tailoring functional diversity. However, domain swapping can only be exploited if it can be controlled, especially in cases where various folds can coexist. Herein, we describe the structure of a domain-swapped trimer of the iLBP family member hCRBPII, and suggest a mechanism for domain-swapped trimerization. It is further shown that domain-swapped trimerization can be favored by strategic installation of a disulfide bond, thus demonstrating a strategy for fold control. We further show the domain-swapped trimer to be a useful protein design template by installing a high-affinity metal binding site through the introduction of a single mutation, taking advantage of its threefold symmetry. Together, these studies show how nature can promote oligomerization, stabilize a specific oligomer, and generate new function with minimal changes to the protein sequence.

Human Cellular Retinol Binding Protein II Forms a Domain-Swapped Trimer Representing a Novel Fold and a New Template for Protein Engineering.,Ghanbarpour A, Santos EM, Pinger C, Assar Z, Hossaini Nasr S, Vasileiou C, Spence D, Borhan B, Geiger JH Chembiochem. 2020 Jun 30. doi: 10.1002/cbic.202000405. PMID:32608180<ref>PMID:32608180</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6wnj" style="background-color:#fffaf0;"></div>

==See Also==
*[[Retinol-binding protein 3D structures|Retinol-binding protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Geiger J]]
[[Category: Ghanbarpour A]]