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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=RET:RETINAL'>RET</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4zh9|4zh9]], [[4zh6|4zh6]], [[4qzt|4qzt]], [[4qzu|4qzu]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4zh9|4zh9]], [[4zh6|4zh6]], [[4qzt|4qzt]], [[4qzu|4qzu]]</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=4zr2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4zr2 OCA], [http://pdbe.org/4zr2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4zr2 RCSB], [http://www.ebi.ac.uk/pdbsum/4zr2 PDBsum]</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=4zr2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4zr2 OCA], [http://pdbe.org/4zr2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4zr2 RCSB], [http://www.ebi.ac.uk/pdbsum/4zr2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4zr2 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| Line 12: | Line 12: | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
Cellular | Human Cellular Retinol Binding Protein II (hCRBPII), a member of the intracellular lipid-binding protein family, is a monomeric protein responsible for the intracellular transport of retinol and retinal. Herein we report that hCRBPII forms an extensive domain-swapped dimer during bacterial expression. The domain-swapped region encompasses almost half of the protein. The dimer represents a novel structural architecture with the mouths of the two binding cavities facing each other, producing a new binding cavity that spans the length of the protein complex. Although wild-type hCRBPII forms the dimer, the propensity for dimerization can be substantially increased via mutation at Tyr60. The monomeric form of the wild-type protein represents the thermodynamically more stable species, making the domain-swapped dimer a kinetically trapped entity. Hypothetically, the wild-type protein has evolved to minimize dimerization of the folding intermediate through a critical hydrogen bond (Tyr60-Glu72) that disfavors the dimeric form. | ||
Domain-Swapped Dimers of Intracellular Lipid-Binding Proteins: Evidence for Ordered Folding Intermediates.,Assar Z, Nossoni Z, Wang W, Santos EM, Kramer K, McCornack C, Vasileiou C, Borhan B, Geiger JH Structure. 2016 Sep 6;24(9):1590-8. doi: 10.1016/j.str.2016.05.022. Epub 2016 Aug, 11. PMID:27524203<ref>PMID:27524203</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 4zr2" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 4zr2" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Retinol-binding protein|Retinol-binding protein]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 06:50, 6 September 2017
Crystal Structure of the Domain-Swapped Dimer K40L:Q108K:Y60W mutant of Human Cellular Retinol Binding Protein IICrystal Structure of the Domain-Swapped Dimer K40L:Q108K:Y60W mutant of Human Cellular Retinol Binding Protein II
Structural highlights
Function[RET2_HUMAN] Intracellular transport of retinol. Publication Abstract from PubMedHuman Cellular Retinol Binding Protein II (hCRBPII), a member of the intracellular lipid-binding protein family, is a monomeric protein responsible for the intracellular transport of retinol and retinal. Herein we report that hCRBPII forms an extensive domain-swapped dimer during bacterial expression. The domain-swapped region encompasses almost half of the protein. The dimer represents a novel structural architecture with the mouths of the two binding cavities facing each other, producing a new binding cavity that spans the length of the protein complex. Although wild-type hCRBPII forms the dimer, the propensity for dimerization can be substantially increased via mutation at Tyr60. The monomeric form of the wild-type protein represents the thermodynamically more stable species, making the domain-swapped dimer a kinetically trapped entity. Hypothetically, the wild-type protein has evolved to minimize dimerization of the folding intermediate through a critical hydrogen bond (Tyr60-Glu72) that disfavors the dimeric form. Domain-Swapped Dimers of Intracellular Lipid-Binding Proteins: Evidence for Ordered Folding Intermediates.,Assar Z, Nossoni Z, Wang W, Santos EM, Kramer K, McCornack C, Vasileiou C, Borhan B, Geiger JH Structure. 2016 Sep 6;24(9):1590-8. doi: 10.1016/j.str.2016.05.022. Epub 2016 Aug, 11. PMID:27524203[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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