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==Structure-activity relationship study of vitamin D analogs with oxolane group in their side chain==
<StructureSection load='5nmb' size='340' side='right'caption='[[5nmb]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5nmb]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Danio_rerio Danio rerio] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NMB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5NMB 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]] 2.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=9CZ:(1~{R},3~{S},5~{Z})-5-[(2~{E})-2-[(1~{R},3~{a}~{S},7~{a}~{R})-7~{a}-methyl-1-[(1~{S})-1-[(2~{S},5~{R})-5-(2-oxidanylpropan-2-yl)oxolan-2-yl]ethyl]-2,3,3~{a},5,6,7-hexahydro-1~{H}-inden-4-ylidene]ethylidene]-4-methylidene-cyclohexane-1,3-diol'>9CZ</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=5nmb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nmb OCA], [https://pdbe.org/5nmb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5nmb RCSB], [https://www.ebi.ac.uk/pdbsum/5nmb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5nmb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/VDRA_DANRE VDRA_DANRE] Nuclear hormone receptor. Transcription factor that mediates the action of vitamin D3 by controlling the expression of hormone sensitive genes. Regulates transcription of hormone sensitive genes via its association with the WINAC complex, a chromatin-remodeling complex. Plays a central role in calcium homeostasis.<ref>PMID:17218092</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Synthetic analogs of 1alpha,25-dihydroxyvitamin D3 (1,25(OH)2D3) have been developed with the goal of improving the biological profile of the natural hormone for therapeutic applications. Derivatives of 1,25(OH)2D3 with the oxolane moiety branched in the side chain at carbon C20, act as Vitamin D nuclear Receptor (VDR) superagonists being several orders of magnitude more active than the natural ligand. Here, we describe the synthesis and biological evaluation of three diastereoisomers of (1S, 3R)-Dihydroxy-(20S)-[(2''-hydroxy-2''-propyl)-tetrahydrofuryl]-22,23,24,25,26,27- hexanor-1alpha-hydroxyvitamin D3, with different stereochemistry at positions C2 and C5 of the oxolane ring branched at carbon C22 (1, C2RC5S; 2, C2SC5R; 3, C2SC5S). These compounds act as weak VDR agonist in transcriptional assays with compound 3 being the most active. X-ray crystallographic analysis of the VDR ligand-binding domain accommodating the three compounds indicates that the oxolane group branched at carbon C22 is not constrained as in case of compound with oxolane group branched at C20 leading to the loss of interactions of the triene group and increased flexibility of the C/D-rings and of the side chain.

Structure-activity relationship study of vitamin D analogs with oxolane group in their side chain.,Belorusova AY, Martinez A, Gandara Z, Gomez G, Fall Y, Rochel N Eur J Med Chem. 2017 Jul 7;134:86-96. doi: 10.1016/j.ejmech.2017.03.081. Epub, 2017 Apr 2. PMID:28399453<ref>PMID:28399453</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5nmb" style="background-color:#fffaf0;"></div>

==See Also==
*[[Vitamin D receptor 3D structures|Vitamin D receptor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Danio rerio]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Belorusova AY]]
[[Category: Rochel N]]