4cn2

From Proteopedia

(Difference between revisions)

Revision as of 02:38, 11 December 2016

Crystal Structure of the Human Retinoid X Receptor DNA-Binding Domain Bound to the Human Ramp2 Response Element

Structural highlights

4cn2 is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Related:	4cn3, 4cn5, 4cn7
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RXRA_HUMAN] Receptor for retinoic acid. Retinoic acid receptors bind as heterodimers to their target response elements in response to their ligands, all-trans or 9-cis retinoic acid, and regulate gene expression in various biological processes. The RAR/RXR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. The high affinity ligand for RXRs is 9-cis retinoic acid. RXRA serves as a common heterodimeric partner for a number of nuclear receptors. The RXR/RAR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. In the absence of ligand, the RXR-RAR heterodimers associate with a multiprotein complex containing transcription corepressors that induce histone acetylation, chromatin condensation and transcriptional suppression. On ligand binding, the corepressors dissociate from the receptors and associate with the coactivators leading to transcriptional activation. The RXRA/PPARA heterodimer is required for PPARA transcriptional activity on fatty acid oxidation genes such as ACOX1 and the P450 system genes.^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Retinoid X receptors (RXRs) act as homodimers or heterodimerisation partners of class II nuclear receptors. RXR homo- and heterodimers bind direct repeats of the half-site (A/G)G(G/T)TCA separated by 1 nucleotide (DR1). We present a structural characterization of RXR-DNA binding domain (DBD) homodimers on several natural DR1s and an idealized symmetric DR1. Homodimers displayed asymmetric binding, with critical high-affinity interactions accounting for the 3' positioning of RXR in heterodimers on DR1s. Differing half-site and spacer DNA sequence induce changes in RXR-DBD homodimer conformation notably in the dimerization interface such that natural DR1s are bound with higher affinity than an idealized symmetric DR1. Subtle changes in the consensus DR1 DNA sequence therefore specify binding affinity through altered RXR-DBD-DNA contacts and changes in DBD conformation suggesting a general model whereby preferential half-site recognition determines polarity of heterodimer binding to response elements.

Structural basis of natural promoter recognition by the retinoid x nuclear receptor.,Osz J, McEwen AG, Poussin-Courmontagne P, Moutier E, Birck C, Davidson I, Moras D, Rochel N Sci Rep. 2015 Feb 3;5:8216. doi: 10.1038/srep08216. PMID:25645674^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Gorla-Bajszczak A, Juge-Aubry C, Pernin A, Burger AG, Meier CA. Conserved amino acids in the ligand-binding and tau(i) domains of the peroxisome proliferator-activated receptor alpha are necessary for heterodimerization with RXR. Mol Cell Endocrinol. 1999 Jan 25;147(1-2):37-47. PMID:10195690
↑ Harish S, Ashok MS, Khanam T, Rangarajan PN. Serine 27, a human retinoid X receptor alpha residue, phosphorylated by protein kinase A is essential for cyclicAMP-mediated downregulation of RXRalpha function. Biochem Biophys Res Commun. 2000 Dec 29;279(3):853-7. PMID:11162439 doi:10.1006/bbrc.2000.4043
↑ Tsutsumi T, Suzuki T, Shimoike T, Suzuki R, Moriya K, Shintani Y, Fujie H, Matsuura Y, Koike K, Miyamura T. Interaction of hepatitis C virus core protein with retinoid X receptor alpha modulates its transcriptional activity. Hepatology. 2002 Apr;35(4):937-46. PMID:11915042 doi:10.1053/jhep.2002.32470
↑ Santos NC, Kim KH. Activity of retinoic acid receptor-alpha is directly regulated at its protein kinase A sites in response to follicle-stimulating hormone signaling. Endocrinology. 2010 May;151(5):2361-72. doi: 10.1210/en.2009-1338. Epub 2010 Mar , 9. PMID:20215566 doi:10.1210/en.2009-1338
↑ Osz J, McEwen AG, Poussin-Courmontagne P, Moutier E, Birck C, Davidson I, Moras D, Rochel N. Structural basis of natural promoter recognition by the retinoid x nuclear receptor. Sci Rep. 2015 Feb 3;5:8216. doi: 10.1038/srep08216. PMID:25645674 doi:http://dx.doi.org/10.1038/srep08216

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4cn2"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of the Human Retinoid X Receptor DNA-Binding Domain Bound to the Human Ramp2 Response Element==
 <StructureSection load='4cn2' size='340' side='right' caption='[[4cn2]], [[Resolution|resolution]] 2.07&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4cn3|4cn3]], [[4cn5|4cn5]], [[4cn7|4cn7]]</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=4cn2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cn2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4cn2 RCSB], [http://www.ebi.ac.uk/pdbsum/4cn2 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=4cn2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cn2 OCA], [http://pdbe.org/4cn2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4cn2 RCSB], [http://www.ebi.ac.uk/pdbsum/4cn2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4cn2 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4cn2" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Retinoid X receptor|Retinoid X receptor]]
 == References ==
 <references/>

4cn2

From Proteopedia

Revision as of 02:38, 11 December 2016

Crystal Structure of the Human Retinoid X Receptor DNA-Binding Domain Bound to the Human Ramp2 Response Element

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

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