4ple: Difference between revisions

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-'''Unreleased structure'''
+==Human Nuclear Receptor Liver Receptor Homologue-1, LRH-1, Bound to an E. Coli Phospholipid and a Fragment of TIF-2==
+<StructureSection load='4ple' size='340' side='right' caption='[[4ple]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[4ple]] is a 8 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PLE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4PLE FirstGlance]. <br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CPS:3-[(3-CHOLAMIDOPROPYL)DIMETHYLAMMONIO]-1-PROPANESULFONATE'>CPS</scene>, <scene name='pdbligand=EPH:L-ALPHA-PHOSPHATIDYL-BETA-OLEOYL-GAMMA-PALMITOYL-PHOSPHATIDYLETHANOLAMINE'>EPH</scene></td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4pld|4pld]]</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=4ple FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ple OCA], [http://pdbe.org/4ple PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ple RCSB], [http://www.ebi.ac.uk/pdbsum/4ple PDBsum]</span></td></tr>
+</table>
+== Disease ==
+[[http://www.uniprot.org/uniprot/NCOA2_HUMAN NCOA2_HUMAN]] Note=Chromosomal aberrations involving NCOA2 may be a cause of acute myeloid leukemias. Inversion inv(8)(p11;q13) generates the KAT6A-NCOA2 oncogene, which consists of the N-terminal part of KAT6A and the C-terminal part of NCOA2/TIF2. KAT6A-NCOA2 binds to CREBBP and disrupts its function in transcription activation.
+== Function ==
+[[http://www.uniprot.org/uniprot/NR5A2_HUMAN NR5A2_HUMAN]] Binds to the sequence element 5'-AACGACCGACCTTGAG-3' of the enhancer II of hepatitis B virus genes, a critical cis-element of their expression and regulation. May be responsible for the liver-specific activity of enhancer II, probably in combination with other hepatocyte transcription factors. Key regulator of cholesterol 7-alpha-hydroxylase gene (CYP7A) expression in liver. May also contribute to the regulation of pancreas-specific genes and play important roles in embryonic development. [[http://www.uniprot.org/uniprot/NCOA2_HUMAN NCOA2_HUMAN]] Transcriptional coactivator for steroid receptors and nuclear receptors. Coactivator of the steroid binding domain (AF-2) but not of the modulating N-terminal domain (AF-1). Required with NCOA1 to control energy balance between white and brown adipose tissues.<ref>PMID:9430642</ref>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Phospholipids (PLs) are unusual signaling hormones sensed by the nuclear receptor liver receptor homolog 1 (LRH 1), which has evolved a novel allosteric pathway to support appropriate interaction with coregulators depending on ligand status. LRH-1 plays an important role in controlling lipid and cholesterol homeostasis and is a potential target for the treatment of metabolic and neoplastic diseases. While the prospect of modulating LRH-1 via small molecules is exciting, the molecular mechanism linking PL structure to transcriptional coregulator preference is unknown. Previous studies showed that binding to an activating PL ligand, such as dilauroylphosphatidylcholine (DLPC), favors LRH-1s interaction with transcriptional coactivators to upregulate gene expression. Both crystallographic and solution based structural studies showed that DLPC binding drives unanticipated structural fluctuations outside of the canonical activation surface in an alternate activation function (AF) region, encompassing the beta-sheet-H6 region of the protein. However, the mechanism by which dynamics in the alternate AF influences coregulator selectivity remains elusive. Here we pair x-ray crystallography with molecular modeling to identify an unexpected allosteric network that traverses the protein ligand binding pocket and links these two elements to dictate selectivity. We show that communication between the alternate AF region and classical AF2 dictates the strength of the coregulator interaction. This work offers the first glimpse into the conformational dynamics that drive this unusual PL-mediated nuclear hormone receptor activation.
-The entry 4ple is ON HOLD
+Unexpected Allosteric Network Contributes to LRH-1 Coregulator Selectivity.,Musille PM, Kossmann BR, Kohn JA, Ivanov I, Ortlund EA J Biol Chem. 2015 Nov 9. pii: jbc.M115.662874. PMID:26553876<ref>PMID:26553876</ref>
-Authors: Ortlund, E., Musille, P.
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
+</div>
-Description:
+<div class="pdbe-citations 4ple" style="background-color:#fffaf0;"></div>
-[[Category: Unreleased Structures]]
+== References ==
-[[Category: Musille, P]]
+<references/>
-[[Category: Ortlund, E]]
+__TOC__
+</StructureSection>
+[[Category: Musille, P M]]
+[[Category: Ortlund, E A]]
+[[Category: Nuclear receptor]]
+[[Category: Phospholipid]]
+[[Category: Transcription]]