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==Crystal structure of the high affinity heterodimer of HIF2 alpha and ARNT C-terminal PAS domains, with an internally-bound artificial ligand==
==Crystal structure of the high affinity heterodimer of HIF2 alpha and ARNT C-terminal PAS domains, with an internally-bound artificial ligand==
<StructureSection load='3f1o' size='340' side='right' caption='[[3f1o]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
<StructureSection load='3f1o' size='340' side='right'caption='[[3f1o]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3f1o]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3F1O OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3F1O FirstGlance]. <br>
<table><tr><td colspan='2'>[[3f1o]] is a 2 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=3F1O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3F1O FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=2XY:N-[2-NITRO-4-(TRIFLUOROMETHYL)PHENYL]MORPHOLIN-4-AMINE'>2XY</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.598&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1x0o|1x0o]], [[1p97|1p97]], [[2b02|2b02]], [[2a24|2a24]], [[3f1n|3f1n]], [[3f1p|3f1p]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=2XY:N-[2-NITRO-4-(TRIFLUOROMETHYL)PHENYL]MORPHOLIN-4-AMINE'>2XY</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">EPAS1, HIF2A, Hypoxia Inducible Factor 2 alpha, MOP2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), ARNT, Aryl Hydrocarbon Receptor Nuclear Translocator ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=3f1o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3f1o OCA], [https://pdbe.org/3f1o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3f1o RCSB], [https://www.ebi.ac.uk/pdbsum/3f1o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3f1o ProSAT]</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=3f1o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3f1o OCA], [http://pdbe.org/3f1o PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3f1o RCSB], [http://www.ebi.ac.uk/pdbsum/3f1o PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3f1o ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
== Disease ==
[[http://www.uniprot.org/uniprot/EPAS1_HUMAN EPAS1_HUMAN]] Defects in EPAS1 are the cause of familial erythrocytosis type 4 (ECYT4) [MIM:[http://omim.org/entry/611783 611783]]. ECYT4 is an autosomal dominant disorder characterized by increased serum red blood cell mass, elevated hemoglobin concentration and hematocrit, and normal platelet and leukocyte counts.<ref>PMID:19208626</ref> <ref>PMID:18378852</ref> <ref>PMID:18184961</ref> <ref>PMID:22367913</ref>
[https://www.uniprot.org/uniprot/EPAS1_HUMAN EPAS1_HUMAN] Defects in EPAS1 are the cause of familial erythrocytosis type 4 (ECYT4) [MIM:[https://omim.org/entry/611783 611783]. ECYT4 is an autosomal dominant disorder characterized by increased serum red blood cell mass, elevated hemoglobin concentration and hematocrit, and normal platelet and leukocyte counts.<ref>PMID:19208626</ref> <ref>PMID:18378852</ref> <ref>PMID:18184961</ref> <ref>PMID:22367913</ref>  
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/EPAS1_HUMAN EPAS1_HUMAN]] Transcription factor involved in the induction of oxygen regulated genes. Binds to core DNA sequence 5'-[AG]CGTG-3' within the hypoxia response element (HRE) of target gene promoters. Regulates the vascular endothelial growth factor (VEGF) expression and seems to be implicated in the development of blood vessels and the tubular system of lung. May also play a role in the formation of the endothelium that gives rise to the blood brain barrier. Potent activator of the Tie-2 tyrosine kinase expression. Activation seems to require recruitment of transcriptional coactivators such as CREBPB and probably EP300. Interaction with redox regulatory protein APEX seems to activate CTAD. [[http://www.uniprot.org/uniprot/ARNT_HUMAN ARNT_HUMAN]] Required for activity of the Ah (dioxin) receptor. This protein is required for the ligand-binding subunit to translocate from the cytosol to the nucleus after ligand binding. The complex then initiates transcription of genes involved in the activation of PAH procarcinogens. The heterodimer with HIF1A or EPAS1/HIF2A functions as a transcriptional regulator of the adaptive response to hypoxia.  
[https://www.uniprot.org/uniprot/EPAS1_HUMAN EPAS1_HUMAN] Transcription factor involved in the induction of oxygen regulated genes. Binds to core DNA sequence 5'-[AG]CGTG-3' within the hypoxia response element (HRE) of target gene promoters. Regulates the vascular endothelial growth factor (VEGF) expression and seems to be implicated in the development of blood vessels and the tubular system of lung. May also play a role in the formation of the endothelium that gives rise to the blood brain barrier. Potent activator of the Tie-2 tyrosine kinase expression. Activation seems to require recruitment of transcriptional coactivators such as CREBPB and probably EP300. Interaction with redox regulatory protein APEX seems to activate CTAD.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/f1/3f1o_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/f1/3f1o_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
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</div>
</div>
<div class="pdbe-citations 3f1o" style="background-color:#fffaf0;"></div>
<div class="pdbe-citations 3f1o" style="background-color:#fffaf0;"></div>
==See Also==
*[[Factor inhibiting HIF|Factor inhibiting HIF]]
*[[3D structures of hypoxia-inducible factor|3D structures of hypoxia-inducible factor]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Human]]
[[Category: Homo sapiens]]
[[Category: Bruick, R K]]
[[Category: Large Structures]]
[[Category: Gardner, K H]]
[[Category: Bruick RK]]
[[Category: Guo, Y]]
[[Category: Gardner KH]]
[[Category: Machius, M]]
[[Category: Guo Y]]
[[Category: Scheuermann, T H]]
[[Category: Machius M]]
[[Category: Tomchick, D R]]
[[Category: Scheuermann TH]]
[[Category: Activator]]
[[Category: Tomchick DR]]
[[Category: Alternative splicing]]
[[Category: Angiogenesis]]
[[Category: Congenital erythrocytosis]]
[[Category: Developmental protein]]
[[Category: Differentiation]]
[[Category: Disease mutation]]
[[Category: Dna-binding]]
[[Category: Heterodimer]]
[[Category: Hydroxylation]]
[[Category: Internal cavity]]
[[Category: Nucleus]]
[[Category: Pas domain]]
[[Category: Phosphoprotein]]
[[Category: Polymorphism]]
[[Category: Transcription]]
[[Category: Transcription regulation]]
[[Category: Ubl conjugation]]

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