4iqr

From Proteopedia

(Difference between revisions)

Revision as of 09:54, 4 August 2016

Multi-Domain Organization of the HNF4alpha Nuclear Receptor Complex on DNA

Structural highlights

4iqr is a 12 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	HNF4A, HNF4, NR2A1, TCF14 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[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. [HNF4A_HUMAN] Defects in HNF4A are the cause of maturity-onset diabetes of the young type 1 (MODY1) [MIM:125850]; also symbolized MODY-1. MODY is a form of diabetes that is characterized by an autosomal dominant mode of inheritance, onset in childhood or early adulthood (usually before 25 years of age), a primary defect in insulin secretion and frequent insulin-independence at the beginning of the disease.^[1] ^[2] ^[3]

Function

[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.^[4] [HNF4A_HUMAN] Transcriptionally controlled transcription factor. Binds to DNA sites required for the transcription of alpha 1-antitrypsin, apolipoprotein CIII, transthyretin genes and HNF1-alpha. May be essential for development of the liver, kidney and intestine.

Publication Abstract from PubMed

The hepatocyte nuclear factor 4alpha (HNF-4alpha; also known as NR2A1) is a member of the nuclear receptor (NR) family of transcription factors, which have conserved DNA-binding domains and ligand-binding domains. HNF-4alpha is the most abundant DNA-binding protein in the liver, where some 40% of the actively transcribed genes have a HNF-4alpha response element. These regulated genes are largely involved in the hepatic gluconeogenic program and lipid metabolism. In the pancreas HNF-4alpha is also a master regulator, controlling an estimated 11% of islet genes. HNF-4alpha protein mutations are linked to maturity-onset diabetes of the young, type 1 (MODY1) and hyperinsulinaemic hypoglycaemia. Previous structural analyses of NRs, although productive in elucidating the structure of individual domains, have lagged behind in revealing the connectivity patterns of NR domains. Here we describe the 2.9 A crystal structure of the multidomain human HNF-4alpha homodimer bound to its DNA response element and coactivator-derived peptides. A convergence zone connects multiple receptor domains in an asymmetric fashion, joining distinct elements from each monomer. An arginine target of PRMT1 methylation protrudes directly into this convergence zone and sustains its integrity. A serine target of protein kinase C is also responsible for maintaining domain-domain interactions. These post-translational modifications lead to changes in DNA binding by communicating through the tightly connected surfaces of the quaternary fold. We find that some MODY1 mutations, positioned on the ligand-binding domain and hinge regions of the receptor, compromise DNA binding at a distance by communicating through the interjunctional surfaces of the complex. The overall domain representation of the HNF-4alpha homodimer is different from that of the PPAR-gamma-RXR-alpha heterodimer, even when both NR complexes are assembled on the same DNA element. Our findings suggest that unique quaternary folds and interdomain connections in NRs could be exploited by small-molecule allosteric modulators that affect distal functions in these polypeptides.

Multidomain integration in the structure of the HNF-4alpha nuclear receptor complex.,Chandra V, Huang P, Potluri N, Wu D, Kim Y, Rastinejad F Nature. 2013 Mar 21;495(7441):394-8. doi: 10.1038/nature11966. Epub 2013 Mar 13. PMID:23485969^[5]

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

References

↑ Furuta H, Iwasaki N, Oda N, Hinokio Y, Horikawa Y, Yamagata K, Yano N, Sugahiro J, Ogata M, Ohgawara H, Omori Y, Iwamoto Y, Bell GI. Organization and partial sequence of the hepatocyte nuclear factor-4 alpha/MODY1 gene and identification of a missense mutation, R127W, in a Japanese family with MODY. Diabetes. 1997 Oct;46(10):1652-7. PMID:9313765
↑ Bulman MP, Dronsfield MJ, Frayling T, Appleton M, Bain SC, Ellard S, Hattersley AT. A missense mutation in the hepatocyte nuclear factor 4 alpha gene in a UK pedigree with maturity-onset diabetes of the young. Diabetologia. 1997 Jul;40(7):859-62. PMID:9243109
↑ Hani EH, Suaud L, Boutin P, Chevre JC, Durand E, Philippi A, Demenais F, Vionnet N, Furuta H, Velho G, Bell GI, Laine B, Froguel P. A missense mutation in hepatocyte nuclear factor-4 alpha, resulting in a reduced transactivation activity, in human late-onset non-insulin-dependent diabetes mellitus. J Clin Invest. 1998 Feb 1;101(3):521-6. PMID:9449683 doi:10.1172/JCI1403
↑ Voegel JJ, Heine MJ, Tini M, Vivat V, Chambon P, Gronemeyer H. The coactivator TIF2 contains three nuclear receptor-binding motifs and mediates transactivation through CBP binding-dependent and -independent pathways. EMBO J. 1998 Jan 15;17(2):507-19. PMID:9430642 doi:10.1093/emboj/17.2.507
↑ Chandra V, Huang P, Potluri N, Wu D, Kim Y, Rastinejad F. Multidomain integration in the structure of the HNF-4alpha nuclear receptor complex. Nature. 2013 Mar 21;495(7441):394-8. doi: 10.1038/nature11966. Epub 2013 Mar 13. PMID:23485969 doi:http://dx.doi.org/10.1038/nature11966

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

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

@@ Line 1: / Line 1: @@
 ==Multi-Domain Organization of the HNF4alpha Nuclear Receptor Complex on DNA==
 <StructureSection load='4iqr' size='340' side='right' caption='[[4iqr]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4iqr]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IQR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4IQR FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4iqr]] is a 12 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=4IQR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4IQR FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MYR:MYRISTIC+ACID'>MYR</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HNF4A, HNF4, NR2A1, TCF14 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HNF4A, HNF4, NR2A1, TCF14 ([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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4iqr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4iqr OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4iqr RCSB], [http://www.ebi.ac.uk/pdbsum/4iqr 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=4iqr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4iqr OCA], [http://pdbe.org/4iqr PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4iqr RCSB], [http://www.ebi.ac.uk/pdbsum/4iqr PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4iqr ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 19: / Line 20: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4iqr" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Chandra, V]]
 [[Category: Huang, P]]

4iqr

From Proteopedia

Revision as of 09:54, 4 August 2016

Multi-Domain Organization of the HNF4alpha Nuclear Receptor Complex on DNA

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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