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2puy

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Revision as of 16:55, 11 September 2015

Crystal Structure of the BHC80 PHD finger

Structural highlights

2puy is a 3 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:	PHF21A, BHC80, KIAA1696 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[PF21A_HUMAN] Component of the BHC complex, a corepressor complex that represses transcription of neuron-specific genes in non-neuronal cells. The BHC complex is recruited at RE1/NRSE sites by REST and acts by deacetylating and demethylating specific sites on histones, thereby acting as a chromatin modifier. In the BHC complex, it may act as a scaffold. Inhibits KDM1A-mediated demethylation of 'Lys-4' of histone H3 in vitro, suggesting a role in demethylation regulation.^[1] [H3_ZYGBA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Histone methylation is crucial for regulating chromatin structure, gene transcription and the epigenetic state of the cell. LSD1 is a lysine-specific histone demethylase that represses transcription by demethylating histone H3 on lysine 4 (ref. 1). The LSD1 complex contains a number of proteins, all of which have been assigned roles in events upstream of LSD1-mediated demethylation apart from BHC80 (also known as PHF21A), a plant homeodomain (PHD) finger-containing protein. Here we report that, in contrast to the PHD fingers of the bromodomain PHD finger transcription factor (BPTF) and inhibitor of growth family 2 (ING2), which bind methylated H3K4 (H3K4me3), the PHD finger of BHC80 binds unmethylated H3K4 (H3K4me0), and this interaction is specifically abrogated by methylation of H3K4. The crystal structure of the PHD finger of BHC80 bound to an unmodified H3 peptide has revealed the structural basis of the recognition of H3K4me0. Knockdown of BHC80 by RNA inhibition results in the de-repression of LSD1 target genes, and this repression is restored by the reintroduction of wild-type BHC80 but not by a PHD-finger mutant that cannot bind H3. Chromatin immunoprecipitation showed that BHC80 and LSD1 depend reciprocally on one another to associate with chromatin. These findings couple the function of BHC80 to that of LSD1, and indicate that unmodified H3K4 is part of the 'histone code'. They further raise the possibility that the generation and recognition of the unmodified state on histone tails in general might be just as crucial as post-translational modifications of histone for chromatin and transcriptional regulation.

Recognition of unmethylated histone H3 lysine 4 links BHC80 to LSD1-mediated gene repression.,Lan F, Collins RE, De Cegli R, Alpatov R, Horton JR, Shi X, Gozani O, Cheng X, Shi Y Nature. 2007 Aug 9;448(7154):718-22. PMID:17687328^[2]

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

References

↑ Shi YJ, Matson C, Lan F, Iwase S, Baba T, Shi Y. Regulation of LSD1 histone demethylase activity by its associated factors. Mol Cell. 2005 Sep 16;19(6):857-64. PMID:16140033 doi:10.1016/j.molcel.2005.08.027
↑ Lan F, Collins RE, De Cegli R, Alpatov R, Horton JR, Shi X, Gozani O, Cheng X, Shi Y. Recognition of unmethylated histone H3 lysine 4 links BHC80 to LSD1-mediated gene repression. Nature. 2007 Aug 9;448(7154):718-22. PMID:17687328 doi:10.1038/nature06034

1 Structural highlights
2 Function
3 Evolutionary Conservation
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/2puy"

@@ Line 2: / Line 2: @@
 <StructureSection load='2puy' size='340' side='right' caption='[[2puy]], [[Resolution|resolution]] 1.43&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2puy]] is a 3 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=2PUY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PUY FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2puy]] is a 3 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=2PUY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PUY FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PHF21A, BHC80, KIAA1696 ([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">PHF21A, BHC80, KIAA1696 ([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=2puy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2puy OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2puy RCSB], [http://www.ebi.ac.uk/pdbsum/2puy 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=2puy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2puy OCA], [http://pdbe.org/2puy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2puy RCSB], [http://www.ebi.ac.uk/pdbsum/2puy PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2puy" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Cheng, X]]
 [[Category: Collins, R E]]

2puy

From Proteopedia

Revision as of 16:55, 11 September 2015

Crystal Structure of the BHC80 PHD finger

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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