2hue: Difference between revisions

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-[[Image:2hue.gif|left|200px]]
- {{Structure
+==Structure of the H3-H4 chaperone Asf1 bound to histones H3 and H4==
-|PDB= 2hue |SIZE=350|CAPTION= <scene name='initialview01'>2hue</scene>, resolution 1.7&Aring;
+<StructureSection load='2hue' size='340' side='right'caption='[[2hue]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
-|SITE=
+== Structural highlights ==
-|LIGAND= <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> and <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>
+<table><tr><td colspan='2'>[[2hue]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae] and [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HUE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HUE FirstGlance]. <br>
-|ACTIVITY=
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7&#8491;</td></tr>
-|GENE= ASF1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]), H3l ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=8355 Xenopus laevis])
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=2hue FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hue OCA], [https://pdbe.org/2hue PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hue RCSB], [https://www.ebi.ac.uk/pdbsum/2hue PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hue ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/ASF1_YEAST ASF1_YEAST] Histone chaperone that facilitates histone deposition and histone exchange and removal during nucleosome assembly and disassembly. Facilitates histone deposition through both replication-dependent and replication-independent chromatin assembly pathways. Cooperates with chromatin assembly factor 1 (CAF-1) to promote replication-dependent chromatin assembly and with the HIR complex to promote replication-independent chromatin assembly, which may occur during transcription and DNA repair. May be required for the maintenance of a subset of replication elongation factors, including DNA polymerase epsilon, the RFC complex and PCNA, at stalled replication forks. Also required for acetylation of histone H3 on 'Lys-9' and 'Lys-56'.<ref>PMID:9290207</ref> <ref>PMID:10591219</ref> <ref>PMID:11412995</ref> <ref>PMID:11331602</ref> <ref>PMID:11731479</ref> <ref>PMID:11731480</ref> <ref>PMID:11404324</ref> <ref>PMID:11172707</ref> <ref>PMID:11856374</ref> <ref>PMID:11756556</ref> <ref>PMID:12093919</ref> <ref>PMID:14585955</ref> <ref>PMID:15071494</ref> <ref>PMID:15452122</ref> <ref>PMID:15175160</ref> <ref>PMID:15542829</ref> <ref>PMID:15542840</ref> <ref>PMID:15766286</ref> <ref>PMID:16303565</ref> <ref>PMID:15821127</ref> <ref>PMID:15901673</ref> <ref>PMID:16020781</ref> <ref>PMID:16143623</ref> <ref>PMID:16039596</ref> <ref>PMID:15632066</ref> <ref>PMID:15891116</ref> <ref>PMID:16141196</ref> <ref>PMID:15840725</ref> <ref>PMID:16815704</ref> <ref>PMID:16936140</ref> <ref>PMID:16582440</ref> <ref>PMID:16407267</ref> <ref>PMID:17046836</ref> <ref>PMID:16678113</ref> <ref>PMID:16501045</ref> <ref>PMID:16627621</ref> <ref>PMID:17107956</ref> <ref>PMID:17320445</ref> <ref>PMID:14680630</ref>
+== Evolutionary Conservation ==
+[[Image:Consurf_key_small.gif|200px|right]]
+Check<jmol>
+  <jmolCheckbox>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hu/2hue_consurf.spt"</scriptWhenChecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <text>to colour the structure by Evolutionary Conservation</text>
+  </jmolCheckbox>
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2hue ConSurf].
+<div style="clear:both"></div>
-'''Structure of the H3-H4 chaperone Asf1 bound to histones H3 and H4'''
+==See Also==
+*[[Anti-silencing factor 3D structures|Anti-silencing factor 3D structures]]
+*[[Histone|Histone]]
-==Overview==
+*[[Histone 3D structures|Histone 3D structures]]
-Anti-silencing function 1 (Asf1) is a highly conserved chaperone of histones H3/H4 that assembles or disassembles chromatin during transcription, replication, and repair. The structure of the globular domain of Asf1 bound to H3/H4 determined by X-ray crystallography to a resolution of 1.7 Angstroms shows how Asf1 binds the H3/H4 heterodimer, enveloping the C terminus of histone H3 and physically blocking formation of the H3/H4 heterotetramer. Unexpectedly, the C terminus of histone H4 that forms a mini-beta sheet with histone H2A in the nucleosome undergoes a major conformational change upon binding to Asf1 and adds a beta strand to the Asf1 beta sheet sandwich. Interactions with both H3 and H4 were required for Asf1 histone chaperone function in vivo and in vitro. The Asf1-H3/H4 structure suggests a "strand-capture" mechanism whereby the H4 tail acts as a lever to facilitate chromatin disassembly/assembly that may be used ubiquitously by histone chaperones.
+== References ==
+<references/>
-==About this Structure==
+__TOC__
-HUE is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae] and [http://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HUE OCA].
+</StructureSection>
+[[Category: Large Structures]]
-==Reference==
-Structural basis for the histone chaperone activity of Asf1., English CM, Adkins MW, Carson JJ, Churchill ME, Tyler JK, Cell. 2006 Nov 3;127(3):495-508. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17081973 17081973]
-[[Category: Protein complex]]
 [[Category: Saccharomyces cerevisiae]]
 [[Category: Xenopus laevis]]
-[[Category: Churchill, M E.A.]]
+[[Category: Churchill MEA]]
-[[Category: English, C M]]
+[[Category: English CM]]
-[[Category: Tyler, J K.]]
+[[Category: Tyler JK]]
-[[Category: GOL]]
-[[Category: SO4]]
-[[Category: ZN]]
-[[Category: elongated beta sandwhich]]
-[[Category: mini beta sheet]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 17:21:42 2008''