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| | ==Structural characterization of H3K56Q nucleosomes and nucleosomal arrays== | | ==Structural characterization of H3K56Q nucleosomes and nucleosomal arrays== |
| - | <StructureSection load='3kwq' size='340' side='right' caption='[[3kwq]], [[Resolution|resolution]] 3.50Å' scene=''> | + | <StructureSection load='3kwq' size='340' side='right'caption='[[3kwq]], [[Resolution|resolution]] 3.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3kwq]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/African_clawed_frog African clawed frog]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3KWQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3KWQ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3kwq]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3KWQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3KWQ FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1aoi|1aoi]]</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]] 3.5Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LOC494591 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=8355 African clawed frog])</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=3kwq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3kwq OCA], [https://pdbe.org/3kwq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3kwq RCSB], [https://www.ebi.ac.uk/pdbsum/3kwq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3kwq 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=3kwq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3kwq OCA], [http://pdbe.org/3kwq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3kwq RCSB], [http://www.ebi.ac.uk/pdbsum/3kwq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3kwq ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/H2B11_XENLA H2B11_XENLA]] 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. [[http://www.uniprot.org/uniprot/H32_XENLA H32_XENLA]] 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. [[http://www.uniprot.org/uniprot/H4_XENLA H4_XENLA]] 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. | + | [https://www.uniprot.org/uniprot/H32_XENLA H32_XENLA] 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 == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Histone|Histone]] | + | *[[Histone 3D structures|Histone 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: African clawed frog]] | + | [[Category: Large Structures]] |
| - | [[Category: Clark, N]] | + | [[Category: Xenopus laevis]] |
| - | [[Category: Lilyestrom, W G]] | + | [[Category: Clark N]] |
| - | [[Category: Acetylation]] | + | [[Category: Lilyestrom WG]] |
| - | [[Category: Chromosomal protein]]
| + | |
| - | [[Category: Dna-binding]]
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| - | [[Category: Isopeptide bond]]
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| - | [[Category: Methylation]]
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| - | [[Category: Nucleosome core]]
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| - | [[Category: Nucleosome transcription k56 mutation]]
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| - | [[Category: Nucleus]]
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| - | [[Category: Phosphoprotein]]
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| - | [[Category: Structural protein-dna complex]]
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| - | [[Category: Ubl conjugation]]
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| Structural highlights
Function
H32_XENLA 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
The post-translational modification of histones is a key mechanism for the modulation of DNA accessibility. Acetylated lysine 56 in histone H3 is associated with nucleosome assembly during replication and DNA repair, and is thus likely to predominate in regions of chromatin containing nucleosome-free regions. Here we show by X-ray crystallography that mutation of H3 lysine 56 to glutamine (to mimic acetylation) or glutamate (to cause a charge reversal) has no detectable effects on the structure of the nucleosome. At the level of higher order chromatin structure, the K to Q substitution has no effect on the folding of model nucleosomal arrays in cis, regardless of the degree of nucleosome density. In contrast, defects in array-array interactions in trans ('oligomerization') are selectively observed for mutant H3 lysine 56 arrays that contain nucleosome-free regions. Our data suggests that H3K56 acetylation is one of the molecular mechanisms employed to keep chromatin with nucleosome-free regions accessible to the DNA replication and repair machinery.
Structural characterization of H3K56Q nucleosomes and nucleosomal arrays.,Watanabe S, Resch M, Lilyestrom W, Clark N, Hansen JC, Peterson C, Luger K Biochim Biophys Acta. 2010 May-Jun;1799(5-6):480-6. Epub 2010 Jan 25. PMID:20100606[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Watanabe S, Resch M, Lilyestrom W, Clark N, Hansen JC, Peterson C, Luger K. Structural characterization of H3K56Q nucleosomes and nucleosomal arrays. Biochim Biophys Acta. 2010 May-Jun;1799(5-6):480-6. Epub 2010 Jan 25. PMID:20100606 doi:10.1016/j.bbagrm.2010.01.009
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