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| | <StructureSection load='1zbb' size='340' side='right'caption='[[1zbb]], [[Resolution|resolution]] 9.00Å' scene=''> | | <StructureSection load='1zbb' size='340' side='right'caption='[[1zbb]], [[Resolution|resolution]] 9.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1zbb]] is a 18 chain structure with sequence from [https://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=1ZBB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZBB FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1zbb]] is a 18 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=1ZBB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZBB FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1kx5|1kx5]]</div></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]] 9Å</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=1zbb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zbb OCA], [https://pdbe.org/1zbb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zbb RCSB], [https://www.ebi.ac.uk/pdbsum/1zbb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zbb ProSAT]</span></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=1zbb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zbb OCA], [https://pdbe.org/1zbb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zbb RCSB], [https://www.ebi.ac.uk/pdbsum/1zbb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zbb ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://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. [[https://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. [[https://www.uniprot.org/uniprot/H2A1_XENLA H2A1_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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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: African clawed frog]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Duda, S]] | + | [[Category: Xenopus laevis]] |
| - | [[Category: Richmond, T J]] | + | [[Category: Duda S]] |
| - | [[Category: Sargent, D F]] | + | [[Category: Richmond TJ]] |
| - | [[Category: Schalch, T]] | + | [[Category: Sargent DF]] |
| - | [[Category: Chromatin]] | + | [[Category: Schalch T]] |
| - | [[Category: Chromatin fiber]]
| + | |
| - | [[Category: Histone]]
| + | |
| - | [[Category: Nucleoprotein]]
| + | |
| - | [[Category: Nucleosome]]
| + | |
| - | [[Category: Nucleosome core]]
| + | |
| - | [[Category: Protein-dna complex]]
| + | |
| - | [[Category: Protein-dna interaction]]
| + | |
| - | [[Category: Structural protein-dna complex]]
| + | |
| - | [[Category: Supercoiled dna]]
| + | |
| - | [[Category: Tetranucleosome]]
| + | |
| 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
DNA in eukaryotic chromosomes is organized in arrays of nucleosomes compacted into chromatin fibres. This higher-order structure of nucleosomes is the substrate for DNA replication, recombination, transcription and repair. Although the structure of the nucleosome core is known at near-atomic resolution, even the most fundamental information about the organization of nucleosomes in the fibre is controversial. Here we report the crystal structure of an oligonucleosome (a compact tetranucleosome) at 9 A resolution, solved by molecular replacement using the nucleosome core structure. The structure shows that linker DNA zigzags back and forth between two stacks of nucleosome cores, which form a truncated two-start helix, and does not follow a path compatible with a one-start solenoidal helix. The length of linker DNA is most probably buffered by stretching of the DNA contained in the nucleosome cores. We have built continuous fibre models by successively stacking tetranucleosomes one on another. The resulting models are nearly fully compacted and most closely resemble the previously described crossed-linker model. They suggest that the interfaces between nucleosomes along a single helix start are polymorphic.
X-ray structure of a tetranucleosome and its implications for the chromatin fibre.,Schalch T, Duda S, Sargent DF, Richmond TJ Nature. 2005 Jul 7;436(7047):138-41. PMID:16001076[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Schalch T, Duda S, Sargent DF, Richmond TJ. X-ray structure of a tetranucleosome and its implications for the chromatin fibre. Nature. 2005 Jul 7;436(7047):138-41. PMID:16001076 doi:10.1038/nature03686
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