View source for 5b2i


==Human nucleosome containing CpG unmethylated DNA==
<StructureSection load='5b2i' size='340' side='right'caption='[[5b2i]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5b2i]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5B2I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5B2I FirstGlance]. <br>
</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&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</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=5b2i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5b2i OCA], [https://pdbe.org/5b2i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5b2i RCSB], [https://www.ebi.ac.uk/pdbsum/5b2i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5b2i ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/H31_HUMAN H31_HUMAN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Cytosine methylation, predominantly of the CpG sequence in vertebrates, is one of the major epigenetic modifications crucially involved in the control of gene expression. Due to the difficulty of reconstituting site-specifically methylated nucleosomal DNA at crystallization quality, most structural analyses of CpG methylation have been performed using chemically synthesized oligonucleotides, There has been just one recent study of nucleosome core particles (NCPs) reconstituted with nonpalindromic human satellite 2-derived DNAs. Through the preparation of a 146-bp palindromic alpha-satellite-based nucleosomal DNA containing four CpG dinucleotide sequences and its enzymatic methylation and restriction, we reconstituted a 'symmetric' human CpG-methylated nucleosome core particle (NCP). We solved the crystal structures of the CpG-methylated and unmodified NCPs at 2.6 and 3.0 A resolution, respectively. We observed the electron densities of two methyl groups, among the eight 5-methylcytosines introduced in the CpG-fully methylated NCP. There were no obvious structural differences between the CpG-methylated 'symmetric NCP' and the unmodified NCP. The preparation of a crystallization-grade CpG-methylated NCP provides a platform for the analysis of CpG-methyl reader and eraser proteins.

Crystal structure of human nucleosome core particle containing enzymatically introduced CpG methylation.,Fujii Y, Wakamori M, Umehara T, Yokoyama S FEBS Open Bio. 2016 May 3;6(6):498-514. doi: 10.1002/2211-5463.12064. eCollection, 2016 Jun. PMID:27419055<ref>PMID:27419055</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5b2i" style="background-color:#fffaf0;"></div>

==See Also==
*[[Histone 3D structures|Histone 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Fujii Y]]
[[Category: Umehara T]]
[[Category: Wakamori M]]
[[Category: Yokoyama S]]