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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1r41]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R41 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1R41 FirstGlance]. <br>
<table><tr><td colspan='2'>[[1r41]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R41 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1R41 FirstGlance]. <br>
</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=5CM:5-METHYL-2-DEOXY-CYTIDINE-5-MONOPHOSPHATE'>5CM</scene></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]] 1.9&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1r3z|1r3z]]</div></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=5CM:5-METHYL-2-DEOXY-CYTIDINE-5-MONOPHOSPHATE'>5CM</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=1r41 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r41 OCA], [https://pdbe.org/1r41 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1r41 RCSB], [https://www.ebi.ac.uk/pdbsum/1r41 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1r41 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=1r41 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r41 OCA], [https://pdbe.org/1r41 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1r41 RCSB], [https://www.ebi.ac.uk/pdbsum/1r41 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1r41 ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The crystal structures of two alternating octamers d(Gm(5)CGm(5)CGCGC) and d(GCGCGm(5)CGm(5)C) have been determined at 1.7 and 1.9 A resolution with R(work)/R(free) of 16.9/19.6% and 17.9/19.8%, respectively. The two octamers crystallized in the same tetragonal space group P4(3)2(1)2, with unit-cell parameters a = b = 43.0, c = 24.9 A and a = b = 43.1, c = 24.7 A, respectively. Both structures adopt the A-type double helix and the abutting crystal packing. Despite the different positions of the methylated cytosine in the sequence, the two octamers display essentially the same conformation. The close similarity of the two structures indicates that methylation at different positions in a DNA sequence does not affect the helical conformation of the alternating DNA octamer. Investigation of other related crystal structures implies that methylation of cytosine stabilizes the A-type conformation for alternating DNA sequences beginning with a 5'-purine but is beneficial to the Z-type conformation for alternating DNA sequences beginning with a 5'-pyrimidine.
Structures of d(Gm5)CGm5CGCGC) and d(GCGCGm5CGm5C): effects of methylation on alternating DNA octamers.,Shi K, Pan B, Tippin D, Sundaralingam M Acta Crystallogr D Biol Crystallogr. 2004 Jan;60(Pt 1):61-5. Epub 2003 Dec, 18. PMID:14684893<ref>PMID:14684893</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1r41" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Pan, B]]
[[Category: Pan B]]
[[Category: Shi, K]]
[[Category: Shi K]]
[[Category: Sundaralingam, M]]
[[Category: Sundaralingam M]]
[[Category: Tippin, D]]
[[Category: Tippin D]]
[[Category: Dna]]

Latest revision as of 08:20, 14 February 2024

Crystal structures of d(Gm5CGm5CGCGC) and d(GCGCGm5CGm5C): Effects of methylation on alternating DNA octamers

1r41, resolution 1.90Å

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