4zkk: Difference between revisions
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==The novel double-fold structure of d(GCATGCATGC)== | ==The novel double-fold structure of d(GCATGCATGC)== | ||
<StructureSection load='4zkk' size='340' side='right' caption='[[4zkk]], [[Resolution|resolution]] 1.80Å' scene=''> | <StructureSection load='4zkk' size='340' side='right'caption='[[4zkk]], [[Resolution|resolution]] 1.80Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4zkk]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ZKK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ZKK FirstGlance]. <br> | <table><tr><td colspan='2'>[[4zkk]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ZKK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ZKK FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene></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=4zkk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4zkk OCA], [http://pdbe.org/4zkk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4zkk RCSB], [http://www.ebi.ac.uk/pdbsum/4zkk PDBsum]</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=4zkk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4zkk OCA], [http://pdbe.org/4zkk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4zkk RCSB], [http://www.ebi.ac.uk/pdbsum/4zkk PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4zkk ProSAT]</span></td></tr> | ||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Gautham, N]] | [[Category: Gautham, N]] | ||
[[Category: Karthik, S]] | [[Category: Karthik, S]] | ||
Revision as of 11:31, 26 June 2019
The novel double-fold structure of d(GCATGCATGC)The novel double-fold structure of d(GCATGCATGC)
Structural highlights
Publication Abstract from PubMedThe structure of the decadeoxyribonucleotide d(GCATGCATGC) is presented at a resolution of 1.8 A. The decamer adopts a novel double-folded structure in which the direction of progression of the backbone changes at the two thymine residues. Intra-strand stacking interactions (including an interaction between the endocylic O atom of a ribose moiety and the adjacent purine base), hydrogen bonds and cobalt-ion interactions stabilize the double-folded structure of the single strand. Two such double-folded strands come together in the crystal to form a dimer. Inter-strand Watson-Crick hydrogen bonds form four base pairs. This portion of the decamer structure is similar to that observed in other previously reported oligonucleotide structures and has been dubbed a `bi-loop'. Both the double-folded single-strand structure, as well as the dimeric bi-loop structure, serve as starting points to construct models for triplet-repeat DNA sequences, which have been implicated in many human diseases. The novel double-folded structure of d(GCATGCATGC): a possible model for triplet-repeat sequences.,Thirugnanasambandam A, Karthik S, Mandal PK, Gautham N Acta Crystallogr D Biol Crystallogr. 2015 Oct;71(Pt 10):2119-26. doi:, 10.1107/S1399004715013930. Epub 2015 Sep 30. PMID:26457435[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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