5gwq
From Proteopedia
(Difference between revisions)
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5gwq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5gwq OCA], [https://pdbe.org/5gwq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5gwq RCSB], [https://www.ebi.ac.uk/pdbsum/5gwq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5gwq 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=5gwq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5gwq OCA], [https://pdbe.org/5gwq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5gwq RCSB], [https://www.ebi.ac.uk/pdbsum/5gwq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5gwq ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | The non-B DNA structures formed by short tandem repeats on the nascent strand during DNA replication have been proposed to be the structural intermediates that lead to repeat expansion mutations. Tetranucleotide TTTA and CCTG repeat expansions have been known to cause reduction in biofilm formation in Staphylococcus aureus and myotonic dystrophy type 2 in human, respectively. In this study, we report the first three-dimensional minidumbbell (MDB) structure formed by natural DNA sequences containing two TTTA or CCTG repeats. The formation of MDB provides possible pathways for strand slippage to occur, which ultimately leads to repair escape and thus expansion mutations. Our result here shows that MDB is a highly compact structure composed of two type II loops. In addition to the typical stabilizing interactions in type II loops, MDB shows extensive stabilizing forces between the two loops, including two distinctive modes of interactions between the minor groove residues. The formation of MDB enriches the structural diversity of natural DNA sequences, reveals the importance of loop-loop interactions in unusual DNA structures, and provides insights into novel mechanistic pathways of DNA repeat expansion mutations. | ||
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| - | Minidumbbell: A New Form of Native DNA Structure.,Guo P, Lam SL J Am Chem Soc. 2016 Sep 28;138(38):12534-40. doi: 10.1021/jacs.6b06897. Epub 2016, Sep 16. PMID:27589409<ref>PMID:27589409</ref> | ||
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| - | </div> | ||
| - | <div class="pdbe-citations 5gwq" style="background-color:#fffaf0;"></div> | ||
| - | == References == | ||
| - | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
Current revision
Structure of two TTTA repeats
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