Download MendeleyCarbohydrate-DNA interactions at G-quadruplexes: folding and stability changes by attaching sugars at the 5'-end.
Gomez-Pinto, I., Vengut-Climent, E., Lucas, R., Avino, A., Eritja, R., Gonzalez, C., Morales, J.C.(2013) Chemistry 19: 1920-1927
- PubMed: 23315826
- DOI: https://doi.org/10.1002/chem.201203902
- Primary Citation of Related Structures:
2LYG - PubMed Abstract:
Quadruplex DNA structures are attracting an enormous interest in many areas of chemistry, ranging from chemical biology, supramolecular chemistry to nanoscience. We have prepared carbohydrate-DNA conjugates containing the oligonucleotide sequences of G-quadruplexes (thrombin binding aptamer (TBA) and human telomere (TEL)), measured their thermal stability and studied their structure in solution by using NMR and molecular dynamics. The solution structure of a fucose-TBA conjugate shows stacking interactions between the carbohydrate and the DNA G-tetrad in addition to hydrogen bonding and hydrophobic contacts. We have also shown that attaching carbohydrates at the 5'-end of a quadruplex telomeric sequence can alter its folding topology. These results suggest the possibility of modulating the folding of the G-quadruplex by linking carbohydrates and have clear implications in molecular recognition and the design of new G-quadruplex ligands.
Organizational Affiliation:
Instituto de Química Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain.
