Highly Polar Carbohydrates Stack onto DNA Duplexes via CH/π Interactions

• Published in: Journal of the American Chemical Society Vol. 133; no. 6; pp. 1909 - 1916
• Main Authors: Lucas, Ricardo, Gómez-Pinto, Irene, Aviñó, Anna, Reina, Jose J., Eritja, Ramón, González, Carlos, Morales, Juan C.
• Format: Journal Article
• Language: English
• Published: WASHINGTON American Chemical Society 16.02.2011; Amer Chemical Soc
• Subjects: Base Pairing; Base Sequence; Carbohydrate Conformation; Carbohydrates - chemistry; Chemistry; Chemistry, Multidisciplinary; DNA - chemistry; DNA - genetics; Models, Molecular; Oligodeoxyribonucleotides - chemistry; Oligodeoxyribonucleotides - genetics; Physical Sciences; Science & Technology; DOUBLE-HELIX; AROMATIC STACKING; OLIGONUCLEOTIDE DUPLEXES; BASE-PAIRS; MOLECULAR RECOGNITION; NMR-SPECTROSCOPY; STABILITY; RIBOSOMAL-RNA; AMINOGLYCOSIDE ANTIBIOTICS; MINOR-GROOVE
• ISSN: 0002-7863; 1520-5126
• DOI: 10.1021/ja108962j

Carbohydrate−nucleic acid contacts are known to be a fundamental part of some drug−DNA recognition processes. Most of these interactions occur through the minor groove of DNA, such as in the calicheamicin or anthracycline families, or through both minor and major groove binders such as in the pluramycins. Here, we demonstrate that carbohydrate−DNA interactions are also possible through sugar capping of a DNA double helix. Highly polar mono- and disaccharides are capable of CH/π stacking onto the terminal DNA base pair of a duplex as shown by NMR spectroscopy. The energetics of the carbohydrate−DNA interactions vary depending on the stereochemistry, polarity, and contact surface of the sugar involved and also on the terminal base pair. These results reveal carbohydrate−DNA base stacking as a potential recognition motif to be used in drug design, supramolecular chemistry, or biobased nanomaterials.