Robeyns, Koen
[UCL]
Herdewijn, Piet
[]
Van Meervelt, Luc
[]
CeNA oligonucleotides consist of a phosphorylated backbone where the deoxyribose sugars are replaced by cyclohexene moieties. The X-ray structure determination and analysis of a fully modified octamer sequence GTGTACAC, which is the first crystal structure of a carbocyclic-based nucleic acid, is presented. This particular sequence was built with left-handed building blocks and crystallizes as a left-handed double helix. The helix can be characterized as belonging to the (mirrored) A-type family. Crystallographic data were processed up to 1.53 Å, and the octamer sequence crystallizes in the space group R32. The sugar puckering is found to adopt the 3H2 half-chair conformation which mimics the C3′-endo conformation of the ribose sugar. The double helices stack on top of each other to form continuous helices, and static disorder is observed due to this end-to-end stacking. © 2008 American Chemical Society.
Bibliographic reference |
Robeyns, Koen ; Herdewijn, Piet ; Van Meervelt, Luc. Structure of the fully modified left-handed cyclohexene nucleic acid sequence GTGTACAC. In: Journal of the American Chemical Society, Vol. 130, no. 6, p. 1979-1984 (2008) |
Permanent URL |
http://hdl.handle.net/2078/107442 |