A conformational transition in the structure of a 2'-thiomethyl-modified DNA visualized at high resolution.Pallan, P.S., Prakash, T.P., Li, F., Eoff, R.L., Manoharan, M., Egli, M.
(2009) Chem Commun (Camb) 15: 2017-2019
- PubMed: 19333476
- DOI: https://doi.org/10.1039/b822781k
- Primary Citation of Related Structures:
3EY1, 3EY2, 3EY3
- PubMed Abstract:
Crystal structures of A-form and B-form DNA duplexes containing 2'-S-methyl-uridines reveal that the modified residues adopt a RNA-like C3'-endo pucker, illustrating that the replacement of electronegative oxygen at the 2'-carbon of RNA by sulfur does not appear to fundamentally alter the conformational preference of the sugar in the oligonucleotide context and sterics trump stereoelectronics.
Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.