Download MendeleySynthesis and properties of fully-modified 4'-selenoRNA, an endonuclease-resistant RNA analog.
Ota, M., Takahashi, H., Nogi, Y., Kagotani, Y., Saito-Tarashima, N., Kondo, J., Minakawa, N.(2022) Bioorg Med Chem 76: 117093-117093
- PubMed: 36434923
- DOI: https://doi.org/10.1016/j.bmc.2022.117093
- Primary Citation of Related Structures:
7Y8P - PubMed Abstract:
A large number of chemically modified oligonucleotides (ONs) have been developed for RNA-based technologies. In most modified RNAs, the characteristic 2'-hydroxyl (2'-OH) groups are removed to enhance both nuclease resistance and hybridization ability. However, the importance of the 2'-OH group in RNA structure and function is well known. Here, we report the synthesis and properties of 4'-selenoRNA in which all four nucleoside units retain the 2'-OH groups but contain a selenium atom instead of an oxygen atom at the 4'-position of the furanose ring. 4'-SelenoRNA has enhanced ability to form duplexes with RNA, and high endonuclease resistance despite the presence of the 2'-OH groups. X-ray crystallography analysis showed that the 4'-selenoRNA duplex adopts an A-conformation, similar to natural RNA, although one 4'-selenocytidine residue has unusual South-type sugar puckering. Furthermore, preliminary studies using 4'-seleno-modified siRNAs suggest that 4'-selenoRNA may be applicable to RNA interference technology. Collectively, our results raise the possibility of a new class of modified RNA in which 2'-OH groups do not need to be masked.
Organizational Affiliation:
Graduate School of Pharmaceutical Science, Tokushima University, Shomachi 1-78-1, Tokushima 770-8505, Japan.
