Disclosed herein are oligonucleotides, such as nucleic acid inhibitor molecules, having a 4'-phosphate analog and methods of using the same, for example, to modulate the expression of a target gene in a cell. The phosphate analogs are bound to the 4'-carbon of the sugar moiety (e.g., a ribose or deoxyribose or analog thereof) of the 5'-terminal nucleotide of an oligonucleotide. Typically, the phosphate analog is an oxymethylphosphonate, where the oxygen atom of the oxymethyl group is bound to the 4'-carbon of the sugar moiety or analog thereof.
本文披露了寡核苷酸,例如具有4'-
磷酸盐类似物的核酸抑制分子,以及使用这些分子的方法,例如用于调节细胞中靶
基因的表达。
磷酸盐类似物与寡核苷酸的5'-端核苷酸的糖基(例如
核糖或脱氧
核糖或其类似物)的4'-碳结合。通常,
磷酸盐类似物是氧
甲基膦酸盐,其中氧甲基基团的氧原子与糖基或其类似物的4'-碳结合。