申请人:University of Arkansas
公开号:US06657052B1
公开(公告)日:2003-12-02
A method for using an organic compound to label polynucleotides is described. The method utilizes an organic compound including an oligonucleotide, and electrophilic active site, an active complex, and a phosphate binding site. The oligonucleotide has a sequence that is complimentary to a specific region of a polynucleotide. This facilitates labeling of DNA or RNA at a specific site in its sequence. The active site consists of a stable precursor, and only becomes reactive upon activation. Leaving and protecting functional groups may be attached to the active site in order to facilitate the formation of a stable precursor and subsequent activation. The active complex may be a drug, polypeptide or a reporter molecule such as an isotope or fluorescing compound. The phosphate binding sites may be any functional group capable of forming ionic bonds with phosphate oxygens. Nucleotide labeling using this compound does not interfere with a polynucleotide sequence. The described method for utilizing this compound may be performed in situ. Latent reactivity is utilized to make the reaction chemically specific, alkylating only phosphodiester groups on the polynucleotide. A lactonization reaction traps the trialkylphosphate in a stable form.
描述了一种使用有机化合物标记多聚核苷酸的方法。该方法利用包括寡核苷酸、亲电活性位点、活性复合物和磷酸结合位点的有机化合物。寡核苷酸具有与多聚核苷酸特定区域互补的序列。这有助于在其序列中特定位置标记DNA或RNA。活性位点由稳定的前体组成,在激活后才变得活性。为了促进稳定前体的形成和随后的激活,可以连接离去和保护性功能基团到活性位点。活性复合物可以是药物、多肽或报告分子,如同位素或荧光化合物。磷酸结合位点可以是任何能够与磷酸氧形成离子键的功能基团。使用这种化合物进行核苷酸标记不会干扰多聚核苷酸序列。描述的利用该化合物的方法可以在原位进行。潜在的反应性用于使反应在化学上具有特异性,仅烷化多聚核苷酸上的磷酸二酯基团。内酯化反应将三烷基磷酸酯固定在稳定形式中。