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    • 8. 发明授权
    • Affinity-based purification of oligonucleotides using soluble multimeric
oligonucleotides
    • 使用可溶性多聚寡核苷酸的亲和纯化寡核苷酸
    • US5912332A
    • 1999-06-15
    • US690300
    • 1996-07-26
    • Sudhir AgrawalIvan HabusEkambar R. Kandimalla
    • Sudhir AgrawalIvan HabusEkambar R. Kandimalla
    • C07H1/06C07H21/00C12Q1/68
    • C07H21/00C07H1/06
    • The present invention provides novel compounds and methods for purifying oligonucleotides. The compounds according to the invention are multimeric oligonucleotides comprising a multimerization domain for inducing multimeric oligonucleotide aggregation, a hybridization domain that is complementary to a target oligonucleotide whose isolation is desired, and a linker domain connecting the multimerization domain and the hybridization domain. Other compounds of the invention comprise dendrimers having oligonucleotides with hybridization domains linked thereto.The methods of the invention comprise contacting the compounds of the invention with a solution containing a target oligonucleotide whose purification is desired. The target oligonucleotide hybridizes to the hybridization domain of the inventive compounds, thereby forming an aggregate. Synthetic failure sequences (N-1, N-2, etc.) and other oligonucleotides not complementary to the hybridization domain do not hybridize with the hybridization domain of the compounds and remain free in solution. Conventional size exclusion chromatography or small pore filter membranes are then used to separate the aggregate (and hence target oligonucleotide) from the other oligonucleotides. The aggregate is denatured and the target oligonucleotide separated once again by size exclusion chromatography or with a small pore filter membrane.
    • 本发明提供了用于纯化寡核苷酸的新型化合物和方法。 根据本发明的化合物是多聚寡核苷酸,其包含用于诱导多聚寡核苷酸聚集的多聚化结构域,与需要分离的靶寡核苷酸互补的杂交结构域和连接多聚化结构域和杂交结构域的连接体结构域。 本发明的其它化合物包含具有与其连接的杂交结构域的寡核苷酸的树枝状大分子。 本发明的方法包括使本发明的化合物与含有需要纯化的靶寡核苷酸的溶液接触。 靶寡核苷酸与本发明化合物的杂交结构域杂交,从而形成聚集体。 合成失败序列(N-1,N-2等)和与杂交结构域不互补的其他寡核苷酸不与化合物的杂交结构域杂交并且在溶液中保持游离。 然后使用常规尺寸排阻色谱法或小孔过滤膜将聚集体(因此靶寡核苷酸)与其他寡核苷酸分离。 聚集体变性,并且目标寡核苷酸再次通过尺寸排阻色谱法或用小孔滤膜分离。