Copper-Alkyne Complexation Responsible for the Nucleolar Localization of Quadruplex Nucleic Acid Drugs Labeled by Click Reactions
作者:Joël Lefebvre、Corinne Guetta、Florent Poyer、Florence Mahuteau-Betzer、Marie-Paule Teulade-Fichou
DOI:10.1002/anie.201703783
日期:2017.9.11
in vitro and in cells. We explored the cellular localization of PhenDC3, one of the most powerful G4 ligands, by synthesizing two clickable azide and alkyne derivatives (PhenDC3‐alk, PhenDC3‐az) and labeling them in situ with the corresponding Cy5 click partners. A careful comparison of the results obtained for the copper‐based CuAAC and copper‐free SPAAC methodologies in fixed cells implicated CuI/alkyne
G-四链体(G4)是在富含鸟嘌呤的序列中发现的非规范核酸结构。可以用充当报道分子的小分子(G4配体)作为靶标,以在体外和细胞中进行追踪。我们通过合成两个可点击的叠氮化物和炔烃衍生物(PhenDC 3 alk,PhenDC 3 az)并用相应的Cy5 click合作伙伴原位标记,探索了最强大的G4配体之一PhenDC 3的细胞定位。仔细比较固定单元中涉及铜I的铜基CuAAC和无铜SPAAC方法获得的结果/炔中间体的非特异性配体(和荧光团)定位于核仁。相比之下,SPAAC在固定细胞和活细胞中产生相似的核质标记模式。我们的发现表明,在使用CuAAC在细胞中定位药物时需要格外小心,并且表明SPAAC所提供的结果在固定细胞和活细胞之间更加一致。