Bifunctional Zn(<scp>ii</scp>) complexes for recognition of non-canonical thymines in DNA bulges and G-quadruplexes
作者:Kevin E. Siters、Stephanie A. Sander、Jason R. Devlin、Janet R. Morrow
DOI:10.1039/c4dt03004d
日期:——
binding sites for all complexescontaining aromatic pendents. The complexes with two fused rings bound with low micromolar dissociation constants and two binding sites whereas a complex with three fused rings (ATQ) bound to three sites. This study shows that different pendent groups on Zn(II) cyclen complexes impart selectivity for recognition of non-canonical DNA structures.
研究了1,4,7,10-四氮杂十二烷(循环素)衍生物的六种Zn(II)配合物与包含非规范胸腺嘧啶的DNA序列的结合,包括带有单个胸腺嘧啶凸起(T-bulge)和G的发夹-胸腺嘧啶环的四联体(H-telo)。基于Cyclon的大环包含带有两个稠环的侧基,以产生平面基团,包括喹啉酮(QMC),香豆素(MCC)和喹啉(CQC)衍生物或非平面丹酰基(DSC)。还研究了具有三个稠环的大环配合物,包括蒽醌垂体(ATQ)。所有的Zn(II)配合物在溶液中均保持稳定,在微摩尔浓度和中性pH下,Zn(L)(OH 2))L = QMC和CQC在pH 7.5和100 mM NaCl时占主导地位的物种。使用固定的T型凸起或H-telo G-四链体通过表面等离振子共振(SPR)研究了某些复合物对复合物的结合。在大多数情况下,数据与通过等温量热法(ITC)获得的数据非常匹配,对于荧光络合物而言,通过荧光滴定得到的数据
Multiply Intercalator-Substituted Cu(II) Cyclen Complexes as DNA Condensers and DNA/RNA Synthesis Inhibitors
作者:Jan Hormann、Jaroslav Malina、Oliver Lemke、Max J. Hülsey、Stefanie Wedepohl、Jan Potthoff、Claudia Schmidt、Ingo Ott、Bettina G. Keller、Viktor Brabec、Nora Kulak
DOI:10.1021/acs.inorgchem.8b00027
日期:2018.5.7
condensation/aggregation phenomena. Molecular modeling suggests an unusual bisintercalation mode with only one base pair between the two AQ moieties and the metal complex as a linker. A regioisomer, in which the AQ moieties point in directions unfavorable for such an interaction, had a much weaker biological activity. The ligands alone and corresponding Zn(II) complexes (used as redox inert control compounds) also exhibited