High Affinity, Sequence Specific DNA Binding by Synthetic Tripyrrole-Peptide Conjugates
作者:Juan B. Blanco、Olalla Vázquez、José Martínez-Costas、Luis Castedo、José L. Mascareñas
DOI:10.1002/chem.200500010
日期:2005.7.4
basic region of a bZIP transcription factor to a distamycin-like tripyrrole peptide by means of a nitrogen-containing tether produces a hybrid capable of high-affinity recognition of specific, designated DNA sequences. The importance of the nitrogen in the tether is shown by the considerable reduction in affinity (more than 10-fold) caused by its replacement with an ether linkage. Attachment of an
通过含氮系链将bZIP转录因子的基本区域连接至双霉素样三吡咯肽,可产生能够高亲和力识别特定的指定DNA序列的杂合体。氮在系链中的重要性由其被醚键取代引起的亲和力显着降低(超过10倍)表明。氨基丙基链在邻近带有含氮系链的吡咯的吡咯上的连接将亲和力增加约一个数量级。这些结果证实,质子化的胺基在设计的DNA结合肽上的合适位置提供了更高的亲和力,这很可能是由于与磷酸二酯主链形成了盐桥联的接触。