A Multiplexed Transcription Activator-like Effector System for Detecting Specific DNA Sequences

作者：Honarmand Ali; Mayall Robert; George Iain; Oberding Lisa; Dastidar Himika; Fegan Jamie; Chaudhuri Somshukla; Dole Justin; Feng Sharon; Hoang Denny; Moges Ruth; Osgood Julie; Remondini Taylor; van der Meulen Wm Keith; Wang Su; Wintersinger Chris; Zucoloto Amanda Zaparoli; Chatfield Reed Kate; Arcellana Panlilio Mayi^*; Nygren Anders

来源：ACS Synthetic Biology, 2014, 3(12): 953-955.

DOI：10.1021/sb500045w

Transcription activator-like effectors (TALEs), originating from the Xanthomonas genus of bacteria, bind to specific DNA sequences based on amino acid sequence in the repeat-variable diresidue (RVD) positions of the protein. By altering these RVDs, it has been shown that a TALE protein can be engineered to bind virtually any DNA sequence of interest. The possibility of multiplexing TALEs for the purposes of identifying specific DNA sequences has yet to be explored. Here, we demonstrate a system in which a TALE protein bound to a nitrocellulose strip has been utilized to capture purified DNA, which is then detected using the binding of a second distinct TALE protein conjugated to a protein tag that is then detected by a dot blot. This system provides a signal only when both TALEs bind to their respective sequences, further demonstrating the specificity of the TALE binding.

• 出版日期2014-12