A Multiplexed Transcription Activator-like Effector System for Detecting Specific DNA Sequences
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- 作者：Ali Honarmand ; Robert Mayall ; Iain George ; Lisa Oberding ; Himika Dastidar ; Jamie Fegan ; Somshukla Chaudhuri ; Justin Dole ; Sharon Feng ; Denny Hoang ; Ruth Moges ; Julie Osgood ; Taylor Remondini ; Wm. Keith van der Meulen ; Su Wang ; Chris Wintersinger ; Amanda Zaparoli Zucoloto ; Kate Chatfield-Reed ; Mayi Arcellana-Panlilio ; Anders Nygren
- 刊名：ACS Synthetic Biology
- 出版年：2014
- 出版时间：December 19, 2014
- 年：2014
- 卷：3
- 期：12
- 页码：953-955
- 全文大小：181K
- ISSN：2161-5063
文摘
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.