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  • Title: Split-TALE: A TALE-Based Two-Component System for Synthetic Biology Applications in Planta.
    Author: Schreiber T, Prange A, Hoppe T, Tissier A.
    Journal: Plant Physiol; 2019 Mar; 179(3):1001-1012. PubMed ID: 30643014.
    Abstract:
    Transcription activator-like effectors (TALEs) are bacterial Type-III effector proteins from phytopathogenic Xanthomonas species that act as transcription factors in plants. The modular DNA-binding domain of TALEs can be reprogrammed to target nearly any DNA sequence. Here, we designed and optimized a two-component AND-gate system for synthetic circuits in plants based on TALEs. In this system, named split-TALE (sTALE), the TALE DNA binding domain and the transcription activation domain are separated and each fused to protein interacting domains. Physical interaction of interacting domains leads to TALE-reconstitution and can be monitored by reporter gene induction. This setup was used for optimization of the sTALE scaffolds, which result in an AND-gate system with an improved signal-to-noise ratio. We also provide a toolkit of ready-to-use vectors and single modules compatible with Golden Gate cloning and MoClo syntax. In addition to its implementation in synthetic regulatory circuits, the sTALE system allows the analysis of protein-protein interactions in planta.
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