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- W2938871671 abstract "Enhancers are one of the most important classes of cis-regulatory elements (CREs) and play key roles in regulation of transcription in higher eukaryotes. Enhancers are difficult to identify because they lack positional constraints relative to their cognate genes. Excitingly, several recent studies showed that plant enhancers can be predicted based on their distinct features associated with open chromatin. However, experimental validation is necessary to confirm the predicted enhancer function.We developed a rapid enhancer validation system based on Nicotiana benthamiana. A set of 12 intergenic and intronic enhancers, identified in Arabidopsis thaliana, were cloned into a vector containing a minimal 35S promoter and a luciferase reporter gene, and were then infiltrated into N. benthamiana leaves mediated by agrobacterium. The enhancer activity of each candidate was quantitatively assayed based on bioluminescence measurement. The data from this luciferase-based validation was correlated with previous data derived from transgenic assays in A. thaliana. In addition, the relative strength of different enhancers for driving the reporter gene can be quantitatively compared. We demonstrate that this system can also be used to map the functional activity of a candidate enhancer under different environmental conditions.In summary, we developed a rapid and efficient plant enhancer validation system based on a luciferase reporter and N. benthamiana-based leaf agroinfiltration. This system can be used for initial screening of leaf-specific enhancers and for validating candidate leaf enhancers from dicot species. It can potentially be used to examine the activity of candidate enhancers under different environmental conditions." @default.
- W2938871671 created "2019-04-25" @default.
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- W2938871671 date "2019-03-06" @default.
- W2938871671 modified "2023-10-18" @default.
- W2938871671 title "Rapid validation of transcriptional enhancers using agrobacterium-mediated transient assay" @default.
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- W2938871671 doi "https://doi.org/10.1186/s13007-019-0407-y" @default.
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- W2938871671 hasPublicationYear "2019" @default.
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