Abstract
Systematic evolution of ligands by exponential enrichment (SELEX) is a method that allows isolating specific nucleotide sequences that interact with a DNA binding protein of choice. By using a transcription factor (TF) and a randomized pool of double-stranded DNA, this technique can be used to characterize TF DNA binding specificities and affinities. The method is based on protein-DNA complex immunoprecipitation with protein-specific antibodies and subsequent DNA selection and amplification. Application of massively parallel sequencing (-seq) at each cycle of SELEX allows determining the relative affinities to any DNA sequence for any transcription factor or TF complex. The resulting TF DNA binding motifs can be used to predict potential DNA binding sites in genomes and thereby direct target genes of TFs.
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Acknowledgments
We would like to thank Arttu Jolma and Jussi Taipale for providing barcoded ssDNA libraries and sharing details on the dsDNA library preparation and amplification. This work was supported by an NWO-VIDI grant to KK.
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Smaczniak, C., Angenent, G.C., Kaufmann, K. (2017). SELEX-Seq: A Method to Determine DNA Binding Specificities of Plant Transcription Factors. In: Kaufmann, K., Mueller-Roeber, B. (eds) Plant Gene Regulatory Networks. Methods in Molecular Biology, vol 1629. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-7125-1_6
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DOI: https://doi.org/10.1007/978-1-4939-7125-1_6
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