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Analysis of in vitro DNA interactions of brassinosteroid-controlled transcription factors using electrophoretic mobility shift assay

  • Technical University of Munich

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

9 Scopus citations

Abstract

Most signaling cascades ultimately lead to changes in gene expression by modulating the activity of transcription factors (TFs). The electrophoretic mobility shift assay (EMSA) is a simple but powerful in vitro method for investigation of specific protein–DNA interactions. It makes use of the fact that protein–DNA complexes have a lower electrophoretic mobility in gels than free DNA has. The application of labeled probes in combination with unlabeled competitors allows investigation of DNA-binding specificity and identification of binding motifs with single base-pair resolution. Here we describe the application of EMSAs for the study of interactions of the brassinosteroid-regulated TFs, BRASSINAZOLE-RESISTANT1, (BZR1), BRI1-ETHYL METHANESULFONATE-SUPPRESSOR1 (BES1)/BZR2, and CESTA with putative binding sites. The classical approach using radiolabeled probes, as well as the more recent application of fluorescent probes, is described and the advantages and disadvantages of both methods are discussed.

Original languageEnglish
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Pages133-144
Number of pages12
DOIs
StatePublished - 2017

Publication series

NameMethods in Molecular Biology
Volume1564
ISSN (Print)1064-3745

Keywords

  • Competitor
  • Electrophoretic mobility shift assay
  • Fluorescence
  • Probe
  • Protein expression
  • Transcription factor

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