title: Quantitative Analysis of Protein-DNA Interaction by qDPI-ELISA.
abstract: The specific binding of DNA-binding proteins to their cognate DNA motifs is a crucial step for gene expression control and chromatin organization in vivo. The development of methods for the identification of in vivo binding regions by, e.g. chromatin immunoprecipitation (ChIP) or DNA adenine methyltransferase identification (Dam-ID) added an additional level of qualitative information for data mining in systems biology or applications in synthetic biology. In this respect, the in vivo techniques outpaced methods for thorough characterization of protein-DNA interaction and, especially, of the binding motifs at single base-pair resolution. The elucidation of DNA-binding capacities of proteins is frequently done with methods such as yeast one-hybrid, electrophoretic mobility shift assay (EMSA) or systematic evolution of ligands by exponential enrichment (SELEX) that provide only qualitative binding information and are not suited for automation or high-throughput screening of several DNA motifs. Here, we describe the quantitative DNA-protein-Interaction-ELISA (qDPI-ELISA) protocol, which makes use of fluorescent fusion proteins and, hence, is faster and easier to handle than the classical DPI-ELISA. Although every DPI-ELISA experiment delivers quantitative information, the qDPI-ELISA has an increased consistency, as it does not depend on immunological detection. We demonstrate the high comparability between probes and different protein extracts in qDPI-ELISA experiments.
authors.affiliation: ZMBP Pflanzenphysiologie, Universität Tübingen, Auf der Morgenstelle 32, 72076, Tübingen, Germany.
authors.forename: Stefan M
authors.initials: SM
authors.lastname: Fischer
authors.affiliation: ZHMB Pflanzenbiologie, Universität des Saarlandes, Campus 2.4, 66123, Saarbrücken, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Böser
authors.affiliation: ZHMB Pflanzenbiologie, Universität des Saarlandes, Campus 2.4, 66123, Saarbrücken, Germany.
authors.forename: Jan P
authors.initials: JP
authors.lastname: Hirsch
authors.affiliation: ZMBP Pflanzenphysiologie, Universität Tübingen, Auf der Morgenstelle 32, 72076, Tübingen, Germany. dierk.wanke@zmbp.uni-tuebingen.de.|ZHMB Pflanzenbiologie, Universität des Saarlandes, Campus 2.4, 66123, Saarbrücken, Germany. dierk.wanke@zmbp.uni-tuebingen.de.
authors.forename: Dierk
authors.initials: D
authors.lastname: Wanke
mesh_terms: D001665:Binding Sites; D002843:Chromatin / Q000737:chemistry / Q000235:genetics; D047369:Chromatin Immunoprecipitation / Q000379:methods*; D004247:DNA / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000737:chemistry* / Q000235:genetics; D059372:Nucleotide Motifs / Q000235:genetics; D011485:Protein Binding / Q000235:genetics; D015265:Site-Specific DNA-Methyltransferase (Adenine-Specific) / Q000737:chemistry / Q000235:genetics; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics
chemical_list: D002843:Chromatin; D004268:DNA-Binding Proteins; D014157:Transcription Factors; D004247:DNA; D015265:Site-Specific DNA-Methyltransferase (Adenine-Specific)
keywords: Cis-regulatory elements; DNA binding; GFP-BPC6; Protein–DNA interaction; Quantitative DNA–protein-Interaction-ELISA (qDPI-ELISA); Quantitative analysis of DNA binding; Synthetic DNA probes; Transcription factor-DNA binding kinetics