title: Ethylene signaling: identification of a putative ETR1-AHP1 phosphorelay complex by fluorescence spectroscopy.
abstract: The plant ethylene receptor ETR1, which shows substantial sequence homology to typical bacterial histidine kinases, is involved in the coordination of several growth and development processes. Fluorescence polarization studies presented here demonstrate a specific interaction of ETR1 with the histidine-containing transfer protein AHP1, supporting the idea that a phosphorelay module is involved in ethylene signaling. The sensitive assay employed in our studies allows analysis of protein-protein interactions in a homogenous aqueous environment, exact control of external parameters, and quantitative analysis of the affinity and stability of the complex. Thereby it provides the basics for a more quantitative elucidation of phosphorelay modules acquired in phytohormone signaling.
authors.affiliation: Biochemie der Pflanzen, Heinrich-Heine Universität, Universitätsstr. 1, 40225 Düsseldorf, Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Scharein
authors.forename: Jan
authors.initials: J
authors.lastname: Voet-van-Vormizeele
authors.forename: Klaus
authors.initials: K
authors.lastname: Harter
authors.forename: Georg
authors.initials: G
authors.lastname: Groth
mesh_terms: D017360:Arabidopsis / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000302:isolation & purification / Q000378:metabolism*; D005030:Ethylenes / Q000378:metabolism*; D005454:Fluorescence Polarization; D018506:Gene Expression Regulation, Plant; D049452:Green Fluorescent Proteins / Q000378:metabolism; D010770:Phosphotransferases / Q000302:isolation & purification / Q000378:metabolism*; D011485:Protein Binding; D011956:Receptors, Cell Surface / Q000302:isolation & purification / Q000378:metabolism*; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence
chemical_list: C117966:AHP1 protein, Arabidopsis; D029681:Arabidopsis Proteins; C494590:ETR1 protein, Arabidopsis; D005030:Ethylenes; D011956:Receptors, Cell Surface; D049452:Green Fluorescent Proteins; C036216:ethylene; D010770:Phosphotransferases