title: Arabidopsis NPH3: A NPH1 photoreceptor-interacting protein essential for phototropism.
abstract: Phototropism of Arabidopsis thaliana seedlings in response to a blue light source is initiated by nonphototropic hypocotyl 1 (NPH1), a light-activated serine-threonine protein kinase. Mutations in three loci [NPH2, root phototropism 2 (RPT2), and NPH3] disrupt early signaling occurring downstream of the NPH1 photoreceptor. The NPH3 gene, now cloned, encodes a NPH1-interacting protein. NPH3 is a member of a large protein family, apparently specific to higher plants, and may function as an adapter or scaffold protein to bring together the enzymatic components of a NPH1-activated phosphorelay.
authors.affiliation: Division of Biological Sciences, University of Missouri, Columbia, MO 65211, USA.
authors.forename: A
authors.initials: A
authors.lastname: Motchoulski
authors.forename: E
authors.initials: E
authors.lastname: Liscum
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins; D002462:Cell Membrane / Q000378:metabolism; D003001:Cloning, Molecular; D004926:Escherichia coli; D008969:Molecular Sequence Data; D010750:Phosphoproteins / Q000235:genetics / Q000378:metabolism*; D017956:Photoreceptor Cells, Invertebrate / Q000378:metabolism*; D018524:Phototropism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D011485:Protein Binding; D017346:Protein Serine-Threonine Kinases; D020798:Two-Hybrid System Techniques
chemical_list: D029681:Arabidopsis Proteins; C400222:NPH3 protein, Arabidopsis; D010750:Phosphoproteins; D010940:Plant Proteins; C103646:NPH1 protein, Arabidopsis; D017346:Protein Serine-Threonine Kinases