title: The phototropin family as photoreceptors for blue light-induced chloroplast relocation.
abstract: Blue light-induced chloroplast accumulation and avoidance relocation movements are controlled by the blue light photoreceptor phototropin. The Arabidopsis thaliana genome has two phototropin genes encoding phot1 and phot2. Each of these photoreceptors contains two LOV (light oxygen and voltage) domains and a kinase domain. The LOV domains absorb blue light though an associated flavin mononucleotide chromophore, while the kinase domain is thought to be associated with signal transduction. The phototropins control not only chloroplast relocation movement, but also blue light-induced phototropic responses, leaf expansion and stomatal opening. Here I review the role of phototropin as a photoreceptor for chloroplast photorelocation movement.
authors.affiliation: Division of Biological Regulation and Photobiology, National Institute for Basic Biology, 38 Nishigonaka, Myoudaiji-cho, Okazaki 444-8585, Japan. kagawa@nibb.ac.jp
authors.forename: Takatoshi
authors.initials: T
authors.lastname: Kagawa
mesh_terms: D000595:Amino Acid Sequence; D001692:Biological Transport / Q000502:physiology / Q000528:radiation effects; D002736:Chloroplasts / Q000502:physiology / Q000528:radiation effects*; D056931:Cryptochromes; D029721:Drosophila Proteins; D005136:Eye Proteins; D005420:Flavoproteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D008027:Light; D008969:Molecular Sequence Data; D010100:Oxygen / Q000378:metabolism; D017956:Photoreceptor Cells, Invertebrate; D018524:Phototropism / Q000502:physiology*; D010802:Phylogeny; D010834:Phytochrome / Q000378:metabolism; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D043562:Receptors, G-Protein-Coupled; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction / Q000502:physiology / Q000528:radiation effects
chemical_list: D056931:Cryptochromes; D029721:Drosophila Proteins; D005136:Eye Proteins; D005420:Flavoproteins; D043562:Receptors, G-Protein-Coupled; C119828:cry protein, Drosophila; D010834:Phytochrome; D017346:Protein Serine-Threonine Kinases; D010100:Oxygen