title: Photometrical analysis with photosensory domains of photoreceptors in green algae.
abstract: Chloroplast photoorientation in the green alga Mougeotia scalaris is controlled by blue and red light. The properties of the LOV domains of phototropin A and B were consistent with previous data of action spectra and photoreceptor lifetime for blue light-mediated photoorientation. The LOV domains of the neochromes did not bind flavin, while the domains of neochrome 2 contributed to multimer formation. The absorption spectra of the neochrome phytochrome photosensory domain with phytochromobilin were very similar to the action spectra for red light-induced photoorientation. These results indicate that phototropin and neochrome work as the blue and red photoreceptors involved in photoorientation.
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Japan. kagawa@agbi.tsukuba.ac.jp
authors.forename: Takatoshi
authors.initials: T
authors.lastname: Kagawa
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Suetsugu
mesh_terms: D020418:Algal Proteins / Q000737:chemistry* / Q000235:genetics; D000460:Chlorophyta / Q000737:chemistry* / Q000235:genetics; D056931:Cryptochromes; D005420:Flavoproteins / Q000737:chemistry / Q000235:genetics; D010777:Photochemistry; D020283:Photoreceptors, Microbial / Q000737:chemistry* / Q000235:genetics; D017434:Protein Structure, Tertiary; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics; D013053:Spectrophotometry; D024341:Xanthophylls / Q000737:chemistry / Q000235:genetics
chemical_list: D020418:Algal Proteins; D056931:Cryptochromes; D005420:Flavoproteins; D020283:Photoreceptors, Microbial; D011994:Recombinant Proteins; D024341:Xanthophylls; C492072:neochrome