著者 |
Makita Y, Suzuki S, Fushimi K, Shimada S, Suehisa A, Hirata M, Kuriyama T, Kurihara Y, Hamasaki H, Okubo-Kurihara E, Yoshitake K, Watanabe T, Sakuta M, Gojobori T, Sakami T, Narikawa R, Yamaguchi H, Kawachi M, Matsui M.
|
Abstract |
Photoreceptors are conserved in green algae to land plants and regulate various developmental stages. In the ocean, blue light penetrates deeper than red light, and blue-light sensing is key to adapting to marine environments. Here, a search for blue-light photoreceptors in the marine metagenome uncover a chimeric gene composed of a phytochrome and a cryptochrome (Dualchrome1, DUC1) in a prasinophyte, Pycnococcus provasolii. DUC1 detects light within the orange/far-red and blue spectra, and acts as a dual photoreceptor. Analyses of its genome reveal the possible mechanisms of light adaptation. Genes for the light-harvesting complex (LHC) are duplicated and transcriptionally regulated under monochromatic orange/blue light, suggesting P. provasolii has acquired environmental adaptability to a wide range of light spectra and intensities.
|