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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kasahara, Masahiro Kiyosue, Tomohiro Fukamatsu, Yosuke Ogura, Yasunobu Kikuyama, Munehiro Takahashi, Fumio Yamagata, Daisuke Ishikawa, Mié Wada, Masamitsu Kataoka, Hironao |
| Description | Author Affiliation: Takahashi F ( Division of Biological Regulation and Photobiology, National Institute for Basic Biology, Okazaki 444-8585, Japan.); |
| Abstract | A blue light (BL) receptor was discovered in stramenopile algae Vaucheria frigida (Xanthophyceae) and Fucus distichus (Phaeophyceae). Two homologs were identified in Vaucheria; each has one basic region/leucine zipper (bZIP) domain and one light-oxygen-voltage (LOV)-sensing domain. We named these chromoproteins AUREOCHROMEs (AUREO1 and AUREO2). AUREO1 binds flavin mononucleotide via its LOV domain and forms a 390-nm-absorbing form, indicative of formation of a cysteinyl adduct to the C(4a) carbon of the flavin mononucleotide upon BL irradiation. The adduct decays to the ground state in approximately 5 min. Its bZIP domain binds the target sequence TGACGT. The AUREO1 target binding was strongly enhanced by BL treatment, implying that AUREO1 functions as a BL-regulated transcription factor. The function of AUREO1 as photoreceptor for BL-induced branching is elucidated through RNAi experiments. RNAi of AUREO2 unexpectedly induces sex organ primordia instead of branches, implicating AUREO2 as a subswitch to initiate development of a branch, but not a sex organ. AUREO sequences are also found in the genome of the marine diatom Thalassiosira pseudonana (Bacillariophyceae), but are not present in green plants. AUREOCHROME therefore represents a BL receptor in photosynthetic stramenopiles. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 49 |
| Volume Number | 104 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2007-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Diatoms Growth & Development Fucus Morphogenesis Phaeophyta Photoreceptor Cells Physiology Amino Acid Sequence Genetics Gene Expression Regulation Molecular Sequence Data Chemistry Drug Effects Protein Structure, Tertiary RNA Interference Transcription, Genetic Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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