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Title: RPT2/NCH1 subfamily of NPH3-like proteins is essential for the chloroplast accumulation response in land plants
Authors: Suetsugu, Noriyuki  kyouindb  KAKEN_id
Takemiya, Atsushi
Kong, Sam-Geun
Higa, Takeshi
Komatsu, Aino
Shimazaki, Ken-ichiro
Kohchi, Takayuki  kyouindb  KAKEN_id  orcid (unconfirmed)
Wada, Masamitsu
Author's alias: 末次, 憲之
武宮, 淳史
孔, 三根
比嘉, 毅
小松, 愛乃
島崎, 研一郎
河内, 孝之
和田, 正三
Keywords: Arabidopsis
blue light
chloroplast movement
Issue Date: 30-Aug-2016
Publisher: National Academy of Sciences
Journal title: Proceedings of the National Academy of Sciences of the United States of America
Volume: 113
Issue: 37
Abstract: In green plants, the blue light receptor kinase phototropin mediates various photomovements and developmental responses, such as phototropism, chloroplast photorelocation movements (accumulation and avoidance), stomatal opening, and leaf flattening, which facilitate photosynthesis. In Arabidopsis, two phototropins (phot1 and phot2) redundantly mediate these responses. Two phototropin-interacting proteins, NONPHOTOTROPIC HYPOCOTYL 3 (NPH3) and ROOT PHOTOTROPISM 2 (RPT2), which belong to the NPH3/RPT2-like (NRL) family of BTB (broad complex, tramtrack, and bric à brac) domain proteins, mediate phototropism and leaf flattening. However, the roles of NRL proteins in chloroplast photorelocation movement remain to be determined. Here, we show that another phototropin-interacting NRL protein, NRL PROTEIN FOR CHLOROPLAST MOVEMENT 1 (NCH1), and RPT2 redundantly mediate the chloroplast accumulation response but not the avoidance response. NPH3, RPT2, and NCH1 are not involved in the chloroplast avoidance response or stomatal opening. In the liverwort Marchantia polymorpha, the NCH1 ortholog, MpNCH1, is essential for the chloroplast accumulation response but not the avoidance response, indicating that the regulation of the phototropin-mediated chloroplast accumulation response by RPT2/NCH1 is conserved in land plants. Thus, the NRL protein combination could determine the specificity of diverse phototropin-mediated responses.
Description: 葉緑体が光に集まる反応を制御する新たな因子の発見. 京都大学プレスリリース. 2016-08-30.
Rights: Copyright © 2016 National Academy of Sciences.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1073/pnas.1602151113
PubMed ID: 27578868
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