期刊
PLANT SIGNALING & BEHAVIOR
卷 6, 期 4, 页码 483-490出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.6.4.14784
关键词
Arabidopsis; blue light; chloroplast velocity; coiled-coil region; organelle movement; phototropin; protein-protein interaction
资金
- Japanese Ministry of Education, Sports, Science and Technology (MEXT) [13139203, 17084006]
- Japan Society for Promotion of Science (JSPS) [13304061, 16107002, 20227001, 20870030]
- JSPS Research Fellowship for Young Scientists
- Grants-in-Aid for Scientific Research [20227001] Funding Source: KAKEN
To optimize photosynthetic activity, chloroplasts change their intracellular location in response to ambient light conditions; chloroplasts move toward low intensity light to maximize light capture and away from high intensity light to avoid photodamage. Although several proteins have been reported to be involved in chloroplast photorelocation movement response, any physical interaction among them was not found so far. We recently found a physical interaction between two plant-specific coiled-coil proteins, WE B1 (Weak Chloroplast Movement under Blue Light 1) and PMI2 (Plastid Movement Impaired 2), that were indentified to regulate chloroplast movement velocity. Since the both coiled-coil regions of WE B1 and PMI2 were classified into an uncharacterized protein family having DUF827 (DUF: Domain of Unknown Function) domain, it was the first report that DUF827 proteins could mediate protein-protein interaction. In this mini-review article, we discuss regarding molecular function of WE B1 and PMI2, and also define a novel protein family composed of WE B1, PMI2 and WE B1/PMI2-like proteins for protein-protein interaction in land plants.
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