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Photooligomerization Determines Photosensitivity and Photoreactivity of Plant cryptochromes

Molecular Plant 2020年第3期13卷 398-413页

作者： Qing Liu Tiantian Su Wenjin He Huibo Ren Siyuan Liu Yadi Chen Lin Gao Xiaohua Hu Haoyue Lu Shijiang Cao Ying Huang Xu Wang Qin Wang Chentao Lin Basic Forestry and Proteomics Research Center UCLA-FAFU Joint Research Center on Plant ProteomicsCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou 350002China Department of Molecular Cell&Developmental BiologyUniversity of CaliforniaLos AngelesCA 90095USA College of Life Sciences Fujian Normal UniversityFuzhou 350108China College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002China These authors contributed equally to this article.

Plant and non-plant species possess cryptochrome(CRY)photoreceptors to mediate blue light regulation of development or the circadian *** blue light-dependent homooligomerization of Arabidopsis CRY2 is a known early photoreaction necessary for its functions,but the photobiochemistry and function of light-dependent homooligomerization and heterooligomerization of cryptochromes,collectively referred to as CRY photooligomerization,have not been well ***,we show that photooligomerization is an evolutionarily conserved photoreaction characteristic of CRY photoreceptors in plants and some non-plant *** analyses of the kinetics of the forward and reverse reactions of photooligomerization of Arabidopsis CRY1 and CRY2 provide a previously unrecognized mechanism underlying the different photosensitivity and photoreactivity of these two closely related *** found that photooligomerization is necessary but not sufficient for the functions of CRY2,implying that CRY photooligomerization is presumably accompanied by additional function-empowering conformational *** further demonstrated that the CRY2-CRY1 heterooligomerization plays roles in regulating functions of Arabidopsis CRYs in *** together,these results suggest that photooligomerization is an evolutionarily conserved mechanism determining the photosensitivity and photoreactivity of plant CRYs.

关键词： light signaling photomorphogenesis cryptochrome,oligomerization

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