Signaling mechanisms of plant cryptochromes in Arabidopsis thaliana

文献类型： 外文期刊

第一作者： Liu, Bobin

作者： Liu, Bobin;Yang, Zhaohe;Oka, Yoshito;Liu, Bobin;Gomez, Adam;Liu, Bin;Lin, Chentao

作者机构：

关键词： Cryptochrome;De-etiolation;Flowering;Photomorphogenesis;Transcription

期刊名称：JOURNAL OF PLANT RESEARCH （ 影响因子：2.629； 五年影响因子：2.926 ）

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收录情况： SCI

摘要： Cryptochromes (CRY) are flavoproteins that direct a diverse array of developmental processes in response to blue light in plants. Conformational changes in CRY are induced by the absorption of photons and result in the propagation of light signals to downstream components. In Arabidopsis, CRY1 and CRY2 serve both distinct and partially overlapping functions in regulating photomorphogenic responses and photoperiodic flowering. For example, both CRY1 and CRY2 regulate the abundance of transcription factors by directly reversing the activity of E3 ubiquitin ligase on CONSTITUTIVE PHOTOMORPHOGENIC 1 and SUPPRESSOR OF PHYA-105 1 complexes in a blue light-dependent manner. CRY2 also specifically governs a photoperiodic flowering mechanism by directly interacting with a transcription factor called CRYPTOCHROME-INTERACTING BASIC-HELIX-LOOP-HELIX. Recently, structure/function analysis of CRY1 revealed that the CONSTITUTIVE PHOTOMORPHOGENIC 1 independent pathway is also involved in CRY1-mediated inhibition of hypocotyl elongation. CRY1 and CRY2 thus not only share a common pathway but also relay light signals through distinct pathways, which may lead to altered developmental programs in plants.

分类号： Q94

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