The action mechanisms of plant cryptochromes.

The action mechanisms of plant cryptochromes.
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DOI:
10.1016/j.tplants.2011.09.002
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发表时间:
2011-12
影响因子:
20.5
通讯作者:
Lin, Chentao
Lin, Chentao
中科院分区:
生物学1区
文献类型:
--
作者:
Liu, Hongtao;Liu, Bin;Zhao, Chenxi;Pepper, Michael;Lin, Chentao

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蓝光受体隐花色素介导植物的各种光反应。光激发的隐花色素分子经历许多生物物理和生物化学变化,包括电子转移、磷酸化和泛素化,导致构象变化以传播光信号。隐花色素信号转导的两种模式最近被发现,CIB(隐花色素相互作用的基本螺旋环螺旋1)依赖的转录调控和SPA 1/COP 1(PHYA的供应/组成光形态发生1)依赖的隐花色素调节蛋白水解。这两种隐花色素信号途径都依赖于隐花色素感光体与其信号蛋白之间的蓝光依赖性相互作用来调节基因表达变化以响应蓝光,从而改变植物的发育程序。
The blue light receptors cryptochromes mediate various light responses in plants. The photoexcited cryptochrome molecules undergo a number of biophysical and biochemical changes, including electron transfer, phosphorylation, and ubiquitination, resulting in conformational changes to propagate light signals. Two modes of cryptochrome signal transduction have been recently discovered, the CIB (cryptochrome-interacting basic-helix-loop-helix 1)-dependent CRY2 regulation of transcription and the SPA1/COP1 (SUPPRESSOR OF PHYA /CONSTITUTIVELY PHOTOMORPHOGENIC1)-dependent cryptochrome regulation of proteolysis. Both cryptochrome signaling pathways rely on blue light-dependent interactions between the cryptochrome photoreceptor and its signaling proteins to modulate gene expression changes in response to blue light, leading to altered developmental programs of plants.
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