Regulation of gene expression by light
Regulation of gene expression by light
复制标题
DOI：
10.1387/ijdb.051973jc
复制
发表时间：
2005-01-01
影响因子：
0.7
通讯作者：
Yanovsky, MJ
中科院分区：
文献类型：
--
作者：
Casal, JJ;Yanovsky, MJ
光信号主要由光敏色素和隐花色素感知，通过驱动转录组的剧烈变化来调节植物的生长和发育。早期的光响应基因包括大部分不同DNA结合基序的转录因子。在基因座编码几个转录调节因子，包括那些表现出快速变化的转录水平的突变，损害拟南芥对光的反应。涉及E3连接酶COP 1的蛋白酶体介导的降解提供了转录因子水平的额外控制层。一些转录调节子由光、昼夜节律和/或激素信号传导回路共享，从而创建交互地整合环境和内源性线索的复杂网络。
Light signals perceived mainly by phytochromes and cryptochromes regulate plant growth and development by driving dramatic shifts of the transcriptome. Early light-responsive genes include a large proportion of transcripton factors of different DNA binding motifs. Mutations at loci encoding several transcriptional regulators, including some of those showing rapid changes in transcript levels, impair responses to light in Arabidopsis thaliana. Proteasome-mediated degradation involving the E3 ligase COP1 provides an additional layer of control of the levels of transcription factors. Some transcriptional regulators are shared by light, circadian and/or hormonal signalling circuits creating complex networks that interactively integrate environmental and endogenous cues.