|Quail, Peter - UCB/ARS PGEC|
Submitted to: Current Opinion in Cell Biology
Publication Type: Review Article
Publication Acceptance Date: March 11, 2002
Publication Date: April 1, 2002
Citation: Quail, P.H. 2002. Photosensory perception and signalling in plant cells: new paradigms? Current Opinion in Cell Biology 14(2):180-188. Technical Abstract: Plants monitor informational light signals using three sensory photoreceptor families: the phototropins, cryptochromes and phytochromes. Recent advances suggest that the phytochromes act transcriptionally by targeting light signals directly to photoresponsive promoters through binding to a transcriptional regulator. By contrast, the cryptochromes appear to act post-translationally, by disrupting extant proteosome-mediated degradation of a key transcriptional activator through direct binding to a putative E3 ubiquitin ligase, thereby elevating levels of the activator and consequently of target gene expression.