Higher plants use LOV to perceive blue light

Abstract

contrast, light-regulated complex formation between ZTL and GI appears to limit the capacity of ZTL to degrade its targets, which are part of the circadian oscillator.

Physical interaction between VIVID and white collar complex regulates photoadaptation inNeurospora

“…For instance, LOV domains from phototropins and FKF1 in Arabidopsis are still able to sense blue light when incorporated in Neurospora photoreceptor proteins (49). Interestingly, phototropins (PHOT1 and PHOT2) in Arabidopsis are also involved in sensing and responding to changes of light intensity (50), but their subcellular localization on light activation is complex. A small fraction of PHOT1 is released to the cytoplasm from the plasma membrane (40), whereas PHOT2 becomes associated with the Golgi apparatus (39,41).…”

Lysine 206 inArabidopsisphytochrome A is the major site for ubiquitin-dependent protein degradation

“…Light provides energy for photosynthesis as well as modulates many developmental processes in plants (1,2). Plants are very sensitive to changes in light conditions because they have several classes of photoreceptors such as red and far-red light-absorbing phytochromes (3), blue/ultraviolet A (UVA) light-absorbing cryptochromes, phototropins, members of the Zeitlupe family (4,5) and ultraviolet B (UVB) light-absorbing UV resistance eight proteins (6).…”

A reverse genetics approach identifies novel mutants in light responses and anthocyanin metabolism in petunia

“…Arabidopsis is the sole plant species for which the full set of photoreceptor genes has been characterized (Demarsy and Fankhauser 2009;Inoue et al 2010;Nagatani 2010;Chaves et al 2011). In Solanaceae, photoperception and light signaling have been mainly investigated in tomato, tobacco and potato (Perrotta et al 2000;Weller et al 2001;Fernández et al 2005;Rutitzky et al 2009).…”

“…In higher plants, it is perceived by a complex system of photoreceptor molecules: the blue (B) and ultraviolet-A (UV-A) light sensing cryptochromes (cry) (Chaves et al 2011) and phototropins (phot) (Inoue et al 2010) and the red (R)/far red (FR) phytochrome (phy) receptors (Nagatani 2010). More recently, a novel family of B photoreceptors has been described in Arabidopsis thaliana : the Zeitlupe (ZTL)/ Flavin-binding Kelch repeat F-box protein (FKF1)/LOV Kelch Protein (LKP2) family (Demarsy and Fankhauser 2009). Upon light perception, photoreceptor-mediated signal transduction involves a wide-range of mechanisms that include lightregulated sub-cellular localization of the photoreceptor molecules (Fankhauser and Chen 2008), a large reorganization of transcriptional programs (Casal and Yanovsky 2005) and light-regulated proteolytic degradation of photoreceptors and signaling components ).…”