Αποτελέσματα Αναζήτησης
1 Ιουλ 2014 · The COP1/SPA complex of Arabidopsis is a well-characterized key negative regulator that actively suppresses the light signaling cascade in dark-grown plants by ubiquitinating transcription factors which mediate the various light responses.
16 Ιουν 2021 · Here the authors show that the SPA1 kinase regulates distinct thermomorphogenic responses according to tissue type by interactions with PIF4 and HY5 in shoots and roots, respectively.
23 Μαρ 2021 · Discovered originally in Arabidopsis thaliana, COP1 acts in a complex with SPA proteins as a central repressor of light-mediated responses in plants. By ubiquitinating and promoting the degradation of several substrates, COP1/SPA regulates many aspects of plant growth, development and metabolism.
16 Απρ 1999 · An Arabidopsis mutant, spa1, identified in a phyA suppressor screen is hypersensitive only to light signals perceived by phyA (7). Analyses suggest that SPA1 encodes a negatively acting factor that functions at an early step in phyA-specific signal transduction.
15 Αυγ 2006 · Here, we demonstrate that SPA proteins are, moreover, essential for photoperiodic flowering. Mutations in SPA1 cause phyA-independent early flowering under short day (SD) but not long day (LD) conditions, and this phenotype is enhanced by additional loss of SPA3 and SPA4 function.
17 Ιουλ 2003 · Suppressor of phyA-105 (SPA1) is a phytochrome A-specific signaling intermediate that acts as a light-dependent repressor of photomorphogenesis in Arabidopsis seedlings. SPA1 is part of a small gene...
1 Νοε 2003 · Here we report that COP1 acts as part of a large protein complex and interacts with SPA1 in a light-dependent manner. We further demonstrate the E3 ubiquitin ligase activity of COP1 on HY5 in vitro and the alteration of that activity by SPA1.
