| Title | Arabidopsis CULLIN4 forms an E3 ubiquitin ligase with RBX1 and the CDD complex in mediating light control of development |
| Authors | Chen, Haodong Shen, Yunping Tang, Xiaobo Yu, Lu Wang, Jia Guo, Lan Zhang, Yu Zhang, Huiyong Feng, Suhua Strickland, Elizabeth Zheng, Ning Deng, Xing Wang |
| Affiliation | Peking Univ, Coll Life Sci, Peking Yale Joint Ctr Plant Mol Genet & Agrobiote, Beijing 100871, Peoples R China. Natl Inst Biol Sci, Beijing 102206, Peoples R China. Yale Univ, Dept Mol Cellular & Dev Biol, New Haven, CT 06520 USA. Univ Washington, Dept Pharmacol, Seattle, WA 98195 USA. |
| Keywords | COP9 SIGNALOSOME INTERACTS SEEDLING DEVELOPMENT PLANT DEVELOPMENT GENE-EXPRESSION DNA-DAMAGE C-JUN PROTEIN PHOTOMORPHOGENESIS ENCODES DEGRADATION |
| Issue Date | 2006 |
| Publisher | plant cell |
| Citation | PLANT CELL.2006,18,(8),1991-2004. |
| Abstract | Repression of photomorphogenesis in Arabidopsis thaliana requires activity of the COP9 signalosome (CSN), CDD, and COP1 complexes, but how these three complexes work in concert to accomplish this important developmental switch has remained unknown. Here, we demonstrate that Arabidopsis CULLIN4 (CUL4) associates with the CDD complex and a common catalytic subunit to form an active E3 ubiquitin ligase both in vivo and in vitro. The partial loss of function of CUL4 resulted in a constitutive photomorphogenic phenotype with respect to morphogenesis and light-regulated gene expression. Furthermore, CUL4 exhibits a synergistic genetic interaction with COP10 and DET1. Therefore, this CUL4- based E3 ligase is essential for the repression of photomorphogenesis. This CUL4- based E3 ligase appears to associate physically with COP1 E3 ligase and positively regulates the COP1-dependent degradation of photomorphogenesis-promoting transcription factors, whereas the CSN controls the biochemical modification of CUL4 essential for E3 activity. Thus, this study suggests a biochemical activity connection between CSN and CDD complexes in their cooperation with COP1 in orchestrating the repression of photomorphogenesis. |
| URI | http://hdl.handle.net/20.500.11897/198774 |
| ISSN | 1040-4651 |
| DOI | 10.1105/tpc.106.043224 |
| Indexed | SCI(E) EI PubMed |
| Appears in Collections: | 生命科学学院 |
