Download MendeleyStructure of DDB1 in complex with a paramyxovirus V protein: viral hijack of a propeller cluster in ubiquitin ligase.
Li, T., Chen, X., Garbutt, K.C., Zhou, P., Zheng, N.(2006) Cell 124: 105-117
- PubMed: 16413485
- DOI: https://doi.org/10.1016/j.cell.2005.10.033
- Primary Citation of Related Structures:
2B5L, 2B5M, 2B5N - PubMed Abstract:
The DDB1-Cul4A ubiquitin ligase complex promotes protein ubiquitination in diverse cellular functions and is reprogrammed by the V proteins of paramyxoviruses to degrade STATs and block interferon signaling. Here we report the crystal structures of DDB1 alone and in complex with the simian virus 5 V protein. The DDB1 structure reveals an intertwined three-propeller cluster, which contains two tightly coupled beta propellers with a large pocket in between and a third beta propeller flexibly attached on the side. The rigid double-propeller fold of DDB1 is targeted by the viral V protein, which inserts an entire helix into the double-propeller pocket, whereas the third propeller domain docks DDB1 to the N terminus of the Cul4A scaffold. Together, these results not only provide structural insights into how the virus hijacks the DDB1-Cul4A ubiquitin ligase but also establish a structural framework for understanding the multiple functions of DDB1 in the uniquely assembled cullin-RING E3 machinery.
Organizational Affiliation:
Department of Pharmacology, University of Washington, Seattle, WA 98195, USA.
