Factor B structure provides insights into activation of the central protease of the complement system.
Milder, F.J., Gomes, L., Schouten, A., Janssen, B.J., Huizinga, E.G., Romijn, R.A., Hemrika, W., Roos, A., Daha, M.R., Gros, P.(2007) Nat Struct Mol Biol 14: 224-228
- PubMed: 17310251 
- DOI: 10.1038/nsmb1210
- Primary Citation of Related Structures:  
2OK5 - PubMed Abstract: 
Factor B is the central protease of the complement system of immune defense. Here, we present the crystal structure of human factor B at 2.3-A resolution, which reveals how the five-domain proenzyme is kept securely inactive. The canonical activation helix of the Von Willebrand factor A (VWA) domain is displaced by a helix from the preceding domain linker ...