Crystal structure of the tetrameric Mad1-Mad2 core complex: implications of a 'safety belt' binding mechanism for the spindle checkpoint.
Sironi, L., Mapelli, M., Knapp, S., De Antoni, A., Jeang, K.T., Musacchio, A.(2002) EMBO J 21: 2496-2506
- PubMed: 12006501 
- DOI: 10.1093/emboj/21.10.2496
- Primary Citation of Related Structures:  
1GO4 - PubMed Abstract: 
The spindle checkpoint protein Mad1 recruits Mad2 to unattached kinetochores and is essential for Mad2-Cdc20 complex formation in vivo but not in vitro. The crystal structure of the Mad1-Mad2 complex reveals an asymmetric tetramer, with elongated Mad1 monomers parting from a coiled-coil to form two connected sub-complexes with Mad2 ...