When the proapoptotic effector proteins BAX and BAK bind the BH3 domain of BID or BIM, they undergo conformational changes and oligomerization followed by insertion into the mitochondrial outer membranes, which leads to their permeabilization and, eventually, apoptosis. The NMR structure of the human BID BH3–BAK complex now provides structural insight into BAK activation.
- Tudor Moldoveanu
- Christy R Grace
- Douglas R Green