Defining the dynamics of self-assembled Fas-receptor activation

Fas-Fas-ligand, the most well investigated apoptotic signaling system, plays a pivotal role in several human diseases. Its signaling through multiple pathways; multiple, complex regulatory points; and recently described tendency to undergo ligand-independent self-assembly warrant a comprehensive understanding of its physiologically well controlled function. In this review, we attempt to develop such a perspective on the regulation of Fas signaling. The multistep Fas regulation model presented here should be helpful in devising effective interventions for conditions resulting from the dysregulation of Fas.