Fc epsilon RI as a paradigm for a lipid raft-dependent receptor in hematopoietic cells

Lipid domains or rafts are currently embraced by immunologists as critical participants in receptor-mediated signaling events occurring at the plasma membrane. This view of membrane heterogeneity and its functional importance is supported by many years of different experimental approaches. We can no w refine our investigations, moving beyond the simple models to ask more de tailed questions about structural properties and mechanistic interactions. As highlighted for the IgE receptor (Fc epsilon RI), new information about initial engagement with scr family kinases, cytoskeletal regulation, and co upling with downstream signaling is beginning to emerge.