Figure 1.
Schematic representation of the Erk-Elk (green) and calcineurin-NFAT (blue) sensor modules in thymocytes. Plain arrows indicate activation, dashed arrows nuclear import. The membrane-proximal signaling event that lead to PLCγ 1 activation are not depicted. Active PLCγ 1 releases inositol triphosphate and diacyl glycerol, which cause calcium release from intra-cellular stores (and the ensuing opening of plasma membrane CRAC channels) and activation of Ras via the exchange factor RasGRP1 [157,158], respectively.