+ SRC@Cytoplasm → RTK*:SRC@Plasma Membrane References
In addition to Grb2/SOS PLCG and SRC are also recruited to activated PTKRs at the PM.
Activation of the TCR results in tyrosine phosphorylation of the ?? chain of the receptor by Src family kinases and the resulting phosphotyrosines serve to recruit ZAP-70 (not modelled) that in turn phosphorylates the scaffold protein LAT (not modelled) at multiple sites.
Recruitment to the membrane and tyrosine phosphorylation enhance the enzymatic activity of PLC-g leading to the formation of two second messengers diacylglycerol (DAG) and inositol 145-trisphosphate (IP3). IP3 releases Ca2+ from internal stores which in turn acts in concert with DAG to translocate protein kinase C (PKC) to the cell membrane and stimulate its enzymatic activity.
PMID:19615955 PMID:16488589 PMID:15567848