Signaling adapter that couples activated growth factor receptors to signaling pathways. Participates in a signaling cascade initiated by activated KIT and KITLG/SCF. Participates in signaling downstream of the angiopoietin receptor TEK/TIE2, and plays a role in the regulation of endothelial cell migration and sprouting angiogenesis (By similarity). Interacts with CPNE3; this interaction may mediate the binding of CPNE3 with ERBB2 (By similarity). Interacts with the NPXY motif of tyrosine-phosphorylated IGF1R and INSR in vitro via the PID domain. Once activated, binds to GRB2. Interacts with tyrosine-phosphorylated CD3T and DDR2. Interacts with the N-terminal region of APS. Interacts with phosphorylated LRP1 and IRS4. Interacts with INPP5D/SHIP1 and INPPL1/SHIP2. Interacts with ALK, GAB2, GRB7 and KIT. Interacts with PTPN6/SHP (tyrosine phosphorylated). Identified in a complex containing FGFR4, NCAM1, CDH2, PLCG1, FRS2A, SRC, SHC1, GAP43 and CTTN. Interacts with EPHB1 and GRB2; activates the MAPK/ERK cascade to regulate cell migration. Interacts with PDGFRB (tyrosine-phosphorylated). Interacts with ERBB4. Interacts with TEK/TIE2 (tyrosine-phosphorylated). Interacts with PTK2/FAK1 (By similarity). Interacts with FLT4 (tyrosine-phosphorylated). Interacts with the Trk receptors NTRK1, NTRK2 and NTRK3; in a phosphotyrosine-dependent manner. Interacts with CEACAM1; this interaction is CEACAM1-phosphorylation-dependent and mediates interaction with EGFR or INSR resulting in decrease coupling of SHC1 to the MAPK3/ERK1-MAPK1/ERK2 pathway (By similarity) (PubMed:11694516). Interacts (via PID domain) with PEAK1 (when phosphorylated) (By similarity). Found in a complex with PPP1CA, PPP1CC, SHC1 and PEAK1 (By similarity). Phosphorylated by activated epidermal growth factor receptor. Phosphorylated in response to KIT signaling. Tyrosine phosphorylated in response to FLT3 signaling and by ligand-activated ALK. Tyrosine phosphorylated by TEK/TIE2 (By similarity). Tyrosine phosphorylated by ligand-activated PDGFRB (By similarity). May be tyrosine phosphorylated by activated PTK2/FAK1 (By similarity). Dephosphorylation by PTPN2 may regulate interaction with GRB2 (By similarity). Phosphorylated in response to FLT4 signaling. Tyrosine phosphorylated by activated PTK2B/PYK2.