Signaling adapter that couples activated growth factor receptors to signaling pathways. 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). Participates in a signaling cascade initiated by activated KIT and KITLG/SCF. Isoform p47Shc and isoform p52Shc, once phosphorylated, couple activated receptor kinases to Ras via the recruitment of the GRB2/SOS complex and are implicated in the cytoplasmic propagation of mitogenic signals. Isoform p47Shc and isoform p52 may thus function as initiators of the Ras signaling cascade in various non-neuronal systems. Isoform p66Shc does not mediate Ras activation, but is involved in signal transduction pathways that regulate the cellular response to oxidative stress and life span. Isoform p66Shc acts as a downstream target of the tumor suppressor p53 and is indispensable for the ability of stress-activated p53 to induce elevation of intracellular oxidants, cytochrome c release and apoptosis. The expression of isoform p66Shc has been correlated with life span. 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 DDR2 and CD3T. Interacts with the N-terminal region of APS. Interacts with GRB7 and KIT (By similarity). Interacts with PTK2/FAK1 (By similarity). Interacts with phosphorylated LRP1 and IRS4. Interacts with FLT4 (tyrosine-phosphorylated) (By similarity). Interacts with PDGFRB (tyrosine-phosphorylated). Interacts with ERBB4 (By similarity). Interacts with TEK/TIE2 (tyrosine-phosphorylated) (By similarity). Interacts with ALK, GAB2, TRIM31, INPP5D/SHIP1 and INPPL1/SHIP2. Interacts with PTPN6/SHP (tyrosine phosphorylated). Identified in a complex containing FGFR4, NCAM1, CDH2, PLCG1, FRS2, SRC, SHC1, GAP43 and CTTN. Interacts with EPHB1 and GRB2; activates the MAPK/ERK cascade to regulate cell migration. 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:15467833). Interacts (via PID domain) with PEAK1 (when phosphorylated at 'Tyr-1177') (By similarity). Found in a complex with PPP1CA, PPP1CC, SHC1 and PEAK1 (By similarity). Targeting of isoform p47Shc to mitochondria is mediated by its first 32 amino acids, which behave as a bona fide mitochondrial targeting sequence. Isoform p52Shc and isoform p66Shc, that contain the same sequence but more internally located, display a different subcellular localization (By similarity). In case of oxidative conditions, phosphorylation at 'Ser-36' of isoform p66Shc, leads to mitochondrial accumulation. In human, it is alternative promoter usage that produces such isoforms. Widely expressed. Expressed in neural stem cells but absent in mature neurons. In response to a variety of growth factors, isoform p47Shc and isoform p52 bind to phosphorylated receptors through their phosphotyrosine binding (PID) and/or SH2 domains. The PID and SH2 domains bind to specific phosphorylated tyrosine residues in the Asn-Pro-Xaa-Tyr(P) motif. Isoform p47Shc and isoform p52Shc are in turn phosphorylated on three tyrosine residues within the extended proline-rich domain. These phosphotyrosines act as docking site for GRB2 and thereby are involved in Ras activation. Phosphorylated in response to FLT4 signaling (By similarity). Tyrosine phosphorylated by ligand-activated PDGFRB (By similarity). May be tyrosine phosphorylated by activated PTK2/FAK1 (By similarity). Tyrosine phosphorylated by TEK/TIE2 (By similarity). Tyrosine phosphorylated by activated PTK2B/PYK2 (By similarity). Dephosphorylation by PTPN2 may regulate interaction with GRB2 (By similarity). Phosphorylated by activated epidermal growth factor receptor. Phosphorylated in response to KIT signaling. Isoform p47Shc and isoform p52Shc are phosphorylated on tyrosine residues of the Pro-rich domain. Isoform p66Shc is phosphorylated on Ser-36 by PRKCB upon treatment with insulin, hydrogen peroxide or irradiation with ultraviolet light. FLT3 signaling promotes tyrosine phosphorylation of isoform p47Shc and isoform p52Shc. Also tyrosine phosphorylated by ligand-activated ALK. Produced by alternative splicing. Produced by alternative initiation at Met-46 of isoform p52.