Adapter protein involved in regulating diverse signal transduction pathways. Involved in the regulation of endocytosis and lysosomal degradation of ligand-induced receptor tyrosine kinases, including EGFR and MET/hepatocyte growth factor receptor, through a association with CBL and endophilins. The association with CBL, and thus the receptor internalization, may inhibited by an interaction with PDCD6IP and/or SPRY2. Involved in regulation of ligand-dependent endocytosis of the IgE receptor. Attenuates phosphatidylinositol 3-kinase activity by interaction with its regulatory subunit. May be involved in regulation of cell adhesion; promotes the interaction between TTK2B and PDCD6IP. May be involved in the regulation of cellular stress response via the MAPK pathways through its interaction with MAP3K4. Is involved in modulation of tumor necrosis factor mediated apoptosis. Can self-associate and form homotetramers. Interacts with CD2, F-actin capping protein, PIK3R3, GRB2, EGFR, MET, BLNK, MAP3K4, PDCD6IP, SPRY2, ARHGAP17, ARHGAP27, MAGI2, CRK, BCAR1, SOS1, ASAP1, ARAP3, HIP1R, SYNJ2, INPP5D and STAP1. Interacts with CBL and CBLB, but does not interact with CBLC. Two molecules of SH3KBP1 seem to bind through their respective SH3 1 domain to one molecule of CBLB. The interaction with CBL or CBLB and EGFR is increased upon EGF stimulation. The interaction with CBL is attenuated by PDCD6IP. Interacts through its proline-rich region with the SH3 domain of endophilins SH3GL1, SH3GL2 and SH3GL3. The SH3KBP1-endophilin complex seems to associate with a complex containing the phosphorylated receptor (EGFR or MET) and phosphorylated CBL. Probably associates with ASAP1 and phosphorylated EGFR. Probably part of a complex consisting of at least SH3KBP1, ASAP1 and ARAP3. Interacts with focal adhesion kinases PTK2 AND PTK2B, probably as a dimer. Interacts with DAB2 and probably associates with chathrin through its interaction with DAB2. Part of a complex consisting of SH3KBP1, DAB2, and clathrin heavy chain. DAB2 and clathrin dissociate from SH3KBP1 following growth factor treatment, enabling interaction with CBL. Interacts with DDN and probably associates with MAGI2 through its interaction with DDN. Interacts with the SH3 domains of SRC tyrosine-protein kinases SRC, LCK, LYN, FGR, FYN and HCK. Interacts with TRADD, BIRC2, TRAF1, TRAF2 and TNFR1, and the association with a TNFR1-associated complex upon stimulation with TNF-alpha seems to be mediated by SRC. Probably interacts with SH3KBP1. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Adaptor/scaffold; Apoptosis; Motility/polarity/chemotaxis