FUNCTION: SwissProt: Q05397 # Non-receptor protein-tyrosine kinase implicated in signaling pathways involved in cell motility, proliferation and apoptosis. Activated by tyrosine-phosphorylation in response to either integrin clustering induced by cell adhesion or antibody cross-linking, or via G-protein coupled receptor (GPCR) occupancy by ligands such as bombesin or lysophosphatidic acid, or via LDL receptor occupancy. Plays a potential role in oncogenic transformations resulting in increased kinase activity.
SIZE: 1052 amino acids; 119233 Da
SUBUNIT: Interacts with CAS family members and with GIT1, SORBS1 and BCAR3. Interacts with SHB (By similarity). Interacts with TGFB1I1.
SUBCELLULAR LOCATION: Cell junction, focal adhesion; Cytoplasmic side. Note=Constituent of focal adhesions.
TISSUE SPECIFICITY: Expressed in all organs tested, in lymphoid cell lines, but most abundantly in brain.
DOMAIN: SwissProt: Q05397 The first Pro-rich domain interacts with the SH3 domain of CRK-associated substrate (BCAR1) and CASL (By similarity). & The carboxy-terminal region is the site of focal adhesion targeting (FAT) sequence which mediates the localization of FAK1 to focal adhesions.
PTM: Phosphorylated on 6 tyrosine residues upon activation.
SIMILARITY: Belongs to the protein kinase superfamily. Tyr protein kinase family. FAK subfamily. & Contains 1 FERM domain. & Contains 1 protein kinase domain.