Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. ,Domain:The carboxy-terminal region is the site of focal adhesion targeting (FAT) sequence which mediates the localization of FAK1 to focal adhesions. ,Domain:The first Pro-rich domain interacts with the SH3 domain of CRK-associated substrate (BCAR1) and CASL. ,Function: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. ,PTM:Phosphorylated on 6 tyrosine residues upon activation. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. FAK subfamily. ,similarity:Contains 1 FERM domain. ,similarity:Contains 1 protein kinase domain. ,subcellular location:Constituent of focal adhesions. ,subunit:Interacts with CAS family members and with GIT1 , SORBS1 and BCAR3. Interacts with RGNEF and SHB (By similarity) . Interacts with TGFB1I1. ,tissue specificity:Expressed in all organs tested , in lymphoid cell lines , but most abundantly in brain. ,
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