Focal adhesion kinase (PTK2) (FAK)

Focal adhesion kinase (FAK), encoded by the PTK2 gene, is a non-receptor tyrosine kinase that plays a central role in integrating signals from the extracellular matrix and growth factors (UniProt P44059; NCBI Gene 5747). It localizes to focal adhesions, where it regulates fundamental cellular processes including adhesion, migration, proliferation, and survival (Lee et al., J Hematol Oncol, 2015). In the context of oncology, FAK is frequently overexpressed or activated, contributing to tumor progression, metastasis, and the development of a fibrotic tumor microenvironment that limits immune cell infiltration (Sulzmaier et al., Nat Rev Cancer, 2014). FAK inhibitors, primarily small molecules targeting its kinase domain, are being investigated as therapeutic agents, often in combination with chemotherapy or immune checkpoint inhibitors to overcome resistance and enhance efficacy (ClinicalTrials.gov, 2023). Beyond cancer, FAK is also implicated in fibrotic diseases and cardiovascular remodeling, making it a versatile therapeutic target (Lee et al., 2015).

Other names

PTK2Protein tyrosine kinase 2Focal adhesion kinase 1FADK 1pp125FAK

Small molecule inhibitors typically act as ATP-competitive inhibitors of the FAK kinase domain, preventing autophosphorylation at Tyr397 and the subsequent recruitment of signaling partners like Src (Sulzmaier et al., Nat Rev Cancer, 2014).