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Protein: FAK1_HUMAN

Focal adhesion kinase 1

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. Microtubule-induced dephosphorylation at Tyr- 397 is crucial for the induction of focal adhesion disassembly. Plays a potential role in oncogenic transformations resulting in increased kinase activity. CATALYTIC ACTIVITY: ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. more...

SUBUNIT: Interacts with CAS family members and with GIT1, SORBS1 and BCAR3. Interacts with RGNEF and SHB (By similarity). Interacts with TGFB1I1 and STEAP4. Interacts with ZFYVE21. Interacts with ESR1, PIK3R1 or PIK3R2 and SRC. Interacts with EPHA2 (inactive form); participates to EPHA2 downstream signaling. Interacts with CD4; this interaction requires the presence of HIV-1 gp120.

SUBCELLULAR LOCATION: Cell junction, focal adhesion. Cell membrane; Peripheral membrane protein; Cytoplasmic side. Note=Constituent of focal adhesions.

ALTERNATIVE PRODUCTS: Event=Alternative splicing; Named isoforms=4; Name=1; IsoId=Q05397-1; Sequence=Displayed; Name=2; IsoId=Q05397-2; Sequence=VSP_004967, VSP_004968, VSP_004969, VSP_004970; Note=Phosphorylated on Tyr-688; Name=3; IsoId=Q05397-3; Sequence=VSP_004967, VSP_004968, VSP_004969, VSP_004973, VSP_004974; Name=4; IsoId=Q05397-4; Sequence=VSP_004967, VSP_004968, VSP_004969, VSP_004971, VSP_004972;

TISSUE SPECIFICITY: Expressed in all organs tested, in lymphoid cell lines, but most abundantly in brain.

DOMAIN: The first Pro-rich domain interacts with the SH3 domain of CRK-associated substrate (BCAR1) and CASL (By similarity).

DOMAIN: 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. FER promotes phosphorylation at Tyr-577, Tyr-861 and Tyr-925, even when cells are not adherent. Tyr-397, Tyr-576 and Ser-722 are phosphorylated only when cells are adherent. Microtubule-induced dephosphorylation at Tyr-397 could be catalyzed by PTPN11 and regulated by ZFYVE21. Dephosphorylated by PTPN11 upon EPHA2 activation by its ligand EFNA1.

SIMILARITY: Belongs to the protein kinase superfamily. Tyr protein kinase family. FAK subfamily.

SIMILARITY: Contains 1 FERM domain.

SIMILARITY: Contains 1 protein kinase domain.

GENE SYNONYMS: FAK FAK1.

COPYRIGHT: Protein annotation is derived from the UniProt Consortium (http://www.uniprot.org/). Distributed under the Creative Commons Attribution-NoDerivs License.

 

Organism:

  • Homo sapiens

Gene Symbol:

  • PTK2

Synonyms:

  • FADK 1
  • Protein-tyrosine kinase 2
  • 2.7.10.2
  • pp125FAK

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