Domain:A serine-rich region promotes activation of the serum response element (SRE) . ,Domain:Contains a central domain (substrate domain) containing multiple potential SH2-binding sites and a C-terminal domain containing a divergent helix-loop-helix (HLH) motif. The SH2-binding sites putatively bind CRK , NCK and ABL SH2 domains. The HLH motif is absolutely required for the induction of pseudohyphal growth in yeast and mediates heterodimerization with CASL. ,Domain:The SH3 domain is necessary for the localization of the protein to focal adhesions and interacts with one proline-rich region of focal adhesion kinase 1. ,Function:Docking protein which plays a central coordinating role for tyrosine-kinase-based signaling related to cell adhesion. Implicated in induction of cell migration. Overexpression confers antiestrogen resistance on breast cancer cells. ,PTM:Focal adhesion kinase 1 phosphorylates the protein at the YDYVHL motif. SRC-family kinases are recruited to the phosphorylated sites and can phosphorylate other tyrosine residues. Tyrosine phosphorylation is triggered by integrin mediated adhesion of cells to the extracellular matrix. ,similarity:Belongs to the CAS family. ,similarity:Contains 1 SH3 domain. ,subcellular location:Unphosphorylated form localizes in the cytoplasm and can move to the membrane upon tyrosine phosphorylation. ,subunit:Forms complexes in vivo with focal adhesion kinase 1 , adapter protein CRKL and LYN kinase. Can heterodimerize with CASL. Interacts with BCAR3 , NPHP1 , PTK2B and SH2D3C (By similarity) . Interacts with activated CSPG4. Interacts with INPPL1/SHIP2. ,tissue specificity:Widely expressed with an abundant expression in the testis. Low level of expression seen in the liver , thymus , and peripheral blood leukocytes. The protein has been detected in a B-cell line. ,
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