DOK proteins are enzymatically inert adaptor or scaffolding proteins. They provide a docking platform for the assembly of multimolecular signaling complexes. DOK1 appears to be a negative regulator of the insulin signaling pathway. Modulates integrin activation by competing with talin for the same binding site on ITGB3 (By similarity). Interacts with RasGAP, INPP5D/SHIP1 and ABL1. Interacts directly with phosphorylated ITGB3 (By similarity). Interacts with SRMS (via the SH2 and SH3 domains) (By similarity). Constitutively tyrosine-phosphorylated (By similarity). Phosphorylated by TEC. Phosphorylated by LYN (By similarity). Phosphorylated on tyrosine residues by the insulin receptor kinase. Results in the negative regulation of the insulin signaling pathway (By similarity). Phosphorylated on tyrosine residues by SRMS (By similarity). Belongs to the DOK family. Type A subfamily.