DOK proteins are enzymatically inert adaptor or scaffolding proteins. They provide a docking platform for the assembly of multimolecular signaling complexes. DOK2 may modulate the cellular proliferation induced by IL-4, as well as IL-2 and IL-3. May be involved in modulating Bcr-Abl signaling. Attenuates EGF-stimulated MAP kinase activation. Interacts with phosphorylated RASGAP and EGFR. Interacts with RET and NCK. Interacts (via PH domain) with TEK/TIE2 (tyrosine phosphorylated). Highly expressed in spleen and lung. During embryonic liver development, expressed in the islands of cells, consistent with an expression in hematopoietic precursors. PTB domain mediates receptor interaction. On immunoreceptor stimulation, phosphorylated on C-terminal tyrosine residues. Phosphorylation on Tyr-351 is required for binding to the SH2 domain of NCK. Phosphorylation on both Tyr-276 and Tyr-304 is required for interaction with RASGAP. Phosphorylated on tyrosine residues by TEK/TIE2. Belongs to the DOK family. Type A subfamily.