Rat Docking Protein 1 (DOK1) Protein

Background

Docking protein 1 (DOK1) serves as an adaptor protein involved in cellular signaling pathways, particularly those linked to tyrosine kinase receptors and cytokine receptors. DOK1 lacks intrinsic enzymatic activity but facilitates signal transduction by linking membrane-bound receptors to downstream effectors. It plays a critical role in regulating cell proliferation, differentiation, and apoptosis by acting as a negative regulator of mitogenic signaling pathways. DOK1 is highly expressed in hematopoietic cells and is instrumental in immune responses. Dysregulation of DOK1 has been implicated in oncogenesis, particularly in hematologic malignancies, where it acts as a tumor suppressor by inhibiting excessive cellular proliferation and survival signals. Its interactions with Ras-GAP and other signaling molecules underline its importance in maintaining cellular homeostasis.