CCK4 may function as a cell adhesion molecule. Although it belongs to the insulin receptor subfamily of the Tyr protein kinases, it likely lacks the catalytic activity of a tyrosine kinase. It may be connected to the pathophysiology of colon carcinomas and/or may represent a tumor progression marker. This Type I membrane protein is highly expressed in lung, liver, pancreas, kidney, placenta and melanocytes, but weakly expressed in thyroid gland, ovary, brain, heart and skeletal muscle, and not in colon. It is also expressed in erythroleukemia cells.
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Protein Aliases: CCK-4; Colon carcinoma kinase 4; Inactive tyrosine-protein kinase 7; Protein chuzhoi; Protein-tyrosine kinase 7; Pseudo tyrosine kinase receptor 7; PTK7 protein tyrosine kinase 7; receptor tyrosine kinase-like protein; serum response factor; Tyrosine-protein kinase-like 7
Gene Aliases: 8430404F20Rik; CCK-4; CCK4; chz; mPTK7/CCK4; PTK7; Srf
Molecular Function: transmembrane signal receptor