Function
The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Most of these members are cell-surface proteins that are characterized by the presence of four hydrophobic domains. The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility. This encoded protein is a cell surface antigen and is highly expressed in different carcinomas. [6]
Marker gene for alveolar epithelial progenitors
TM4SF1 has been identified as a marker of Wnt-responsive alveolar epithelial progenitor cells, and a marker of alveolar repair in injured regions of the lungs. [7] It has also been found hypomethylated and upregulated in asthma, with potential prognostic value (AUROC: 0.769). [8]
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