The granulocyte colony-stimulating factor receptor (G-CSFR), also known as colony-stimulating factor 3 receptor (CSF3R) and CD114 (Cluster of Differentiation 114), is a type I transmembrane protein with an extracellular region comprised of an Ig-like domain, a cytokine receptor homologous domain, and 3 fibronectin type III domains. It is a cell-surface receptor for the granulocyte colony-stimulating factor (G-CSF). G-CSFR belongs to a family of cytokine receptors known as the hematopoietin receptor family. It is expressed on neutrophil precursors, mature neutrophils, myeloid leukemias, and placenta. It mediates G-CSF-induced myeloid cell differentiation. Mutations in the intracellular part of this receptor are associated with certain types of leukemia.
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