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  • Title: Alternative forms of the human G-CSF receptor function in growth signal transduction.
    Author: Ziegler SF, Davis T, Schneringer JA, Franklin TL, Tough TW, Teepe M, Larsen A, Williams DE, Smith CA.
    Journal: New Biol; 1991 Dec; 3(12):1242-8. PubMed ID: 1725961.
    Abstract:
    Two forms of the human granulocyte colony-stimulating factor (G-CSF) receptor (HuG-CSFR), differing only at the carboxyl terminus, were recently identified by cDNA cloning. In this report we show that transfection and subsequent expression of either cDNA clone in the interleukin-3 (IL-3)-dependent murine cell line BAF/BO3 converts the cells to G-CSF-responsiveness. The transfected cells bound HuG-CSF in a manner indistinguishable from the native receptors. Expression of a mutant form of the HuG-CSFR, with a deletion in the cytoplasmic domain, in BAF/BO3 cells failed to convert the cells to HuG-CSF-responsiveness. In a similar manner, expression of these two HuG-CSFRs in the interleukin-6 (IL-6)-dependent murine hybridoma B9 resulted in the ability of these cells to grow in HuG-CSF [corrected]. These results strongly suggest that sequences in the first 96 amino acids of the cytoplasmic domain of the HuG-CSFR are required for signal transduction in response to ligand binding.
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