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Murine c-mpl: a member of the hematopoietic growth factor receptor superfamily that transduces a proliferative signal.

Skoda, R C and Seldin, D C and Chiang, M K and Peichel, Catherine L and Vogt, T F and Leder, P (1993) Murine c-mpl: a member of the hematopoietic growth factor receptor superfamily that transduces a proliferative signal. The EMBO journal, 12 (7). pp. 2645-53. ISSN 0261-4189

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The murine myeloproliferative leukemia virus has previously been shown to contain a fragment of the coding region of the c-mpl gene, a member of the cytokine receptor superfamily. We have isolated cDNA and genomic clones encoding murine c-mpl and localized the c-mpl gene to mouse chromosome 4. Since some members of this superfamily function by transducing a proliferative signal and since the putative ligand of mpl is unknown, we have generated a chimeric receptor to test the functional potential of mpl. The chimera consists of the extracellular domain of the human interleukin-4 receptor and the cytoplasmic domain of mpl. A mouse hematopoietic cell line transfected with this construct proliferates in response to human interleukin-4, thereby demonstrating that the cytoplasmic domain of mpl contains all elements necessary to transmit a growth stimulatory signal. In addition, we show that 25-40% of mpl mRNA found in the spleen corresponds to a novel truncated and potentially soluble isoform of mpl and that both full-length and truncated forms of mpl protein can be immunoprecipitated from lysates of transfected COS cells. Interestingly, however, although the truncated form of the receptor possesses a functional signal sequence and lacks a transmembrane domain, it is not detected in the culture media of transfected cells.

Item Type: Article or Abstract
Additional Information: Originally published in The EMBO Journal from Nature Publishing Group, the article is not available online at This article is available Open Access via PubMed Central at
PubMed ID: 8334987
PMCID: PMC413511
Keywords or MeSH Headings: Alternative Splicing; Amino Acid Sequence; Animals; Base Sequence; Cells, Cultured; Chromosome Mapping; Cloning, Molecular; DNA; Humans; Interleukin-4/metabolism; Mice; Mice, Inbred C57BL; Molecular Sequence Data; Multigene Family; Neoplasm Proteins; Proto-Oncogene Proteins/genetics/metabolism; RNA, Messenger/genetics; Receptors, Colony-Stimulating Factor/genetics/metabolism; Receptors, Cytokine; Receptors, Immunologic/genetics/metabolism; Receptors, Thrombopoietin; Signal Transduction;
Subjects: Cellular and Organismal Processes > Cell Physiology > Cell communication
Cellular and Organismal Processes > Cell Physiology > Cell proliferation
Molecules > Proteins > Receptors
Depositing User: Library Staff
Date Deposited: 16 Sep 2008 20:52
Last Modified: 21 May 2010 16:41

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