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    Proc Natl Acad Sci U S A. 1991 Jun 1;88(11):4671-4.

    Steel-Dickie mutation encodes a c-kit ligand lacking transmembrane and cytoplasmic domains.

    Source

    Mammalian Genetics Laboratory, National Cancer Institute-Frederick Cancer Research and Development Center, MD 21702-1201.

    Abstract

    Mice homozygous for the viable Sl allele steel-Dickie (Sld) are sterile, severely anemic, and black-eyed white. The nature of the Sld mutation was investigated at the molecular level and was found to be due to a 4.0-kilobase intragenic deletion in mast cell growth factor (MGF) genomic sequences, providing conclusive evidence that Sl encodes MGF. As a consequence of this deletion, Sld is only capable of encoding a soluble truncated growth factor that lacks both transmembrane and cytoplasmic domains. Northern analysis indicates that Sld mRNA is expressed at approximately wild-type levels in adult tissues, and yeast expression studies suggest that the Sld protein is as biologically active as wild-type soluble MGF. These studies provide a molecular basis for explaining the Sld phenotype, a description of a germ-line mutation in the transmembrane and cytoplasmic domains of a membrane-bound growth factor, and in vivo evidence for the importance of membrane-bound forms of growth factors in mammalian development.

    PMID:
    1711207
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC51727
    Free PMC Article

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