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    Mol Cell Biol. 1989 Jun;9(6):2724-7.

    Transformation of NIH 3T3 fibroblasts by an activated form of p59hck.

    Source

    Howard Hughes Medical Institute, University of Washington, Seattle 98195.

    Abstract

    Phosphorylation of a tyrosine residue near the carboxy terminus of src-family protein tyrosine kinases is believed to regulate the biological activity of these gene products. Conversion of this tyrosine in p59hck (Tyr-501) to a phenylalanine residue by using oligonucleotide-directed mutagenesis yielded a product (p59hckF501) with very potent transforming activity. Quantitative analysis by a soft-agar cloning assay revealed that p59hckF501 was more than 100-fold more effective than a closely related transforming element, p56lckF505, in colony formation. Cells bearing p59hckF501 had increased levels of protein phosphotyrosine. The ability of p59hckF501 to transform NIH 3T3 cells was abolished by a second mutation believed to destroy the ATP-binding domain.

    PMID:
    2503711
    [PubMed - indexed for MEDLINE]
    PMCID: PMC362345
    Free PMC Article

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