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  • Title: Identification of nuclear substrates of the cyclic AMP-dependent protein kinase in Dictyostelium discoideum.
    Author: Chambers TC, Song-Nichols J, Campbell DS, Spitz E, Leichtling BH, Rickenberg HV.
    Journal: Cell Differ; 1987 Apr; 20(4):217-30. PubMed ID: 3581172.
    Abstract:
    A search for nuclear substrates of the cAMP-dependent protein kinase (cAMP-d PK) of Dictyostelium discoideum led to the identification of several such proteins. Identification was based initially on increased phosphorylation of the proteins in nuclear extracts catalyzed by added cAMP-d PK. One protein of Mr 38,000 was phosphorylated also in intact nuclei and in vivo; the amount of phosphoprotein or the level of phosphorylation increased during development. Both the Mr 38,000 protein and another substrate of Mr 195,000 were found in the nuclei of prespore and prestalk cells. Phosphorylation of other potential substrates of the cAMP-d PK was either prespore or prestalk cell-specific.
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