Title : Effect of epidermal growth factor and 12-O-tetradecanoylphorbol-13-acetate on the phosphorylation of soluble acidic proteins in A431 epidermoid carcinoma cells.

Pub. Date : 1986 Aug

PMID : 3015383






6 Functional Relationships(s)
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Protein Name
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1 EGF or TPA induced a 4- to 6-fold increase in the phosphorylation of pp17 and a 2- to 4-fold increase in the phosphorylation of pp27, pp34, and pp80 within 15 min after treatment of subconfluent A431 cells. Tetradecanoylphorbol Acetate stathmin 1 Homo sapiens
2 Alkali treatment of the gels removed most of the incorporated [32P] phosphate from the phosphoproteins, including pp27, pp34, and pp80; however, the phosphoester bond in pp17 was stable to alkaline hydrolysis since there was no removal of [32P]phosphate from this protein. Phosphorus-32 stathmin 1 Homo sapiens
3 Alkali treatment of the gels removed most of the incorporated [32P] phosphate from the phosphoproteins, including pp27, pp34, and pp80; however, the phosphoester bond in pp17 was stable to alkaline hydrolysis since there was no removal of [32P]phosphate from this protein. Phosphates stathmin 1 Homo sapiens
4 Treatment of A431 cells with dibutyryl cyclic adenosine 3":5"-monophosphate (1 mM) also increased the phosphorylation of pp17, pp27, and pp34 but not of pp80. Bucladesine stathmin 1 Homo sapiens
5 Activation of endogenous calcium- and phospholipid-dependent protein kinase C in the cytosol of A431 cells in a cell-free system resulted in the enhanced phosphorylation of pp27, pp34, and pp80 but not of pp17 while exogenous addition of the catalytic subunit of cyclic adenosine 3":5"-monophosphate-dependent protein kinase to cytosol preparations resulted in the phosphorylation of pp17, pp27, and pp34, but not of pp80. Calcium stathmin 1 Homo sapiens
6 Activation of endogenous calcium- and phospholipid-dependent protein kinase C in the cytosol of A431 cells in a cell-free system resulted in the enhanced phosphorylation of pp27, pp34, and pp80 but not of pp17 while exogenous addition of the catalytic subunit of cyclic adenosine 3":5"-monophosphate-dependent protein kinase to cytosol preparations resulted in the phosphorylation of pp17, pp27, and pp34, but not of pp80. Calcium stathmin 1 Homo sapiens