Abstract
This communication provides biochemical, immunological, and genetic evidence that pp60src, the Rous sarcoma virus transforming gene product, is associated with glycerol kinase activity. Our investigations demonstrated that the compound phosphorylated by pp60src or by glycerol kinase (EC 2.7.1.30) from Candida mycoderma share the same electrophoretic and chromatographic mobilities. The glycerol kinase and protein kinase activities of pp60src were inhibited similarly by preincubation with immune IgG. Both activities were reduced 6-9-fold in pp60src preparations derived by immunoaffinity chromatography from cells which were infected with NY68, a temperature-sensitive transformation mutant of Rous sarcoma virus. The thermolability at 41 degrees C of the glycerol kinase activity of pp60src from the mutant virus-infected cells was greater (t/2 = 1.3 min) than the same activity in pp60src preparations from wild type virus-infected cells (t/2 = 4.8 min).
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