Abstract
A simple and rapid assay method is described for determining the specific radioactivity of the gamma-phosphate group of 32P-labelled ATP. Labelled ATP is incubated with cyclic AMP, cyclic AMP-dependent protein kinase and histone H2A under conditions leading to maximum phosphorylation of the histone. The specific radioactivity of the gamma-phosphate group of the 32P-labelled ATP is calculated from the total amount of [32P]Pi incorporated into a standard amount of histone. This assay method uses inexpensive commercially available materials, and it yields an accurate specific radioactivity with as little as 0.25 nmol of 32P-labelled ATP.
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- Cogoli J. M., Dobson J. G., Jr An easy and rapid method for the measurement of [gamma-32P]ATP specific radioactivity in tissue extracts obtained from in vitro rat heart preparations labeled with 32Pi. Anal Biochem. 1981 Jan 15;110(2):331–337. doi: 10.1016/0003-2697(81)90199-8. [DOI] [PubMed] [Google Scholar]
- Corbin J. D., Reimann E. M. Assay of cyclic AMP-dependent protein kinases. Methods Enzymol. 1974;38:287–290. doi: 10.1016/0076-6879(74)38044-5. [DOI] [PubMed] [Google Scholar]
- England P. J., Walsh D. A. A rapid method for the measurement of [gamma-32P]ATP specific radioactivity in tissue extracts and its application to the study of 32Pi uptake in perfused rat heart. Anal Biochem. 1976 Oct;75(2):429–435. doi: 10.1016/0003-2697(76)90096-8. [DOI] [PubMed] [Google Scholar]
- Garrison J. C., Borland M. K., Florio V. A., Twible D. A. The role of calcium ion as a mediator of the effects of angiotensin II, catecholamines, and vasopressin on the phosphorylation and activity of enzymes in isolated hepatocytes. J Biol Chem. 1979 Aug 10;254(15):7147–7156. [PubMed] [Google Scholar]
- KREBS E. G., LOVE D. S., BRATVOLD G. E., TRAYSER K. A., MEYER W. L., FISCHER E. H. PURIFICATION AND PROPERTIES OF RABBIT SKELETAL MUSCLE PHOSPHORYLASE B KINASE. Biochemistry. 1964 Aug;3:1022–1033. doi: 10.1021/bi00896a003. [DOI] [PubMed] [Google Scholar]
- Kirk C. J., Michell R. H., Hems D. A. Phosphatidylinositol metabolism in rat hepatocytes stimulated by vasopressin. Biochem J. 1981 Jan 15;194(1):155–165. doi: 10.1042/bj1940155. [DOI] [PMC free article] [PubMed] [Google Scholar]