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. 1975 Sep 25;250(18):7415-9.

Partial purification and properties of guanosine 3':5'-monophosphate-dependent protein kinase from pig lung

  • PMID: 170261
Free article

Partial purification and properties of guanosine 3':5'-monophosphate-dependent protein kinase from pig lung

K Nakazawa et al. J Biol Chem. .
Free article

Abstract

Guanosine 3':5'-monophosphate(cyclic GMP)-dependent protein kinase which catalyzes the phosphorylation of histone was purified about 200-fold from the soluble fraction of pig lung by pH 5.5 precipitation, DEAE-cellulose column chromatography, and Sephadex G-200 gel filtration. The apparent Ka values for guanosine 3':5'-monophosphate and adenosine 3':5'-monophosphate were determined to be about 17 and 360 nM, respectively. Mg2+ was essential for the activity exhibiting biphasic stimulation behavior and neither Mn2+ nor Ca2+ could substitute for Mg2+. However, these divalent ions markedly inhibited the protein kinase activity stimulated by cyclic GMP in the presence of Mg2+.

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