Translational control by protein kinase in Artemia salina and wheat germ

Sierra, J. M. ; de Haro, C. ; Datta, A. ; Ochoa, S. (1977) Translational control by protein kinase in Artemia salina and wheat germ Proceedings of the National Academy of Sciences of the United States of America, 74 (10). pp. 4356-4359. ISSN 0027-8424

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The catalytic subunit of cyclic 3':5'-AMP-dependent protein kinase (ATP:protein phosphotransferase, EC inhibits translation in Artemia salina and wheat germ extracts. It acts, as in reticulocyte lysates [Datta, A., de Haro, C., Sierra, J. M. & Ochoa, S. (1977) Proc. Natl. Acad. Sci. USA 74, 1463-1467] by catalyzing the conversion of a proinhibitor to an inhibitor of polypeptide chain initiation. Addition of ATP and either cyclic AMP or catalytic subunit promotes the proinhibitor-inhibitor conversion in crude proinhibitor preparations from A. salina embryos. The effect of cyclic AMP is due to stimulation of cyclic AMP-dependent protein kinase, present in such preparations, and is inhibited by hemin. In similar preparations from wheat germ, addition of ATP and catalytic subunit promoted proinhibitor-inhibitor conversion, but addition of ATP and cyclic AMP has little or no effect. As assayed with histone as substrate, wheat germ preparations exhibit a protein kinase activity that is not stimulated by the addition of cyclic AMP or cyclic GMP. Our results suggest that a translational control system, similar to that existing in rabbit reticulocytes and other mammalian cells, is present in organisms evolutionarily far removed from mammals.

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Source:Copyright of this article belongs to National Academy of Sciences, USA.
ID Code:9324
Deposited On:02 Nov 2010 12:29
Last Modified:16 May 2016 19:09

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