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Experientia. 1996 May 15;52(5):449-54.

Conservation, evolution, and specificity in cellular control by protein phosphorylation.

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University of Konstanz, Faculty of Biology, Germany.


The glycolytic control enzyme phosphofructokinase from the parasitic nematode Ascaris lumbricoides is regulated by reversible phosphorylation. The enzyme is phosphorylated by an atypical cyclic adenosine monophosphate (cAMP)-dependent protein kinase whose substrate specificity deviates from that of the mammalian protein kinase. This variation is explained by structural peculiarities on the surface part of the catalytic groove of the protein kinase. Also, the protein phosphatases responsible for the reversal of phosphorylation appear to act specifically in glycolysis and are different from those participating in regulation of glycogenolysis.

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