Phosphorylase kinase (PhK) is a large hexadecameric complex that catalyzes the phosphorylation and activation of glycogen phosphorylase (GP). It consists in four copies each of a catalytic subunit (gamma) and three regulatory subunits (alpha beta delta). Delta corresponds to endogenous calmodulin, whereas little is known on the molecular architecture of the large alpha and beta subunits, which probably arose from gene duplication. Here, using sensitive methods of sequence analysis, we show th...Expand abstract
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Calcineurin B-like domains in the large regulatory alpha/beta subunits of phosphorylase kinase.
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