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Mapping of the phosphorylase kinase alpha subunit gene on the mouse X chromosome.

Authors:
Barnard PJ, Derry JM, Ryder-Cook AS, Zander NF, Kilimann MW
Affiliation:
Journal:
Cytogenetics and cell genetics

Abstract

Phosphorylase kinase is a glycogenolytic enzyme in several animal tissues. Within the last few years all four subunits of the enzyme have been cloned. The beta, gamma, and delta subunits are known to be autosomal. We have mapped the alpha subunit of phosphorylase kinase, recently cloned by Zander et al. (1988), in an interspecific mouse pedigree and localized it on the X chromosome, where it maps between the X-linked zinc finger protein and phosphoglycerate kinase genes, close to the latter. In man and mouse several X-linked disorders of this enzyme have been described. Although the X-linked phosphorylase kinase deficiency in mice may be caused by a mutation in the structural gene for the alpha subunit, mapped here, the existence of a separate regulatory locus, important in the normal expression or function of the enzyme in muscle, still remains a possibility.

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