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Molecular genetics of phosphorylase kinase: cDNA cloning, chromosomal mapping and isoform structure
Author(s) -
Kilimann M. W.
Publication year - 1990
Publication title -
journal of inherited metabolic disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.462
H-Index - 102
eISSN - 1573-2665
pISSN - 0141-8955
DOI - 10.1007/bf01799500
Subject(s) - phosphorylase kinase , biology , microbiology and biotechnology , genetics , gene isoform , gene , complementary dna , glycogen phosphorylase , glycogen storage disease , protein subunit , biochemistry , enzyme , glycogen
Summary A deficiency in phosphorylase kinase is responsible for several forms of glycogen storage disease which differ in heredity and affected tissues. This is so because phosphorylase kinase consists of four different subunits and has multiple tissue‐specific isoforms. To elucidate the molecular basis of phosphorylase kinase deficiencies, the cDNAs encoding the subunits α and β were cloned and sequenced. Each subunit was shown to be encoded by a single gene. The α subunit gene was mapped to chromosome Xq12–q13 and the β subunit gene to chromosome 16q12–q13. Isoform cDNAs reveal differential mRNA splicing. Thus, the stage is set for the molecular characterization of the genes and their deficiency mutations.