Enables glycogen phosphorylase activity. Involved in glycogen catabolic process. Located in extracellular exosome. Implicated in glycogen storage disease V.
RGD Description
This gene encodes a muscle enzyme involved in glycogenolysis. Highly similar enzymes encoded by different genes are found in liver and brain. Mutations in this gene are associated with McArdle disease (myophosphorylase deficiency), a glycogen storage disease of muscle. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Sep 2009]