Glycogen Phosphorylase

An enzyme that catalyzes the degradation of GLYCOGEN in animals by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond. This enzyme exists in two forms: an active phosphorylated form ( PHOSPHORYLASE A) and an inactive un-phosphorylated form (PHOSPHORYLASE B). Both a and b forms of phosphorylase exist as homodimers. In mammals, the major isozymes of glycogen phosphorylase are found in muscle, liver and brain tissue.

Year introduced: 2002

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Tree Number(s): D08.811.913.400.450.460.400.186

MeSH Unique ID: D024981

Registry Number: EC 2.4.1.-

Entry Terms:

• Phosphorylase, Glycogen
• Phosphorylase ab

Previous Indexing:

• Glucosyltransferases (1965-1971)
• Phosphorylases (1972-2001)

All MeSH Categories
Chemicals and Drugs Category
Enzymes and Coenzymes
Enzymes
Transferases
Glycosyltransferases
Hexosyltransferases
Glucosyltransferases
Phosphorylases
Glycogen Phosphorylase
Glycogen Phosphorylase, Brain Form
Glycogen Phosphorylase, Liver Form
Glycogen Phosphorylase, Muscle Form