NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene is a glycogen phosphorylase found predominantly in the brain. The encoded protein forms homodimers which can associate into homotetramers, the enzymatically active form of glycogen phosphorylase. The activity of this enzyme is positively regulated by AMP and negatively regulated by ATP, ADP, and glucose-6-phosphate. This enzyme catalyzes the rate-determining step in glycogen degradation. [provided by RefSeq, Jul 2008]
Uniprot Description
PYGB: Phosphorylase is an important allosteric enzyme in carbohydrate metabolism. Enzymes from different sources differ in their regulatory mechanisms and in their natural substrates. However, all known phosphorylases share catalytic and structural properties. Belongs to the glycogen phosphorylase family.
Protein type: EC 2.4.1.1; Phosphorylase; Carbohydrate Metabolism - starch and sucrose; Kinase, other; Transferase
Chromosomal Location of Human Ortholog: 20p11.21
Cellular Component: membrane; cytoplasm
Molecular Function: glycogen phosphorylase activity; pyridoxal phosphate binding
Biological Process: glycogen catabolic process; carbohydrate metabolic process; glucose metabolic process; pathogenesis