PYGL Antibody – Rabbit Polyclonal

This gene encodes a homodimeric protein that catalyses the cleavage of alpha-1,4-glucosidic bonds to release glucose-1-phosphate from liver glycogen stores. This protein switches from inactive phosphorylase B to active phosphorylase A by phosphorylation of serine residue 15. Activity of this enzyme is further regulated by multiple allosteric effectors and hormonal controls. Humans have three glycogen phosphorylase genes that encode distinct isozymes that are primarily expressed in liver, brain and muscle, respectively. The liver isozyme serves the glycemic demands of the body in general while the brain and muscle isozymes supply just those tissues. In glycogen storage disease type VI, also known as Hers disease, mutations in liver glycogen phosphorylase inhibit the conversion of glycogen to glucose and results in moderate hypoglycemia, mild ketosis, growth retardation and hepatomegaly. Alternative splicing results in multiple transcript variants encoding different isoforms.[provided by RefSeq, Feb 2011]

PYGL: 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. Defects in PYGL are the cause of glycogen storage disease type 6 (GSD6). A metabolic disorder characterized by mild to moderate hypoglycemia, mild ketosis, growth retardation, and prominent hepatomegaly. Heart and skeletal muscle are not affected. Belongs to the glycogen phosphorylase family.

Protein type: EC 2.4.1.1; Transferase; Carbohydrate Metabolism - starch and sucrose

Chromosomal Location of Human Ortholog: 14q21-q22

Cellular Component: cytoplasm; plasma membrane; cytosol

Molecular Function: glycogen phosphorylase activity; protein homodimerization activity; bile acid binding; purine binding; drug binding; vitamin binding; ATP binding; glucose binding; AMP binding; pyridoxal phosphate binding

Biological Process: glycogen metabolic process; glycogen catabolic process; carbohydrate metabolic process; 5-phosphoribose 1-diphosphate biosynthetic process; glucose metabolic process; pathogenesis; glucose homeostasis

Disease: Glycogen Storage Disease Vi