Metabolism of glucose 1,6-P2--II. Glucose 1,6-P2 phosphatase in pig muscle.
Most of the glucose 1,6-P2 phosphatase activity of pig skeletal muscle is present in the cytosolic fraction. Four peaks of glucose 1,6-P2 phosphatase activity are obtained when the cytosolic fraction from pig muscle is subjected to DE-cellulose chromatography. All the peaks hydrolyze other phosphocompounds in addition to glucose 1,6-P2. The glucose 1,6-P2 phosphatase activity of the main peak shows an optimal neutral pH. It is activated by divalent cations, Mg2+ being more effective than Mn2+. The addition of Ca2+ or EGTA does not affect the enzymatic activity. IMP does not possess any effect. It is concluded that this enzyme is different from the glucose 1,6-P2 phosphatases found in mouse brain cytosol and rat skeletal muscle.
D000818:Animals; D002852:Chromatography, Ion Exchange; D003600:Cytosol / Q000378:metabolism; D019298:Glucose-6-Phosphate / Q000031:analogs & derivatives*; D005958:Glucosephosphates / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D051379:Mice; D009132:Muscles / Q000378:metabolism*; D010744:Phosphoric Monoester Hydrolases / Q000302:isolation & purification / Q000378:metabolism*; D051381:Rats; D013045:Species Specificity; D013552:Swine / Q000378:metabolism
D005958:Glucosephosphates; D019298:Glucose-6-Phosphate; C016473:glucose-1,6-bisphosphate; C014818:glucose 1,6-diphosphate phosphatase; D010744:Phosphoric Monoester Hydrolases