title: The effect of cations on the thermophilic character of alkaline phosphatase from Thermoactinomyces vulgaris.
abstract: The effect of cations on the thermophilic character of alkaline phosphatase from Thermoactinomyces vulgaris, is described. The optimal pH and temperature were 9.5 and 55 degrees C to 65 degrees C, respectively. The partial removal of cations with ethylene diamine tetraacetic acid converted the enzyme to mesophilic and susceptible to chemical denaturation. Their complete removal caused complete inhibition. The addition of 0.3mM cobalt and 10mM magnesium added before heating were found to be optimal for restoring its thermophilic character and its stability to a chemical denaturant.
authors: Dept. of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.
authors: D
authors: D
authors: Iny
authors: A
authors: A
authors: Pinsky
authors: H
authors: H
authors: Malovani
mesh_terms: D000469:Alkaline Phosphatase / Q000302:isolation & purification / Q000378:metabolism*; D002413:Cations, Divalent / Q000494:pharmacology*; D002846:Chromatography, Affinity; D004492:Edetic Acid / Q000494:pharmacology; D019791:Guanidine; D006146:Guanidines / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D008848:Micromonosporaceae / Q000187:drug effects / Q000201:enzymology*; D013696:Temperature
chemical_list: D002413:Cations, Divalent; D006146:Guanidines; D004492:Edetic Acid; D000469:Alkaline Phosphatase; D019791:Guanidine