title: Partial purification and characterization of acid phosphatase from sporulated oocysts of Eimeria tenella.
abstract: Acid phosphatase of Eimeria tenella oocysts (Peak II) was purified 77-fold with a recovery of 26% using protamine sulfate precipitation, DEAE-cellulose chromatography and Sephadex G-200 gel filtration. This enzyme occurs in multiple forms as indicated by two peaks which can be separated by DEAE-cellulose chromatography and polyacrylamide gel electrophoresis. The partially purified enzyme has optimal activity at pH 4.5. With p-nitrophenyl phosphate the Km and Vmax values for (Peak II) were 25 mM and 1.57 mumol/min/mg protein, respectively. The enzyme (Peak II) is strongly inhibited by Hg++, Cu++, iodoacetamide, fluoride and molybdate. Tartrate and other divalent metal ions have no effect on enzyme activity. The partially purified Peak II phosphatase is not a glycoprotein as it is not absorbed on concanavalin-A Sepharose and its treatment with bacterial neuraminidase does not alter its elution profile through DEAE cellulose.
authors: Department of Parasitology, College of Veterinary Medicine, University of Georgia, Athens 30602.
authors: A A
authors: AA
authors: Farooqui
authors: W L
authors: WL
authors: Hanson
mesh_terms: D000135:Acid Phosphatase / Q000302:isolation & purification*; D000818:Animals; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D004539:Eimeria / Q000201:enzymology*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D011479:Protamines; D013170:Spores / Q000201:enzymology; D013379:Substrate Specificity
chemical_list: D011479:Protamines; D000135:Acid Phosphatase