title: The inhibitory effect of metals and other ions on acid phosphatase activity from Vigna aconitifolia seeds.
abstract: Sensitivity of acid phosphatase from Vigna aconitifolia seeds to metal ions, fluoride, and phosphate was examined. All the effectors had different degree of inhibitory effect on the enzyme. Among metal ions, molybdate and ferric ion were observed to be most potent inhibitors and both exhibited mixed type of inhibition. Acid phosphatase activity was inhibited by Cu2+ in a noncompetitive manner. Zn and Mn showed mild inhibition on the enzyme activity. Inhibition kinetics analysis explored molybdate as a potent inhibitor for acid phosphatase in comparison with other effectors used in this study. Fluoride was the next most strong inhibitor for the enzyme activity, and caused a mixed type of inhibition. Phosphate inhibited the enzyme competitively, which demonstrates that inhibition due to phosphate is one of the regulatory factors for enzyme activity.
authors.affiliation: a Department of Biochemistry, Faculty of Science , Banaras Hindu University , Varanasi , India.
authors.forename: Pramod Kumar
authors.initials: PK
authors.lastname: Srivastava
authors.forename: Asha
authors.initials: A
authors.lastname: Anand
mesh_terms: D000135:Acid Phosphatase / Q000037:antagonists & inhibitors* / Q000378:metabolism*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D007887:Fabaceae / Q000201:enzymology*; D005459:Fluorides / Q000494:pharmacology; D007477:Ions; D007700:Kinetics; D008670:Metals / Q000494:pharmacology*; D008982:Molybdenum / Q000494:pharmacology; D010710:Phosphates / Q000494:pharmacology; D012639:Seeds / Q000201:enzymology
chemical_list: D004791:Enzyme Inhibitors; D007477:Ions; D008670:Metals; D010710:Phosphates; C044659:molybdate; D008982:Molybdenum; D000135:Acid Phosphatase; D005459:Fluorides
keywords: Vigna aconitifolia; acid phosphatase; fluoride; inhibition; molybdate; phosphate