The purification and properties of N-acetylglucosamine 6-phosphate deacetylase from Escherichia coli.
1. N-Acetylglucosamine 6-phosphate deacetylase and 2-amino-2-deoxy-d-glucose 6-phosphate ketol-isomerase (deaminating) (EC 5.3.1.10, glucosamine 6-phosphate deaminase) of Escherichia coliK(12) have been separated by chromatography on DEAE-cellulose. 2. N-Acetylglucosamine 6-phosphate deacetylase has optimum pH8.5 and K(m) 0.8mm. Glucosamine 6-phosphate is a product of the reaction. There appear to be no essential cofactors. Glucosamine 6-phosphate and fructose 6-phosphate inhibit deacetylation. 3. Glucosamine 6-phosphate deaminase has optimum pH7.0 and K(m) 9.0mm. It is stimulated by N-acetylglucosamine 6-phosphate. 4. We propose that the deacetylase be termed 2-acetamido-2-deoxy-d-glucose 6-phosphate amidohydrolase (EC 3.5.1.-), with acetylglucosamine 6-phosphate deacetylase as a trivial name.
D002482:Cellulose; D011232:Chemical Precipitation; D002852:Chromatography, Ion Exchange; D004926:Escherichia coli / Q000201:enzymology*; D006863:Hydrogen-Ion Concentration; D007535:Isomerases / Q000032:analysis*; D007700:Kinetics; D008954:Models, Biological; D013268:Stimulation, Chemical
D002482:Cellulose; D007535:Isomerases