2.6.1.16 additional information - development of an assay for glucosamine 6-phosphate synthase that measures the production of glucosamine 6-phosphate by either following the consumption of acetyl-CoA spectrophotometrically at 230 nm or quantifying the free thiol with 5,5'-dithio-bis(2-nitrobenzoic acid), i.e. Ellman’s reagent in a discontinuous manner. Simple assay method, which can be adapted to 96-well microtiter plate format 684404 2.6.1.16 0.001 - mutant enzyme L468P 672444 2.6.1.16 0.0047 - - 639918 2.6.1.16 0.00783 - - 639921 2.6.1.16 0.013 - - 639905 2.6.1.16 0.0144 - - 639923 2.6.1.16 0.021 - glutamine 6-phosphate-synthetic activity, mutant V711F, pH 7.5, 25°C 671896 2.6.1.16 0.05 - glutamine 6-phosphate-synthetic activity, mutant W97G, pH 7.5, 25°C 671896 2.6.1.16 0.095 - amidohydrolysing activity of the mutant enzyme W97G using D-fructose 6-phosphate as substrate 671896 2.6.1.16 0.16 - - 639919 2.6.1.16 0.24 - - 639927 2.6.1.16 0.256 - amidohydrolysing activity of the mutant enzyme W97F using D-fructose 6-phosphate as substrate 671896 2.6.1.16 0.38 - mutant enzyme I271T 672444 2.6.1.16 0.38 - mutant enzyme I3T 672444 2.6.1.16 0.38 - mutant enzyme S449P 672444 2.6.1.16 0.39 - wild type enzyme 672444 2.6.1.16 0.42 - mutant enzyme A38T 672444 2.6.1.16 0.42 - mutant enzyme G471S 672444 2.6.1.16 0.631 - wild type enzyme, using D-fructose 6-phosphate as a substrate 676955 2.6.1.16 0.866 - - 639931 2.6.1.16 0.89 - amidohydrolysing activity of the wild type enzyme using D-fructose 6-phosphate as substrate 671896 2.6.1.16 0.94 - amidohydrolysing activity of the mutant enzyme V711F using D-fructose 6-phosphate as substrate 671896 2.6.1.16 1.2 - - 639911 2.6.1.16 1.2 - glutamine 6-phosphate-synthetic activity, mutant W97F, pH 7.5, 25°C 671896 2.6.1.16 3.5 - - 639913 2.6.1.16 3.6 - - 639911 2.6.1.16 4 - - 639911 2.6.1.16 4.66 - - 639918 2.6.1.16 4.93 - pH 7.0, 37°C 737920 2.6.1.16 7.63 - - 639922 2.6.1.16 8 - - 639911 2.6.1.16 12 - glutamine 6-phosphate-synthetic activity, wild-type, pH 7.5, 25°C 671896 2.6.1.16 34.8 - - 639925