1.1.1.169 A181L site-directed mutagenesis, the substitution displaces Ser239 and increases the Km for ketopantoate 844fold, without affecting kcat. The decrease in 2-dehydropantoate affinity enhances the already kinetically preferred NADPH binding path, making the random mechanism appear to be sequentially ordered and reducing the kinetic cooperativity 740065 1.1.1.169 A181L the substitution increases the Km of ketopantoate 844fold, without affecting the kcat value 740065 1.1.1.169 C84A site-directed mutagenesis -, 739822 1.1.1.169 C84A site-directed mutagenesis, crystal structure analysis, overview -, 741385 1.1.1.169 D248A site-directed mutagenesis, unaltered activity compared to the wild-type enzyme, functional complementation of a panE knockout mutant strain 667687 1.1.1.169 D248A site-directed mutagenesis, wild-type activity 286109 1.1.1.169 E210A site-directed mutagenesis, unaltered activity compared to the wild-type enzyme, functional complementation of a panE knockout mutant strain 667687 1.1.1.169 E210A site-directed mutagenesis, wild-type activity 286109 1.1.1.169 E240A site-directed mutagenesis, wild-type activity 286109 1.1.1.169 E256A site-directed mutagenesis, altered steady-state kinetics of the mutant compared to the wild-type enzyme, overview 687675 1.1.1.169 E256A site-directed mutagenesis, nearly inactive mutant, 2600fold decreased catalytic efficiency, no complementation of a panE knockout mutant strain 667687 1.1.1.169 E256A site-directed mutagenesis, significant reduction in catalytic efficiency of enzyme 286109 1.1.1.169 E256D wild-type activity 286109 1.1.1.169 K176A site-directed mutagenesis, altered steady-state kinetics of the mutant compared to the wild-type enzyme, overview 687675 1.1.1.169 K176A site-directed mutagenesis, nearly inactive mutant, 78000fold decreased catalytic efficiency, no complementation of a panE knockout mutant strain 667687 1.1.1.169 K176A site-directed mutagenesis, significant reduction in catalytic efficiency of enzyme 286109 1.1.1.169 K176A/E256A double mutant, no activity 286109 1.1.1.169 K176C wild-type activity 286109 1.1.1.169 K72A site-directed mutagenesis, altered steady-state kinetics of the mutant compared to the wild-type enzyme, overview 687675 1.1.1.169 K72A site-directed mutagenesis, unaltered activity compared to the wild-type enzyme, functional complementation of a panE knockout mutant strain 667687 1.1.1.169 K72A site-directed mutagenesis, wild-type activity 286109 1.1.1.169 additional information generation of a gene TK1968 disruption mutant -, 736827 1.1.1.169 additional information Lys176 acts as general acid in ketopantoate reduction and is involved in catalysis and ketopantoate binding, E256A functions in D-pantoate and ketopantoate binding in ketopantoate reductase 286109 1.1.1.169 additional information Lys176 and Glu256 important for binding ketopantoate and the catalytic mechanism 286110 1.1.1.169 N98A site-directed mutagenesis, altered steady-state kinetics of the mutant compared to the wild-type enzyme, overview 687675 1.1.1.169 N98A site-directed mutagenesis, nearly inactive mutant, 4000fold reduced catalytic efficiency, no complementation of a panE knockout mutant strain 667687 1.1.1.169 R31A site-directed mutagenesis, altered steady-state kinetics of the mutant compared to the wild-type enzyme, overview 687675 1.1.1.169 S244A site-directed mutagenesis, altered steady-state kinetics of the mutant compared to the wild-type enzyme, overview 687675 1.1.1.169 S244A site-directed mutagenesis, unaltered activity compared to the wild-type enzyme, functional complementation of a panE knockout mutant strain 667687 1.1.1.169 W129A site-directed mutagenesis -, 739822 1.1.1.169 Y60A site-directed mutagenesis -, 739822