Identification and properties of distinct sucrose and glucose phosphotransferase enzyme II activities in Streptococcus mutans 6715g.
We investigated phosphoenolpyruvate-dependent phosphotransferase system enzyme II activities for sucrose and glucose in Streptococcus mutans 6715g. Two integral membrane proteins, enzyme IIscr and enzyme IIglc, each specific for its sugar substrate, sucrose or glucose, were identified by their abilities to catalyze specific sugar:sugar-phosphate exchange reactions. Some of the properties of these two transport proteins are also presented.
D002462:Cell Membrane / Q000201:enzymology; D005947:Glucose / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D010731:Phosphoenolpyruvate Sugar Phosphotransferase System / Q000378:metabolism*; D013295:Streptococcus mutans / Q000201:enzymology*; D013379:Substrate Specificity; D013395:Sucrose / Q000378:metabolism*
D013395:Sucrose; D010731:Phosphoenolpyruvate Sugar Phosphotransferase System; D005947:Glucose