UDP-N-Acetylglucosamine 1-Carboxyvinyltransferase Activity
Phosphoenolpyruvate:UDP-2-Acetamido-2-Deoxy-D-Glucose 2-Enoyl-1-Carboxyethyltransferase Activity
Catalysis of the reaction: phosphoenolpyruvate + UDP-N-acetyl-alpha-D-glucosamine = phosphate + UDP-N-acetyl-3-O-(1-carboxyvinyl)-D-glucosamine.