. "Catalysis of the reaction: O3-acetyl-L-serine + uracil = 3-(uracil-1-yl)-L-alanine + acetate." . . "uracilylalanine synthase activity" . "3-O-acetyl-L-serine:uracil 1-(2-amino-2-carboxyethyl)transferase activity" . "isowillardiine synthase activity" . "O(3)-acetyl-L-serine acetate-lyase (adding uracil) activity" . "O3-acetyl-L-serine acetate-lyase (adding uracil)" . "O3-acetyl-L-serine:uracil 1-(2-amino-2-carboxyethyl)transferase activity" . "Willardiine synthase activity" . .