ID 2.5.1.53 DE uracilylalanine synthase. AN isowillardiine synthase. AN O(3)-acetyl-L-serine acetate-lyase (adding uracil). AN willardiine synthase. CA O-acetyl-L-serine + uracil = 3-(uracil-1-yl)-L-alanine + acetate + H(+). CC -!- Both L-willardiine and L-isowillardiine are produced in the reaction. CC -!- Not identical with EC 2.5.1.47. CC -!- Formerly EC 4.2.99.16. //