Catalysis of the reaction: 4-amino-4-deoxychorismate = 4-aminobenzoate + H+ + pyruvate.
Source:EC:4.1.3.38,
RHEA:16201
Comment
Note that the name 'para-amino benzoic acid synthase' was initially given to the 'aminodeoxychorismate synthase' activity before the additional 4-amino-4-deoxychorismate lyase activity was discovered. It is the lyase activity that actually produces para-aminobenzoic acid from 4-amino-4-deoxychorismate.