Nitrilase that hydrolyzes preferentially phenylacetonitrile, (R,S)-mandelonitrile, and 3-indolylacetonitrile. a nitrile + 2 H2O = a carboxylate + NH4(+) 4-chlorophenylacetonitrile + 2 H2O = 4-chlorophenylacetate + NH4(+) Belongs to the carbon-nitrogen hydrolase superfamily. Nitrilase family.