Process for the production of ortho-aminobenzoic acid and/or aniline from fermentable substrate using recombinant yeast

A method for producing o-aminobenzoic acid comprising the steps of

• a) fermenting at least one fermentable substrate in a fermentation vessel using a recombinant yeast cell comprising a knock out of the trp4 gene encoding anthranilate phosphoribosyltransferase and having no anthranilate phosphoribosyl transferase activity capable of converting the at least one fermentable substrate into o-aminobenzoic acid, wherein the fermentation in method step a) is performed at a pH between 2.0 and 5.0;
• and
• wherein said recombinant yeast cell produces more o-aminobenzoic acid than the wild type;
• and
• b) separating the produced o-aminobenzoic acid from the fermentation broth.