Nonribosomal peptide synthase involved in the synthesis of nidulanin A and derived compounds (PubMed:23248299). Nidulanin A is a tetracyclopeptide with the sequence L-Phe-L-Kyn-L-Val-D-Val and an isoprene unit N-linked to the amino group of L-kynurenine (PubMed:23248299). The NRPS nlsA is responsible of the synthesis of the cyclopeptide and the prenyltransferase nptA adds the isoprene unit on the L-kynurenine residue of nidulanin A (PubMed:23248299). Further modifications lead to additional oxygenated related compounds (PubMed:23248299). dimethylallyl diphosphate + L-tryptophan = 4-(3-methylbut-2-enyl)-L-tryptophan + diphosphate Secondary metabolite biosynthesis. Homodimer. Accumulates the unprenylated precursor of nidulanin A, but none of the three prenylated forms, including nidulanin A and two oxygenated related compounds (PubMed:23248299). Belongs to the tryptophan dimethylallyltransferase family.