Probably involved in auxin production. TAA1, TAR1 and TAR2 are required for proper embryo patterning. 2-oxoglutarate + L-tryptophan = indole-3-pyruvate + L-glutamate L-tryptophan + pyruvate = indole-3-pyruvate + L-alanine Inhibited by L-kynurenine. Plant hormone metabolism; auxin biosynthesis. Very low expression in seedlings. Slightly up-regulated by ethylene. No visible phenotype. Belongs to the alliinase family. Truncated N-terminus.