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The induction of 2-amino-Delta(2)-thiazoline-4-carboxylic acid hydrolase (ATCase) and N-carbamoylcysteine amidohydrolase (NCCase), both of which are involved in the conversion step of 2-amino-Delta(2)-thiazoline carboxylic acid (ATC) to cysteine, was studied with Pseudomonas putida AJ3865. We found that L-ATC induced L-ATCase and L-NCCase, but that D-ATC induced only L-NCCase, whereas L- or D-NCC and thiazoline derivatives did not induce both enzymes. The bacterium showed neither D-ATCase nor D-NCCase activities, indicating that the role of L-ATC and D-ATC was different in the enzyme induction. We also found new inducers, d- and l-methionine, S-methyl-L-cysteine, cysteic acid, and 2-aminoethane sulfonic acid. However, the induction level of both enzymes by new inducers was much lower than those by L-ATC and D-ATC. Furthermore, the induction rate of both enzymes was synergistically increased only under a combination of D,L-ATC and new inducers. S-Compounds, however, such as new inducers except S-methyl-L-cysteine, inhibited both enzyme activities. This is the first report on the new inducers, synergistic induction, and the new inhibitors of L-ATCase and L-NCCase.

journal of general and applied microbiology

Induction of 2-amino-.DELTA.2-thiazoline-4-carboxylic acid hydrolase and N-carbamoyl-L-cysteine amidohydrolase by S-compounds in Pseudomonas putida AJ3865.