Enzymes Responsible for the Conversion of N^α‐[(Benzyloxy)carbonyl]‐D‐lysine to N^α‐[(Benzyloxy)carbonyl]‐D‐aminoadipic Acid by Rhodococcus sp. AIU Z‐35‐1

Abstract

The enzymes responsible for the conversion of N(alpha)-[(benzyloxy)carbonyl]-D-lysine (N(alpha)-Z-D-lysine) to N(alpha)-Z-D-aminoadipic acid (N(alpha)-Z-D-AAA) by Rhodococcus sp. AIU Z-35-1 were identified. N(alpha)-Z-D-Lysine was first converted to N(alpha)-Z-D-aminoadipic delta-semialdehyde (N(alpha)-Z-D-AASA) by D-specific amino acid deaminase, whereas N(alpha)-Z-L-lysine was converted to N(alpha)-Z-L-AASA by L-specific amino acid oxidase. The resulting N(alpha)-Z-D-AASA was then converted to N(alpha)-Z-D-AAA by the same aldehyde dehydrogenase that is responsible for N(alpha)-Z-L-AASA oxidation. The product amount of the D-specific amino acid deaminase reached the maximum at one day of cultivation in the L-lysine medium. The aldehyde dehydrogenase reached the maximum at three days of cultivation.