L-lysine-producing corynebacteria and process for the preparation of lysine.

摘要

New L-lysine producing coryneform bacteria (A) contain amplified pyc (pyruvate carboxylase) and dapA (dihydrodipicolinate) genes, where the promoter of the dapA gene contains the mutation MC20 or MA16 (as shown in respective sequences of 79 or 80 bases given in the specification as SEQ-ID-NO: 5 and SEQ-ID-NO: 6). (A) optionally also contains amplified lycC, lysE and/or dapB gene(s). An independent claim is included for the preparation of L-lysine by fermentation of coryneform bacteria having an amplified pyc gene, where the bacteria additionally contain the amplified dapA gene as specified for (A).