The invention relates to a process for producing L-lysine or
L-lysine-containing feed additives by fermentation, which comprises a)
expressing a polynucleotide coding for polypeptide having
LL-diaminopimelate aminotransferase activity in a bacterium excreting
L-lysine, and b) fermenting the resultant bacterium in a medium under
suitable conditions and allowing the resultant L-lysine to accumulate in
the fermentation broth.