A coryneform L-glutamate producing bacterium deficient in alpha -ketoglutaric dehydrogenase activity; a process for producing L-glutamic acid by using the bacterium; a gene coding for an enzyme having an alpha -KGDH activity originating in the coryneform L-glutamate producing bacterium; a recombinant DNA containing the above gene; a coryneform bacterium holding the above DNA; and a process for producing L-lysine by using an L-lysine producing bacterium holding the recombinant DNA. <IMAGE>
