Aspartokinasegenvarianter

摘要

A transformant with an increased rate of L-lysine production and secretion is obtained by introducing into a corynebacterium a recombinant DNA that can be replicated in a corynebacterium and contains either a DNA fragment originating in a corynebacterium and coding for an aspartokinase alpha -subunit protein whereby a synergistic feedback inhibition by L-lysine and L-threonine is released or a DNA fragment originating in a corynebacterium and coding for an aspartokinase beta -subunit protein whereby a synergistic feedback inhibition by L-lysine and L-threonine is released. The obtained transformant is cultured in a suitable medium and the formed L-lysine is separated. $$