Aspartokinase III coding DNA, recombined DNA, micro-organism and the method for manufacturing L-lysines and L-treonines by fermentation

摘要

A process for producing an L-amino acid at good efficiency through fermentation is provided. Means For Solution A DNA encoding aspartokinase III derived from bacteria of the genus Escherichia and having mutation by which feedback inhibition with L-lysine is released is introduced into cells to form transformant bacteria of the genus Escherichia, and these bacteria are incubated in an appropriate culture medium. An L-amino acid is produced and accumulated in the culture, and collected from this culture.