Article
Sequence analysis of functional regions of homoserine dehydrogenase genes from L-lysine and L-threonine-producing mutants of Brevibacterium lactofermentum.
Bioscience, biotechnology, and biochemistry - 1 Oct 1997
Sugimoto M, Tanaka A, Suzuki T, Matsui H, Nakamori S, Takagi H
Abstract excerpt
The homoserine dehydrogenase (HD) genes from Brevibacterium lactofermentum lysine- and threonine-producing mutants were cloned, using the polymerase chain reaction, and sequenced. We found the amino acid substitutions, Val104Ile in the lysine-producing mutants in which HD may cause leaky mutation and Ser393Phe in the threonine-producing mutant with feedback-insensitive HD.
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