申请人:DOI HIDETAKA
公开号:US20100190217A1
公开(公告)日:2010-07-29
L-Lysine is produced by culturing in a medium an
Escherichia coli
having an L-lysine-producing ability, which has been modified to decrease the activity or activities of one or more enzymes of the meso-α,ε-diaminopimelic acid synthesis pathway, for example, 2,3,4,5-tetrahydropyridine-2,6-dicarboxylate N-succinyltransferase, succinyldiaminopimelate transaminase, succinyldiaminopimelate desuccinylase, and diaminopimelate epimerase, and into which a gene coding for diaminopimelate dehydrogenase has been introduced, and collecting L-lysine from the medium.
L-赖氨酸是通过在培养基中培养具有L-赖氨酸生产能力的大肠杆菌生产的,该菌株已经被改造以降低中间体α,ε-二氨基戊二酸合成途径中一个或多个酶的活性,例如2,3,4,5-四氢吡啶-2,6-二羧酸N-琥珀酰转移酶、琥珀酰二氨基戊二酸转氨酶、琥珀酰二氨基戊二酸脱琥珀酰酶和二氨基戊二酸表异构酶,并且引入一个编码二氨基戊二酸脱氢酶的基因,从培养基中收集L-赖氨酸。