%0 Journal Article
%T Improved Production of L-lysine by Over-expression of Meso-diaminopimelate Decarboxylase Enzyme of Corynebacterium glutamicum in Escherichia coli
%A S. Cheraghi
%A A. Akbarzade
%A A. Farhangi
%A M. Chiani
%J Pakistan Journal of Biological Sciences
%D 2010
%I Asian Network for Scientific Information
%X The aim of this study is over-expression of Meso-diaminopimelate decarboxylase enzyme (EC 4.1.1.20) and enhancement of L-lysine production rate. The C. glutamicum LysA gene which encodes a Meso-diaminopimelate decarboxylase was cloned in E. coli. The cloned gene was sequenced; it encodes a 445 amino acids protein with molecular weight of 47 kD. Expression of the LysA gene in E. coli resulted in an increase in Meso-diaminopimelate decarboxylase activity, correlated with the presence in sodium dodecyl sulfate-polyacrylamid gels of a clear protein band that corresponds to this enzyme. The induction of cloned gene by IPTG has been shown to have an inhibitory effect on cell growth due to over-expression of the cloned gene. A two fold increase in lysine production rate was observed after introduction of the cloned gene into E. coli.
%K L-lysine
%K diaminopimelate decarboxylase
%K LysA gene
%K C. glutamicum
%U http://docsdrive.com/pdfs/ansinet/pjbs/2010/504-508.pdf