Bacterial expression of superoxide dismutase

Details Bacterial expression of superoxide dismutase Bacterial expression of superoxide dismutase

1995-06-02

1997-09-23

Martinell, James

Chemistry: molecular biology and microbiology

Vector, per se

435 691, C12N 1573

Patent

active

056703716

ABSTRACT:
A plasmid for the production of superoxide dismutase or an analog thereof which upon introduction into a suitable bacterial host containing the thermolabile repressor C.sub.I renders the host cell capable, upon increasing the temperature of the host cell to a temperature at which the repressor is destroyed, of effecting expression of DNA encoding superoxide dismutase and production of superoxide dismutase. The plasmid is a double-stranded DNA molecule which includes in 5' to 3' order the following: a DNA sequence which contains the promoter and operator P.sub.L O.sub.L from lambda bacteriophage; the N utilization site for binding antiterminator N protein produced by the host cell; a DNA sequence which contains a ribosomal binding site for rendering the mRNA of the gene encoding superoxide dismutase capable of binding to ribosomes within the host cell; an ATG initiation codon; a restriction enzyme site for inserting the gene encoding superoxide dismutase into the plasmid in phase with the ATG initiation codon; a gene encoding superoxide dismutase; and additionally a DNA sequence which contains an origin of replication from a bacterial plasmid capable of autonomous replication in the host cell and a DNA sequence which contains a gene associated with a selectable or identifiable trait which is manifested when the plasmid is present in the host cell.

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