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Microbiology. 1994 May;140 ( Pt 5):1203-8.

Cloning, nucleotide sequence and characterization of a gene encoding superoxide dismutase from Campylobacter jejuni and Campylobacter coli.

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Institute of Food Research, Reading Laboratory, UK.


Genes encoding superoxide dismutase (SOD: EC were cloned from Campylobacter jejuni NCTC 11351 and Campylobacter coli UA585 by heterologous complementation of a SOD-deficient Escherichia coli mutant. Deletion analysis of the cloned C. jejuni DNA assigned the sod gene to a 1.2 kb insert and this contained an open reading frame of 660 bp. The deduced gene product of 220 amino acids was 71% identical to the E. coli iron-containing SOD and 60% identical to the E. coli manganese-containing SOD. The recombinant SOD was expressed at high levels in E. coli and protected a sodA sodB double mutant from the toxic effects of methyl viologen. Nucleotide sequence analysis of the corresponding gene from C. coli showed it to be 92% identical to that from C. jejuni.

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