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Functional expression of a recombinant copper/zinc superoxide dismutase of filarial nematode, Brugia malayi

Journal of Parasitology, ISSN: 0022-3395, Vol: 91, Issue: 1, Page: 205-208
2005
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Article Description

A gene encoding a copper/zinc superoxide dismutase (Cu/ Zn-SOD) of a filarial nematode, Brugia malayi, has been isolated and the biochemical properties of a functionally expressed recombinant enzyme were investigated. The cloned complementary DNA contained a single open reading frame of 477 bp encoding 158 amino acids (aa), which conserved metal-binding residues as well as residues specific for Cu/Zn-SODs. Comparison of the deduced aa sequence of the enzyme with that of other helminthes species, including filarial worms, exhibited high degree of similarities (49-98%). Recombinant enzyme of 32 kDa had an isoelectric point of 6.6 and was shown to consist of 2 subunits linked by interchain disulfide bonds. Enzyme activity of the recombinant protein was inhibited by potassium cyanide and hydrogen peroxide but not by sodium azide. It showed a wide range of pH optima, i.e., 7.0-11.0 and was highly resistant to heat inactivation. © American Society of Parasitologists 2005.

Bibliographic Details

W. G. Lee; J. H. Cho; H. W. Lee; S. H. Cho; T. S. Kim; J. H. Hwang; Y. Kong; B. K. Na; C. Y. Song

American Society of Parasitologists

Immunology and Microbiology; Agricultural and Biological Sciences

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