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Characterization of superoxide dismutase in the rumen bacteriumStreptococcus bovis

Author

Listed:
  • K. Holovská

    (Institute of Animal Physiology, Slovak Academy of Science, Košice, Slovak Republic)

  • V. Lenártová

    (Institute of Animal Physiology, Slovak Academy of Science, Košice, Slovak Republic)

  • K. Holovská

    (Institute of Animal Physiology, Slovak Academy of Science, Košice, Slovak Republic)

  • P. Javorský

    (Institute of Animal Physiology, Slovak Academy of Science, Košice, Slovak Republic)

Abstract

Superoxide dismutase (SOD) isoenzymes of the rumen bacterium Streptococcus bovis 4/1 were studied. Native PAGE showed a single band of Mn-SOD, unaffected by 10 mM cyanide or 5 mM hydrogen peroxide under both aerobic and anaerobic growth conditions. When the metals were removed from the growth medium by Chelex 100, the addition of manganese increased enzymatic activity, while addition of iron inhibited SOD activity. Changes in Mn-SOD and glutathione peroxidase (GSHPx) activities evoked by paraquat and increased values of TBARS indicated that these enzymes were not able to sufficiently prevent oxidative stress at given paraquat concentrations.

Suggested Citation

  • K. Holovská & V. Lenártová & K. Holovská & P. Javorský, 2002. "Characterization of superoxide dismutase in the rumen bacteriumStreptococcus bovis," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 47(2-3), pages 38-44.
    • Handle: RePEc:caa:jnlvet:v:47:y:2002:i:2-3:id:5801-vetmed
    DOI: 10.17221/5801-VETMED
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