Abstract
The present study was undertaken to determine the role of glutathione peroxidase3 (gpx3) in phospholipid protection in cells. Wild-type (WT) cells showed an overall increase in phospholipids upon 50 μM cadmium (Cd)-treatment, whereas an untreated gpx3Δ strain showed a drastic reduction in overall phospholipids which was further reduced with 50 μM Cd. In WT cells, Cd-exposure increased the short chain fatty acids and decreased the unsaturated fatty acids and the magnitude was high in Cd-treated gpx3Δ cells. Purified recombinant gpx3p showed higher activity with phospholipid hydroperoxides than shorter hydroperoxides. An increase in gpx activity was observed in Cd-treated WT cells and no such alteration was observed in gpx3Δ. WT cells treated with Cd showed an increase in MDA over untreated, while untreated gpx3Δ cells themselves showed a higher level of MDA which was further enhanced with Cd-treatment. Iron, zinc and calcium levels were significantly altered in WT and gpx3Δ cells during Cd-treatment.






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Abbreviations
- Cd:
-
Cadmium
- CL:
-
Cardiolipin
- Gpx:
-
Glutathione peroxidase
- IPTG:
-
Isopropyl β-d-1-thiogalactopyranoside
- LPL:
-
Lysophospholipids
- MDA:
-
Malondialdehyde
- Ni2+NTA:
-
nickel nitrilo acetic acid-agarose
- PC:
-
Phosphatidylcholine
- PE:
-
Phosphatidylethanolamine
- PHGpx:
-
Phospholipid hydroperoxide glutathione peroxidase
- PI:
-
Phosphatidylinositol
- PLOOH:
-
Phospholipid hydroperoxide
- PS:
-
Phosphatidylserine
- ROS:
-
Reactive oxygen species
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The financial support from Bharathidasan University, Tiruchirappalli, Tamilnadu, India is gratefully acknowledged.
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Muthukumar, K., Rajakumar, S., Sarkar, M.N. et al. Glutathione peroxidase3 of Saccharomyces cerevisiae protects phospholipids during cadmium-induced oxidative stress. Antonie van Leeuwenhoek 99, 761–771 (2011). https://doi.org/10.1007/s10482-011-9550-9
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DOI: https://doi.org/10.1007/s10482-011-9550-9


