• Exposure to Se or mimosine exhibited a differential response in the mitochondrial catalase and ascorbate peroxidase (Asc-Px) activities. (typeset.io)
  • 2011 ). On the other side, plants have developed some enzymatic systems including superoxide dismutases (SOD), catalases (CAT), ascorbate peroxidases (APX), peroxiredoxins and non-enzymatic mechanisms to protect against oxidative damage caused by these ROS (Agrawal et al. (springeropen.com)
  • Peroxidase activity registered a significant increase by threefold in mitochondria and fourfold in soluble fraction in both Se and mimosine groups. (typeset.io)
  • In the Se groups, both catalase and Asc-Px in mitochondria decreased by 50-60%, which was contrasted by 60% increase in Asc-Px activity and 40% in catalase activity in mimosine groups. (typeset.io)
  • Mn deficiency induced the oxidative stress for increase the H 2 O 2 and MDA content in leaves of plants and reduce the activity of antioxidant enzymes and total phenols causing damage to quantum efficiency of photosystem II and pigment content. (biomedcentral.com)
  • Based on this mechanism, both activities should be mutually antagonistic and peroxidatic electron donors should inhibit the catalase activity. (auburn.edu)
  • In fact, it has been established that the common peroxidatic electron donor o-dianisidine does inhibit the catalase activity of KatG from Escherichia coli at pH 7.5. (auburn.edu)
  • The role of GSH and catalase were also investigated by treating the Malignant Pleural Mesothelioma cells and A549 adenocarcinoma cells with buthionine sulfoximine (BSO), to block glutathione synthesis, and aminotriazole (ATZ) to inhibit catalase. (charismaticplanet.com)
  • Our proteomic approach thus agreed with previously published biochemical and RT-qPCR data which reported down-regulation of scavenging enzymes and accumulation of H 2 O 2 in recovered plants, possibly suggesting a role for this molecule in remission from infection. (biomedcentral.com)
  • In the expression and possible role of the major antioxidant enzymes (AOEs), the manganese superoxide dismutase (MnSOD), catalase, and mechanisms closely related to glutathione (GSH) metabolism were investigated in the biopsies of Malignant Pleural Mesothelioma and/or cell lines in culture. (charismaticplanet.com)
  • In conclusion, the simultaneous induction of multiple antioxidant enzymes can occur in human mesothelioma cells. (charismaticplanet.com)
  • Some enzymes involved in the antioxidant response that were up-regulated in infected plants, such as isocitrate dehydrogenase and glutathione S-transferase, returned to healthy-state levels in recovered plants. (biomedcentral.com)
  • As the name suggests, they catalyze the decomposition of H2O2 by catalatic and peroxidatic mechanisms using a single active site. (auburn.edu)
  • Conversely, catalase activity can sustain high concentrations of H2O2 without the enzyme inactivation. (auburn.edu)
  • In the absence of a peroxidatic electron donor, we observed a "low-KM" and "high-KM" component for catalase activity at pH 5.0. (auburn.edu)