Metabolism of hydrogen peroxide in Euglena gracilis Z by L-ascorbic acid peroxidase.
Euglena gracilis was found to contain a peroxidase that specifically require L-ascorbic acid as the natural electron donor in the cytosol. The presence of an oxidation-reduction system metabolizing L-ascorbic acid was demonstrated in Euglena cells. Oxidation of L-ascorbic acid by the peroxidase, and the absence of ascorbic acid oxidase activity, suggests that the system functions to remove H2O2 in E. gracilis, which lacks catalase.
D060387:Ascorbate Peroxidases; D005056:Euglena gracilis / Q000201:enzymology*; D006861:Hydrogen Peroxide / Q000378:metabolism*; D010084:Oxidation-Reduction; D010544:Peroxidases / Q000378:metabolism*; D011748:Pyrogallol / Q000378:metabolism; D013347:Subcellular Fractions / Q000201:enzymology
D011748:Pyrogallol; D006861:Hydrogen Peroxide; D010544:Peroxidases; D060387:Ascorbate Peroxidases