Purification and identification of the type of superoxide dismutase fromGlœocapsa sp. |
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Authors: | O Hammouda |
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Institution: | (1) Department of Botany, Faculty of Science, Cairo University, Beni-Suef Branch, Beni-Suef, Egypt |
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Abstract: | Superoxide dismutase purified from the photoautotrophic cyanobacteriumGlœocapsa sp. has a molar mass of 38 kDa, as estimated by gel filtration. Inhibition pattern indicated limited resistance to H2O2 under conditions which entirely inhibited FeSOD. The enzyme is insensitive to cyanide and is inhibited by azide. This suggested
the presence of a hybrid of two isozymes, FeSOD and a minor constituent of MnSOD. Amino acid composition of the purified SOD
showed structural homology to FeSOD and MnSOD apoenzymes. |
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Keywords: | |
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