| Autor: | Andrei L. Brioukhanov, Alexander I. Netrusov, Rudolf K. Thauer |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
chemistry.chemical_classification
Antioxidant biology medicine.medical_treatment Anaerobic microorganisms biology.organism_classification Applied Microbiology and Biotechnology Microbiology Clostridia Superoxide dismutase chemistry.chemical_compound Enzyme Biochemistry chemistry Catalase medicine biology.protein Energy source Hemin |
| Zdroj: | Microbiology. 71:281-285 |
| ISSN: | 0026-2617 |
| DOI: | 10.1023/a:1015846409735 |
| Popis: | Strictly anaerobic microorganisms relating to various physiological groups were screened for catalase and superoxide dismutase (SOD) activity. All of the investigated anaerobes possessed SOD activity, necessary for protection against toxic products of oxygen reduction. High specific activities of SOD were found in Acetobacterium woodii and Acetobacterium wieringae. Most of the investigated clostridia and acetogens were catalase-negative. A significant activity of catalase was found in Thermohydrogenium kirishiense, in representatives of the genus Desulfotomaculum, and in several methanogens. Methanobrevibacter arboriphilus had an exceptionally high catalase activity after growth in medium supplemented with hemin. Hemin also produced a strong positive effect on the catalase activity in many other anaerobic microorganisms. In methanogens, the activities of the enzymes of antioxidant defense varied in wide ranges depending on the stage of growth and the energy source. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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