Functional characterization and gene expression profiling of superoxide dismutase from plant pathogenic phytoplasma
| Autor: | Chihiro Miura, Kyoko Sugawara, Shigetou Namba, Yutaro Neriya, Misako Himeno, Nami Minato, Ken Komatsu, Kenro Oshima, Yasuyuki Yamaji, Kensaku Maejima, Takuya Keima |
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| Rok vydání: | 2012 |
| Předmět: |
Phytoplasma
Chrysanthemum medicine.disease_cause Microbiology Hemiptera Gene product Superoxide dismutase Gene expression Genetics medicine Animals Cloning Molecular Plant Diseases chemistry.chemical_classification Reactive oxygen species biology Superoxide Dismutase Gene Expression Profiling food and beverages Pathogenic bacteria Sequence Analysis DNA General Medicine biology.organism_classification chemistry biology.protein Mollicutes Reactive Oxygen Species Bacteria |
| Zdroj: | Gene. 510:107-112 |
| ISSN: | 0378-1119 |
| Popis: | The rapid production of huge amounts of reactive oxygen species (ROS) is one of the responses of animal and plant cells induced under stress conditions, such as pathogenic bacterial infection. To protect against the cytotoxic ROS, it is important for pathogenic bacteria to inactivate ROS by employing their antioxidant enzymes like superoxide dismutase (SOD). Here, we cloned and characterized the sodA gene from the plant pathogenic bacterium, ‘ Candidatus Phytoplasma asteris’ OY-W strain. This is the first description of gene expression and antioxidant enzymatic activity of SOD from a phytoplasma. We also demonstrated the sodA gene product (OY-SOD) functions as Mn-type SOD. Since other Mollicutes bacteria such as mycoplasmas do not possess sodA probably due to reductive evolution, it is intriguing that phytoplasmas possess sodA despite their lack of many metabolic genes, suggesting that OY-SOD may play an important role in the phytoplasma colonization of plants and insects. Moreover, Western blot analysis and real-time PCR revealed that OY-SOD is expressed when the phytoplasma is grown in both plant and insect hosts, suggesting it is functioning in both hosts. Possible role of SOD in protection against damage by host-derived ROS is discussed. |
| Databáze: | OpenAIRE |
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