A Study on the Mechanism of DNA Excretion from P. aeruginosa KYU-1:Effect of Mitomycin C on Extracellular DNA Production
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概要
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The mechanism of excretion of DNA was investigated using strain KYU-1. This strain produced a considerable amount of DNA extracellularly (7.8 mg/ml), and the amount of extracellular DNA per ml of the culture was scores of times more compared to that of intracellular DNA per ml of the culture. DNA synthesis was repressed by the addition of inhibitors (nalidixic acid, 5-fluoro uracil or mitomycin C), their inhibition rates were 35 to 54%. With the addition of 100 μg/ml of mitomycin C at the middle of the logarithmic growth phase, only 0.89 mg of extracellular DNA per ml of the culture was obtained, the inhibition rate was 95%. However, the amount of organic phosphate synthesized in the culture was almost the sameno matter whether with or without an inhibitor. Furthermore, the excretion of DNA from the cell surface of strain KYU-1 was observed with on electron microscope and the DNA molecules excreted were found to be double-stranded.
- 社団法人 日本農芸化学会の論文
著者
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Hara Toshio
Department Of Electrical Engineering National Defense Academy:(present Address) Central System Manag
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Ueda Seinosuke
Department Of Agricultural Chemistry Faculty Of Agriculture Hokkaido University
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HARA TOSHIO
Department of Food Science & Technology, Faculty of Agriculture, Kyushu University
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