• 제목/요약/키워드: Acinetobacter sp. JC1

검색결과 6건 처리시간 0.022초

Reclassification of a Carboxydobacterium, Acinetobacter sp. Strain JC1 DSM3803, as Mycobacterium sp. Strain JC1 DSM 3803

  • Taeksun Song;Lee, Hyeyoung;Park, Yong-Ha;Kim, Eungbin;Ro, Young-Tae;Kim, Si-Wouk;Kim, Young-Min
    • Journal of Microbiology
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    • 제40권3호
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    • pp.237-240
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    • 2002
  • A carboxydotrophic bacterium, isolated from a soil sample in Seoul, was classified initially as Acinetobacter sp. strain JC1 DSM 3803. Chemotaxanomic properties, analysis of the 16s rDNA sequence, fatty acid content, and molecular Phylogenetic analysis based on rpoB gene, however, suggested that this bacterium belongs to the genus, Mycobacterium. On the basis of this evidence, it is proposed that Acinetobacter sp. strain JC1 DSM 3803 be reclassified as Mycobacterium sp. strain JC1 DSM 3803.

Acinetobacter sp. Strain JC1 DSM 3803에 존재하는 일산화탄소 산화효소의 구성적 발현 (Constitutive Expression of Carbon Monoxide Dehydrogenase in Acinetobacter sp. Strain JC1 DSM 3803)

  • 노영태;김영민
    • 미생물학회지
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    • 제31권3호
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    • pp.214-217
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    • 1993
  • Carbon monoxide dehydrogenase (CO-DH) was found to be present in Acinetobacter sp. strain JC1 grown on CO and also on methylotrophic and heterotrophic substrates, except for pyruvate and nutrient broth. The amounts of CO-DH in cells grown on methylamine, glucose, galactose, and succinate were comparable to that of the CO-grown cells. CO-DH activity, however, was onot deteted by the dye-linked assay method in cell extracts prepared from cells grown on organic substrates, except on ethanol and succinate. THe activity was detected when the CO-DH was stained by activity using CO as a substrate. CO-DHs in cells grown on different substrates were found to be identical in immunological properties.

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Growth on Methanol of a Carboxydobacterium, Acinetobacter sp. Strain JC1 DSM 3803

  • Ro, Young-Tae;Seo, Jae-Goo;Lee, Joo-Hun;Kim, Dae-Myung;Chung, In-Kwon;Kim, Tae-Ue;Kim, Young-Min
    • Journal of Microbiology
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    • 제35권1호
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    • pp.30-39
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    • 1997
  • Acinetobacter sp. strain JC1 DSM 3803, a carboxydobacterium, was found to grow methylotrophically at the expense of methanol and methlamine, but not of methane, formaldehyde, formate, dimethylamine, or trimethylamine, as the sole source of carbon and energy. The doubling times of the bacterium growing on methanol (0.5%, v/v) and methylamine (0.5%, w/v) at 3$0^{\circ}C$ and pH 6.8 were 4.8 h and 5.7 h, respectively. Cells grown on methanol, however, failed to show typical methanol dehydrogenase and oxidase activities. The cell was found to contain no c-type cytochromes. Cells grown on methanol exhibited higher catalase activity than those grown on pyruvate or glucose. The catalase present in the cells also exhibited peroxidase activity. The catalase activity, growth on methanol of the cell, and oxygen consumption by methanol-grown maldehyde dehydrogenase, formaldehyde reductase, glucose-6-phosphate dehydrogenase, and 6-phosphogluconate dehydrogenase activities were detected from cells grown on methanol.

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포도당을 이용하여 성장하는 Acinetobacter sp. Strain JC1 DSM 3809에 존재하는 Catalase (Catalases in Acinetobacter sp. Strain JC1 DSM 3803 Growing on Glucose)

  • 신경주;노영태;김영민
    • 미생물학회지
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    • 제32권2호
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    • pp.155-162
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    • 1994
  • 포도당을 이용하여 성장하고 있는 호기성 일산화탄소 산화 세균인 Acinetobacter sp. Strain JC1 DSM 3808애 존재하는 catalase의 활성은 지수성장기 중반에서 높게 나타났으나, 지수성장기 후반 및 정체기 초기에서 낮아졌다가 정체기 중기에서 급격히 증가한 후 다시 감소하였다. 이 세균에는 세종류(Cat1, Cat2, Cat3)의 catalase가 존재하였는데, Cat1과 Cat3의 활성은 성장시기에 따라 큰 차이를 보이지 않았으나 Cat2의 활성은 성장시기에 따라 큰 변화를 나타내었다. Cat3는 이 세균이 포도당을 이용하여 성장할 때만 생성되었고, 일산화탄소나 메탄올을 이용하여 성장할 때는 생성되지 않았다. 세포추출액을 ethanol과 chloroform으로 처리한 후 활성염색을 하였을 때 Cat1과 Cat3의 활성은 안정하였으나 Cat2는 활성을 상실하였다. 세포추출액을 20mM $H_2O_2$와 3-amino-1,2,4-triazole(AT)을 처리하였을 때 Cat1과 Cat3의 활성이 반감되었고, Cat2는 $H_2O_2$에 의해서는 불활성되었으나 AT의 영향은 받지 않았다. Cat1은 80$^{\circ}C$ 1분간 열처리후에도 활성을 나타내었으나, Cat2와 Cat3는 60$^{\circ}C$와 70$^{\circ}C$에서 1분간의 열처리 후 각각 활성을 상실하였다. Cat2는 catalase 활성외에 peroxidase의 활성도 나타내었다. 일곱단계의 과정을 거쳐 포도당에서 성장시에만 생성되는 Cat3를 정제하였다. 정제된 Cat3의 크기는 150,000이었고, 63,000의 크기를 가진 두개의 동일한 소단위로 구성되어 있었으며, $H_2O_2$에 대한 K_m값은 39mM과 58mM로 나타났다. 정제된 효소의 활성을 위한 최적 pH는 7.0이었으나 전반적으로 pH 6~9에서 비슷하게 높은 활성을 나타내었다. 정제된 효소의 최적온도는 40$^{\circ}C$이었으며 20~50$^{\circ}C$에서 비슷한 활성을 나타내었고, 30$^{\circ}C$에서는 60분동안 효소활성이 거의 상실되지 않았다. 정제된 효소는 ethanol과 chloroform 처리에는 안정하였으나 12mM AT 와 0.1mM $NaN_3$ 및 1mM KCN에 의해 90% 이상의 활성이 억제되었다.

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