Iron Storage in Mycobacterium smegmatis Grown under Iron-sufficient and Iron-overload Conditions

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概要

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• Two kinds of iron-containing proteins the molecular masses of which were about 10kDa and 24kDa were isolated from cytoplasmic fractions of Mycobacterium smegmatis grown under iron-sufficient (50μM Fe) and iron-overload (500μM Fe) conditions. Based upon the elution profiles in two chromatographic systems, spectrophotometric analysis, and ESR spectrum measurement, the protein of 10kDa met the criteria for classification as a ferredoxin. Another protein of 24 kDa showed no enzymatic activity, though its detailed structure was unknown. The ferredoxin and the protein of 24kDa contained about 30% and 50% of the total cellular iron, respectively, when cells were grown under the above conditions. The synthesis of the protein of 24kDa was, however, completely repressed in cells grown under iron-deficient (0.5μM Fe) conditions, although the ferredoxin was still synthesized to some extent even in iron-deficient cells. These results suggested that both ferredoxin and the protein of 24kDa could be synergistically involved in iron storage in this organism.

• 社団法人日本農芸化学会の論文
• 1994-05-23

著者

• Kikuchi Shintaro

  Department Of Applied Chemistry Muroran Institute Of Technology

• Kikuchi Shintaro

  Department Of Applied Microbiology

• TAKAHASHI Hiroshi

  Center for Rheumatic Diseases, Tokyo Government General Hospital of Bokuto

• Fukumoto Miki

  Department of Applied Microbiology

• Takahashi Hiroshi

  Center For Cooperative Research & Development Muroran Institute Of Technology

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