腸内細菌によるこんにゃくマンナンの代謝機構に関する研究 (第4報)

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タイトル別名
  • On Mechanism of “Konjac” Mannan Metabolism by Gastrointestinal Bacteria
  • チョウ ナイ サイキン ニ ヨル コンニャク マンナン ノ タイシャ キコウ ニ カンスル ケンキュウ 4 Aerobacter mannanolyticus ノ タイシャ ケイロ ト コンニャク マンナン ノ タイシャ キコウ
  • On Metabolic Pathway in <I>Aerobacter mannanolyticus</I> and on Mechanism of “Konjac” Mannan Metabolism by <I>Aerobacter mannanolyticus</I>
  • <I>Aerobacter mannanolyticus</I>の代謝経路とこんにゃくマンナンの代謝機構

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The authors previously suggested that a possible mechanism for the “Konjac” mannan metabolism by A. mannanolyticus may be related to glyoxylate pathway. However, later it was found that isocitritase was significantly formed in the cells grown on citrate medium, while no enzyme activity was measured in the cells grown on glucose medium. It was presumed from this that isocitritase may be adaptively formed by A. mannanolyticus grown on citrate. medium.<BR>In the present paper, each enzyme activity concerning the TCA cycle in A. mannanolyticus was measured.<BR>Most of the enzymes relating to the TCA cycle have been demonstrated to be presented constitutively in cell free extracts of A. mannanolyticus grown on citrate medium from the experimental data.<BR>In conclusion, the authors correct the previous hypothesis for the “Konjac” mannan metabolism and propose as follows; “Konjac” mannan in human diet is decomposed to glucose and mannose by A. mannanolyticus in intestine, and subsequently a part of these sugars may be finally metabolized via TCA cycle by A. mannanolyticus in our gastrointestine.

収録刊行物

  • 栄養と食糧

    栄養と食糧 18 (6), 421-425, 1966

    公益社団法人 日本栄養・食糧学会

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