Regulation of Enzyme Activities by Free Mg〔2+〕 Concentration--Regulation of Stromal Fructose-1,6-bisphosphatase and Ribulose 1,5-Bisphosphate Carboxylase Activities (糖質関連酵素化学シンポジウム) Regulation of Enzyme Activities by Free Mg^<2+> Concentration : Regulation of Stromal Fructose-1, 6-bisphosphatase and Ribulose 1, 5-Bisphosphate Carboxylase Activities

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Although Mg is abundant within the cell, most is chelated to various organic molecules; only a small fraction of intracellular Mg is in the free (ionized) form, Mgtt Free Mg<SUP>2+</SUP> regulates manyenzyme activities in cells. The effect of free Mg<SUP>2+</SUP> concentration on the activities of spinach hloroplast fructose-1, 6-bisphosphatase (FBPase) and ribulose 1, 5-bisphosphate carboxylase (rubisco) was examined. Free Mg<SUP>2+</SUP> concentrations in the assay mixtures were directly measured by a Mgtsensitive dye, mag-fura-2. FBPase was activated by a physiological concentration range of free Mgt, but the activation of rubisco was not observed. These results suggest that in illuminated chloroplasts, the increase in free Mg<SUP>2+</SUP> activates FBPase, and this may be a physiological factor to stimulate CO<SUB>2</SUB> fixation.

収録刊行物

  • 応用糖質科学 : oyo toshitsu kagaku = Journal of applied glycoscience

    応用糖質科学 : oyo toshitsu kagaku = Journal of applied glycoscience 49(2), 199-203, 2002-04-01

    The Japanese Society of Applied Glycoscience

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各種コード

  • NII論文ID(NAID)
    10008253713
  • NII書誌ID(NCID)
    AN10453916
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    13403494
  • NDL 記事登録ID
    6142482
  • NDL 雑誌分類
    ZP24(科学技術--化学・化学工業--糖・澱粉)
  • NDL 請求記号
    Z17-15
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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