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Mugineic-acid 3-dioxygenase (, ''IDS2'') is an enzyme with system name ''mugineic acid,2-oxoglutarate:oxygen oxidoreductase (3-hydroxylating)''. This enzyme catalyses the following chemical reaction : (1) mugineic acid + 2-oxoglutarate + O2 3-epihydroxymugineic acid + succinate + CO2 : (2) 2'-deoxymugineic acid + 2-oxoglutarate + O2 3-epihydroxy-2'-deoxymugineic acid + succinate + CO2 Mugineic-acid 3-dioxygenase contains iron(II). Mugineic acid is an amino acid excreted by some graminaceous (grassy) plants under conditions of iron deficiency as part of a strategy of solubilizing Fe from the root environment for uptake by the plant. Mugineic acid is closely related to its biochemical precursor, nicotinamine, and to a number of other compounds that also have been identified as phytosiderophores in graminaceous plants: 3-hydroxymugineic acid, 2'-deoxymugineic acid, avenic acid, and distichonic acid. The effectiveness of mugineic acid under iron-deficient conditions is dependent not only upon the iron chelating properties of the Fe-mugineic acid complex itself but also upon the presence of a plant membrane carrier that recognizes and absorbs the Fe-mugineic acid complex almost exclusively.〔http://www.soils.wisc.edu/~barak/images/mug_frm.htm〕 == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mugineic-acid 3-dioxygenase」の詳細全文を読む スポンサード リンク
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