L-艾杜糖醇2-脫氫酶(英語:L-iditol 2-dehydrogenase,EC 1.1.1.14 (頁面存檔備份,存於互聯網檔案館))是一種以NAD+或NADP+為受體、作用於供體CH-OH基團上的氧化還原酶。這種酶能催化以下酶促反應:
- L-艾杜糖醇 + NAD+ L-山梨糖 + NADH + H+
L-艾杜糖醇2-脫氫酶廣泛存在於各種生物細胞中,現已在古菌、細菌、真菌、植物和動物細胞中發現了這種酶。L-艾杜糖醇2-脫氫酶可以作用於包括L-艾杜糖醇、D-葡萄糖醇、D-木糖醇和D-半乳糖醇(D-衛矛醇)等糖醇分子。不同生物不同組織中的L-艾杜糖醇2-脫氫酶對不同的底物具有特異性。L-艾杜糖醇2-脫氫酶對能特異性識別NAD+,但不能利用NADP+。這種酶主要參與果糖和甘露糖之間的轉化過程。
參考文獻
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