Efficient and Specific Conversion of 9‐Lipoxygenase Hydroperoxides in the Beetroot. Formation of Pinellic Acid
作者:Mats Hamberg、Ulrika Olsson
DOI:10.1007/s11745-011-3592-7
日期:2011.9
into 9(S),12(S),13(S)‐trihydroxy‐10(E),15(Z)‐octadecadienoic acid (fulgidic acid). On the other hand, the 13‐lipoxygenase‐generated hydroperoxides of linoleic or linolenic acids failed to produce significant amounts of trihydroxy acids. Short‐time incubation of 9(S)‐hydroperoxy‐10(E),12(Z)‐octadecadienoic acid afforded the epoxy alcohol 12(R),13(S)‐epoxy‐9(S)‐hydroxy‐10(E)‐octadecenoic acid as the
的亚油酸9脂肪氧合酶产物9(小号)-hydroperoxy-10(É),12(Ž) -十八碳二酸与来自甜菜的粗酶制剂搅拌(甜菜SSP。寻常变种寻常),得到由产物9(S),12(S),13(S)-三羟基-10(E)-十八碳烯酸(松香酸)的95%。源自亚麻酸的氢过氧化物9(S)-氢过氧-10(E),12(Z),15(Z)-十八碳三烯酸以类似的方式转化为9(S),12(S),13(S)-三羟基-10(E),15(Z)-十八碳二烯酸(黄腐酸)。另一方面,由13-脂氧合酶生成的亚油酸或亚麻酸的氢过氧化物不能产生大量的三羟基酸。短时孵育9(S)-氢过氧-10(E),12(Z)-十八碳二烯酸得到环氧醇12(R),13(S)-环氧-9(S)-羟基-10(E)-十八碳烯酸为主要产物,分别表示由环氧醇合酶和环氧化物水解酶活性催化的9-氢过氧化物→环氧醇→三羟基酸的序列。甜菜根中检测到的酶系统的高容量与简单的分