Identification and Characterization of Two New 1-<i>O</i>-Acyl-glucose-ester Forming Glucosyltransferases from <i>Erigeron breviscapus</i>
作者:Yan Yang、Minzhi Liu、Wenxuan Zhang、Yunsong Cao、Changkun Li、Wei Wang
DOI:10.1021/acs.jafc.8b07215
日期:2019.3.13
Two versatile UDP-glucosyltransferases, UGT75L25 and UGT75X1, were isolated from Erigeron breviscapus. The enzymes display high sequence identity to flavonoid 7-O-glucosyltransferase from Malus species and cluster to the phylogenetic group L of plant glucosyltransferases, also involved in the formation of hydroxycinnamoyl glucose esters, which are used as bifunctional donors in the glucosylation or
从灯盏花中分离出两种通用的UDP-葡萄糖基转移酶UGT75L25和UGT75X1 。该酶与来自苹果属植物的类黄酮7- O-葡萄糖基转移酶具有高度的序列同一性,并簇集到植物葡萄糖基转移酶的系统发生群L上,还参与了羟基肉桂酰基葡萄糖酸酯的形成,在花色苷的糖基化或酰化中用作双功能供体。 。在大肠杆菌中功能表达的酶,对21种结构多样的酚酸(包括(羟基)肉桂酸酯,香草酸,3-羟基香豆素和7-羟基类黄酮)具有广泛的底物特异性。利用UGT75L25和UGT75X1的催化特性,可以高效地生成相应的酰基-葡萄糖酯或糖苷。这些发现证明了酰基葡萄糖酯在生物活性花色苷的进一步酶促合成中的巨大潜力。