A one-pot multienzyme cofactors recycling (OPME-CR) system was designed for the synthesis of UDP-α-d-galactose, which was combined with LgtB, a β-(1,4) galactosyltransferase from Neisseria meningitidis, to modify various polyphenol glycosides. This system recycles one mole of ADP and one mole of UDP to regenerate one mole of UDP-α-d-galactose by consuming two moles of acetylphosphate and one mole of
Enzymatic synthesis of novel quercetin sialyllactoside derivatives
作者:Sumangala Darsandhari、Jae Yoon Bae、Biplav Shrestha、Tokutaro Yamaguchi、Hye Jin Jung、Jang Mi Han、Chan-Su Rha、Ramesh Prasad Pandey、Jae Kyung Sohng
DOI:10.1080/14786419.2018.1481842
日期:2019.7.3
Quercetin and its derivatives are important flavonols that show diverse biological activity, such as antioxidant, anticarcinogenic, anti-inflammatory, and antiviral activities. Adding different substituents to quercetin may change the biochemical activity and bioavailability of molecules, when compared to the aglycone. Here, we have synthesised two novelderivatives of quercetin, quercetin-3-O-β-d-glucopyranosyl
槲皮素及其衍生物是重要的黄酮醇,它们具有多种生物活性,例如抗氧化剂,抗癌性,抗炎和抗病毒活性。与糖苷配基相比,在槲皮素中添加不同的取代基可能会改变分子的生化活性和生物利用度。在这里,我们合成了槲皮素的两种新型衍生物,槲皮素-3- O - β - d-吡喃葡萄糖基,4''- O - d-半乳糖吡喃糖基3'''- O - α - N-乙酰基神经氨酸,即3'-唾液酸乳糖基槲皮素(3'SL-Q)和槲皮素-3- O - β - d-吡喃葡萄糖基,4''-使用糖基转移酶和唾液酸转移酶,将O - β - d-吡喃半乳糖基6'''- O - α - N-乙酰神经氨酸(即6'-唾液酸基槲皮素(6'SL-Q))。槲皮素的这些衍生物通过高分辨率四极杆飞行时间电喷雾电离质谱(HR-QTOF-ESI / MS)和1 H和13 C核磁共振(NMR)分析进行了表征。