Immunomodulatory Effects of Enzymatic-Synthesized α-Galactooligosaccharides and Evaluation of the Structure–Activity Relationship
作者:Zhuqing Dai、Wanyong Lyu、Xiaoli Xiang、Yuhong Tang、Bing Hu、Shiyi Ou、Xiaoxiong Zeng
DOI:10.1021/acs.jafc.8b01939
日期:2018.8.29
synthesized using galactose as the substrate and α-galactosidase from Aspergillus niger as the catalyst. In the reaction, synthesized products of U1, U2, U3, and U4 were detected by high-performance liquid chromatography. By mass spectrometry, nuclear magnetic resonance, and 1-phenyl-3-methyl-5-pyrazolone derivatization, U1 was the mixture of disaccharides of α-d-Galp-(1→1)-α-d-Gal, α-d-Galp-(1→2)-α-d-Gal,
在这项研究中,以半乳糖为底物,黑曲霉的α-半乳糖苷酶为催化剂,合成了α-半乳糖寡糖(α-GOSs)。在该反应中,通过高效液相色谱法检测到U1,U2,U3和U4的合成产物。通过质谱,核磁共振和1-苯基-3-甲基-5-吡唑啉酮衍生化,U1是α- d -Gal p-(1→1)-α- d -Gal,α-的二糖混合物d -Gal p - (1→2)-α- d -Gal,α- d -Gal p - (1→3)-α- d -Gal,α- d -Gal p - (1→4)-α - d-Gal,U2被鉴定为α- d -Gal p-(1→6)-α- d- Gal,U3是通过一个α-(1→6)-糖苷键和另一个α-连接的半乳糖的混合物-糖苷键,并且U4被鉴定为α- d- Gal p-(1→6)-α- d- Gal p-(1→6)-α- d- Gal。然后,使用天然材料合成的α-GOSs(U1,U2,U3,U4