Glycosidase-catalysed synthesis of oligosaccharides: a one step synthesis of lactosamine and of the linear B type 2 trisaccharide α-d-Gal-(1→3)-β-d-Gal-(1→4)-β-d-GlcNAcSEt involved in the hyperacute rejection response in xenotransplantation from pigs to man and as the specific receptor for toxin A from Clostridium difficile
摘要:
芽孢杆菌β-半乳糖苷酶的连续使用
环状菌和曲霉属的 α-半乳糖苷酶
米酵母产生线性 B 三糖 2,被鉴定为表位
在猪对人异种移植过程中结合抗 Gal 抗体
作为艰难梭菌毒素 A 的受体。
Chemoenzymatic synthesis of ethyl 1-thio-(β-D-galactopyranosyl)-O-β-D-glycopyranosyl disaccharides using the β-galactosidase from Bacillus circulans
作者:Gabin Vic、Jeremy J. Hastings、Oliver W. Howarth、David H.G. Crout
DOI:10.1016/0957-4166(96)00066-3
日期:1996.3
Different ethyl 1-thio-β-D-disaccharides have been synthesised by transgalactosylation using the β-galactosidase fromBacilluscirculans as biocatalyst. This β-galactosidase shows mainly a β-1–4 specificity in the galactosyl transfer. Gal-β-(1–4)-O-β-D-GlcSEt 15 was obtained in 36% yield, Gal-β-(1ndash;4)-O-α-D-GlcSEt 19 in 30% yield, Gal-β-(1–4)-O-β-D-GalSEt 17 in 60% yield, Gal-β-(1–4)-O-β-D-GalNAcSEt
Glycosidase-catalysed synthesis of oligosaccharides: a one step synthesis of lactosamine and of the linear B type 2 trisaccharide α-d-Gal-(1→3)-β-d-Gal-(1→4)-β-d-GlcNAcSEt involved in the hyperacute rejection response in xenotransplantation from pigs to man and as the specific receptor for toxin A from Clostridium difficile
作者:Gabin Vic、Chuong Hao Tran、Michaela Scigelova、David H. G. Crout
DOI:10.1039/a607255k
日期:——
Sequential use of the β-galactosidase from Bacillus
circulans and an α-galactosidase from Aspergillus
oryzae give the linear B trisaccharide 2, identified as the epitope
that binds anti-Gal antibodies during pig-to-man xenotransplantation and
as the receptor for toxin A from Clostridium difficile.
芽孢杆菌β-半乳糖苷酶的连续使用
环状菌和曲霉属的 α-半乳糖苷酶
米酵母产生线性 B 三糖 2,被鉴定为表位
在猪对人异种移植过程中结合抗 Gal 抗体
作为艰难梭菌毒素 A 的受体。
Syntheses of Modified Carbohydrates with Glycosidases: Stereo- and Regiospecific Syntheses of Lactosamine Derivatives and Related Compounds<sup>1</sup>
Abstract Different lactosamine derivatives, modified in the 2-N- and anomeric positions and suitable as intermediates for synthesis of Lewis-x and related compounds, were prepared with high specificity on a multigram scale directly from lactose, employing different D-glucosamine derivatives as acceptors and the abundant β-D-galactosidase from Bullera singularis as catalyst. Thus, methyl O-β-D-gala