A new alpha-L-fucosidase was partially purified from the culture broth of Penicillium multicolor, which was available commercially as a freeze dried powder by the name of Lactase-P(TM). This enzyme catalysed the transglycosylation of fucose residue of p-nitrophenyl-alpha-L-fucopyranoside to give alpha-L-Fuc-(1-->3)-D-Glc or alpha-L-Fuc-(1-->3)-D-GlcNAc regioselectively. This enzyme was more stable in the organic co-solvents than the alpha-fucosidase from Aspergillus niger, which was also proposed previously by us as an enzyme to produce fucosyl oligosaccharides. (C) 1998 Elsevier Science Ltd. All rights reserved.
Regioselective synthesis of α-l-fucosyl-containing disaccharides by use of α-l-fucosidases of various origins
作者:Katsumi Ajisaka、Mayumi Shirakabe
DOI:10.1016/0008-6215(92)84115-9
日期:1992.2
Inhibitors of E-, P- and L-selectin binding
申请人:The Scripps Research Institute
公开号:US05830871A1
公开(公告)日:1998-11-03
Inhibitors of E-, P- and L-selectin binding are synthesized by an aldol addition reaction between a glycoside aldehyde precursor and dihydroxyacetone phosphate or a derivative thereof. The addition reaction is catalyzed by aldolase. The inhibitors exhibit an activity comparable to sialyl Lewis X with respect to the E-selectin binding assay and high activities in the P- and L-selectin binding assays. The inhibitors are employable for blocking neutrophil inflamatory conditions.
E-, P- 和 L- 选择素结合的抑制剂是通过糖苷醛前体和二羟基丙酮磷酸盐或其衍生物之间的醛缩加反应合成的。醛缩加反应由醛缩酶催化。这些抑制剂在 E- 选择素结合试验中表现出与唾液酸 Lewis X 相当的活性,并且在 P- 和 L- 选择素结合试验中具有高活性。这些抑制剂可用于阻止中性粒细胞炎症病症。