Non-natural aldofuranosides as substrates of a β-glucosidase
摘要:
Based on glycosidase inhibitory activities of some known 1,4-iminoalditols, four aldofuranosides, (4-nitro)phenyl beta-D-glucofuranoside, -beta-D-galactofuranoside, -alpha-L-idofuranoside and -alpha-L-altrofuranoside, were identified as possible substrates of glucosidases and galactosidases. Three of them were found to be accepted by the beta-glucosidase from Agrobacterium sp. (C) 2004 Elsevier Ltd. All rights reserved.
The synthesis of a tetra beta(1 -> 5) galactofuranoside was achieved using a thioglycoside donor with a methyl tert-butyl phenyl thio leaving group. This tetrasaccharide was conjugated to biotin and validated as antigen with the monoclonal antibody used for clinical detection of Aspergillus fumigatus galactomannan on streptavidin-coated microplates. Then we have shown its ability to detect antibodies associated with A. fumigatus induced disease by using sera from patients with Allergic broncho-pulmonary aspergillosis (ABPA) and correlated the results of antibody detection with those gained with a commercially available diagnostic test. (C) 2010 Elsevier Ltd. All rights reserved.