Enzymatic synthesis of alkyl arabinofuranosides using a thermostable α-l-arabinofuranosidase
摘要:
A thermostable alpha-L-arabinofuranosidase was tested for its ability to perform transglycosylation with different alcohol acceptors. Reactions were characterized by high rates with optimal synthesis being obtained within 10 min. Both primary and secondary alcohols could act as acceptors in transarabinosylation but yields of alkyl arabinosides decreased with increasing alkyl chain length. (C) 2002 Elsevier Science Ltd. All rights reserved.
-arabinofuranosides of various aliphatic alcohols were synthesized and then investigated by n.m.r. spectroscopy. The 13 C-n.m.r. glycosylation shift of these l -arabinofuranosides is very similar to that of l -arabinopyranosides and other glycopyranosides reported previously. The 3 J H-1,H-2 value of these α- l -arabinofuranosides is significantly different from that of the β anomers and can be used
were selected on their ability to catalyze the transglycosylationreaction of p-nitrophenyl α-L-arabinofuranoside (pNP-Araf) used as a donor and various aliphatic alcohols as acceptors. This screening strategy underlined 5 interesting clones, each one corresponding to one acceptor. They appeared to be much more efficient in the transglycosylationreaction compared to the wild type enzyme whereas no self-condensation
ONE STEP ENZYMATIC PROCESS FOR PRODUCING ALKYL FURANOSIDES
申请人:ECOLE NATIONALE SUPÉRIEURE DE CHIMIE DE RENNES (ENSCR)
公开号:US20150125888A1
公开(公告)日:2015-05-07
A process for enzymatically converting a furanoside substrate in a product of interest, includes contacting the substrate with an enzyme in presence of an alcohol acceptor, wherein the enzyme is preferably Araf51, and wherein the product is preferably an alkyl furanoside. The mutant Araf51 enzyme showing improved transglycosylation activity in comparison with the native wild-type (wt) Araf51 enzyme, and a method for screening the mutants are also described.
Enzymatic synthesis of alkyl arabinofuranosides using a thermostable α-l-arabinofuranosidase
作者:Caroline Rémond、Mounir Ferchichi、Nathalie Aubry、Richard Plantier-Royon、Charles Portella、Michael J. O'Donohue
DOI:10.1016/s0040-4039(02)02381-x
日期:2002.12
A thermostable alpha-L-arabinofuranosidase was tested for its ability to perform transglycosylation with different alcohol acceptors. Reactions were characterized by high rates with optimal synthesis being obtained within 10 min. Both primary and secondary alcohols could act as acceptors in transarabinosylation but yields of alkyl arabinosides decreased with increasing alkyl chain length. (C) 2002 Elsevier Science Ltd. All rights reserved.