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Endo ‐α‐Mannosidase‐Catalyzed Transglycosylation
Author(s) -
Iwamoto Shogo,
Kasahara Yuta,
Yoshimura Yayoi,
Seko Akira,
Takeda Yoichi,
Ito Yukishige,
Totani Kiichiro,
Matsuo Ichiro
Publication year - 2017
Publication title -
chembiochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.05
H-Index - 126
eISSN - 1439-7633
pISSN - 1439-4227
DOI - 10.1002/cbic.201700111
Subject(s) - mannosidase , chemistry , glycosyl , glycoside hydrolase , mutant , mannose , glycosylation , golgi apparatus , enzyme , glycosyl donor , glycosyltransferase , biochemistry , stereochemistry , endoplasmic reticulum , gene
Abstract In order for facilitating the synthesis of oligosaccharides, transglycosylation reactions mediated by glycoside hydrolases have been studied in various contexts. In this study, we examined the transglycosylating activity of a Golgi endo ‐ α‐mannosidase. We prepared various glycosyl donors and acceptors, and recombinant human Golgi endo ‐α‐mannosidase and its various mutants were expressed. The enzyme was able to mediate transglycosylation from α‐glycosyl‐fluorides. Systematic screening of various point mutants revealed that the E407D mutant had excellent transglycosylation activity and extremely low hydrolytic activity. Substrate specificity analysis revealed that minimum motif required for glycosyl acceptor is Manα1– 2Man. The synthetic utility of the enzyme was demonstrated by generation of a high‐mannose‐type undecasaccharide (Glc 1 Man 9 GlcNAc 2 ).