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Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
Published on: October 4, 2017
Stereoselective Glycosylation for 1,2-cis-Aminoglycoside Assembly by Cooperative Atom Transfer Catalysis
Hongze Li1, Dakang Zhang1, Chong Li1
1Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States.
Abstract:
We report here a new catalytic method for exclusively 1,2-cis-α-selective glycosylation that assembles a wide variety of 1,2-cis-aminoglycosidic linkages in complex glycans and glycoconjugates. Mechanistic studies revealed a unique glycosylation mechanism in which the iron catalyst activates a glycosyl acceptor and an oxidant when it facilitates the cooperative atom transfer of both moieties to a glycosyl donor in an exclusively cis-selective manner. This catalytic approach is effective for a broad range of glycosyl donors and acceptors, and it can be operated in a reiterative fashion and scaled up to the multigram scale.
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