Facile Formation of β‐thioGlcNAc Linkages to Thiol‐Containing Sugars, Peptides, and Proteins using a Mutant GH20 Hexosaminidase
作者:Gregor Tegl、John Hanson、Hong‐Ming Chen、David H Kwan、Andrés G. Santana、Stephen G. Withers
DOI:10.1002/anie.201809928
日期:2019.2.4
including S-GlcNAcylated proteins, is reported, using a thioglycoligase derived from a GH20hexosaminidase from Streptomyces plicatus in which the catalytic acid/base glutamate has been mutated to an alanine (SpHex E314A). This robust, easily-prepared, engineered enzyme uses GlcNAc and GalNAc donors and couples them to a remarkably diverse set of thiol acceptors. Thioglycoligation using 3-, 4-, and 6-thiosugar
Syntheses of p-nitrophenyl 3- and 4-thio-β-d-glycopyranosides
作者:Hong-Ming Chen、Stephen G. Withers
DOI:10.1016/j.carres.2010.10.001
日期:2010.12
Thioglycosides have proved to be useful, enzymatically stable analogs of glycosides for structural and mechanistic studies and their synthesis is considerably simplified through the use of thioglycoligases. As part of an investigation into the use of thioglycosides as potential pharmacological chaperones, and as components of glycoproteins and glycolipids, the syntheses of p-nitrophenyl 3-thio-β-D-galactopyranoside