Chemoenzymatic synthesis of 2-azidoethyl-ganglio-oligosaccharides GD3, GT3, GM2, GD2, GT2, GM1, and GD1a

被引：83

作者：

Blixt, O

Vasiliu, D

Allin, K

Jacobsen, N

Warnock, D

Razi, N

Paulson, JC

Bernatchez, S

Gilbert, M

Wakarchuk, W

机构：

[1] Scripps Res Inst, Dept Mol Biol, Consortium Funct Glycom, La Jolla, CA 92037 USA

[2] Natl Res Council Canada, Inst Biol Sci, Ottawa, ON K1A 0R6, Canada

来源：

CARBOHYDRATE RESEARCH | 2005年 / 340卷 / 12期

关键词：

ganglioside; oligosaccharide; chemoenzymatic; synthesis; glycosyltransferase;

D O I：

10.1016/j.carres.2005.06.008

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We have synthesized several ganglio-oligosaccharide structures using glycosyltransferases from Campylobacter jejuni. The enzymes, alpha-(2 -> 3/8)-sialyltransferase (Cst-II), beta-(1 -> 4)-N-acetylgalactosaminyltransferase (CgtA), and beta-(1 -> 3)-galactosyltransferase (CgtB), were produced in large-scale fermentation from Escherichia coli and further characterized based on their acceptor specificities. 2-Azidoethyl-glycosides corresponding to the oligosaccharides of GD3 (alpha-(D)-Neup5Ac-(2 -> 8)-alpha-(D)-Neup5Ac-(2 -> 3)-beta-(D)-Galp-(1 -> 4) -beta-(D)-Glcp-), GT3 (alpha-(D)-Neup5Ac-(2 -> 8)-alpha-(D)-Neup5Ac-(2 -> 8)-alpha-(D)-Neup5Ac-(2 -> 3)-beta-(D)-Galp-(1 -> 4)-beta-(D)-Glcp-), GM2 (beta-(D)-GalpNAc-(1 -> 4)-[alpha-(D)-Neup5Ac-(2 -> 3)]-beta-(D)-Galp-(1 -> 4)-beta-(D)-Glcp-), GD2 (beta-(D)-GalpNAc-(1 -> 4)-[alpha-(D)-Neup5Ac-(2 -> 8)-alpha-(D)-Neup5Ac-(2 -> 3)]-beta-(D)-Galp-(1 -> 4)-beta-(D)-Glcp-), GT2 (beta-(D)-GalpNAc-(1 -> 4)-[(alpha-(D)-Neup5Ac-(2 -> 8)]-beta-(D)-Neup5Ac-(2 -> 8)-alpha-(D)-Neup5Ac-(2 -> -> 3)beta-(D)-Galp-(1 -> 4)-beta-(D)-Glcp-), and GM1 (beta-(D)-Galp-(1 -> 3)-beta-(D)-GalpNAc-(1 -> 4)-[alpha-(D)-Neup5Ac-(2 -> 3)]-beta-(D)-Galp(1 -> 4)-beta-(D)-Glcp-) were synthesized in high yields (gram-scale). In addition, a mammalian a-(2 3)-sialyltransferase (ST3Gal 1) was used to sialylate GM1 and generate GD1a (alpha-(D)-Neup5Ac-(2 -> 3)-beta-(D)-Galp-(1 -> 3)-beta-(D)-GalpNAc-(1 -> 4)-[alpha-(D)-Neup5Ac-(2 -> 3)]-beta-(D)-Galp-(1 -> 4)-beta-(D)-Glcp-) oligosaccharide. We also cloned and expressed a rat UDP-N-acetylglucosamine-4 '-epimerase (GaINAcE) in E. coli AD202 cells for cost saving in situ conversion of less expensive UDP-GIcNAc to UDP-GaINAc. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1963 / 1972

页数：10

共 35 条

[1] SECY PROTEIN, A MEMBRANE-EMBEDDED SECRETION FACTOR OF ESCHERICHIA-COLI, IS CLEAVED BY THE OMPT PROTEASE INVITRO [J].