A Single Route to Mammalian N-Glycans Substituted with Core Fucose and Bisecting GlcNAc.
Angew Chem Int Ed Engl
; 57(44): 14543-14549, 2018 10 26.
Article
em En
| MEDLINE
| ID: mdl-30144245
ABSTRACT
The occurrence of α1,6-linked core fucose on the N-glycans of mammalian glycoproteins is involved in tumor progression and reduces the bioactivity of antibodies in antibody-dependent cell-mediated cytotoxicity (ADCC). Since core-fucosylated N-glycans are difficult to isolate from natural sources, only chemical or enzymatic synthesis can provide the desired compounds for biological studies. A general drawback of chemical α-fucosylation is that the chemical assembly of α1,6-linked fucosides is not stereospecific. A robust and general method for the α-selective fucosylation of acceptors with primary hydroxy groups in α/ß ratios exceeding 991 was developed. The high selectivities result from the interplay of an optimized protecting group pattern of the fucosyl donors in combination with the activation principle and the reaction conditions. Selective deprotection yielded versatile azides of all mammalian complex-type core-fucosylated N-glycans with 2-4 antennae and optional bisecting GlcNAc.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polissacarídeos
/
Acetilglucosamina
/
Fucose
Limite:
Animals
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article