O-glycosidically linked N-acetylglucosamine-bound oligosaccharides from glycoproteins of Trypanosoma cruzi.
In this report we describe studies on the structures of the O-linked carbohydrate units in cell-surface glycoproteins of epimastigote forms of the G-strain of Trypanosoma cruzi. Mild alkaline reductive degradation of the 38/43 kDa glycoproteins resulted in beta-elimination of glycosylated threonine and/or serine residues, and the liberation of N-acetylglucosaminitol, galactobiosyl-, galactotriosyl-, galactotetraosyl- and galactopentaosyl-N-acetylglucosaminitol. The structures of these oligosaccharide alditols were established by n.m.r. spectroscopy and methylation analysis as: Galf beta 1-4(Galp beta 1-6)GlcNAc-ol; Galp beta 1-3Galp beta 1-6(Galf beta 1-4)GlcNAc-ol; [(Galp beta 1-3)(Galp beta 1-2)Galp beta 1-6](Galf beta 1-4)GlcNAc-ol; [(Galp beta 1-3)(Galp beta 1-2)Galp beta 1-6](Galp beta 1-2Galf beta 1-4)GlcNAc-ol.
Instituto de Microbiolgia CCS-bloco I, Universidade Federal do Rio de Janeiro, Brasil.
J O
JO
Previato
C
C
Jones
L P
LP
Gonçalves
R
R
Wait
L R
LR
Travassos
L
L
Mendonça-Previato
D000117:Acetylglucosamine / Q000737:chemistry*; D000818:Animals; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D006023:Glycoproteins / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009844:Oligosaccharides / Q000737:chemistry* / Q000302:isolation & purification; D014349:Trypanosoma cruzi / Q000737:chemistry*
D006023:Glycoproteins; D009844:Oligosaccharides; D000117:Acetylglucosamine