Structural investigation of an extracellular polysaccharide produced by the cariogenic bacterium Streptococcus mutans strain UA159.
Carbohydr Polym
; 90(1): 675-82, 2012 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-24751092
ABSTRACT
The structure of an extracellular polysaccharide EPS159 produced from sucrose by Streptococcus mutans UA159 was investigated through the main oligosaccharides obtained from partial acid hydrolysis, monosaccharide/methylation analysis, and 1D/2D (1)H NMR spectroscopy. The results showed that EPS159 contained terminal, 3-substituted, 6-substituted, and 3,6-disubstituted α-D-glucopyranose residues in a molar percentage of 14, 18, 54, and 14%. The backbone of EPS159 was composed of â6)Glcp(1â residues, and about 20% of the â6)Glcp(1â residues was substituted at 3-OH by â3)Glcp(1â and/or Glcp(1â residues to form side chains. A composite model of EPS159, that includes all identified structural features, was formulated [Formula, see text].
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polissacarídeos
/
Streptococcus mutans
/
Cariogênicos
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
China