Structural Elucidation and genetic identification of the O-antigen from a novel serogroup of Escherichia coli strain 2017LL031.
Carbohydr Res
; 517: 108577, 2022 Jul.
Article
in En
| MEDLINE
| ID: mdl-35569241
ABSTRACT
The O-antigen is an important virulence factor involved in the survival, virulence and invasion of bacteria. The bacterial serological types are highly dependent on these surface-exposed and structurally unique O-antigen structures. In this work, the structure of O-antigen from an Escherichia coli strain 2017LL031 was elucidated as a hexasaccharide repeating unit â3)-[ß-D-Glcp-(1 â 2)]-α-L-Rhap-(1 â 3)-[α-D-Quip-(1 â 3)-α-D-GlcpA-(1 â 2)]-ß-L-Fucp-(1 â 3)-ß-D-GlcpNAc-(1â, which is completely different from all known E. coli serogroups. The O-antigen gene cluster (O-AGC) of 2017LL031 was also analyzed and correlates well to its O-Ag. Moreover, the O-AGC of 2017LL031 was deleted and its role in O-Ag biosynthesis was confirmed experimentally. Taken together, our results present that a novel E.coli serotype 2017LL031 is identified.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
O Antigens
/
Escherichia coli
Type of study:
Diagnostic_studies
/
Prognostic_studies
Language:
En
Journal:
Carbohydr Res
Year:
2022
Document type:
Article
Affiliation country:
China