title: Structural and genetic evidence that the Escherichia coli O148 O antigen is the precursor of the Shigella dysenteriae type 1 O antigen and identification of a glucosyltransferase gene.
abstract: Shigella dysenteriae type 1 is the most virulent serotype of Shigella. Enterotoxigenic Escherichia coli O148 is pathogenic and can cause diarrhoea. The following structure was established for the tetrasaccharide repeating unit of the E. coli O148 O antigen: -->3)-alpha-L-Rhap-(1-->3)-alpha-L-Rhap-(1-->2)-alpha-D-Glcp-(1-->3)-alpha-D-GlcpNAc-(1-->. This differs from the structure reported earlier for S. dysenteriae type 1 by having a glucose (Glc) residue in place of a galactose (Gal) residue. The two bacteria also have the same genes for O antigen synthesis, with the same organization and high level of DNA identity, except that in S. dysenteriae type 1 wbbG is interrupted by a deletion, and a galactosyltransferase gene wbbP located on a plasmid is responsible for the transfer of galactose to make a novel antigenic epitope of the O antigen. The S. dysenteriae type 1 O antigen was reconstructed by replacing the E. coli O148 wbbG gene with the wbbP gene, and it had the LPS structure and antigenic properties of S. dysenteriae type 1, indicating that the S. dysenteriae type 1 O antigen evolved from that of E. coli O148. It was also confirmed that wbbG of E. coli O148 is a glucosyltransferase gene, and two serotype-specific genes of E. coli O148 and S. dysenteriae type 1 were identified.
authors.affiliation: Tianjin Key Laboratory for Microbial Functional Genomics, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.|TEDA School of Biological Sciences and Biotechnology, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.
authors.forename: Lu
authors.initials: L
authors.lastname: Feng
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation.
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Perepelov
authors.affiliation: Tianjin Key Laboratory for Microbial Functional Genomics, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.|TEDA School of Biological Sciences and Biotechnology, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.
authors.forename: Guang
authors.initials: G
authors.lastname: Zhao
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation.
authors.forename: Sergei D
authors.initials: SD
authors.lastname: Shevelev
authors.affiliation: Tianjin Key Laboratory for Microbial Functional Genomics, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.|TEDA School of Biological Sciences and Biotechnology, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Wang
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation.
authors.forename: Sof'ya N
authors.initials: SN
authors.lastname: Senchenkova
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Shashkov
authors.affiliation: College of Life Sciences, Nankai University, Tianjin 300071, P. R. China.
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Geng
authors.affiliation: School of Molecular and Microbial Biosciences (G08), University of Sydney, Sydney, NSW 2006, Australia.
authors.forename: Peter R
authors.initials: PR
authors.lastname: Reeves
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation.
authors.forename: Yuriy A
authors.initials: YA
authors.lastname: Knirel
authors.affiliation: Tianjin Key Laboratory for Microbial Functional Genomics, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.|TEDA School of Biological Sciences and Biotechnology, Nankai University, 23 HongDa Street, TEDA, Tianjin 300457, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics*; D001692:Biological Transport; D004926:Escherichia coli / Q000276:immunology*; D005798:Genes, Bacterial; D005947:Glucose / Q000378:metabolism; D005964:Glucosyltransferases / Q000145:classification / Q000235:genetics; D008969:Molecular Sequence Data; D005810:Multigene Family; D019081:O Antigens / Q000737:chemistry* / Q000235:genetics*; D010957:Plasmids / Q000235:genetics; D011498:Protein Precursors / Q000737:chemistry* / Q000235:genetics*; D017386:Sequence Homology, Amino Acid; D012762:Shigella dysenteriae / Q000276:immunology*; D013045:Species Specificity
chemical_list: D001426:Bacterial Proteins; D019081:O Antigens; D011498:Protein Precursors; D005964:Glucosyltransferases; D005947:Glucose