Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Escherichia coli [ICD11:
XN6P4 
]
The structure was elucidated in this paperNCBI PubMed ID: 25988496Publication DOI: 10.1016/j.carres.2015.04.014Journal NLM ID: 0043535Publisher: Elsevier
Correspondence: zdorovenkoe
mail.ru (E.L. Zdorovenko)
Institutions: N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia, TEDA School of Biological Sciences and Biotechnology, Nankai University, TEDA, Tianjin, China, S. N. Winogradsky Institute of Microbiology, Russian Academy of Sciences, 117312 Moscow, Russia, Moscow Institute of Physics and Technology State University, 141700 Dolgoprudny, Moscow Region, Russia
The following structure of the O-polysaccharide of Escherichia coli HS1/2 serving as a primary receptor for bacteriophage DT57-12 was elucidated by sugar analysis along with 1D and 2D (1)H and (13)C NMR spectroscopy: This structure is shared by E. coli O87 type strain. Putatively assigned functions of genes in the O-antigen gene cluster of E. coli O87 are consistent with the O-polysaccharide structure established.
Lipopolysaccharide, O-specific polysaccharide, bacterial polysaccharide structure, O-antigen gene cluster, Escherichia coli O87
Structure type: polymer chemical repeating unit
Location inside paper: abstract, p.16
Compound class: O-polysaccharide, O-antigen
Contained glycoepitopes: IEDB_130648,IEDB_136095,IEDB_136906,IEDB_137472,IEDB_137473,IEDB_141794,IEDB_151528,IEDB_190606,SB_7
Methods: 13C NMR, 1H NMR, NMR-2D, DNA sequencing, sugar analysis, GLC, mild acid hydrolysis, NMR-1D, GPC, bioinformatic analysis
Comments, role: E. coli O87 (laboratory stock No. M1269)
NCBI Taxonomy refs (TaxIDs): 562Reference(s) to other database(s): GTC:G93997RM
Show glycosyltransferases
NMR conditions: in D2O at 293 K
[as TSV]
13C NMR data:
Linkage Residue C1 C2 C3 C4 C5 C6
3,3,4 bDGalf 110.3 81.6 85.8 82.5 71.5 64.0
3,3 aDGalp 95.6 68.3 70.5 77.9 71.8 62.1
3,4 Ac 174.0 21.6
3 aDGalpA 98.3 67.9 72.3 69.4 71.8 175.0
2 Ac 176.2 23.6
bDGalpN 102.7 52.0 78.6 66.1 76.1 62.3
1H NMR data:
Linkage Residue H1 H2 H3 H4 H5 H6
3,3,4 bDGalf 5.19 4.18 4.22 4.14 3.95 3.67-3.69
3,3 aDGalp 5.20 3.92 4.08 3.94 4.08 3.72-3.76
3,4 Ac - 2.10
3 aDGalpA 5.21 4.02 4.18 5.89 4.32 -
2 Ac - 2.03
bDGalpN 4.67 4.02 3.92 4.18 3.72 3.81-3.85
1H/13C HSQC data:
Linkage Residue C1/H1 C2/H2 C3/H3 C4/H4 C5/H5 C6/H6
3,3,4 bDGalf 110.3/5.19 81.6/4.18 85.8/4.22 82.5/4.14 71.5/3.95 64.0/3.67-3.69
3,3 aDGalp 95.6/5.20 68.3/3.92 70.5/4.08 77.9/3.94 71.8/4.08 62.1/3.72-3.76
3,4 Ac 21.6/2.10
3 aDGalpA 98.3/5.21 67.9/4.02 72.3/4.18 69.4/5.89 71.8/4.32
2 Ac 23.6/2.03
bDGalpN 102.7/4.67 52.0/4.02 78.6/3.92 66.1/4.18 76.1/3.72 62.3/3.81-3.85
1H NMR data:
| Linkage | Residue | H1 | H2 | H3 | H4 | H5 | H6 |
|---|
| 3,3,4 | bDGalf | 5.19 | 4.18 | 4.22 | 4.14 | 3.95 | 3.67
3.69 |
| 3,3 | aDGalp | 5.20 | 3.92 | 4.08 | 3.94 | 4.08 | 3.72
3.76 |
| 3,4 | Ac |
| 2.10 | |
| 3 | aDGalpA | 5.21 | 4.02 | 4.18 | 5.89 | 4.32 |
|
| 2 | Ac |
| 2.03 | |
| | bDGalpN | 4.67 | 4.02 | 3.92 | 4.18 | 3.72 | 3.81
3.85 |
|
13C NMR data:
| Linkage | Residue | C1 | C2 | C3 | C4 | C5 | C6 |
|---|
| 3,3,4 | bDGalf | 110.3 | 81.6 | 85.8 | 82.5 | 71.5 | 64.0 |
| 3,3 | aDGalp | 95.6 | 68.3 | 70.5 | 77.9 | 71.8 | 62.1 |
| 3,4 | Ac | 174.0 | 21.6 | |
| 3 | aDGalpA | 98.3 | 67.9 | 72.3 | 69.4 | 71.8 | 175.0 |
| 2 | Ac | 176.2 | 23.6 | |
| | bDGalpN | 102.7 | 52.0 | 78.6 | 66.1 | 76.1 | 62.3 |
|
There is only one chemically distinct structure:
Found 
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