Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Escherichia coli [ICD11:
XN6P4 
]
The structure was elucidated in this paperNCBI PubMed ID: 7534644Journal NLM ID: 0043535Publisher: Elsevier
Institutions: School of Pharmaceutical Sciences, Rhodes University, Grahamstown, 6140, South Africa
The O-specific polysaccharide from Escherichia coli O113 lipopolysaccharide was separated from the core and lipid A by mild acid hydrolysis and purified by GPC. Methylation analysis and 1H and 13C NMR spectroscopic studies of the O-deacetylated polysaccharide allowed the determination of the structure of the pentasaccharide repeating unit of the polysaccharide which can be written as [equation: see text] The position of the O-acetyl groups was not determined.
Lipopolysaccharide, LPS, structure, polysaccharide, O-antigen, Escherichia, Escherichia coli, O-specific, O-specific polysaccharide
Structure type: suggested polymer biological repeating unit
Location inside paper: abstract
Compound class: O-polysaccharide, O-antigen
Contained glycoepitopes: IEDB_130648,IEDB_134627,IEDB_135813,IEDB_136044,IEDB_136906,IEDB_137340,IEDB_137472,IEDB_137473,IEDB_1391961,IEDB_1391963,IEDB_141584,IEDB_141794,IEDB_141807,IEDB_143260,IEDB_151528,IEDB_151531,IEDB_190606,IEDB_885822,SB_165,SB_166,SB_187,SB_195,SB_23,SB_24,SB_7,SB_8,SB_88
Methods: methylation, NMR-2D, NMR, de-O-acetylation
Comments, role: biological repeat frame was based on GNE gene presence; chemical repeat frame is different in the paper
Related record ID(s): 4023, 20673, 24241, 27302
NCBI Taxonomy refs (TaxIDs): 1162729Reference(s) to other database(s): GTC:G95309PZ, GlycomeDB:
33574
Show glycosyltransferases
NMR conditions: in D2O at 313 K
[as TSV]
13C NMR data:
Linkage Residue C1 C2 C3 C4 C5 C6
3,3,4,2 Ac
3,3,4,3 bDGalp 105.85 71.82 73.77 69.5 75.79 62.06
3,3,4 aDGalpN 99.8 49.71 78.15 76.14 70.75 60.65
3,3 aDGalpA 97.06 68.6 69.06 79.32 71.45 172.49
3 aDGalp 100.4 67.8 76.5 66.75 71.2 61.3
2 Ac
bDGlcpN 102.1 55.0 81.16 71.73 75.86 61.68
1H NMR data:
Linkage Residue H1 H2 H3 H4 H5 H6
3,3,4,2 Ac
3,3,4,3 bDGalp 4.46 3.56 3.65 3.95 3.67 3.78-3.78
3,3,4 aDGalpN 4.96 4.22 4.03 4.44 4.39 3.64-3.79
3,3 aDGalpA 5.27 3.95 4.12 4.45 4.88 -
3 aDGalp 5.39 3.94 3.94 4.24 3.91 3.74-3.74
2 Ac
bDGlcpN 4.96 3.86 3.83 3.68 3.44 3.74-3.92
1H/13C HSQC data:
Linkage Residue C1/H1 C2/H2 C3/H3 C4/H4 C5/H5 C6/H6
3,3,4,2 Ac
3,3,4,3 bDGalp 105.85/4.46 71.82/3.56 73.77/3.65 69.5/3.95 75.79/3.67 62.06/3.78-3.78
3,3,4 aDGalpN 99.8/4.96 49.71/4.22 78.15/4.03 76.14/4.44 70.75/4.39 60.65/3.64-3.79
3,3 aDGalpA 97.06/5.27 68.6/3.95 69.06/4.12 79.32/4.45 71.45/4.88
3 aDGalp 100.4/5.39 67.8/3.94 76.5/3.94 66.75/4.24 71.2/3.91 61.3/3.74-3.74
2 Ac
bDGlcpN 102.1/4.96 55.0/3.86 81.16/3.83 71.73/3.68 75.86/3.44 61.68/3.74-3.92
1H NMR data:
| Linkage | Residue | H1 | H2 | H3 | H4 | H5 | H6 |
|---|
| 3,3,4,2 | Ac | |
| 3,3,4,3 | bDGalp | 4.46 | 3.56 | 3.65 | 3.95 | 3.67 | 3.78
3.78 |
| 3,3,4 | aDGalpN | 4.96 | 4.22 | 4.03 | 4.44 | 4.39 | 3.64
3.79 |
| 3,3 | aDGalpA | 5.27 | 3.95 | 4.12 | 4.45 | 4.88 |
|
| 3 | aDGalp | 5.39 | 3.94 | 3.94 | 4.24 | 3.91 | 3.74
3.74 |
| 2 | Ac | |
| | bDGlcpN | 4.96 | 3.86 | 3.83 | 3.68 | 3.44 | 3.74
3.92 |
|
13C NMR data:
| Linkage | Residue | C1 | C2 | C3 | C4 | C5 | C6 |
|---|
| 3,3,4,2 | Ac | |
| 3,3,4,3 | bDGalp | 105.85 | 71.82 | 73.77 | 69.5 | 75.79 | 62.06 |
| 3,3,4 | aDGalpN | 99.8 | 49.71 | 78.15 | 76.14 | 70.75 | 60.65 |
| 3,3 | aDGalpA | 97.06 | 68.6 | 69.06 | 79.32 | 71.45 | 172.49 |
| 3 | aDGalp | 100.4 | 67.8 | 76.5 | 66.75 | 71.2 | 61.3 |
| 2 | Ac | |
| | bDGlcpN | 102.1 | 55.0 | 81.16 | 71.73 | 75.86 | 61.68 |
|
There is only one chemically distinct structure:
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Found 1 record.
Displayed record 1
