Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Escherichia coli [ICD11:
XN6P4 
]
The structure was elucidated in this paperNCBI PubMed ID: 2692813Publication DOI: 10.1016/0008-6215(89)85115-8Journal NLM ID: 0043535Publisher: Elsevier
Institutions: School of Pharmaceutical Sciences, Rhodes University, Grahamstown, South Africa
The structure of the capsular polysaccharide from Escherichia coli O8:K8:H4 has been elucidated, using mainly methylation analysis, Smith degradation, and 1D- and 2D-n.m.r. spectroscopy. The polysaccharide, after removal of bound lipid, was found to be composed of repeating units of the linear tetrasaccharide. (sequence; see text)
Structure type: polymer chemical repeating unit
Location inside paper: abstract, p.160, structure 1, table I
Compound class: K-antigen
Contained glycoepitopes: IEDB_115136,IEDB_130648,IEDB_136044,IEDB_137340,IEDB_137472,IEDB_137473,IEDB_140630,IEDB_141794,IEDB_141807,IEDB_142078,IEDB_150899,IEDB_151531,IEDB_153216,IEDB_153510,IEDB_190606,IEDB_423153,SB_137,SB_165,SB_166,SB_187,SB_195,SB_29,SB_7,SB_88
Methods: methylation, NMR-2D, Smith degradation
Related record ID(s): 2609, 2610
NCBI Taxonomy refs (TaxIDs): 562Reference(s) to other database(s): GTC:G47333OR, GlycomeDB:
5862
Show glycosyltransferases
NMR conditions: in D2O at 313 K
[as TSV]
13C NMR data:
Linkage Residue C1 C2 C3 C4 C5 C6
3,3,2,2 Ac 173.172-174.750 23.184
3,3,2 bDGalpN 102.531 51.999 81.602 68.711 75.718 61.523
3,3 bDGalp 100.741 78.994 74.505 69.621 75.596 61.978
3,2 Ac 173.172-174.750 23.184
3 aDGlcpN 98.102 52.939 75.509 68.287 72.108 60.977
4 Ac 175.417 21.212
bDGlcpA 104.593 72.381 78.508 73.866 74.019 ?
1H NMR data:
Linkage Residue H1 H2 H3 H4 H5 H6
3,3,2,2 Ac - 2.018
3,3,2 bDGalpN 4.786 4.039 3.812 4.141 3.651 3.746-3.746
3,3 bDGalp 4.581 3.665 3.702 3.885 3.625 3.753-3.834
3,2 Ac - 2.018
3 aDGlcpN 5.086 4.053 3.991 3.673 4.171 3.810-3.836
4 Ac - 2.090
bDGlcpA 4.566 3.511 3.892 4.998 3.790 -
1H/13C HSQC data:
Linkage Residue C1/H1 C2/H2 C3/H3 C4/H4 C5/H5 C6/H6
3,3,2,2 Ac 23.184/2.018
3,3,2 bDGalpN 102.531/4.786 51.999/4.039 81.602/3.812 68.711/4.141 75.718/3.651 61.523/3.746-3.746
3,3 bDGalp 100.741/4.581 78.994/3.665 74.505/3.702 69.621/3.885 75.596/3.625 61.978/3.753-3.834
3,2 Ac 23.184/2.018
3 aDGlcpN 98.102/5.086 52.939/4.053 75.509/3.991 68.287/3.673 72.108/4.171 60.977/3.810-3.836
4 Ac 21.212/2.090
bDGlcpA 104.593/4.566 72.381/3.511 78.508/3.892 73.866/4.998 74.019/3.790
1H NMR data:
| Linkage | Residue | H1 | H2 | H3 | H4 | H5 | H6 |
|---|
| 3,3,2,2 | Ac |
| 2.018 | |
| 3,3,2 | bDGalpN | 4.786 | 4.039 | 3.812 | 4.141 | 3.651 | 3.746
3.746 |
| 3,3 | bDGalp | 4.581 | 3.665 | 3.702 | 3.885 | 3.625 | 3.753
3.834 |
| 3,2 | Ac |
| 2.018 | |
| 3 | aDGlcpN | 5.086 | 4.053 | 3.991 | 3.673 | 4.171 | 3.810
3.836 |
| 4 | Ac |
| 2.090 | |
| | bDGlcpA | 4.566 | 3.511 | 3.892 | 4.998 | 3.790 |
|
|
13C NMR data:
| Linkage | Residue | C1 | C2 | C3 | C4 | C5 | C6 |
|---|
| 3,3,2,2 | Ac | 173.172
174.750 | 23.184 | |
| 3,3,2 | bDGalpN | 102.531 | 51.999 | 81.602 | 68.711 | 75.718 | 61.523 |
| 3,3 | bDGalp | 100.741 | 78.994 | 74.505 | 69.621 | 75.596 | 61.978 |
| 3,2 | Ac | 173.172
174.750 | 23.184 | |
| 3 | aDGlcpN | 98.102 | 52.939 | 75.509 | 68.287 | 72.108 | 60.977 |
| 4 | Ac | 175.417 | 21.212 | |
| | bDGlcpA | 104.593 | 72.381 | 78.508 | 73.866 | 74.019 | ? |
|
![](nmr_drawer.py?width=750&height=130&nucleus=C&rotate_labels=false&spectrum=[{"s":173.96,"l":"1","c":[0,0,0]},{"s":23.184,"l":"2","c":[0,0,0]},{"s":102.531,"l":"1","c":[0,0,225]},{"s":51.999,"l":"2","c":[0,0,225]},{"s":81.602,"l":"3","c":[0,0,225]},{"s":68.711,"l":"4","c":[0,0,225]},{"s":75.718,"l":"5","c":[0,0,225]},{"s":61.523,"l":"6","c":[0,0,225]},{"s":100.741,"l":"1","c":[230,0,30]},{"s":78.994,"l":"2","c":[230,0,30]},{"s":74.505,"l":"3","c":[230,0,30]},{"s":69.621,"l":"4","c":[230,0,30]},{"s":75.596,"l":"5","c":[230,0,30]},{"s":61.978,"l":"6","c":[230,0,30]},{"s":173.96,"l":"1","c":[0,0,0]},{"s":23.184,"l":"2","c":[0,0,0]},{"s":98.102,"l":"1","c":[0,165,0]},{"s":52.939,"l":"2","c":[0,165,0]},{"s":75.509,"l":"3","c":[0,165,0]},{"s":68.287,"l":"4","c":[0,165,0]},{"s":72.108,"l":"5","c":[0,165,0]},{"s":60.977,"l":"6","c":[0,165,0]},{"s":175.417,"l":"1","c":[0,0,0]},{"s":21.212,"l":"2","c":[0,0,0]},{"s":104.593,"l":"1","c":[120,0,225]},{"s":72.381,"l":"2","c":[120,0,225]},{"s":78.508,"l":"3","c":[120,0,225]},{"s":73.866,"l":"4","c":[120,0,225]},{"s":74.019,"l":"5","c":[120,0,225]}])
The spectrum also has 1 signal at unknown position (not plotted). |
There is only one chemically distinct structure:
report error
Found 1 record.
Displayed record 1
