Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Escherichia coli [ICD11:
XN6P4 
]
The structure was elucidated in this paperNCBI PubMed ID: 1964866Publication DOI: 10.1016/0008-6215(90)80093-iJournal NLM ID: 0043535Publisher: Elsevier
Institutions: Max-Planck-Institut für Immunbiologie, Freiburg-Zähringen, F.R.G.
The structure of the K24 antigen of Escherichia coli O83:K24:H31 was elucidated by determination of composition and by 1H-, 13C-, and 31P-n.m.r. spectroscopy of the polymer and of a Kdo-glycerol (Gro) glycoside, obtained by mild alkaline hydrolysis and subsequent incubation with alkaline phosphatase. The K24 antigen has the repeating unit -7)-α-Kdop-(2-1)-Gro-(3-P. In the polymer, 56% of the repeating units are O-acetylated at C-4 of Kdo, approximately 28% at C-5 of Kdo, and approximately 16% are not acetylated.
Structure type: polymer chemical repeating unit
Location inside paper: table I, p.142, K24-3
Compound class: K-antigen
Contained glycoepitopes: IEDB_130650,IEDB_130695
Methods: 13C NMR, 1H NMR, 31P NMR, GLC
Comments, role: E. coli H45 (083:K24:H31); 16% of the repeating units were not acetylated, 56% were O-acetylated at C-4 of Kdop, and 28% at C-5 of Kdop.
Related record ID(s): 2642, 2643, 116103
NCBI Taxonomy refs (TaxIDs): 562Reference(s) to other database(s): GTC:G22018OM
Show glycosyltransferases
NMR conditions: in D2O at 298(C) K
[as TSV]
13C NMR data:
Linkage Residue C1 C2 C3 C4 C5 C6 C7 C8
0,3,4 56%Ac 175.6 21.9
0,3 aXKdop 174.5 101.1 32.6 70.8 65.0 70.9 74.6 62.2
0 x?Gro 65.3 70.6 68.2
P
1H NMR data:
missing...
13C NMR data:
| Linkage | Residue | C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 |
|---|
| 0,3,4 | 56%Ac | 175.6 | 21.9 | |
| 0,3 | aXKdop | 174.5 | 101.1 | 32.6 | 70.8 | 65.0 | 70.9 | 74.6 | 62.2 |
| 0 | x?Gro | 65.3 | 70.6 | 68.2 | |
| | P | |
|
There is only one chemically distinct structure:
Found 
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