Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Host organism: Homo sapiens
Associated disease: respiratory infections [ICD11:
CA45 
];
urinary tract infections (UTI) [ICD11:
GC08 ];
infection due to Klebsiella pneumoniae [ICD11:
XN741 ]
The structure was elucidated in this paperNCBI PubMed ID: 23360863Publication DOI: 10.1016/j.carres.2012.12.018Journal NLM ID: 0043535Publisher: Elsevier
Correspondence: kielbj
mail.nih.gov
Institutions: Program on Developmental and Molecular Immunity, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20892, United States
Carbapenem resistant Klebsiella pneumoniae (CRKP) are isolated with increasing frequency, especially from immunocompromized patients. The capsular polysaccharide (CPS) types of CPKP were not determined. Investigation of two CRKP isolates from a 2011 outbreak at the Clinical Center, the National Institutes of Health, identified a new capsular type shared by the two isolates, similar to K. pneumonia K19 and K34 but structurally different than any published K. pneumoniae CPS repeating unit: The LPS of the two isolates was found to have no O-specific polysaccharide and the chemical structure of the core oligosaccharides agreed with the published data. If this structure type will be prevalent among CPKP isolates, our findings could facilitate rapid diagnosis and help to develop new therapeutic solutions to this antibiotic resistant pathogen.
LPS, structure, capsular polysaccharide, Klebsiella pneumoniae, KPC, CRKP
Structure type: polymer chemical repeating unit
Location inside paper: abstract, p.37, fig.2
Compound class: CPS
Contained glycoepitopes: IEDB_133754,IEDB_136044,IEDB_136105,IEDB_137472,IEDB_141794,IEDB_144825,IEDB_190606,IEDB_225177,IEDB_885823,SB_165,SB_166,SB_187,SB_195,SB_7,SB_88
Methods: 13C NMR, 1H NMR, methylation, NMR-2D, SDS-PAGE, sugar analysis, ESI-MS, mild acid hydrolysis, GC, NMR-1D, immunodiffusion assays
Related record ID(s): 29623, 29624, 29625
NCBI Taxonomy refs (TaxIDs): 573Reference(s) to other database(s): GTC:G57429IZ
Show glycosyltransferases
NMR conditions: in D2O at 298 K
[as TSV]
13C NMR data:
Linkage Residue C1 C2 C3 C4 C5 C6
3,3,2,2 aLRhap 100.9 77.3 71.0 73.4 70.5 17.9
3,3,2 aLRhap 102.0 79.6 71.0 73.4 70.3 17.9
3,3 aLRhap 102.0 79.1 71.2 73.4 70.1 17.9
3 bDGalp 105.6 72.4 80.8 69.7 76.2 62.2
4 aLRhap 101.7 71.4 71.4 73.2 70.2 17.9
aDGalpA 98.9 68.4 80.3 78.3 72.1 ?
1H NMR data:
Linkage Residue H1 H2 H3 H4 H5 H6
3,3,2,2 aLRhap 5.09 4.13 3.90 3.51 3.77 1.29
3,3,2 aLRhap 5.14 4.12 3.90 3.48 3.72 1.28
3,3 aLRhap 5.19 4.09 3.95 3.51 3.82 1.30
3 bDGalp 4.66 3.73 3.73 4.01 3.72 3.75-3.85
4 aLRhap 5.37 4.09 3.78 3.40 3.68 1.24
aDGalpA 5.13 4.08 4.23 4.69 4.92 -
1H/13C HSQC data:
Linkage Residue C1/H1 C2/H2 C3/H3 C4/H4 C5/H5 C6/H6
3,3,2,2 aLRhap 100.9/5.09 77.3/4.13 71.0/3.90 73.4/3.51 70.5/3.77 17.9/1.29
3,3,2 aLRhap 102.0/5.14 79.6/4.12 71.0/3.90 73.4/3.48 70.3/3.72 17.9/1.28
3,3 aLRhap 102.0/5.19 79.1/4.09 71.2/3.95 73.4/3.51 70.1/3.82 17.9/1.30
3 bDGalp 105.6/4.66 72.4/3.73 80.8/3.73 69.7/4.01 76.2/3.72 62.2/3.75-3.85
4 aLRhap 101.7/5.37 71.4/4.09 71.4/3.78 73.2/3.40 70.2/3.68 17.9/1.24
aDGalpA 98.9/5.13 68.4/4.08 80.3/4.23 78.3/4.69 72.1/4.92
1H NMR data:
| Linkage | Residue | H1 | H2 | H3 | H4 | H5 | H6 |
|---|
| 3,3,2,2 | aLRhap | 5.09 | 4.13 | 3.90 | 3.51 | 3.77 | 1.29 |
| 3,3,2 | aLRhap | 5.14 | 4.12 | 3.90 | 3.48 | 3.72 | 1.28 |
| 3,3 | aLRhap | 5.19 | 4.09 | 3.95 | 3.51 | 3.82 | 1.30 |
| 3 | bDGalp | 4.66 | 3.73 | 3.73 | 4.01 | 3.72 | 3.75
3.85 |
| 4 | aLRhap | 5.37 | 4.09 | 3.78 | 3.40 | 3.68 | 1.24 |
| | aDGalpA | 5.13 | 4.08 | 4.23 | 4.69 | 4.92 |
|
|
13C NMR data:
| Linkage | Residue | C1 | C2 | C3 | C4 | C5 | C6 |
|---|
| 3,3,2,2 | aLRhap | 100.9 | 77.3 | 71.0 | 73.4 | 70.5 | 17.9 |
| 3,3,2 | aLRhap | 102.0 | 79.6 | 71.0 | 73.4 | 70.3 | 17.9 |
| 3,3 | aLRhap | 102.0 | 79.1 | 71.2 | 73.4 | 70.1 | 17.9 |
| 3 | bDGalp | 105.6 | 72.4 | 80.8 | 69.7 | 76.2 | 62.2 |
| 4 | aLRhap | 101.7 | 71.4 | 71.4 | 73.2 | 70.2 | 17.9 |
| | aDGalpA | 98.9 | 68.4 | 80.3 | 78.3 | 72.1 | ? |
|
![](nmr_drawer.py?width=750&height=130&nucleus=C&rotate_labels=false&spectrum=[{"s":100.9,"l":"1","c":[0,0,225]},{"s":77.3,"l":"2","c":[0,0,225]},{"s":71,"l":"3","c":[0,0,225]},{"s":73.4,"l":"4","c":[0,0,225]},{"s":70.5,"l":"5","c":[0,0,225]},{"s":17.9,"l":"6","c":[0,0,225]},{"s":102,"l":"1","c":[230,0,30]},{"s":79.6,"l":"2","c":[230,0,30]},{"s":71,"l":"3","c":[230,0,30]},{"s":73.4,"l":"4","c":[230,0,30]},{"s":70.3,"l":"5","c":[230,0,30]},{"s":17.9,"l":"6","c":[230,0,30]},{"s":102,"l":"1","c":[0,165,0]},{"s":79.1,"l":"2","c":[0,165,0]},{"s":71.2,"l":"3","c":[0,165,0]},{"s":73.4,"l":"4","c":[0,165,0]},{"s":70.1,"l":"5","c":[0,165,0]},{"s":17.9,"l":"6","c":[0,165,0]},{"s":105.6,"l":"1","c":[120,0,225]},{"s":72.4,"l":"2","c":[120,0,225]},{"s":80.8,"l":"3","c":[120,0,225]},{"s":69.7,"l":"4","c":[120,0,225]},{"s":76.2,"l":"5","c":[120,0,225]},{"s":62.2,"l":"6","c":[120,0,225]},{"s":101.7,"l":"1","c":[0,192,255]},{"s":71.4,"l":"2","c":[0,192,255]},{"s":71.4,"l":"3","c":[0,192,255]},{"s":73.2,"l":"4","c":[0,192,255]},{"s":70.2,"l":"5","c":[0,192,255]},{"s":17.9,"l":"6","c":[0,192,255]},{"s":98.9,"l":"1","c":[220,0,180]},{"s":68.4,"l":"2","c":[220,0,180]},{"s":80.3,"l":"3","c":[220,0,180]},{"s":78.3,"l":"4","c":[220,0,180]},{"s":72.1,"l":"5","c":[220,0,180]}])
The spectrum also has 1 signal at unknown position (not plotted). |
There is only one chemically distinct structure:
Found 
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