O-Antigen Description

Serogroup:O18 A1A2
Serotype H:
Serotype K:
Strain:TD2158
Structure:
           bDGlc/bDGlcNAc(1->3)        (6<-1)aDGlc
                             |          |
->2)aLRha(1->6)aDGlc(1->4)aDGal(1->3)aDGlcNAc(1->
Comment:- Structure [1]
- aDGal residue is linked in position 3 with either bDGlcNAc or bDGlc corresponding to O18A1 and O18A2 in a 1:1 ratio
NMR
1H-NMR5.49 4.11 3.95 4.31 4.02 3.83 3.83 5.47 3.98 3.85 4.30 3.99 3.83 3.83 5.04 4.15 4.00 3.90 4.26 3.76 4.01 2.09 5.03 4.14 4.00 3.89 4.25 3.76 4.01 2.09 4.99 3.53 3.75 3.58 4.28 3.80 3.91 4.985 3.57 3.78 3.44 3.73 3.78 3.87 4.982 3.57 3.78 3.44 3.73 3.77 3.86 4.95 3.52 3.72 3.56 4.30 3.92 3.96 4.86 4.04 3.94 3.53 3.80 1.35 4.83 4.03 3.93 3.53 3.78 1.34 4.66 3.62 3.58 3.41 3.45 3.74 3.95 2.03 4.65 3.21 3.53 3.37 3.46 3.72 3.93
Solvent: D2O
Temp: 60C
pD:
Ref: TSP 0 ppm
Comment: - 1H-NMR [1]
13C-NMR99.99 68.92 79.10 77.23 72.60 60.65 99.99 68.91 79.45 76.85 72.60 60.59 96.92 52.69 78.51 71.38 71.36 66.37 23.07 174.85 96.78 52.67 78.04 71.48 71.36 66.37 23.07 174.85 99.99 72.71 73.60 69.90 71.36 67.21 98.88 72.40 73.98 70.55 72.77 61.54 98.88 72.40 73.98 70.55 72.77 61.50 99.87 72.77 73.68 69.90 71.11 67.36 98.92 76.91 70.39 73.05 69.82 17.90 98.77 76.74 70.39 73.05 69.77 17.85 104.34 56.71 75.05 71.36 76.63 61.91 23.17 175.27 105.26 74.60 76.68 70.98 76.77 61.89
Solvent: D2O
Temp: 60C
pD:
Ref: TSP 67.40 ppm
Comment: - 13C-NMR [1]
Literature
  • First Author: Zaccheus M. "Structural studies of the O-antigen polysaccharide from Escherichia coli TD2158 having O18 serogroup specificity and aspects of its interaction with the tailspike endoglycosidase of the infecting ba". Carbohydrate Research. 357. (2012), pp 118-25 PubMed: [22704196]