TABLE 1.
Monosaccharide residuec | C1 | C2 | C3 | C4 | C5 | C6 | |
---|---|---|---|---|---|---|---|
H1 | H2 | H3 | H4 | H5 | H6 (6a,6b) | ||
CPS | |||||||
→3)-β-d-GlcpNAc-(1→ | A | 102.7 4.79 |
56.9 3.81 |
82.9 3.62 |
70.2 3.47 |
77.4 3.47 |
62.8 3.71, 3.89 |
→2)-α-l-Rhap-(1→ | B | 101.1 5.03 |
81.3 3.78 |
71.5 3.85 |
73.5 3.46 |
70.4 3.78 |
18.1 1.28 |
→3)-α-l-Rhap-(1→ | C | 103.6 4.86 |
71.4 4.11 |
78.9 3.81 |
73.1 3.55 |
4.05 70.4 |
17.9 1.25 |
→2,3)-α-l-Rhap-(1→ | D | 102.0 5.17 |
78.6 4.23 |
80.3 4.00 |
72.6 3.52 |
70.4 3.82 |
18.1 1.30 |
→2)-α-l-Rhap-(1→ | E | 101.6 5.22 |
81.4 4.11 |
71.4 3.86 |
73.4 3.48 |
70.4 3.79 |
18.1 1.29 |
→4)-β-d-GlcpA-(1→ | F | 105.4 4.69 |
75.2 3.42 |
75.4 3.63 |
80.3 3.63 |
76.8 3.90 |
175.1 |
→3)-α-l-Rhap-(1→ | G | 102.0 4.75 |
71.4 4.02 |
79.5 3.80 |
72.6 3.52 |
70.4 4.00 |
17.9 1.24 |
α-l-Rhap-(1→ | H | 103.6 5.09 |
71.4 4.05 |
71.7 3.82 |
73.9 3.46 |
70.4 3.72 |
17.9 1.25 |
OSd | |||||||
β-d-GlcpNAc-(1→ | A'e | 104.1 4.74 |
57.5 3.75 |
75.3 3.57 |
71.5 3.46 |
77.3 3.45 |
62.3 3.76, 3.92 |
→3)-α-l-Rhap-(1→ | D' | 103.4 5.04 |
71.4 4.27 |
75.3 3.57 |
73.0 3.55 |
70.7 3.96 |
18.2 1.28 |
→3)-α-l-Rhap-(1→ | C' | 101.0 4.97 |
71.8 4.08 |
80.0 3.87 |
72.6 3.52 |
70.8 3.83 |
18.2 1.28 |
→2)-R | B' | 90.9 5.11 |
81.6 3.64 |
61.2 3.74; 3.86 |
Structures of the K71 CPS and OS are shown in Fig. 3. 1H NMR chemical shifts are shown in italics.
R indicates glyceraldehyde in the hydrated form HOCH2CH(O–)CH(OH)2.
Signals for the N-acetyl group of GlcpNAc are at δС 24.0 (Me) and 175.6 (CO), δH 2.07 in the CPS, δС 23.8 (Me) and 176.2 ppm (CO), δH 2.04 in the OS.
OS, oligosaccharide.
Bold face text refers to the residues detected and their order