Department of Immunochemistry, Ludwik Hirszfeld Institute Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Wroclaw, Poland
The herein presented complete structure of the core oligosaccharide of lipopolysaccharide (LPS) P. shigelloides Polish Collection of Microorganisms (PCM) 2231 (serotype O17) was investigated by (1)H, (13)C NMR spectroscopy, mass spectrometry, chemical analyses and serological methods. The core oligosaccharide is composed of an undecasaccharide, which represents the second core type identified for P. shigelloides serotype O17 LPS. This structure is similar to that of the core oligosaccharide of P. shigelloides strains 302-73 (serotype O1) and 7-63 (serotype O17) and differs from these only by one sugar residue. Serological screening of 55 strains of P. shigelloides with the use of serum against identified core oligosaccharide conjugated with bovine serum albumin (BSA) indicated the presence of similar structures in the LPS core region of 28 O-serotypes. This observation suggests that the core oligosaccharide structure present in strain PCM 2231 could be the most common type among P. shigelloides lipopolysaccharides.
13C NMR, 1H NMR, methylation, NMR-2D, GC-MS, SDS-PAGE, sugar analysis, mild acid hydrolysis, MALDI-TOF MS, NMR-1D, serological methods, immunoblotting, mild acid hydrolysismethylation
13C NMR data:
Linkage Residue C1 C2 C3 C4 C5 C6 C7 C8
5,3,2 %bDGlcp 103.5 74.0 75.4 69.9 76.2 61.3
5,3,3,4,6,4,3,2 Ac 175.3 23.0
5,3,3,4,6,4,3 aLAltpNA 101.7 52.2 68.8 69.9 78.7 175.4
5,3,3,4,6,4,2 Ac 174.7 23.0
5,3,3,4,6,4 bDFucpN4N 101.9 51.6 76.5 55.4 68.1 16.3
5,3,3,4,6,2 Ac 175.4 23.0
5,3,3,4,6 bDGlcpN 102.2 55.9 73.0 79.1 75.3 60.8
5,3,3,4 aDGlcpN 97.0 54.9 70.3 70.0 71.6 68.6
5,3,3 aDGalpA 102.1 69.2 69.0 80.1 72.3 175.6
5,3,7,7,4 %aDGlcpN 95.1 55.0 70.3 70.0 73.0 60.7
5,3,7,7 aDGalpA 99.7 68.8 69.7 77.3 70.6 176.5
5,3,7 aXLDmanHepp 103.2 70.9 71.2 66.7 73.2 68.4 72.0
5,3 aXLDmanHepp 99.7 78.9 79.3 66.4 73.2 69.1 73.6
5,4 bDGalp 104.2 72.2 73.1 71.0 75.8 62.6
5 aXLDmanHepp 101.3 71.1 75.3 75.1 72.0 69.2 63.8
?XKdop ? ? 34.4 66.4 75.3 70.0 72.1 64.1
1H NMR data:
Linkage Residue H1 H2 H3 H4 H5 H6 H7 H8
5,3,2 %bDGlcp 4.59 3.22 3.51 3.45 3.59 3.78-3.90
5,3,3,4,6,4,3,2 Ac - 2.00
5,3,3,4,6,4,3 aLAltpNA 4.88 3.97 3.66 4.38 4.41 -
5,3,3,4,6,4,2 Ac - 2.06
5,3,3,4,6,4 bDFucpN4N 4.57 3.83 4.16 3.98 4.09 1.32
5,3,3,4,6,2 Ac - 2.06
5,3,3,4,6 bDGlcpN 4.48 3.75 3.68 3.65 3.49 3.63-3.82
5,3,3,4 aDGlcpN 5.12 3.26 3.86 3.47 4.33 3.79-4.08
5,3,3 aDGalpA 5.33 3.83 4.25 4.36 4.53 -
5,3,7,7,4 %aDGlcpN 5.24 3.22 3.91 3.50 4.11 3.81
5,3,7,7 aDGalpA 5.02 3.95 4.07 4.52 4.31 -
5,3,7 aXLDmanHepp 4.88 4.00 3.84 3.89 3.60 4.21 3.58-3.82
5,3 aXLDmanHepp 5.38 4.22 4.10 4.04 3.60 4.14 3.56-3.94
5,4 bDGalp 4.51 3.50 3.62 3.95 3.66 3.69-3.74
5 aXLDmanHepp 5.11 4.04 4.13 4.23 4.17 4.17 3.72
?XKdop - - 1.86-2.22 4.12 4.13 3.70 3.86 3.60-3.84
1H/13C HSQC data:
Linkage Residue C1/H1 C2/H2 C3/H3 C4/H4 C5/H5 C6/H6 C7/H7 C8/H8
5,3,2 %bDGlcp 103.5/4.59 74.0/3.22 75.4/3.51 69.9/3.45 76.2/3.59 61.3/3.78-3.90
5,3,3,4,6,4,3,2 Ac 23.0/2.00
5,3,3,4,6,4,3 aLAltpNA 101.7/4.88 52.2/3.97 68.8/3.66 69.9/4.38 78.7/4.41
5,3,3,4,6,4,2 Ac 23.0/2.06
5,3,3,4,6,4 bDFucpN4N 101.9/4.57 51.6/3.83 76.5/4.16 55.4/3.98 68.1/4.09 16.3/1.32
5,3,3,4,6,2 Ac 23.0/2.06
5,3,3,4,6 bDGlcpN 102.2/4.48 55.9/3.75 73.0/3.68 79.1/3.65 75.3/3.49 60.8/3.63-3.82
5,3,3,4 aDGlcpN 97.0/5.12 54.9/3.26 70.3/3.86 70.0/3.47 71.6/4.33 68.6/3.79-4.08
5,3,3 aDGalpA 102.1/5.33 69.2/3.83 69.0/4.25 80.1/4.36 72.3/4.53
5,3,7,7,4 %aDGlcpN 95.1/5.24 55.0/3.22 70.3/3.91 70.0/3.50 73.0/4.11 60.7/3.81
5,3,7,7 aDGalpA 99.7/5.02 68.8/3.95 69.7/4.07 77.3/4.52 70.6/4.31
5,3,7 aXLDmanHepp 103.2/4.88 70.9/4.00 71.2/3.84 66.7/3.89 73.2/3.60 68.4/4.21 72.0/3.58-3.82
5,3 aXLDmanHepp 99.7/5.38 78.9/4.22 79.3/4.10 66.4/4.04 73.2/3.60 69.1/4.14 73.6/3.56-3.94
5,4 bDGalp 104.2/4.51 72.2/3.50 73.1/3.62 71.0/3.95 75.8/3.66 62.6/3.69-3.74
5 aXLDmanHepp 101.3/5.11 71.1/4.04 75.3/4.13 75.1/4.23 72.0/4.17 69.2/4.17 63.8/3.72
?XKdop 34.4/1.86-2.22 66.4/4.12 75.3/4.13 70.0/3.70 72.1/3.86 64.1/3.60-3.84