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1. (CSDB ID: 491) | report error |
| S-3HOBut-(1-5)-+ | -6)-a-D-GlcpNAc-(1-3)-a-L-FucpNAc-(1-3)-a-D-GlcpNAc-(1-4)-b-Legp7Ac-(2- |
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← revised structure Show legend Show as text |
Acinetobacter baumannii O24
(Ancestor NCBI TaxID 470,
species name lookup)
]
chem.hull.ac.ukA polysaccharide containing D-GlcN, 2-amino-2,6-dideoxy-L-galactose (L-FucN), and 7-acetamido-5-acylamino-3,5,7,9-tetradeoxy-L-glycero-D-galacto-nonulo sonic acid (LegAX), in which the acyl group (X) is either S-3-hydroxybutyryl (50%) or acetyl (50%), was isolated by mild acid hydrolysis treatment, followed by gel-permeation chromatography, of the water-soluble lipopolysaccharide from Acinetobacter baumannii serogroup O24. The polysaccharide, characterised by means of monosaccharide analyses, partial acid hydrolysis, methylation analysis and NMR studies, was shown to have a linear tetrasaccharide repeating unit, as depicted below. Serological tests indicated that the polymer corresponded to the O24 antigen. [→6)-α-D-GlcpNAc-(1→3)-α-L-FucpNAc-(1→3)-α-D-Glcp NAc-(1→4)-β-LegpAX-(1→].
Lipopolysaccharide, O antigen, Acinetobacter baumannii, structural studies
Structure type: polymer chemical repeating unit|
← originally published structure Show legend |
13C NMR data: Linkage Residue C1 C2 C3 C4 C5 C6 C7 C8 C9 4,3,3,2 Ac 4,3,3 aDGlcpN 99.36 54.27 71.93 71.60 70.78 62.36 4,3,2 Ac 4,3 aLFucpN 98.11 49.22 74.54 71.93 67.46 16.11 4,2 Ac 4 aDGlcpN 94.25 54.11 76.46 69.02 73.24 61.51 5 lS3HOBut 7 Ac bXLegp 173.60 100.20 37.54 72.67 51.12 70.62 54.00 ? 20.34 1H NMR data: Linkage Residue H1 H2 H3 H4 H5 H6 H7 H8 H9 4,3,3,2 Ac 4,3,3 aDGlcpN 5.01 ? ? ? ? ? 4,3,2 Ac 4,3 aLFucpN 4.94 ? ? ? ? ? 4,2 Ac 4 aDGlcpN 4.86 ? ? ? ? ? 5 lS3HOBut 7 Ac bXLegp - - 1.60-2.45 4.03 3.80 4.24 3.98 3.98 1.21 1H/13C HSQC data: Linkage Residue C1/H1 C2/H2 C3/H3 C4/H4 C5/H5 C6/H6 C7/H7 C8/H8 C9/H9 4,3,3,2 Ac 4,3,3 aDGlcpN 99.36/5.01 54.27/? 71.93/? 71.60/? 70.78/? 62.36/? 4,3,2 Ac 4,3 aLFucpN 98.11/4.94 49.22/? 74.54/? 71.93/? 67.46/? 16.11/? 4,2 Ac 4 aDGlcpN 94.25/4.86 54.11/? 76.46/? 69.02/? 73.24/? 61.51/? 5 lS3HOBut 7 Ac bXLegp 37.54/1.60-2.45 72.67/4.03 51.12/3.80 70.62/4.24 54.00/3.98 ?/3.98 20.34/1.21
1H NMR data:
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13C NMR data:
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The spectrum also has 1 signal at unknown position (not plotted). |
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