1H and 13C NMR assignments of a lipopolysaccharide obtained from the deep rough mutant of Escherichia coli D31m4
✍ Scribed by Pawan K. Agrawal; C. Allen Bush; Nilofer Qureshi; Kuni Takayama
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 305 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
The hexamethyl derivative of lipopolysaccharide (LPS), obtained by diazomethane methylation of LPS extracted from a deep mutant of Escherichia coli D31m4, followed by high-performance liquid chromatographic puriÐcation, was subjected to homo-and heteronuclear two-dimensional NMR spectroscopy (DQF-COSY, HOHAHA, NOESY, HMQC and HMBC) to achieve 1H and 13C NMR assignments, particularly of the sugar backbone. These studies conÐrmed two each of glucosamine (GlcN), 3-deoxy-D-manno-octulosonic acid (Kdo), phosphate, b-hydroxymyristate and b-acyloxymyristate and the structure of the tetrasaccharide as a-Kdo P -(2 ] 4)bisphosphorylated at the 1 and 4@ positions.
1998 John Wiley & a-Kdo P -(2 ] 6)-b-D-Glc P N-(1 ] 6)a-D-Glc P N, ( Sons Ltd.