Plesiomonas shigelloides is a Gram-negative opportunistic pathogen associated with gastrointestinal and extraintestinal infections, which especially invades immunocompromised patients and neonates. The lipopolysaccharides are one of the major virulence determinants in Gram-negative bacteria and are structurally composed of three different domains: the lipid A, the core oligosaccharide and the O-antigen polysaccharide. In the last few years we elucidated the structures of the O-chain and the core oligosaccharide from the P. shigelloides strain 302-73. In this paper we now report the characterization of the linkage between the core and the O-chain. The LPS obtained after PCP extraction contained a small number of O-chain repeating units. The product obtained by hydrazinolysis was analysed by FTICR-ESIMS and suggested the presence of an additional Kdo in the core oligosaccharide. Furthermore, the LPS was hydrolysed under mild acid conditions and a fraction that contained one O-chain repeating unit linked to a Kdo residue was isolated and characterized by FTICR-ESIMS and NMR spectroscopy. Moreover, after an alkaline reductive hydrolysis, a disaccharide α-Kdo-(2→6)-GlcNol was isolated and characterized. The data obtained proved the presence of an α-Kdo in the outer core and allowed the identification of the O-antigen biological repeating unit as well as its linkage with the core oligosaccharide.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.carres.2010.09.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
2'-Fucosyllactose inhibits human norovirus replication in human intestinal enteroids.
J Virol
January 2025
Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA.
Unlabelled: Human noroviruses (HuNoVs) are the leading cause of acute gastroenteritis worldwide. Currently, there are no targeted antivirals for the treatment of HuNoV infection. Histo-blood group antigens (HBGAs) on the intestinal epithelium are cellular attachment factors for HuNoVs; molecules that block the binding of HuNoVs to HBGAs thus have the potential to be developed as antivirals.
View Article and Find Full Text PDFUnlocking the potential of β-limit dextrin: Preparation, structure, properties, and promising applications.
Carbohydr Polym
March 2025
State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Institute of Future Food Technology, JITRI, Yixing 214200, China. Electronic address:
Starch is a widely used and economically important polymer; however, its industrial applications are limited by certain shortcomings, such as retrogradation and high digestion rate. To overcome these limitations, native starches can be hydrolyzed by β-amylase, resulting in the production of β-limit dextrin (β-LD) and maltose as a co-product. β-LD retains the original inner core structure of its parent amylopectin and contains truncated external chains that is not prone to form exterior chain helical.
View Article and Find Full Text PDFIsolation and characterisation of a heparosan capsular polysaccharide and a core oligosaccharide from Moraxella lincolnii strain CCUG 52988.
Carbohydr Res
December 2024
School of Pharmacy and Medical Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia; Institute for Biomedicine and Glycomics, Griffith University, Gold Coast Campus, Queensland, 4222, Australia. Electronic address:
Moraxella lincolnii is a Gram-negative bacterium that resides in the upper respiratory tract (URT) of humans and may have a role as a member of a protective microbial community. Structural characterisation studies of its outer membrane glycan structures are very limited. We report here the isolation and structural characterisation (NMR, GLC-MS) of a capsular polysaccharide (CPS) and an oligosaccharide (OS) (lipooligosaccharide (LOS)-derived) isolated from strain CCUG 52988.
View Article and Find Full Text PDFA core glycolipid vaccine elicits cross-reactive antibodies against Salmonella spp. and protects against invasive nontyphoidal Salmonella disease in mice.
J Infect Dis
December 2024
Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
Background: Enteric fever caused by Salmonella enterica serovars Typhi and Paratyphi A in addition to gastroenteritis and invasive disease, predominantly attributable to nontyphoidal Salmonella serovars Typhimurium and Enteritidis, are major causes of death and disability across the globe. A broad-spectrum vaccine that protects against disease caused by typhoidal and nontyphoidal serovars of Salmonella is not available for humans but would prevent a considerable burden of disease worldwide.
Methods: We previously developed a broad-spectrum vaccine for Gram-negative bacteria that is based on the inner core domain of detoxified Escherichia coli O111, Rc (J5) mutant lipooligosaccharide, a highly conserved antigen across Gram-negative bacteria, complexed with an outer membrane protein of group B Neisseria meningitidis.
Genome-wide association study of sucrose content in vegetable soybean.
BMC Plant Biol
December 2024
Key Laboratory of Biology and Genetics Improvement of Soybean, Zhongshan Biological Breeding Laboratory (ZSBBL), State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Agriculture, Ministry of Agriculture, National Innovation Platform for Soybean Breeding and Industry-Education Integration, Nanjing Agricultural University, Nanjing, 210095, China.
Background: Vegetable soybean is an important legume vegetable. High sucrose content is a significant quality characteristic of vegetable soybean that influences consumers' taste. However, the genetic basis of sucrose content in vegetable soybean is currently unclear.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!