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1. (Article ID: 4952)
 
De Felice A, Di Lorenzo F, Scherlach K, Ross C, Silipo A, Hertweck C, Molinaro A
Structural investigation of the lipopolysaccharide O-chain isolated from Burkholderia fungorum strain DSM 17061
Carbohydrate Research 433 (2016) 31-35
 

Gram-negative bacteria exhibit lipopolysaccharides (LPSs) on their outer membrane surface. LPS is considered one of the most potent bacterial virulence factors. Here we report the elucidation of the LPS O-chain structure isolated from Burkholderia fungorum, a bacterium isolated from the white-rot fungus Phanerochaete chrysosporium that can act as a pathogen for plants and domesticated animals. The structure was determined by the employment of detailed chemical and NMR spectroscopy analyses as the following.

NMR spectroscopy, O-chain, outer membrane, lipopolysaccharide (LPS), Structural characterization, Burkholderia fungorum

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2. (Article ID: 5143)
 
Cloutier M, Muru K, Ravicoularamin G, Gauthier C
Polysaccharides from Burkholderia species as targets for vaccine development, immunomodulation and chemical synthesis
Natural Product Reports 35(12) (2018) 1251-1293
 

Burkholderia species are a vast group of human pathogenic, phytopathogenic, and plant- or environment-associated bacteria. B. pseudomallei, B. mallei, and B. cepacia complex are the causative agents of melioidosis, glanders, and cystic fibrosis-related infections, respectively, which are fatal diseases in humans and animals. Due to their high resistance to antibiotics, high mortality rates, and increased infectivity via the respiratory tract, B. pseudomallei and B. mallei have been listed as potential bioterrorism agents by the Centers for Disease Control and Prevention. Burkholderia species are able to produce a large network of surface-exposed polysaccharides, i.e., lipopolysaccharides, capsular polysaccharides, and exopolysaccharides, which are virulence factors, immunomodulators, major biofilm components, and protective antigens, and have crucial implications in the pathogenicity of Burkholderia-associated diseases. This review provides a comprehensive and up-to-date account regarding the structural elucidation and biological activities of surface polysaccharides produced by Burkholderia species. The chemical synthesis of oligosaccharides mimicking Burkholderia polysaccharides is described in detail. Emphasis is placed on the recent research efforts toward the development of glycoconjugate vaccines against melioidosis and glanders based on synthetic or native Burkholderia oligo/polysaccharides.

lipopolysaccharides, Burkholderia, capsular polysaccharides, Oligosaccharides, glycoconjugate vaccines, antigens, exopolysaccharides, surface polysaccharide, virulence factor, Biofilm, chemical synthesis, bioterrorism

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