Structural Analysis of the Core Oligosaccharide and the O-Specific Polysaccharide from thePlesiomonas shigelloidesO33:H3 (Strain CNCTC 34/89) Lipopolysaccharide

2013 ◽  
Vol 2014 (6) ◽  
pp. 1241-1252 ◽  
Author(s):  
Gustav Nestor ◽  
Jolanta Lukasiewicz ◽  
Corine Sandström
Keyword(s):  
Structural Analysis ◽  
Core Oligosaccharide ◽  
The Core ◽  
Specific Polysaccharide

Structural analysis of the core oligosaccharide from Pasteurella multocida strain X73

2005 ◽  
Vol 340 (6) ◽  
pp. 1253-1257 ◽  
Author(s):  
Frank St. Michael ◽  
Jianjun Li ◽  
Andrew D. Cox
Keyword(s):  
Structural Analysis ◽  
Pasteurella Multocida ◽  
Core Oligosaccharide ◽  
The Core

scholarly journals Bordetella holmesii Lipopolysaccharide Hide and Seek Game with Pertussis: Structural Analysis of the O-Specific Polysaccharide and the Core Oligosaccharide of the Type Strain ATCC 51541

2020 ◽  
Vol 21 (17) ◽  
pp. 6433
Author(s):  
Karolina Ucieklak ◽  
Sabina Koj ◽  
Tomasz Niedziela
Keyword(s):  
Whooping Cough ◽  
13C Nmr Spectroscopy ◽  
Structural Features ◽  
The Novel ◽  
Core Oligosaccharide ◽  
The Core ◽  
Sds Page ◽  
Specific Polysaccharide ◽  
First Time ◽  
Hydrolysis Of

Whooping cough is a highly contagious disease caused predominantly by Bordetella pertussis, but it also comprises of a pertussis-like illness caused by B. holmesii. The virulence factors of B. holmesii and their role in the pathogenesis remain unknown. Lipopolysaccharide is the main surface antigen of all Bordetellae. Data on the structural features of the lipopolysaccharide (LPS) of B. holmesii are scarce. The poly- and oligosaccharide components released by mild acidic hydrolysis of the LPS were separated and investigated by 1H and 13C NMR spectroscopy, mass spectrometry, and chemical methods. The structures of the O-specific polysaccharide and the core oligosaccharide of B. holmesii ATCC 51541 have been identified for the first time. The novel pentasaccharide repeating unit of the B. holmesii O-specific polysaccharide has the following structure: {→2)-α-l-Rhap-(1→6)-α-d-Glcp-(1→4)-[β-d-GlcpNAc-(1→3]-α-d-Galp-(1→3)-α-d-GlcpNAc-(1→}n. The SDS-PAGE and serological cross-reactivities of the B. holmesii LPS suggested the similarity between the core oligosaccharides of B. holmesii ATCC 51541 and B. pertussis strain 606. The main oligosaccharide fraction contained a nonasaccharide. The comparative analysis of the NMR spectra of B. holmesii core oligosaccharide fraction with this of the B. pertussis strain 606 indicated that the investigated core oligosaccharides were identical.

Structural analysis of the O-specific polysaccharide isolated from Plesiomonas shigelloides O51 lipopolysaccharide

2009 ◽  
Vol 344 (7) ◽  
pp. 894-900 ◽  
Author(s):  
Anna Maciejewska ◽  
Jolanta Lukasiewicz ◽  
Tomasz Niedziela ◽  
Zbigniew Szewczuk ◽  
Czeslaw Lugowski
Keyword(s):  
Structural Analysis ◽  
Plesiomonas Shigelloides ◽  
Specific Polysaccharide

scholarly journals A Fast and Exact Greedy Algorithm for the Core–Periphery Problem

Symmetry ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 94 ◽  
Author(s):  
Dario Fasino ◽  
Franca Rinaldi
Keyword(s):  
Structural Analysis ◽  
Optimization Problem ◽  
Polynomial Time Algorithm ◽  
Time Algorithm ◽  
Combinatorial Optimization Problem ◽  
Connected Subgraph ◽  
Optimal Solutions ◽  
The Core ◽  
Core Set ◽  
Key Concepts

The core–periphery structure is one of the key concepts in the structural analysis of complex networks. It consists of a partitioning of the node set of a given graph or network into two groups, called core and periphery, where the core nodes induce a well-connected subgraph and share connections with peripheral nodes, while the peripheral nodes are loosely connected to the core nodes and other peripheral nodes. We propose a polynomial-time algorithm to detect core–periphery structures in networks having a symmetric adjacency matrix. The core set is defined as the solution of a combinatorial optimization problem, which has a pleasant symmetry with respect to graph complementation. We provide a complete description of the optimal solutions to that problem and an exact and efficient algorithm to compute them. The proposed approach is extended to networks with loops and oriented edges. Numerical simulations are carried out on both synthetic and real-world networks to demonstrate the effectiveness and practicability of the proposed algorithm.

scholarly journals The Activity of Lipid A and Core Components of Bacterial Lipopolysaccharides in the Prevention of the Hypersensitive Response in Pepper

1997 ◽  
Vol 10 (7) ◽  
pp. 926-928 ◽  
Author(s):  
Mari-Anne Newman ◽  
Michael J. Daniels ◽  
J. Maxwell Dow
Keyword(s):  
Hypersensitive Response ◽  
Xanthomonas Campestris ◽  
Lipid A ◽  
Enteric Bacteria ◽  
Core Oligosaccharide ◽  
The Core ◽  
Minimal Structure ◽  
Core Components ◽  
Pre Treatment ◽  
Bacterial Lipopolysaccharides

Pre-treatment of leaves of pepper (Capsicum annuum) with lipopolysaccharide (LPS) preparations from enteric bacteria and Xanthomonas campestris could prevent the hypersensitive response caused by an avirulent X. campestris strain. By use of a range of deep-rough mutants, the minimal structure in Salmonella LPS responsible for the elicitation of this effect was determined to be lipid A attached to a disaccharide of 2-keto-3-deoxyoctulosonate; lipid A alone and the free core oligosaccharide from a Salmonella Ra mutant were not effective. For Xanthomonas, the core oligosaccharide alone had activity although lipid A was not effective. The results suggest that pepper cells can recognize different structures within bacterial LPS to trigger alterations in plant response to avirulent pathogens.

scholarly journals Structure of the core oligosaccharide of a rough-type lipopolysaccharide of Pseudomonas syringae pv. phaseolicola

2004 ◽  
Vol 271 (23-24) ◽  
pp. 4968-4977 ◽  
Author(s):  
Evelina L. Zdorovenko ◽  
Evgeny Vinogradov ◽  
Galina M. Zdorovenko ◽  
Buko Lindner ◽  
Olga V. Bystrova ◽  
...  
Keyword(s):  
Pseudomonas Syringae ◽  
Core Oligosaccharide ◽  
The Core
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