关键词: 2-acetamido-4-amino-2,4,6-trideoxyhexose C reactive protein C-reactive protein CRP ChoP Haemophilus influenzae LTA PAF Phosphocholine PnC Streptococcus pneumoniae TAA ZPS choline phosphate lipotechoic acid platelet-activating factor pneumococcal C substance zwitterionic polysaccharide

Mesh : C-Reactive Protein / immunology metabolism Host-Pathogen Interactions / immunology Humans Molecular Structure Phosphorylcholine / chemistry immunology metabolism Pneumococcal Infections / immunology metabolism microbiology Polysaccharides / chemistry immunology metabolism Protein Binding / immunology Streptococcus pneumoniae / immunology metabolism physiology

来  源:   DOI:10.1016/j.molimm.2013.05.237   PDF(Sci-hub)

Abstract:
Among the non-carbohydrate components of glycans, the addition of phosphocholine (ChoP) to the glycans of pathogens occurs more rarely than acetylation or methylation, but it has far more potent biological consequences. These arise from ChoP\'s multiple interactions with host proteins, which are important at all stages of the infection process. These stages include initial adherence to cells, encountering the host\'s innate immune system and then the adaptive immune system. Thus, in the initial stages of an infection, ChoP groups are an asset to the pathogen, but they can turn into a disadvantage subsequently. In this review, we have focussed on structural aspects of these phenomena. We describe the biosynthesis of the ChoP modification, the structures of the pathogen glycans known to carry ChoP groups and the host proteins that recognize ChoP.
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