Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Acinetobacter baumannii [ICD11:
XN8LS 
]
NCBI PubMed ID: 23679002Publication DOI: 10.1111/mmi.12265Journal NLM ID: 8712028Publisher: Blackwell Publishing
Correspondence: mfeldman
ualberta.ca
Institutions: Alberta Glycomics Centre, Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
Protein glycosylation was once considered as an eccentricity of a few bacteria. However in the recent years multiple O-glycosylation mechanisms have been identified in bacterial species from the most diverse genera, including various important human pathogens. This review focuses on summarizing the structural diversity, the various pathways and the physiological roles of this post-translational protein modification. We propose a classification of O-glycosylation based on the requirement of an oligosaccharyltransferase (OTase). OTase-dependent glycosylation utilizes an oligosaccharide synthesized on a lipid carrier that is transferred to proteins en bloc by an OTase. Multiple proteins, including the pilins, are glycosylated using this mechanism. OTase-independent glycosylation refers to the pathway in which glycosyltransferases sequentially add monosaccharides onto the target proteins. This pathway is employed for glycosylation of flagella and autotransporters. Both systems play key roles in pathogenesis. Exploiting glycosylation machineries it is now possible to generate glycoconjugates made of different proteins attached to polysaccharides derived from LPS or capsule biosynthesis. These recombinant glycoproteins can be exploited for vaccines and diagnostics of bacterial infections. Furthermore, O-glycosylation systems are promising targets for antibiotic development. Technological advances in MS and NMR will facilitate the discovery of novel glycosylation systems. Likely, the O-glycosylation pathways we currently know constitute just the tip of the iceberg of a still largely uncharacterized bacterial glycosylation world.
biosynthesis, glycoconjugates, bacteria, glycosyltransferases, capsule, glycoproteins, flagella, Glycomics, O-glycosylation
Structure type: oligomer
Location inside paper: p.18, table 1
Aglycon: peptide
Compound class: O-glycan
Contained glycoepitopes: IEDB_130648,IEDB_135813,IEDB_136906,IEDB_137340,IEDB_137472,IEDB_137473,IEDB_140529,IEDB_141794,IEDB_141807,IEDB_142488,IEDB_146664,IEDB_151528,IEDB_151531,IEDB_167069,IEDB_190606,IEDB_983931,SB_192,SB_7
Enzymes that release or process the structure: PglL
Comments, role: microreview
Related record ID(s): 29206, 29568, 29569, 29571, 29573, 29574, 29575, 29577, 29578
NCBI Taxonomy refs (TaxIDs): 400667Reference(s) to other database(s): GTC:G82631BC
Show glycosyltransferases
There is only one chemically distinct structure:
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