Taxonomic group: fungi / Basidiomycota
(Phylum: Basidiomycota)
Organ / tissue: capsuleAssociated disease: infection due to Cryptococcus neoformans [ICD11:
XN3EH 
];
infection due to Cryptococcus gattii [ICD11:
XN0LE ]
Publication DOI: 10.1039/d0sc01249aJournal NLM ID: 101545951Publisher: Cambridge, UK: Royal Society of Chemistry
Correspondence: Oscarson S <stefan.oscarson
ucd.ie>; Casadevall A <acasade1
jhu.edu>
Institutions: Centre for Synthesis and Chemical Biology, UCD School of Chemistry, University College Dublin, Belfield, Ireland, Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, USA
A convergent synthetic strategy to Cryptococcus neoformans glucuronoxylomannan (GXM) capsular polysaccharide part structures was developed based on di-, tri-, tetra-, penta- and hexasaccharide thioglycoside building blocks. The approach permitted the synthesis of a library of spacer-containing serotype A and D related GXM oligosaccharide structures, ranging from di- to octadecasaccharides. Ten deprotected GXM compounds (mono- to decasaccharide) were printed onto microarray plates and screened with seventeen mouse monoclonal antibodies (mAbs) to GXM. For the first time a GXM oligosaccharide structure (a serotype A decasaccharide), capable of being recognized by neutralizing forms of these GXM-specific mAbs, has been identified, offering insight into the binding epitopes of a range of protective monoclonal antibodies and furthering our efforts to develop semi-synthetic conjugate vaccine candidates against C. neoformans.
synthesis, epitopes, Cryptococcus neoformans, Glucuronoxylomannan, mAbs
Structure type: suggested polymer biological repeating unit
Location inside paper: Fig. 1, GXM, left structures, serotype B
Trivial name: glucuronoxylomannan (GXM), glucuronoxylomannan
Compound class: CPS, EPS, O-polysaccharide, O-antigen, cell wall polysaccharide, polysaccharide, glucuronoxylomannan, capsule polysaccharide
Contained glycoepitopes: IEDB_114701,IEDB_115136,IEDB_115576,IEDB_130701,IEDB_140116,IEDB_140630,IEDB_144983,IEDB_145668,IEDB_152206,IEDB_164174,IEDB_167188,IEDB_174332,IEDB_2270799,IEDB_423153,IEDB_76933,IEDB_983930,SB_197,SB_44,SB_67,SB_72
Methods: chemical synthesis, binding assays
Related record ID(s): 50848, 50849, 50851
NCBI Taxonomy refs (TaxIDs): 37769Reference(s) to other database(s): GTC:G42955PN
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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(later renamed to: Cryptococcus gattii VGI B)