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1. (Article ID: 7047)
 
Calixto R, Mattos B, Bittencourt V, Lopes L, Souza L, Sassaki G, Cipriani T, Silva M, Barreto-Bergter E
β-Galactofuranose-containing structures present in the cell wall of the saprophytic fungus Cladosporium (Hormoconis) resinae
Research in Microbiology 161(8) (2010) 720-728
 

A peptidogalactomannan was isolated from mycelia of Cladosporium (Hormoconis) resinae and characterized using methylation-fragmentation analysis, partial acid hydrolysis and ¹H and ¹³C-NMR spectroscopy. The galactomannan component was a branched structure and consisted of a main chain containing (1→6)-linked α-d-Manp residues substituted at O-2 by side chains containing (1→2)-linked α-D-Manp residues. β-D-Galf residues were present as side chains of 3-4 units that are (1→5)-interlinked. This structure is very similar to a pGM isolated from Aspergillus fumigatus and differs from that of Cladosporium werneckii (currently named Hortaea werneckii), with this pGM and other fungal galactomannans having single terminal (1→6)-linked β-Galf residues. The importance of the carbohydrate moiety of Cladosporium resinae pGM in immunoassays was also demonstrated. On FACS examination, a decrease (60%) in rabbit serum anti- C. resinae binding to C. resinae conidia occurred when this serum had been previously incubated with pGMs from C. resinae and A. fumigatus or with mannoprotein from Candida parapsilosis, suggesting the presence of cross-reactive determinants in these fungi.

NMR spectroscopy, carbohydrate epitopes, Cladosporium resinae, Hormoconis resinae, Peptidogalactomannan

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