Article (Scientific journals)
Interaction of Bordetella adenylate cyclase toxin with complement receptor 3 involves multivalent glycan binding.
Hasan, Shakir; Osickova, Adriana; Bumba, Ladislav et al.
2015In FEBS Letters, 589 (3), p. 374-9
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Keywords :
Adenylate Cyclase Toxin/genetics/metabolism; Amino Acid Substitution; Asparagine/genetics; Bordetella pertussis/metabolism/pathogenicity; CD11b Antigen/chemistry/metabolism; CD18 Antigens/chemistry/metabolism; Glutamine/genetics; Glycosylation; Humans; Macrophage-1 Antigen/genetics/metabolism; Polysaccharides/metabolism; Protein Structure, Tertiary; Adenylate cyclase toxin; CD11b/CD18; Complement receptor type 3; N-linked glycosylation; Point mutants; Repeats in toxin
Abstract :
[en] The interaction of Bordetella pertussis adenylate cyclase toxin (CyaA) with complement receptor 3 (CR3, CD11b/CD18) involves N-linked oligosaccharide chains. To investigate the relative importance of the individual N-glycans of CR3 for toxin activity, the asparagine residues of the consensus N-glycosylation sites of CR3 were substituted with glutamine residues that cannot be glycosylated. Examination of CR3 mutant variants and mass spectrometry analysis of the N-glycosylation pattern of CR3 revealed that N-glycans located in the C-terminal part of the CD11b subunit are involved in binding and cytotoxic activity of CyaA. We suggest that these N-glycans form a defined clustered saccharide patch that enables multivalent contact of CR3 with CyaA, enhancing both affinity and specificity of the integrin-toxin interaction.
Disciplines :
Microbiology
Author, co-author :
Hasan, Shakir ;  Université de Liège - ULiège > I3-Immunophysiology
Osickova, Adriana
Bumba, Ladislav
Novak, Petr
Sebo, Peter
Osicka, Radim
Language :
English
Title :
Interaction of Bordetella adenylate cyclase toxin with complement receptor 3 involves multivalent glycan binding.
Publication date :
2015
Journal title :
FEBS Letters
ISSN :
0014-5793
eISSN :
1873-3468
Publisher :
Wiley-Blackwell, United States
Volume :
589
Issue :
3
Pages :
374-9
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
Available on ORBi :
since 28 May 2019

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