Yersinia pseudotuberculosis cytotoxic necrotizing factor interacts with glycosaminoglycans.
FASEB J
; 35(7): e21647, 2021 07.
Article
em En
| MEDLINE
| ID: mdl-34165206
ABSTRACT
The Cytotoxic Necrotizing Factor Y (CNFY) is produced by the gram-negative, enteric pathogen Yersinia pseudotuberculosis. The bacterial toxin belongs to a family of deamidases, which constitutively activate Rho GTPases, thereby balancing inflammatory processes. We identified heparan sulfate proteoglycans as essential host cell factors for intoxication with CNFY. Using flow cytometry, microscopy, knockout cell lines, pulsed electron-electron double resonance, and bio-layer interferometry, we studied the role of glucosaminoglycans in the intoxication process of CNFY. Especially the C-terminal part of CNFY, which encompasses the catalytic activity, binds with high affinity to heparan sulfates. CNFY binding with the N-terminal domain to a hypothetical protein receptor may support the interaction between the C-terminal domain and heparan sulfates, which seems sterically hindered in the full toxin. A second conformational change occurs by acidification of the endosome, probably allowing insertion of the hydrophobic regions of the toxin into the endosomal membrane. Our findings suggest that heparan sulfates play a major role for intoxication within the endosome, rather than being relevant for an interaction at the cell surface.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Toxinas Bacterianas
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Yersinia pseudotuberculosis
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Proteínas Recombinantes
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Heparina
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Linfócitos
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Proteínas de Escherichia coli
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Glicosaminoglicanos
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article