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Yersinia enterocoli...
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Kirjavainen, Vesa
(författare)
Yersinia enterocolitica serum resistance proteins YadA and Ail bind the complement regulator C4b-binding protein
- Artikel/kapitelEngelska2008
Förlag, utgivningsår, omfång ...
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2008-08-29
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Public Library of Science (PLoS),2008
Nummerbeteckningar
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LIBRIS-ID:oai:lup.lub.lu.se:e5922cf6-489d-42a5-997c-4fc9a5a21798
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https://lup.lub.lu.se/record/1285114URI
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https://doi.org/10.1371/journal.ppat.1000140DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Ämneskategori:ref swepub-contenttype
Anmärkningar
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Many pathogens are equipped with factors providing resistance against the bactericidal action of complement. Yersinia enterocolitica, a Gram-negative enteric pathogen with invasive properties, efficiently resists the deleterious action of human complement. The major Y. enterocolitica serum resistance determinants include outer membrane proteins YadA and Ail. Lipopolysaccharide (LPS) O-antigen (O-ag) and outer core (OC) do not contribute directly to complement resistance. The aim of this study was to analyze a possible mechanism whereby Y. enterocolitica could inhibit the antibody-mediated classical pathway of complement activation. We show that Y. enterocolitica serotypes O:3, O:8, and O:9 bind C4b-binding protein (C4bp), an inhibitor of both the classical and lectin pathways of complement. To identify the C4bp receptors on Y. enterocolitica serotype O:3 surface, a set of mutants expressing YadA, Ail, O-ag, and OC in different combinations was tested for the ability to bind C4bp. The studies showed that both YadA and Ail acted as C4bp receptors. Ail-mediated C4bp binding, however, was blocked by the O-ag and OC, and could be observed only with mutants lacking these LPS structures. C4bp bound to Y. enterocolitica was functionally active and participated in the factor I-mediated degradation of C4b. These findings show that Y. enterocolitica uses two proteins, YadA and Ail, to bind C4bp. Binding of C4bp could help Y. enterocolitica to evade complement-mediated clearance in the human host.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Jarva, Hanna
(författare)
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Biedzka-Sarek, Marta
(författare)
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Blom, AnnaLund University,Lunds universitet,Proteinkemi, Malmö,Forskargrupper vid Lunds universitet,Protein Chemistry, Malmö,Lund University Research Groups(Swepub:lu)klke-abl
(författare)
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Skurnik, Mikael
(författare)
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Meri, Seppo
(författare)
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Proteinkemi, MalmöForskargrupper vid Lunds universitet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:PLoS Pathogens: Public Library of Science (PLoS)4:81553-73661553-7374
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