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Neisseria PilC protein identified as type-4 pilus tip-located adhesin

Nature volume 373, pages 357–359 (1995)Cite this article

Abstract

TYPE-4 pilus-mediated adherence of Neisseria gonorrhoeae and Neisseria meningitidis is considered to be a crucial early event in neisserial infections1,2. In addition to the principal pilus subunit (pilin or PilE), both pathogens produce low quantities of a phase-variable PilC protein which is implicated in pilus biogenesis and pilus-mediated epithelial cell adherence3,4. The identity, however, of the pilus adhesin has remained obscure4,5. Here we describe the isolation of a PilC protein from a gonococcal overproducing strain and demonstrate its specific interaction with human epithelial cells. Our results are consistent with the cell and species tropisms of neisserial infections. Binding of PilC effectively competes with pilus-mediated, but not Opa-mediated6, attachment of N. gonorrhoeae and of N. meningitidis, indicating that both pathogens interact with identical or very similar epithelial cell receptors. Immunogold electron microscopy using antisera raised against purified PilC and synthetic peptides locates PilC at the tip of gonococcal pili. PilC thus represents an essential pilus-associated adhesin, providing a rationale for selective protection against neisserial infections.

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Authors and Affiliations

  1. Max-Planck-lnstitut für Biologie, Abteilung Infektionsbiologie, Spemannstrasse 34, 72076, Tübingen, Germany

    Thomas Rudel, Ina Scheuerpflug & Thomas F. Meyer

  2. Max-Planck-lnstitut für Infektionsbiologie, Monbijou-Haus, 10117, Berlin, Germany

    Thomas F. Meyer

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  1. Thomas Rudel
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  2. Ina Scheuerpflug
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  3. Thomas F. Meyer
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Rudel, T., Scheuerpflug, I. & Meyer, T. Neisseria PilC protein identified as type-4 pilus tip-located adhesin. Nature 373, 357–359 (1995). https://doi.org/10.1038/373357a0

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