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

TYPE-4 pilus-mediated adherence of Neisseria gonorrhoeae and Neisseria meningitidis is considered to be a crucial early event in neisserial infections 1,2 . In addition to the principal pilus subunit (pilin or PilE), both pathogens produce low quantities of a phase-variable PilC protein which is imp...

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Published in:Nature (London) 1995-01, Vol.373 (6512), p.357-359
Main Authors: Rudel, Thomas, Scheuerpflug, Ina, Meyer, Thomas F.
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creator Rudel, Thomas
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Meyer, Thomas F.
description TYPE-4 pilus-mediated adherence of Neisseria gonorrhoeae and Neisseria meningitidis is considered to be a crucial early event in neisserial infections 1,2 . 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 adherence 3,4 . The identity, however, of the pilus adhesin has remained obscure 4,5 . 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-mediated 6 , 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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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 adherence 3,4 . The identity, however, of the pilus adhesin has remained obscure 4,5 . 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-mediated 6 , 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.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>7830772</pmid><doi>10.1038/373357a0</doi><tpages>3</tpages></addata></record>
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identifier ISSN: 0028-0836
ispartof Nature (London), 1995-01, Vol.373 (6512), p.357-359
issn 0028-0836
1476-4687
language eng
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subjects Adhesins, Bacterial - isolation & purification
Adhesins, Bacterial - physiology
Adhesins, Bacterial - ultrastructure
Amino Acid Sequence
Animals
Bacteria
Bacterial Adhesion - physiology
Bacterial Proteins - isolation & purification
Bacterial Proteins - physiology
Bacterial Proteins - ultrastructure
Bacteriology
Base Sequence
Biological and medical sciences
Cells, Cultured
Cellular biology
Cloning, Molecular
DNA, Bacterial
Epithelium - microbiology
Fimbriae Proteins
Fimbriae, Bacterial - chemistry
Fimbriae, Bacterial - physiology
Fimbriae, Bacterial - ultrastructure
Fundamental and applied biological sciences. Psychology
Humanities and Social Sciences
Humans
letter
Mice
Mice, Inbred BALB C
Microbiology
Molecular Sequence Data
multidisciplinary
Neisseria gonorrhoeae
Neisseria gonorrhoeae - physiology
Neisseria gonorrhoeae - ultrastructure
Neisseria meningitidis
Neisseria meningitidis - physiology
Neisseria meningitidis - ultrastructure
Pathogenicity, virulence, toxins, bacteriocins, pyrogens, host-bacteria relations, miscellaneous strains
Pathogens
Peptides
Protein Binding
Proteins
Recombinant Proteins
Science
Science (multidisciplinary)
Species Specificity
title Neisseria PilC protein identified as type-4 pilus tip-located adhesin
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