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Role of putative RNA-binding proteins in Campylobacter jejuni gene expression and virulence

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Campylobacter Campylobacter jejuni subsp. jejuni NCTC 11168 = ATCC 700819

PROVIDER: GSE35137 | GEO | 2012/12/31

SECONDARY ACCESSION(S): PRJNA150817

REPOSITORIES: GEO

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Role of putative RNA-binding proteins in Campylobacter jejuni gene expression and virulence

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Project description:Campylobacter jejuni, a zoonotic pathogen that frequently colonizes poultry, possesses two Microbial Surface Components Recognizing Adhesive Matrix Molecule(s) (MSCRAMMs) termed CadF and FlpA that bind to the glycoprotein fibronectin (FN). Previous to this study, it was not known whether the CadF and FlpA proteins were functionally redundant or if both were required to potentiate host cell binding and signaling processes. We addressed these questions by generating a complete repertoire of cadF and flpA mutants and complemented isolates, and performing multiple phenotypic assays. Both CadF and FlpA were found to be necessary for the maximal binding of C. jejuni to FN and to host cells. In addition, both CadF and FlpA are required for the delivery of the C. jejuni Cia effector proteins into the cytosol of host target cells, which in turn activates the MAPK signaling pathway (Erk 1/2) that is required for the C. jejuni invasion of host cells. These data demonstrate the non-redundant and bi-functional nature of these two C. jejuni FN-binding proteins. Taken together, the C. jejuni CadF and FlpA adhesins facilitate the binding of C. jejuni to the host cells, permit delivery of effector proteins into the cytosol of a host target cell, and aid in the rewiring of host cell signaling pathways to alter host cell behavior.

| S-EPMC7143056 | biostudies-literature

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