ArticleNucleic acids research2017
Salmonella STM1697 coordinates flagella biogenesis and virulence by restricting flagellar master protein FlhD4C2 from recruiting RNA polymerase.
Article in Nucleic acids research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 33 citations in OpenAlex.
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Authors and funding
11 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Salmonella reduces flagella biogenesis to avoid detection within host cells by a largely unknown mechanism. We identified an EAL-like protein STM1697 as required and sufficient for this process. STM1697 surges to a high level after Salmonella enters host cells and restrains the expression of flagellar genes by regulating the function of flagellar switch protein FlhD4C2, the transcription activator of all other flagellar genes. Unlike other anti-FlhD4C2 factors, STM1697 does not prevent FlhD4C2 from binding to target DNA. A 2.0 Å resolution STM1697-FlhD structure reveals that STM1697 binds the same region of FlhD as STM1344, but with weaker affinity. Further experiments show that STM1697 regulates flagella biogenesis by restricting FlhD4C2 from recruiting RNA polymerase and the regulatory effect of STM1697 on flagellar biogenesis and virulence are all achieved by interaction with FlhD. Finally, we describe a novel mechanism mediated by STM1697 in which Salmonella can inhibit the production of flagella antigen and escape from the host immune system.
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