ArticleNucleic acids research2021
Saturation mutagenesis charts the functional landscape of Salmonella ProQ and reveals a gene regulatory function of its C-terminal domain.
Article in Nucleic acids research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed.
- OmrA sRNA inhibits translation of phosphoenolpyruvate carboxylase to impair TCA-cycle flux.Nucleic acids research · 2026Article
- An RNA structural switch controlling bacterial toxin translation.Nucleic acids research · 2026Article
- Structural dependence of ProQ-mRNA interactions in live bacterial cells.Communications biology · 2025Article
- Different RNA recognition by ProQ and FinO depends on the sequence surrounding intrinsic terminator hairpins.RNA (New York, N.Y.) · 2025Article
- RNA recognition by minimal ProQ fromRNA (New York, N.Y.) · 2025Article
- ProQ prevents mRNA degradation through inhibition of poly(A) polymerase.Nucleic acids research · 2025Article
- ProQ-dependent activation ofmSphere · 2024Article
- Biochemical and genetic dissection of the RNA-binding surface of the FinO domain ofRNA (New York, N.Y.) · 2023Article
- Biochemical and genetic dissection of the RNA-binding surface of the FinO domain ofbioRxiv : the preprint server for biology · 2023Article
- FinO/ProQ-family proteins: an evolutionary perspective.Bioscience reports · 2023Review
- Article
- Structural basis for recognition of transcriptional terminator structures by ProQ/FinO domain RNA chaperones.Nature communications · 2022Article
- The Role and Targets of the RNA-Binding Protein ProQ in the Gram-Negative Bacterial Pathogen Pasteurella multocida.Journal of bacteriology · 2022Article
- Bacterial RNA chaperones and chaperone-like riboregulators: behind the scenes of RNA-mediated regulation of cellular metabolism.RNA biology · 2022Article
- Scanning mutagenesis of RNA-binding protein ProQ reveals a quality control role for the Lon protease.RNA (New York, N.Y.) · 2021Article
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4 authors.
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Abstract
The global RNA-binding protein ProQ has emerged as a central player in post-transcriptional regulatory networks in bacteria. While the N-terminal domain (NTD) of ProQ harbors the major RNA-binding activity, the role of the ProQ C-terminal domain (CTD) has remained unclear. Here, we have applied saturation mutagenesis coupled to phenotypic sorting and long-read sequencing to chart the regulatory capacity of Salmonella ProQ. Parallel monitoring of thousands of ProQ mutants allowed mapping of critical residues in both the NTD and the CTD, while the linker separating these domains was tolerant to mutations. Single amino acid substitutions in the NTD associated with abolished regulatory capacity strongly align with RNA-binding deficiency. An observed cellular instability of ProQ associated with mutations in the NTD suggests that interaction with RNA protects ProQ from degradation. Mutation of conserved CTD residues led to overstabilization of RNA targets and rendered ProQ inert in regulation, without affecting protein stability in vivo. Furthermore, ProQ lacking the CTD, although binding competent, failed to protect an mRNA target from degradation. Together, our data provide a comprehensive overview of residues important for ProQ-dependent regulation and reveal an essential role for the enigmatic ProQ CTD in gene regulation.
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