ArticleMolecular microbiology2017
Mechanism of type-III protein secretion: Regulation of FlhA conformation by a functionally critical charged-residue cluster.
Article in Molecular microbiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
43 citing papers in PubMed.
- Global expression profile of enterohemorrhagic Escherichia coli O157:H7 in phagosome of murine macrophages.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2026Article
- Structure of the proton-powered secretion motor at the heart of the bacterial flagellum.bioRxiv : the preprint server for biology · 2026Article
- A β-cap on the FliPQR protein-export channel acts as the cap for initial flagellar rod assembly.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- A biofilm-tropiceLife · 2025Article
- Bacterial motility depends on a critical flagellum length and energy-optimized assembly.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Structure and Dynamics of the Bacterial Flagellar Motor Complex.Biomolecules · 2024Review
- Genomic characterization of extended-spectrum beta-lactamase-producing and carbapenem-resistant Escherichia coli from urban wastewater in Australia.MicrobiologyOpen · 2024Article
- Membrane platform protein PulF of themBio · 2024Article
- Quantifying Substrate Protein Secretion via the Type III Secretion System of the Bacterial Flagellum.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Virulence-associated type III secretion systems in Gram-negative bacteria.Microbiology (Reading, England) · 2023Review
- Purification of the Transmembrane Polypeptide Channel Complex of the Salmonella Flagellar Type III Secretion System.Methods in molecular biology (Clifton, N.J.) · 2023Article
- Crystals of SctV from different species reveal variable symmetry for the cytosolic domain of the type III secretion system export gate.Acta crystallographica. Section F, Structural biology communications · 2022Article
- Targeting early proximal-rod component substrate FlgB to FlhB for flagellar-type III secretion in Salmonella.PLoS genetics · 2022Article
- Type III secretion by Yersinia pseudotuberculosis is reliant upon an authentic N-terminal YscX secretor domain.Molecular microbiology · 2022Article
- Recognition of discrete export signals in early flagellar subunits during bacterial type III secretion.eLife · 2022Article
- Insight Into Distinct Functional Roles of the Flagellar ATPase Complex for Flagellar Assembly inFrontiers in microbiology · 2022Review
- Structural and Functional Analysis of SsaV Cytoplasmic Domain and Variable Linker States in the Context of the InvA-SsaV Chimeric Protein.Microbiology spectrum · 2021Article
- Membrane voltage-dependent activation mechanism of the bacterial flagellar protein export apparatus.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Structure of the cytoplasmic domain of SctV (SsaV) from the Salmonella SPI-2 injectisome and implications for a pH sensing mechanism.Journal of structural biology · 2021Article
- A positive charge region of Salmonella FliI is required for ATPase formation and efficient flagellar protein export.Communications biology · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
Abstract
The bacterial flagellum contains a specialized secretion apparatus in its base that pumps certain protein subunits through the growing structure to their sites of installation beyond the membrane. A related apparatus functions in the injectisomes of gram-negative pathogens to export virulence factors into host cells. This mode of protein export is termed type-III secretion (T3S). Details of the T3S mechanism are unclear. It is energized by the proton gradient; here, a mutational approach was used to identify proton-binding groups that might function in transport. Conserved proton-binding residues in all the membrane components were tested. The results identify residues R147, R154 and D158 of FlhA as most critical. These lie in a small, well-conserved cytoplasmic domain of FlhA, located between transmembrane segments 4 and 5. Two-hybrid experiments demonstrate self-interaction of the domain, and targeted cross-linking indicates that it forms a multimeric array. A mutation that mimics protonation of the key acidic residue (D158N) was shown to trigger a global conformational change that affects the other, larger cytoplasmic domain that interacts with the export cargo. The results are discussed in the framework of a transport model based on proton-actuated movements in the cytoplasmic domains of FlhA.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.