Evidence map›Paper›PMID 29076571›Full record

ArticleMolecular microbiology2018

Type-III secretion pore formed by flagellar protein FliP.

Elizabeth Ward, Thibaud T Renault, Eun A Kim, Marc Erhardt, Kelly T Hughes, David F Blair

Open access · bronzeAbstract read
In one paragraph

Article in Molecular microbiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.9field-weighted citation impact, top 9% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 35 citations in OpenAlex.

  1. 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 · 2025
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  12. The FlgN chaperone activates the NaCommunications biology · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Elizabeth WardDepartment of Biology, University of Utah, Salt Lake City, UT, 84112, USA.
Thibaud T RenaultHelmholtz Centre for Infection Research, Inhoffenstr. 7, Braunschweig, 38124, Germany.
Eun A KimDepartment of Biology, University of Utah, Salt Lake City, UT, 84112, USA.
Marc ErhardtHelmholtz Centre for Infection Research, Inhoffenstr. 7, Braunschweig, 38124, Germany.ORCID http://orcid.org/0000-0001-6292-619X
Kelly T HughesDepartment of Biology, University of Utah, Salt Lake City, UT, 84112, USA.
David F BlairDepartment of Biology, University of Utah, Salt Lake City, UT, 84112, USA.ORCID http://orcid.org/0000-0003-3836-0549
University of Utah · USHelmholtz Centre for Infection Research · DEMax Planck Institute for Infection Biology · DE

Funding

Coupling gene regulation to flagellar morphogenesisR01GM056141 · NIGMS · UNIVERSITY OF WASHINGTON · PI HUGHES, KELLY T · 1998 to 2023
$8.3M
Structure and Mechanism of the Flagellar Switch ComplexR01GM064664 · NIGMS · UNIVERSITY OF UTAH · PI BLAIR, DAVID F., CRANE, BRIAN R · 2003 to 2017
$4.1M
Mechanism of flagellar type-III secretionR01GM087260 · NIGMS · UNIVERSITY OF UTAH · PI BLAIR, DAVID F. · 2009 to 2010
$485k
NIGMS NIH HHS R01 GM056141NIGMS NIH HHS R01 GM064664NIGMS NIH HHS R01 GM087260
6 · The paper itself

Abstract

During assembly of the bacterial flagellum, protein subunits that form the exterior structures are exported through a specialized secretion apparatus energized by the proton gradient. This category of protein transport, together with the similar process that occurs in the injectisomes of gram-negative pathogens, is termed type-III secretion. The membrane-embedded part of the flagellar export apparatus contains five essential proteins: FlhA, FlhB, FliP, FliQ and FliR. Here, we have undertaken a variety of experiments that together support the proposal that the protein-conducting conduit is formed primarily, and possibly entirely, by FliP. Chemical modification experiments demonstrate that positions near the center of certain FliP trans-membrane (TM) segments are accessible to polar reagents. FliP expression sensitizes cells to a number of chemical agents, and mutations at predicted channel-facing positions modulate this effect. Multiple assays are used to show that FliP suffices to form a channel that can conduct a variety of medium-sized, polar molecules. Conductance properties are strongly modulated by mutations in a methionine-rich loop that is predicted to lie at the inner mouth of the channel, which might form a gasket around cargo molecules undergoing export. The results are discussed in the framework of an hypothesis for the architecture and action of the cargo-conducting part of the type-III secretion apparatus.

Indexed as

Bacterial ProteinsEscherichia coli ProteinsFlagellaMembrane ProteinsProtein TransportSalmonella entericaType III Secretion SystemsBacterial ProteinsEscherichia coli ProteinsFliP protein, E coliMembrane ProteinsType III Secretion Systems

Identifiers

PMID29076571
PMCPMC5739974
OpenAlexW2767725568

What OpenQuestion holds

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Registered trials

None linked

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.