Evidence map›Paper›PMID 34250906›Full record

ArticleeLife2021

The fluoride permeation pathway and anion recognition in Fluc family fluoride channels.

Benjamin C McIlwain, Roja Gundepudi, B Ben Koff, Randy B Stockbridge

Open access · goldAbstract read
In one paragraph

Article in eLife, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

17 citing papers in PubMed, 21 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Fluorinated Protein-Ligand Complexes: A Computational Perspective.The journal of physical chemistry. B · 2024
    Review
  8. Review
  9. Review
  10. Article
  11. RecombinantmBio · 2024
    Article
  12. Article
  13. Article
  14. Dimerization mechanism of an inverted-topology ion channel in membranes.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  15. Article
  16. Article
  17. Article
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

4 authors at 1 institution in 1 country.

Benjamin C McIlwainDepartment of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, United States.
Roja GundepudiProgram in Biophysics, University of Michigan, Ann Arbor, United States.
B Ben KoffDepartment of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, United States.
Randy B StockbridgeDepartment of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, United States.ORCID 0000-0001-8848-3032
University of Michigan · US

Funding

Structural and functional analysis of novel microbial membrane proteinsR35GM128768 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI Randy B. Stockbridge · 2018 to 2026
$3.7M
NIGMS NIH HHS R35 GM128768
6 · The paper itself

Abstract

Fluc family fluoride channels protect microbes against ambient environmental fluoride by undermining the cytoplasmic accumulation of this toxic halide. These proteins are structurally idiosyncratic, and thus the permeation pathway and mechanism have no analogy in other known ion channels. Although fluoride-binding sites were identified in previous structural studies, it was not evident how these ions access aqueous solution, and the molecular determinants of anion recognition and selectivity have not been elucidated. Using x-ray crystallography, planar bilayer electrophysiology, and liposome-based assays, we identified additional binding sites along the permeation pathway. We used this information to develop an oriented system for planar lipid bilayer electrophysiology and observed anion block at one of these sites, revealing insights into the mechanism of anion recognition. We propose a permeation mechanism involving alternating occupancy of anion-binding sites that are fully assembled only as the substrate approaches.

Indexed as

AnionsBacterial ProteinsBinding SitesBiophysical PhenomenaCrystallography, X-RayElectrophysiologyFluoridesGlutamic AcidIon ChannelsModels, MolecularProtein ConformationAnionsBacterial ProteinsFluoridesGlutamic AcidIon Channelsbiochemistrybordetella pertussischemical biologyE. colifluorideion channelmolecular biophysicsstructural biology

Identifiers

PMID34250906
PMCPMC8315801
OpenAlexW3179396995

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.