Evidence map›Paper›PMID 31974369›Full record

ArticleNature communications2020

The C. difficile toxin B membrane translocation machinery is an evolutionarily conserved protein delivery apparatus.

Kathleen E Orrell, Michael J Mansfield, Andrew C Doxey, Roman A Melnyk

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2020. 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
0.5field-weighted citation impact, top 21% 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, 34 citations in OpenAlex.

  1. Review
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  5. MappingmBio · 2025
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  15. Large Clostridial Toxins: Mechanisms and Roles in Disease.Microbiology and molecular biology reviews : MMBR · 2021
    Review
  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 2 institutions in 1 country.

Kathleen E OrrellMolecular Medicine Program, The Hospital for Sick Children Research Institute, Toronto, ON, M5G 0A4, Canada.ORCID http://orcid.org/0000-0002-2382-8543
Michael J MansfieldDepartment of Biology, University of Waterloo, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada.
Andrew C DoxeyDepartment of Biology, University of Waterloo, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada.ORCID http://orcid.org/0000-0003-2015-099X
Roman A MelnykMolecular Medicine Program, The Hospital for Sick Children Research Institute, Toronto, ON, M5G 0A4, Canada. roman.melnyk@sickkids.ca.ORCID http://orcid.org/0000-0002-7187-2362
University of Toronto · CAUniversity of Waterloo · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Large Clostridial Toxins (LCTs) are a family of six homologous protein toxins that are implicated in severe disease. LCTs infiltrate host cells using a translocation domain (LCT-T) that contains both cell-surface receptor binding sites and a membrane translocation apparatus. Despite much effort, LCT translocation remains poorly understood. Here we report the identification of 1104 LCT-T homologs, with 769 proteins from bacteria outside of clostridia. Sequences are widely distributed in pathogenic and host-associated species, in a variety of contexts and architectures. Consistent with these homologs being functional toxins, we show that a distant LCT-T homolog from Serratia marcescens acts as a pH-dependent translocase to deliver its effector into host cells. Based on evolutionary footprinting of LCT-T homologs, we further define an evolutionarily conserved translocase region that we show is an autonomous translocase capable of delivering heterologous cargo into host cells. Our work uncovers a broad class of translocating toxins and provides insights into LCT translocation.

Indexed as

Biological EvolutionAmino Acid SequenceAnimalsBacterial ProteinsBacterial ToxinsChlorocebus aethiopsCircular DichroismClostridioides difficileConserved SequenceEvolution, MolecularHCT116 CellsHost-Pathogen InteractionsHumansHydrogen-Ion ConcentrationProtein DomainsProtein TransportBacterial ProteinsBacterial ToxinstoxB protein, Clostridium difficile

Identifiers

PMID31974369
PMCPMC6978384
OpenAlexW3000828626

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.