Evidence map›Paper›PMID 25025708›Full record

ArticleToxins2014

Identification of distinct Bacillus thuringiensis 4A4 nematicidal factors using the model nematodes Pristionchus pacificus and Caenorhabditis elegans.

Igor Iatsenko, Angel Nikolov, Ralf J Sommer

Open access · goldAbstract read
In one paragraph

Article in Toxins, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.3field-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

11 citing papers in PubMed, 24 citations in OpenAlex.

  1. Chemotaxis ofMicroorganisms · 2023
    Article
  2. MultipleInternational journal of molecular sciences · 2023
    Article
  3. The immunostimulatory role of anFrontiers in insect science · 2023
    Article
  4. Article
  5. Review
  6. Repertoire of theToxins · 2019
    Review
  7. Article
  8. Genetic and Biochemical Characterization of a Gene Operon forThe Journal of biological chemistry · 2017
    Article
  9. Rhizobacteria with nematicide aptitude: enzymes and compounds associated.World journal of microbiology & biotechnology · 2016
    Review
  10. Article
  11. Bacterial Vegetative Insecticidal Proteins (Vip) from Entomopathogenic Bacteria.Microbiology and molecular biology reviews : MMBR · 2016
    Review
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

3 authors at 2 institutions in 1 country.

Igor IatsenkoDepartment for Evolutionary Biology, Max-Planck Institute for Developmental Biology, Spemannstrasse 37, 72076 Tuebingen, Germany. igor.iatsenko@tuebingen.mpg.de.
Angel NikolovInstitute for Chemistry and Biochemistry, Free University of Berlin, Thielallee 63, 14195 Berlin, Germany. angelnikolov17@yahoo.com.
Ralf J SommerDepartment for Evolutionary Biology, Max-Planck Institute for Developmental Biology, Spemannstrasse 37, 72076 Tuebingen, Germany. ralf.sommer@tuebingen.mpg.de.
Max Planck Institute for Developmental Biology · DEFreie Universität Berlin · DE

Funding

Enhancing and expanding the CGC Strain CollectionP40OD010440 · OD · UNIVERSITY OF MINNESOTA · PI Ann E. Rougvie · 2012 to 2026
$7.5M
NIH HHS P40 OD010440
6 · The paper itself

Abstract

Bacillus thuringiensis has been extensively used for the biological control of insect pests. Nematicidal B. thuringiensis strains have also been identified; however, virulence factors of such strains are poorly investigated. Here, we describe virulence factors of the nematicidal B. thuringiensis 4A4 strain, using the model nematodes Pristionchus pacificus and Caenorhabditis elegans. We show that B. thuringiensis 4A4 kills both nematodes via intestinal damage. Whole genome sequencing of B. thuringiensis 4A4 identified Cry21Ha, Cry1Ba, Vip1/Vip2 and β-exotoxin as potential nematicidal factors. Only Cry21Ha showed toxicity to C. elegans, while neither Cry nor Vip toxins were active against P. pacificus, when expressed in E. coli. Purified crystals also failed to intoxicate P. pacificus, while autoclaved spore-crystal mixture of B. thuringiensis 4A4 retained toxicity, suggesting that primary β-exotoxin is responsible for P. pacificus killing. In support of this, we found that a β-exotoxin-deficient variant of B. thuringiensis 4A4, generated by plasmid curing lost virulence to the nematodes. Thus, using two model nematodes we revealed virulence factors of the nematicidal strain B. thuringiensis 4A4 and showed the multifactorial nature of its virulence.

Indexed as

AnimalsAntinematodal AgentsBacillus thuringiensisBacterial ProteinsBacterial ToxinsChemotaxisIntestinesNematodaVirulence FactorsAntinematodal AgentsBacterial ProteinsBacterial ToxinsVirulence Factors

Identifiers

PMID25025708
PMCPMC4113741
OpenAlexW2033117987

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.