Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 298

The DOI matches its Crossref record; 48 of the 48 references it cites were found in a registry or an index.

Competence-programmed predation of noncompetent cells in the human pathogen Streptococcus pneumoniae : Genetic requirements

Open access
Guiral, Sébastien, Mitchell, Tim J., Martin, Bernard, Claverys, Jean-Pierre·2005·Proceedings of the National Academy of Sciences

Abstract

Natural competence for genetic transformation is the best-characterized feature of the major human pathogen Streptococcus pneumoniae . Recent studies have shown the virulence of competence-deficient mutants to be attenuated, but the nature of the connection between competence and virulence remained unknown. Here we document the release, triggered by competent cells, of virulence factors (e.g., the cytolytic toxin pneumolysin) from noncompetent cells. This phenomenon, which we name allolysis, involves a previously undescribed bacteriocin system consisting of a two-peptide bacteriocin, CibAB, and its immunity factor, CibC; the major autolysin, LytA, and lysozyme, LytC; and a proposed new amidase, CbpD. We show that CibAB are absolutely required for allolysis, whereas LytA and LytC can be supplied either by the competent cells or by the targeted cells. We propose that allolysis constitutes a competence-programmed mechanism of predation of noncompetent cells, which benefits to the competent cells and contributes to virulence by coordinating the release of virulence factors.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.0500879102

Cites

48 of 48 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 48 references

Cited by

See all 298

Metadata

Authors
Guiral, S., Mitchell, T. J., Martin, B., & Claverys, J.-P.
Venue
Proceedings of the National Academy of Sciences
Published
2005-05-31
Volume
102
Issue
24
Pages
8710-8715
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1641873288
Cited by
298
References
48
FWCI
10.08
Type
journal article
Language
en
Open access
green

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Competence-programmed predation of noncompetent cells in the human pathogen Streptococcus pneumoniae : Genetic requirements. https://app.cochat.ai/papers/10.1073/pnas.0500879102
The paper
Guiral, S., Mitchell, T. J., Martin, B., & Claverys, J.-P. (2005). Competence-programmed predation of noncompetent cells in the human pathogen Streptococcus pneumoniae : Genetic requirements. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0500879102

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.