Evidence map›Paper›PMID 25605714›Full record

ArticleThe Journal of biological chemistry2015

Recognition of bacterial signal peptides by mammalian formyl peptide receptors: a new mechanism for sensing pathogens.

Bernd Bufe, Timo Schumann, Reinhard Kappl, Ivan Bogeski, Carsten Kummerow, Marta Podgórska, Sigrun Smola, Markus Hoth, Frank Zufall

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 4% 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

65 citing papers in PubMed, 1 synthesis or guideline pooled it, 97 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Cross-Platform Biosensing of Immune Receptors Using Peptide-Functionalized Graphene.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
  5. Article
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  7. Article
  8. Antimicrobial Peptide Signaling in Skin Diseases.JID innovations : skin science from molecules to population health · 2025
    Review
  9. TheFrontiers in immunology · 2025
    Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Review
  15. Review
  16. Article
  17. Article
  18. Review
  19. Review
  20. Article

5 more citing papers are in PubMed but not listed here.

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

9 authors at 1 institution in 1 country.

Bernd BufeFrom the Departments of Physiology, bernd.bufe@uks.eu.
Timo SchumannFrom the Departments of Physiology.
Reinhard KapplBiophysics, and.
Ivan BogeskiBiophysics, and.
Carsten KummerowBiophysics, and.
Marta PodgórskaVirology, University of Saarland School of Medicine, 66421 Homburg, Germany.
Sigrun SmolaVirology, University of Saarland School of Medicine, 66421 Homburg, Germany.
Markus HothBiophysics, and.
Frank ZufallFrom the Departments of Physiology.
Saarland University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Formyl peptide receptors (FPRs) are G-protein-coupled receptors that function as chemoattractant receptors in innate immune responses. Here we perform systematic structure-function analyses of FPRs from six mammalian species using structurally diverse FPR peptide agonists and identify a common set of conserved agonist properties with typical features of pathogen-associated molecular patterns. Guided by these results, we discover that bacterial signal peptides, normally used to translocate proteins across cytoplasmic membranes, are a vast family of natural FPR agonists. N-terminally formylated signal peptide fragments with variable sequence and length activate human and mouse FPR1 and FPR2 at low nanomolar concentrations, thus establishing FPR1 and FPR2 as sensitive and broad signal peptide receptors. The vomeronasal receptor mFpr-rs1 and its sequence orthologue hFPR3 also react to signal peptides but are much more narrowly tuned in signal peptide recognition. Furthermore, all signal peptides examined here function as potent activators of the innate immune system. They elicit robust, FPR-dependent calcium mobilization in human and mouse leukocytes and trigger a range of classical innate defense mechanisms, such as the production of reactive oxygen species, metalloprotease release, and chemotaxis. Thus, bacterial signal peptides constitute a novel class of immune activators that are likely to contribute to mammalian immune defense against bacteria. This evolutionarily conserved detection mechanism combines structural promiscuity with high specificity and enables discrimination between bacterial and eukaryotic signal sequences. With at least 175,542 predicted sequences, bacterial signal peptides represent the largest and structurally most heterogeneous class of G-protein-coupled receptor agonists currently known for the innate immune system.

Indexed as

Protein Sorting SignalsAmino Acid SequenceBacteriaBacterial ProteinsHEK293 CellsHumansMolecular Sequence DataReceptors, Formyl PeptideBacterial ProteinsProtein Sorting SignalsReceptors, Formyl PeptideCalcium ImagingChemical BiologyG-protein-coupled Receptor (GPCR)Innate ImmunityMolecular PharmacologyPathogen-associated Molecular Pattern (PAMP)Pattern Recognition Receptor (PRR)Vomeronasal Organ (VNO)

Identifiers

PMID25605714
PMCPMC4367248
OpenAlexW1996562688

What OpenQuestion holds

Textmetadata
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.