Evidence map›Paper›PMID 25644005›Full record

ArticleInfection and immunity2015

Protein A is released into the Staphylococcus aureus culture supernatant with an unprocessed sorting signal.

Dara P O'Halloran, Kieran Wynne, Joan A Geoghegan

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

31 citing papers in PubMed, 53 citations in OpenAlex.

  1. Article
  2. Article
  3. A Novel Interaction of Staphylococcal Protein A With Human Fibronectin and Its Implications in Host Cell Adhesion.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Staphylococcal protein A inhibits complement activation by interfering with IgG hexamer formation.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  12. Article
  13. Article
  14. The iron-regulated surface determinant B (IsdB) protein fromThe Journal of biological chemistry · 2020
    Article
  15. Article
  16. Review
  17. Frontiers in immunology · 2020
    Article
  18. Binding ofmBio · 2019
    Article
  19. Article
  20. 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

3 authors at 2 institutions in 1 country.

Dara P O'HalloranDepartment of Microbiology, Moyne Institute of Preventive Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland.
Kieran WynneProteomics Core Facility, Conway Institute, University College Dublin, Dublin, Ireland.
Joan A GeogheganDepartment of Microbiology, Moyne Institute of Preventive Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland geoghegj@tcd.ie.
Trinity College Dublin · IEUniversity College Dublin · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The immunoglobulin binding protein A (SpA) of Staphylococcus aureus is synthesized as a precursor with a C-terminal sorting signal. The sortase A enzyme mediates covalent attachment to peptidoglycan so that SpA is displayed on the surface of the bacterium. Protein A is also found in the extracellular medium, but the processes involved in its release are not fully understood. Here, we show that a portion of SpA is released into the supernatant with an intact sorting signal, indicating that it has not been processed by sortase A. Release of SpA was reduced when the native sorting signal of SpA was replaced with the corresponding region of another sortase-anchored protein (SdrE). Similarly, a reporter protein fused to the sorting signal of SpA was released to a greater extent than the same polypeptide fused to the SdrE sorting signal. Released SpA protected bacteria from killing in human blood, indicating that it contributes to immune evasion.

Indexed as

AminoacyltransferasesBacterial ProteinsCell WallCysteine EndopeptidasesEndopeptidasesHumansImmune EvasionPeptidoglycanProtein Structure, TertiaryRecombinant Fusion ProteinsSignal TransductionStaphylococcal InfectionsStaphylococcal Protein AStaphylococcus aureusAminoacyltransferasesBacterial ProteinsCysteine EndopeptidasesEndopeptidasesLytM protein, Staphylococcus aureusPeptidoglycanRecombinant Fusion ProteinsSdrE protein, Staphylococcus aureussortase AStaphylococcal Protein A

Identifiers

PMID25644005
PMCPMC4363444
OpenAlexW2099605135

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.