Evidence map›Paper›PMID 33563762›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Staphylococcal protein A inhibits complement activation by interfering with IgG hexamer formation.

Ana Rita Cruz, Maurits A den Boer, Jürgen Strasser, Seline A Zwarthoff, Frank J Beurskens, Carla J C de Haas, Piet C Aerts, Guanbo Wang, Rob N de Jong, Fabio Bagnoli and 6 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers.

0numbers the graph read from it
0cells of the map it votes in
72citing papers in PubMed
6.4field-weighted citation impact, top 2% 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

72 citing papers in PubMed, 105 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Review
  5. Review
  6. A viral glycoprotein targets IgGEMBO molecular medicine · 2026
    Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Full-Length Context Disrupts Folding of IgG-Binding Domains of Protein A.bioRxiv : the preprint server for biology · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  19. Review
  20. Review

12 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

16 authors at 5 institutions in 4 countries.

Ana Rita CruzMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands.
Maurits A den BoerBijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht, The Netherlands.ORCID 0000-0002-2608-9395
Jürgen StrasserNano Structuring and Bio-Analytics Group, TIMed Center, University of Applied Sciences Upper Austria, 4020 Linz, Austria.ORCID 0000-0002-9722-702X
Seline A ZwarthoffMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands.ORCID 0000-0002-4395-2007
Frank J BeurskensGenmab, 3508 AD Utrecht, The Netherlands.
Carla J C de HaasMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands.
Piet C AertsMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands.
Guanbo WangBijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht, The Netherlands.
Rob N de JongGenmab, 3508 AD Utrecht, The Netherlands.ORCID 0000-0002-9300-6633
Fabio BagnoliGlaxoSmithKline (GSK) Siena, 53100 Siena, Italy.
Jos A G van StrijpMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands.ORCID 0000-0001-6253-0830
Kok P M van KesselMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands.
Janine SchuurmanGenmab, 3508 AD Utrecht, The Netherlands.ORCID 0000-0002-9738-9926
Johannes PreinerNano Structuring and Bio-Analytics Group, TIMed Center, University of Applied Sciences Upper Austria, 4020 Linz, Austria.ORCID 0000-0002-6755-6543
Albert J R HeckBijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht, The Netherlands.ORCID 0000-0002-2405-4404
Suzan H M RooijakkersMedical Microbiology, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, The Netherlands; S.H.M.Rooijakkers@umcutrecht.nl.ORCID 0000-0003-4102-0377
Utrecht University · NLGenmab (Netherlands) · NLUniversity of Applied Sciences Upper Austria · ATGlaxoSmithKline (Italy) · ITNanjing Normal University · CN

Funding

Austrian Science Fund FWF P 33958Austrian Science Fund FWF P 34164
6 · The paper itself

Abstract

Immunoglobulin (Ig) G molecules are essential players in the human immune response against bacterial infections. An important effector of IgG-dependent immunity is the induction of complement activation, a reaction that triggers a variety of responses that help kill bacteria. Antibody-dependent complement activation is promoted by the organization of target-bound IgGs into hexamers that are held together via noncovalent Fc-Fc interactions. Here we show that staphylococcal protein A (SpA), an important virulence factor and vaccine candidate of

Indexed as

Complement ActivationProtein MultimerizationBinding SitesCells, CulturedHumansImmunoglobulin Fc FragmentsImmunoglobulin GPhagocytesPhagocytosisProtein BindingStaphylococcal Protein AStaphylococcus aureusImmunoglobulin Fc FragmentsImmunoglobulin GStaphylococcal Protein AantibodiescomplementIgG hexamerizationstaphylococcal protein AStaphylococcus aureus

Identifiers

PMID33563762
PMCPMC7896290
OpenAlexW3127046227

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.