Evidence map›Paper›PMID 24703306›Full record

ArticleBiophysical journal2014

pH-Controlled two-step uncoating of influenza virus.

Sai Li, Christian Sieben, Kai Ludwig, Chris T Höfer, Salvatore Chiantia, Andreas Herrmann, Frederic Eghiaian, Iwan A T Schaap

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed, 1 pooled it
5.6field-weighted citation impact, top 3% 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

66 citing papers in PubMed, 1 synthesis or guideline pooled it, 123 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Fatty acid 2-hydroxylase facilitates rotavirus uncoating and endosomal escape.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  4. Article
  5. Review
  6. Molecular patterns of matrix protein 1 (M1): A strong predictor of adaptive evolution in H9N2 avian influenza viruses.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. The Art of Viral Membrane Fusion and Penetration.Sub-cellular biochemistry · 2023
    Article
  18. Article
  19. Article
  20. Review

6 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

8 authors at 4 institutions in 1 country.

Sai LiDrittes Physikalisches Institut, Georg-August-Universität, Göttingen, Germany.
Christian SiebenInstitut für Biologie, AG Molekulare Biophysik, Humboldt-Universität zu Berlin, Berlin, Germany.
Kai LudwigInstitut für Chemie und Biochemie, Forschungszentrum für Elektronenmikroskopie, Freie Universität Berlin, Berlin, Germany.
Chris T HöferInstitut für Biologie, AG Molekulare Biophysik, Humboldt-Universität zu Berlin, Berlin, Germany.
Salvatore ChiantiaInstitut für Biologie, AG Molekulare Biophysik, Humboldt-Universität zu Berlin, Berlin, Germany.
Andreas HerrmannInstitut für Biologie, AG Molekulare Biophysik, Humboldt-Universität zu Berlin, Berlin, Germany. Electronic address: andreas.herrmann@rz.hu-berlin.de.
Frederic EghiaianDrittes Physikalisches Institut, Georg-August-Universität, Göttingen, Germany; Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany. Electronic address: frederic.eghiaian@inserm.fr.
Iwan A T SchaapDrittes Physikalisches Institut, Georg-August-Universität, Göttingen, Germany; Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany.
Humboldt-Universität zu Berlin · DEUniversity of Göttingen · DEFreie Universität Berlin · DENanoscale Microscopy and Molecular Physiology of the Brain Cluster of Excellence 171 — DFG Research Center 103 · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Upon endocytosis in its cellular host, influenza A virus transits via early to late endosomes. To efficiently release its genome, the composite viral shell must undergo significant structural rearrangement, but the exact sequence of events leading to viral uncoating remains largely speculative. In addition, no change in viral structure has ever been identified at the level of early endosomes, raising a question about their role. We performed AFM indentation on single viruses in conjunction with cellular assays under conditions that mimicked gradual acidification from early to late endosomes. We found that the release of the influenza genome requires sequential exposure to the pH of both early and late endosomes, with each step corresponding to changes in the virus mechanical response. Step 1 (pH 7.5-6) involves a modification of both hemagglutinin and the viral lumen and is reversible, whereas Step 2 (pH <6.0) involves M1 dissociation and major hemagglutinin conformational changes and is irreversible. Bypassing the early-endosomal pH step or blocking the envelope proton channel M2 precludes proper genome release and efficient infection, illustrating the importance of viral lumen acidification during the early endosomal residence for influenza virus infection.

Indexed as

Virus UncoatingAnimalsCryoelectron MicroscopyDogsEndosomesGenome, ViralHemagglutinin Glycoproteins, Influenza VirusHydrogen-Ion ConcentrationInfluenza A Virus, H3N2 SubtypeLiposomesMadin Darby Canine Kidney CellsMechanical PhenomenaMicroscopy, Atomic ForceProtein ConformationRibonucleoproteinsViral Matrix ProteinsHemagglutinin Glycoproteins, Influenza VirusLiposomesM2 protein, Influenza A virusRibonucleoproteinsViral Matrix ProteinsViral ProteinsViroporin Proteins

Identifiers

PMID24703306
PMCPMC3976520
OpenAlexW2154129414

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.