Evidence map›Paper›PMID 15615856›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2005

An unusual signal peptide facilitates late steps in the biogenesis of a bacterial autotransporter.

Rose L Szabady, Janine H Peterson, Kristen M Skillman, Harris D Bernstein

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% 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

77 citing papers in PubMed, 1 synthesis or guideline pooled it, 134 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Multiplex, multimodal mapping of variant effects in secreted proteins.bioRxiv : the preprint server for biology · 2025
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  18. Article
  19. Microbiology spectrum · 2019
    Review
  20. Review

17 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

4 authors at 3 institutions in 1 country.

Rose L SzabadyGenetics and Biochemistry Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
Janine H Peterson
Kristen M Skillman
Harris D Bernstein
National Institutes of Health · USNational Institute of Diabetes and Digestive and Kidney Diseases · USWashington University in St. Louis · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bacterial autotransporters are proteins that use a C-terminal porin-like domain to facilitate the transport of an upstream "passenger domain" across the outer membrane. Although autotransporters are translocated across the inner membrane (IM) via the Sec pathway, some of them contain exceptionally long signal peptides distinguished by a unique N-terminal sequence motif. In this study, we used the Escherichia coli O157:H7 autotransporter EspP as a model protein to investigate the function of the unusual signal peptides. We found that removal of the N-terminal motif or replacement of the EspP signal peptide did not affect translocation of the protein across the IM. Remarkably, modification of the signal peptide caused EspP to misfold in the periplasm and blocked transport of the passenger domain across the outer membrane. Further analysis suggested that the EspP signal peptide transits slowly through the Sec machinery. Based on these results, we propose that the unusual signal peptides not only function as targeting signals, but also prevent misfolding of the passenger domain in the periplasm by transiently tethering it to the IM.

Indexed as

Escherichia coliEscherichia coli ProteinsProtein Processing, Post-TranslationalProtein Sorting SignalsProtein Structure, TertiaryProtein TransportSerine EndopeptidasesEscherichia coli ProteinsEspP protein, E coliProtein Sorting SignalsSerine Endopeptidases

Identifiers

PMID15615856
PMCPMC544056
OpenAlexW2105790696

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.