Evidence map›Paper›PMID 15292133›Full record

ArticleJournal of bacteriology2004

The usher N terminus is the initial targeting site for chaperone-subunit complexes and participates in subsequent pilus biogenesis events.

Tony W Ng, Leyla Akman, Mary Osisami, David G Thanassi

Erratum issuedAbstract read
In one paragraph

Article in Journal of bacteriology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
–field-weighted citation impact
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

40 citing papers in PubMed.

  1. Review
  2. Structural basis for adhesin secretion by the outer-membrane usher in type 1 pili.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Domain activities of PapC usher reveal the mechanism of action of an Escherichia coli molecular machine.Proceedings of the National Academy of Sciences of the United States of America · 2012
    Article
  18. Chaperone-usher pathways: diversity and pilus assembly mechanism.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2012
    Review
  19. Article
  20. Article
4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

4 authors.

Tony W NgCenter for Infectious Diseases, Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794-5120, USA.
Leyla Akman
Mary Osisami
David G Thanassi

Funding

Mechanism of the Usher in Assembly and Secretion of PiliR01GM062987 · NIGMS · STATE UNIVERSITY NEW YORK STONY BROOK · PI David G Thanassi · 2001 to 2026
$7.7M
NIGMS NIH HHS GM62987NIGMS NIH HHS R01 GM062987
6 · The paper itself

Abstract

Pilus biogenesis on the surface of uropathogenic Escherichia coli requires the chaperone/usher pathway, a terminal branch of the general secretory pathway. In this pathway, periplasmic chaperone-subunit complexes target an outer membrane (OM) usher for subunit assembly into pili and secretion to the cell surface. The molecular mechanisms of protein secretion across the OM are not well understood. Mutagenesis of the P pilus usher PapC and the type 1 pilus usher FimD was undertaken to elucidate the initial stages of pilus biogenesis at the OM. Deletion of residues 2 to 11 of the mature PapC N terminus abolished the targeting of the usher by chaperone-subunit complexes and rendered PapC nonfunctional for pilus biogenesis. Similarly, an intact FimD N terminus was required for chaperone-subunit binding and pilus biogenesis. Analysis of PapC-FimD chimeras and N-terminal fragments of PapC localized the chaperone-subunit targeting domain to the first 124 residues of PapC. Single alanine substitution mutations were made in this domain that blocked pilus biogenesis but did not affect targeting of chaperone-subunit complexes. Thus, the usher N terminus does not function simply as a static binding site for chaperone-subunit complexes but also participates in subsequent pilus assembly events.

Indexed as

Protein Interaction MappingAmino Acid SequenceAmino Acid SubstitutionBacterial Outer Membrane ProteinsBacterial ProteinsConserved SequenceEscherichia coliEscherichia coli ProteinsFimbriae, BacterialFimbriae ProteinsGenes, BacterialMolecular ChaperonesMolecular Sequence DataMorphogenesisMutagenesis, InsertionalMutationatpG protein, E coliBacterial Outer Membrane ProteinsBacterial ProteinsEscherichia coli ProteinsFimbriae ProteinsfimD protein, bacteriafimD protein, E coliMolecular ChaperonesPeriplasmic ProteinsPorinsProtein Subunits

Identifiers

PMID15292133
PMCPMC490915

What OpenQuestion holds

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Registered trials

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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.