Evidence map›Paper›PMID 9529113›Full record

ArticleInfection and immunity1998

Identification and temperature regulation of Legionella pneumophila genes involved in type IV pilus biogenesis and type II protein secretion.

M R Liles, V K Viswanathan, N P Cianciotto

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
5.8field-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

51 citing papers in PubMed, 109 citations in OpenAlex.

  1. Article
  2. Protein sociology of ProA, Mip and other secreted virulence factors at theFrontiers in cellular and infection microbiology · 2023
    Review
  3. Review
  4. Article
  5. Article
  6. Review
  7. Article
  8. Distribution of Secretion Systems in the GenusFrontiers in microbiology · 2017
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Biofilms: the stronghold of Legionella pneumophila.International journal of molecular sciences · 2013
    Review
  14. Review
  15. Type IV pilin proteins: versatile molecular modules.Microbiology and molecular biology reviews : MMBR · 2012
    Review
  16. Article
  17. Article
  18. 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 1 institution in 1 country.

M R LilesDepartment of Microbiology-Immunology, Northwestern University, Chicago, Illinois 60611, USA.
V K Viswanathan
N P Cianciotto
Northwestern University · US

Funding

GENETICS OF IRON ACQUISITION BY LEGIONELLA PNEUMOPHILAR01AI034937 · NIAID · NORTHWESTERN UNIVERSITY AT CHICAGO · PI CIANCIOTTO, NICHOLAS P · 1995 to 2014
$4.5M
MOLECULAR TOXICOLOGY TRAINING PROGRAMT32ES007284 · NIEHS · NORTHWESTERN UNIVERSITY · PI REDDY, JANARDAN K. · 1995 to 1999
–
NIAID NIH HHS AI34937NIAID NIH HHS R01 AI034937NIEHS NIH HHS ES07284NIEHS NIH HHS T32 ES007284
6 · The paper itself

Abstract

Previously, we had isolated by transposon mutagenesis a Legionella pneumophila mutant that appeared defective for intracellular iron acquisition. While sequencing in the proximity of the mini-Tn10 insertion, we found a locus that had a predicted protein product with strong similarity to PilB from Pseudomonas aeruginosa. PilB is a component of the type II secretory pathway, which is required for the assembly of type IV pili. Consequently, the locus was cloned and sequenced. Within this 4-kb region were three genes that appeared to be organized in an operon and encoded homologs of P. aeruginosa PilB, PilC, and PilD, proteins essential for pilus production and type II protein secretion. Northern blot analysis identified a transcript large enough to include all three genes and showed a substantial increase in expression of this operon when L. pneumophila was grown at 30 degrees C as opposed to 37 degrees C. The latter observation was then correlated with an increase in piliation when bacteria were grown at the lower temperature. Southern hybridization analysis indicated that the pilB locus was conserved within L. pneumophila serogroups and other Legionella species. These data represent the first isolation of type II secretory genes from an intracellular parasite and indicate that the legionellae express temperature-regulated type IV pili.

Indexed as

Genes, BacterialAmino Acid SequenceBacterial Outer Membrane ProteinsBacterial ProteinsBase SequenceFimbriae, BacterialFimbriae ProteinsLegionella pneumophilaMolecular Sequence DataOpen Reading FramesTemperatureBacterial Outer Membrane ProteinsBacterial ProteinsFimbriae Proteins

Identifiers

PMID9529113
PMCPMC108120
OpenAlexW2110479995

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.