Evidence map›Paper›PMID 31166887›Full record

ArticleMicrobial genomics2019

Assessing the impact, genomics and evolution of type II secretion across a large, medically important genus: the Legionella type II secretion paradigm.

Richard C White, Nicholas P Cianciotto

Open access · goldAbstract read
In one paragraph

Article in Microbial genomics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.9field-weighted citation impact, top 10% 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

26 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
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  3. Molecular evolution and adaptations ofFrontiers in cellular and infection microbiology · 2026
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  5. mBio · 2025
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  7. Article
  8. Review
  9. Article
  10. Article
  11. Complete Genome Sequence of Legionella cardiaca Strain H63Microbiology resource announcements · 2023
    Article
  12. Article
  13. Article
  14. Review
  15. Microorganisms · 2023
    Article
  16. Cellular cholesterol licensesMicrobial cell (Graz, Austria) · 2023
    Article
  17. Protein sociology of ProA, Mip and other secreted virulence factors at theFrontiers in cellular and infection microbiology · 2023
    Review
  18. Review
  19. Review
  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

2 authors at 1 institution in 1 country.

Richard C White1 Department of Microbiology and Immunology, Northwestern University Medical School, Chicago, IL 60611, USA.
Nicholas P Cianciotto1 Department of Microbiology and Immunology, Northwestern University Medical School, Chicago, IL 60611, USA.
Northwestern University · US

Funding

TYPE II SECRETION AND LEGIONELLA PNEUMOPHILA INFECTIONR01AI043987 · NIAID · NORTHWESTERN UNIVERSITY AT CHICAGO · PI CIANCIOTTO, NICHOLAS P · 1999 to 2017
$4.8M
NIAID NIH HHS R01 AI043987
6 · The paper itself

Abstract

The type II secretion system (T2SS) plays a major role in promoting bacterial survival in the environment and in human hosts. One of the best characterized T2SS is that of Legionella pneumophila, the agent of Legionnaires' disease. Secreting at least 25 proteins, including degradative enzymes, eukaryotic-like proteins and novel effectors, this T2SS contributes to the ability of L. pneumophila to grow at low temperatures, infect amoebal and macrophage hosts, damage lung tissue, evade the immune system, and undergo sliding motility. The genes encoding the T2SS are conserved across the genus Legionella, which includes 62 species and >30 pathogens in addition to L. pneumophila. The vast majority of effectors associated with L. pneumophila are shared by a large number of Legionella species, hinting at a critical role for them in the ecology of Legionella as a whole. However, no other species has the same repertoire as L. pneumophila, with, as a general rule, phylogenetically more closely related species sharing similar sets of effectors. T2SS effectors that are involved in infection of a eukaryotic host(s) are more prevalent throughout Legionella, indicating that they are under stronger selective pressure. The Legionella T2SS apparatus is closest to that of Aquicella (another parasite of amoebae), and a significant number of L. pneumophila effectors have their closest homologues in Aquicella. Thus, the T2SS of L. pneumophila probably originated within the order Legionellales, with some of its effectors having arisen within that Aquicella-like progenitor, while other effectors derived from the amoebal host, mimiviruses, fungi and less closely related bacteria.

Indexed as

Bacterial ProteinsGenome, BacterialGenomicsHumansLegionellaLegionella pneumophilaLegionnaires' DiseasePhylogenyType II Secretion SystemsVirulence FactorsBacterial ProteinsType II Secretion SystemsVirulence FactorsAquicellaLegionellaLegionella pneumophilaLegionnaires' diseaseT2SStype II secretion

Identifiers

PMID31166887
PMCPMC6617341
OpenAlexW2948485103

What OpenQuestion holds

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LicenceCC BY
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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.