Evidence map›Paper›PMID 21873199›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Minimization of the Legionella pneumophila genome reveals chromosomal regions involved in host range expansion.

Tamara J O'Connor, Yewande Adepoju, Dana Boyd, Ralph R Isberg

Erratum issuedAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. 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 126 papers.

0numbers the graph read from it
0cells of the map it votes in
126citing 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

126 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Molecular evolution and adaptations ofFrontiers in cellular and infection microbiology · 2026
    Review
  5. Systematic Discovery of Novel Phosphoinositide-Binding Effectors inbioRxiv : the preprint server for biology · 2025
    Article
  6. Article
  7. Article
  8. The discovery of aScience advances · 2025
    Article
  9. Phosphatidic acid production on the vacuole harboringProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. ThemSphere · 2025
    Article
  15. Article
  16. Journal of bacteriology · 2024
    Review
  17. Article
  18. Article
  19. Article
  20. Review

66 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

4 authors.

Tamara J O'ConnorHoward Hughes Medical Institute and Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111, USA.
Yewande Adepoju
Dana Boyd
Ralph R Isberg

Funding

Tufts Post-Baccalaureate Research Education ProgramR25GM066567 · NIGMS · TUFTS UNIVERSITY BOSTON · PI RIOS, MARIBEL · 2002 to 2024
$5.7M
Howard Hughes Medical InstituteNIGMS NIH HHS R25 GM066567
6 · The paper itself

Abstract

Legionella pneumophila is a bacterial pathogen of amoebae and humans. Intracellular growth requires a type IVB secretion system that translocates at least 200 different proteins into host cells. To distinguish between proteins necessary for growth in culture and those specifically required for intracellular replication, a screen was performed to identify genes necessary for optimal growth in nutrient-rich medium. Mapping of these genes revealed that the L. pneumophila chromosome has a modular architecture consisting of several large genomic islands that are dispensable for growth in bacteriological culture. Strains lacking six of these regions, and thus 18.5% of the genome, were viable but required secondary point mutations for optimal growth. The simultaneous deletion of five of these genomic loci had no adverse effect on growth of the bacterium in nutrient-rich media. Remarkably, this minimal genome strain, which lacked 31% of the known substrates of the type IVB system, caused only marginal defects in intracellular growth within mouse macrophages. In contrast, deletion of single regions reduced growth within amoebae. The importance of individual islands, however, differed among amoebal species. The host-specific requirements of these genomic islands support a model in which the acquisition of foreign DNA has broadened the L. pneumophila host range.

Indexed as

Models, BiologicalAmoebaAnimalsCells, CulturedChromosome MappingChromosomes, BacterialGenome, BacterialGenomic IslandsHost-Pathogen InteractionsLegionella pneumophilaMacrophagesMice

Identifiers

PMID21873199
PMCPMC3169125

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.