Evidence map›Paper›PMID 16926407›Full record

ArticleInfection and immunity2006

Legionella pneumophila Mip, a surface-exposed peptidylproline cis-trans-isomerase, promotes the presence of phospholipase C-like activity in culture supernatants.

Sruti Debroy, Virginia Aragon, Sherry Kurtz, Nicholas P Cianciotto

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
2.4field-weighted citation impact, top 13% 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

27 citing papers in PubMed, 43 citations in OpenAlex.

  1. Molecular evolution and adaptations ofFrontiers in cellular and infection microbiology · 2026
    Review
  2. Protein sociology of ProA, Mip and other secreted virulence factors at theFrontiers in cellular and infection microbiology · 2023
    Review
  3. Article
  4. Review
  5. Structural characterization of PaFkbA: A periplasmic chaperone fromComputational and structural biotechnology journal · 2021
    Article
  6. Article
  7. Peptidyl-Prolyl-Infection and immunity · 2019
    Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Review
  19. Article
  20. Review
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 1 institution in 1 country.

Sruti DebroyDepartment of Microbiology-Immunology, Northwestern University Medical School, 320 East Superior Street, Chicago, IL 60611-3010, USA.
Virginia Aragon
Sherry Kurtz
Nicholas P Cianciotto
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 AI 43987NIAID NIH HHS R01 AI043987
6 · The paper itself

Abstract

The type II secretion system of Legionella pneumophila promotes pathogenesis. Among the Legionella type II-dependent exoenzymes is a p-nitrophenol phosphorylcholine (p-NPPC) hydrolase whose activity is only partially explained by the PlcA phospholipase C. In a screen to identify other factors that promote secreted hydrolase activity, we isolated a mip mutant. L. pneumophila Mip is a surface-exposed, FK506-binding protein that is needed for optimal infection and has peptidylproline cis-trans-isomerase (PPIase) activity. Since the molecular target of Mip was undefined, we investigated a possible relationship between Mip and the secreted p-NPPC hydrolase activity. In the mip mutant there was a 40 to 70% reduction in secreted activity that was successfully complemented by providing mip on a plasmid. A similar phenotype was observed when we examined four other independently derived mip mutants, and in all cases the defect was complemented by reintroduction of mip. Thus, mip promotes the presence of a p-NPPC hydrolase activity in culture supernatants. We also found that the C terminus of Mip is required for this effect. When supernatants were examined by anion-exchange chromatography, the p-NPPC hydrolase activity associated with Mip proved to be type II dependent but distinct from PlcA. This conclusion was supported by the phenotype of a newly constructed mip plcA double mutant. Thus, Mip promotes the elaboration of a new type II exoprotein. These data provide both the first evidence for a target for Mip and the first indication that a surface PPIase is involved in the secretion or activation of proteins beyond the outer membrane.

Indexed as

Bacterial ProteinsImmunophilinsLegionella pneumophilaMembrane ProteinsMutationPeptidylprolyl IsomerasePhosphoric Diester HydrolasesProtein TransportType C Phospholipases4-nitrophenylphosphorylcholine phosphodiesteraseBacterial ProteinsImmunophilinsMembrane ProteinsMip protein, Legionella pneumophilaPeptidylprolyl IsomerasePhosphoric Diester HydrolasesType C Phospholipases

Identifiers

PMID16926407
PMCPMC1594821
OpenAlexW2023427568

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.