Evidence map›Paper›PMID 18086214›Full record

ArticleMolecular microbiology2008

Maturation of Streptococcus pneumoniae lipoproteins by a type II signal peptidase is required for ABC transporter function and full virulence.

Suneeta Khandavilli, Karen A Homer, Jose Yuste, Shilpa Basavanna, Timothy Mitchell, Jeremy S Brown

Open access · bronzeAbstract read
In one paragraph

Article in Molecular microbiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
1.6field-weighted citation impact, top 17% 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

30 citing papers in PubMed, 62 citations in OpenAlex.

  1. Trial
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  9. SPD_0090 Negatively Contributes to Virulence ofFrontiers in microbiology · 2022
    Article
  10. Review
  11. Preclinical Development of Virulence-attenuatedAmerican journal of respiratory and critical care medicine · 2021
    Article
  12. Review
  13. Article
  14. Article
  15. Article
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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

6 authors at 3 institutions in 1 country.

Suneeta KhandavilliCentre for Respiratory Research, Department of Medicine, Royal Free and University College Medical School, Rayne Institute, London WC1E 6JJ, UK.
Karen A Homer
Jose Yuste
Shilpa Basavanna
Timothy Mitchell
Jeremy S Brown
University College London · GBKing's College London · GBUniversity of Glasgow · GB

Funding

Wellcome TrustWellcome Trust 076442
6 · The paper itself

Abstract

Cell surface lipoproteins are important for the full virulence of several bacterial pathogens, including Streptococcus pneumoniae. Processing of prolipoproteins seems to be conserved among different bacterial species, and requires type II signal peptidase (Lsp) mediated cleavage of the N-terminal signal peptide to form the mature lipoprotein. Lsp has been suggested as a target for new antibiotic therapies, but at present there are only limited data on the function of Lsp for Gram-positive bacterial pathogens. We have investigated the function and role during disease pathogenesis of the S. pneumoniae Lsp, which, blast searches suggest, is encoded by the gene Sp0928. Expression of Sp0928 protected Escherichia coli against the Lsp antagonist globomycin, and proteomics and immunoblot analysis demonstrated that deletion of Sp0928 prevented processing of S. pneumoniae prolipoproteins to mature lipoproteins. These data strongly suggest that Sp0928 encodes the S. pneumoniae Lsp. However, immunoblots of membrane-associated proteins, immunoelectron microscopy and flow cytometry assays all confirmed that in the absence of Lsp, immature lipoproteins were still attached to the cell surface. Despite preservation of lipoprotein attachment to the cell membrane, loss of S. pneumoniae Lsp resulted in several phenotypes associated with impaired lipoprotein function and reduced S. pneumoniae replication in animal models of infection.

Indexed as

AnimalsAnti-Bacterial AgentsAspartic Acid EndopeptidasesATP-Binding Cassette TransportersBacterial ProteinsColony Count, MicrobialEscherichia coliFemaleGene DeletionImmunoblottingLipoproteinsLungMicePeptidesPneumococcal InfectionsProtein Processing, Post-TranslationalAnti-Bacterial AgentsAspartic Acid EndopeptidasesATP-Binding Cassette TransportersBacterial ProteinsglobomycinLipoproteinsPeptidesProteomesignal peptidase II

Identifiers

PMID18086214
PMCPMC2228790
OpenAlexW2064265351

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.