Evidence map›Paper›PMID 12453305›Full record

ArticleBMC microbiology2002

The expression, processing and localization of polymorphic membrane proteins in Chlamydia pneumoniae strain CWL029.

Brian Berg Vandahl, Anna Sofie Pedersen, Kris Gevaert, Arne Holm, Joël Vandekerckhove, Gunna Christiansen, Svend Birkelund

Open access · goldAbstract read
In one paragraph

Article in BMC microbiology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.0field-weighted citation impact, top 8% 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

25 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
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  5. Chlamydial Infection From Outside to Inside.Frontiers in microbiology · 2019
    Review
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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

7 authors at 2 institutions in 2 countries.

Brian Berg VandahlDepartment of Medical Microbiology and Immunology, University of Aarhus, Denmark. vandahl@medmicro.au.dk
Anna Sofie Pedersen
Kris Gevaert
Arne Holm
Joël Vandekerckhove
Gunna Christiansen
Svend Birkelund
Aarhus University · DKVlaams Instituut voor Biotechnologie · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundChlamydiae are obligate intracellular bacteria, which are important human pathogens. Genome sequences of C. trachomatis and C. pneumoniae have revealed the presence of a Chlamydia specific gene family encoding polymorphic outer membrane proteins, Pmps. In C. pneumoniae the family comprises twenty-one members, which are all transcribed. In the present study, the expression, processing and localisation of the sixteen full-length Pmps in C. pneumoniae strain CWL029 have been further investigated by two-dimensional gel electrophoresis and immunofluorescence microscopy.

resultsTen Pmps were identified in elementary bodies (EBs). Eight of these were investigated with respect to time dependent expression and all were found to be up-regulated between 36 and 48 hours post infection. Antibodies against Pmp6, 8, 10, 11 and 21 reacted with chlamydiae when infected cells were formalin fixed. Pmp6, Pmp20 and Pmp21 were found in cleaved forms, and the cleavage sites of Pmp6 and Pmp21 were identified.

conclusionsThe Pmps are heavily up-regulated at the time of conversion of RB to EB, and at least ten Pmps are present in EBs. Due to their reaction in formalin fixation it is likely that Pmp6, 8, 10, 11 and 21 are surface exposed. The identified cleavage sites of Pmp6 and Pmp21 are in agreement with the theory that the Pmps are autotransporters.

Indexed as

Bacterial Outer Membrane ProteinsBacterial ProteinsChlamydophila pneumoniaeDNA, BacterialElectrophoresis, Polyacrylamide GelGene Expression Regulation, BacterialHumansMass SpectrometryMicroscopy, FluorescencePolymerase Chain ReactionSequence Analysis, ProteinTumor Cells, CulturedBacterial Outer Membrane ProteinsBacterial ProteinsDNA, Bacterial

Identifiers

PMID12453305
PMCPMC140015
OpenAlexW2151992798

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.