Evidence map›Paper›PMID 21767809›Full record

ArticleCell host & microbe2011

The Chlamydia protease CPAF regulates host and bacterial proteins to maintain pathogen vacuole integrity and promote virulence.

Ine Jorgensen, Maria M Bednar, Vishar Amin, Beckley K Davis, Jenny P Y Ting, Dewey G McCafferty, Raphael H Valdivia

Open access · bronzeAbstract read
In one paragraph

Article in Cell host & microbe, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed
7.3field-weighted citation impact, top 2% 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

59 citing papers in PubMed, 86 citations in OpenAlex.

  1. RNF213-dependent lytic destruction ofProceedings of the National Academy of Sciences of the United States of America · 2026
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  10. Pathogenic and Protective Roles of Neutrophils inPathogens (Basel, Switzerland) · 2025
    Review
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  12. Microorganisms · 2023
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  13. Microorganisms · 2023
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  16. Microorganisms · 2019
    Review
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  18. Clear Victory forFrontiers in microbiology · 2019
    Review
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  20. mSphere · 2018
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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 1 country.

Ine JorgensenDepartment of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27710, USA.
Maria M Bednar
Vishar Amin
Beckley K Davis
Jenny P Y Ting
Dewey G McCafferty
Raphael H Valdivia
Duke University · USUniversity of North Carolina at Chapel Hill · US

Funding

Yessinia autotransporters (Yaps): Structure, function, and host responseU54AI057157 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI CROWE, JAMES E · 2003 to 2013
$91.4M
BIO-ORGANIC MECHANISMS OF PEPTIDE ANTIBIOTICSR01AI046611 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI MCCAFFERTY, DEWEY G · 2000 to 2009
$2.7M
Chlamydia Effector ProteinsR01AI081694 · NIAID · DUKE UNIVERSITY · PI VALDIVIA, RAPHAEL H · 2010 to 2014
$1.9M
Enzymology of Chlamydial PathogenesisR01AI107951 · NIAID · DUKE UNIVERSITY · PI MCCAFFERTY, DEWEY G, VALDIVIA, RAPHAEL H · 2014 to 2018
$1.9M
Chlamydia co-option of Eukaryotic Lipid DropletsR01AI068032 · NIAID · DUKE UNIVERSITY · PI VALDIVIA, RAPHAEL H · 2006 to 2010
$1.8M
Enzymology of Chlamydia PathogenesisR56AI107951 · NIAID · DUKE UNIVERSITY · PI MCCAFFERTY, DEWEY G · 2013 to 2013
$282k
NIAID NIH HHS AI081694NIAID NIH HHS AI46611NIAID NIH HHS R01 AI046611NIAID NIH HHS R01 AI068032NIAID NIH HHS R01 AI081694NIAID NIH HHS R01 AI107951NIAID NIH HHS R56 AI107951NIAID NIH HHS U54 AI057157Wellcome Trust
6 · The paper itself

Abstract

The obligate intracellular bacterial pathogen Chlamydia trachomatis injects numerous effector proteins into the epithelial cell cytoplasm to manipulate host functions important for bacterial survival. In addition, the bacterium secretes a serine protease, chlamydial protease-like activity factor (CPAF). Although several CPAF targets are reported, the significance of CPAF-mediated proteolysis is unclear due to the lack of specific CPAF inhibitors and the diversity of host targets. We report that CPAF also targets chlamydial effectors secreted early during the establishment of the pathogen-containing vacuole ("inclusion"). We designed a cell-permeable CPAF-specific inhibitory peptide and used it to determine that CPAF prevents superinfection by degrading early Chlamydia effectors translocated during entry into a preinfected cell. Prolonged CPAF inhibition leads to loss of inclusion integrity and caspase-1-dependent death of infected epithelial cells. Thus, CPAF functions in niche protection, inclusion integrity and pathogen survival, making the development of CPAF-specific protease inhibitors an attractive antichlamydial therapeutic strategy.

Indexed as

Host-Pathogen InteractionsAmino Acid Chloromethyl KetonesAmino Acid SequenceAnimalsAntigens, BacterialBacterial ProteinsBacterial Secretion SystemsCaspase 1Cell DeathCell Membrane PermeabilityChlamydia trachomatisEndopeptidasesEpithelial CellsMiceMolecular Sequence DataPeptidesAmino Acid Chloromethyl KetonesAntigens, BacterialBacterial ProteinsBacterial Secretion SystemsCaspase 1CPA factorCT694 protein, Chlamydia trachomatisEndopeptidasesN-acetyl-tyrosyl-valyl-alanyl-aspartyl chloromethyl ketonePeptidesProtease InhibitorsVirulence Factors

Identifiers

PMID21767809
PMCPMC3147293
OpenAlexW2134924597

What OpenQuestion holds

Textmetadata
LicenceTDM
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.