Evidence map›Paper›PMID 19769366›Full record

ArticleBiochemistry2009

Biophysical characterization of Chlamydia trachomatis CT584 supports its potential role as a type III secretion needle tip protein.

Aaron P Markham, Zane A Jaafar, Kyle E Kemege, C Russell Middaugh, P Scott Hefty

Abstract read
In one paragraph

Article in Biochemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

21 citing papers in PubMed.

  1. Article
  2. Article
  3. Type III Secretion inMicrobiology and molecular biology reviews : MMBR · 2023
    Review
  4. Article
  5. Robust Heat Shock Response inFrontiers in microbiology · 2021
    Article
  6. Review
  7. Article
  8. Conserved type III secretion system exerts important roles in Chlamydia trachomatis.International journal of clinical and experimental pathology · 2014
    Review
  9. Review
  10. Modulation of host signaling and cellular responses by Chlamydia.Cell communication and signaling : CCS · 2013
    Review
  11. Structure of CT584 from Chlamydia trachomatis refined to 3.05 Å resolution.Acta crystallographica. Section F, Structural biology and crystallization communications · 2013
    Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
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

5 authors.

Aaron P MarkhamDepartment of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047, USA.
Zane A Jaafar
Kyle E Kemege
C Russell Middaugh
P Scott Hefty

Funding

Regulation of Virulence Gene Expression in ChlamydiaR01AI079083 · NIAID · UNIVERSITY OF KANSAS LAWRENCE · PI HEFTY, P SCOTT · 2010 to 2014
$1.8M
NIAID NIH HHS R01 AI079083
6 · The paper itself

Abstract

Chlamydia are obligate intracellular bacterial pathogens that cause a variety of diseases. Like many Gram-negative bacteria, they employ type III secretion systems (T3SS) for invasion, establishing and maintaining their unique intracellular niche, and possibly cellular exit. Computational structure prediction indicated that ORF CT584 is homologous to other T3SS needle tip proteins. Tip proteins have been shown to be localized to the extracellular end of the T3SS needle and play a key role in controlling secretion of effector proteins. We have previously demonstrated that T3SS needle tip proteins from different bacteria share many biophysical characteristics. To support the hypothesis that CT584 is a T3SS needle tip protein, biophysical properties of CT584 were explored as a function of pH and temperature, using spectroscopic techniques. Far-UV circular dichroism, Fourier transform infrared spectroscopy, UV absorbance spectroscopy, ANS extrinsic fluorescence, turbidity, right angle static light scattering, and analytical ultracentrifugation were all employed to monitor the secondary, tertiary, quaternary, and aggregation behavior of this protein. An empirical phase diagram approach is also employed to facilitate such comparisons. These analyses demonstrate that CT584 shares many biophysical characteristics with other T3SS needle tip proteins. These data support the hypothesis that CT584 is a member of the same functional family, although future biologic analyses are required.

Indexed as

Bacterial ProteinsChlamydia trachomatisCircular DichroismHydrogen-Ion ConcentrationProtein ConformationSpectrometry, FluorescenceSpectrophotometry, UltravioletSpectroscopy, Fourier Transform InfraredUltracentrifugationBacterial Proteins

Identifiers

PMID19769366
PMCPMC4285778

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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.