Evidence map›Paper›PMID 10531273›Full record

ArticleInfection and immunity1999

Identification and molecular analysis of the gene encoding Rickettsia typhi hemolysin.

S Radulovic, J M Troyer, M S Beier, A O Lau, A F Azad

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
1.3field-weighted citation impact, top 22% 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

32 citing papers in PubMed, 55 citations in OpenAlex.

  1. TlyC, a conserved hemolysin inMicrobiology spectrum · 2025
    Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. Review
  7. Article
  8. Subversion of host cell signaling: The arsenal of Rickettsial species.Frontiers in cellular and infection microbiology · 2022
    Review
  9. Mediterranean Spotted Fever: Current Knowledge and Recent Advances.Tropical medicine and infectious disease · 2021
    Review
  10. Pathogens (Basel, Switzerland) · 2021
    Article
  11. Review
  12. Article
  13. Review
  14. Draft genome ofPeerJ · 2020
    Article
  15. Review
  16. Article
  17. Antibodies againstInfection and immunity · 2017
    Article
  18. Article
  19. Secretome of obligate intracellular Rickettsia.FEMS microbiology reviews · 2015
    Review
  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

5 authors at 1 institution in 1 country.

S RadulovicDepartment of Microbiology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA. sradu001@maryland.edu
J M Troyer
M S Beier
A O Lau
A F Azad
University of Maryland, Baltimore · US

Funding

Murine Typhus: Vector Biology &TransmissionR37AI017828 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI AZAD, ABDU F · 1998 to 2007
$3.6M
INTERSPECIFIC COMPETITION BETWEEN RICKETTSIAE IN TICKSR01AI043006 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI AZAD, ABDU F · 1998 to 2014
$3.3M
BORDETELLA VIRULENCE REGULON IN VITRO AND IN VIVOR01AI038417 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MILLER, JEFFERY F. · 1995 to 2005
$1.6M
NIAID NIH HHS AI38417NIAID NIH HHS R01 AI043006NIAID NIH HHS R37 AI017828
6 · The paper itself

Abstract

Rickettsia typhi, the causative agent of murine typhus, grows directly within the host cell cytoplasm, accumulating a large number of progeny, and eventually lyses the cells. Typhus group rickettsiae (R. typhi and R. prowazekii) adhere to and lyse human and sheep erythrocytes. However, the molecular mechanism underlying erythrocyte lysis by R. typhi has not been defined. Here we describe the cloning and nucleotide sequence analysis of the gene (tlyC) encoding a hemolysin from R. typhi. DNA sequence analysis of R. typhi tlyC revealed an open reading frame of 912 bp, which encodes a protein of 304 amino acids with a predicted molecular mass of 38 kDa. To associate the R. typhi tlyC gene product with hemolytic activity, we performed complementation studies with hemolysin-negative Proteus mirabilis WPM111 (a HpmA(-) mutant of BA6163) transformed with R. typhi tlyC or R. typhi GFPuv-tlyC constructs. We demonstrated that the cloned tlyC gene conferred a hemolytic phenotype on an otherwise nonhemolytic mutant of P. mirabilis. The availability of the cloned R. typhi tlyC will permit further characterization and definition of its role in rickettsial virulence.

Indexed as

Bacterial ProteinsGenes, BacterialAmino Acid SequenceAnimalsChlorocebus aethiopsCloning, MolecularHemolysin ProteinsMolecular Sequence DataPolymerase Chain ReactionRickettsia typhiSheepTransformation, BacterialVero CellsBacterial ProteinsHemolysin ProteinsTlyC protein, Brachyspira hyodysenteriae

Identifiers

PMID10531273
PMCPMC96999
OpenAlexW2129628429

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.