Evidence map›Paper›PMID 9119448›Full record

ArticleInfection and immunity1997

Molecular characterization of pldA, the structural gene for a phospholipase A from Campylobacter coli, and its contribution to cell-associated hemolysis.

K A Grant, I U Belandia, N Dekker, P T Richardson, S F Park

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
11.0field-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

33 citing papers in PubMed, 103 citations in OpenAlex.

  1. Article
  2. Article
  3. Identification of Campylobacter fetus subsp. venerealis virulence genes in cervical mucus from cows.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2019
    Article
  4. Heme Uptake and Utilization by Gram-Negative Bacterial Pathogens.Frontiers in cellular and infection microbiology · 2019
    Review
  5. Article
  6. Differential Survival of Hyper-AerotolerantFrontiers in microbiology · 2017
    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

5 authors at 1 institution in 2 countries.

K A GrantInstitute of Food Research, Reading Laboratory, United Kingdom.
I U Belandia
N Dekker
P T Richardson
S F Park
Food Research Institute · SK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A gene (pldA) encoding a 35.0-kDa protein with significant homology to the Escherichia coli outer membrane phospholipase was identified upstream of an operon encoding an enterochelin transport system in Campylobacter coli. The results of this study suggest that this gene encodes an outer membrane phospholipase A in C. coli. First, expression of the pldA gene product in a PldA-deficient mutant of E. coli led to the restoration of phospholipase A activity. The recombinant product also partitioned to the outer membrane, suggesting that it may be similarly located in C. coli. Second, heterologous overexpression in E. coli, followed by in vitro folding and purification of C. coli PldA, resulted in pure protein which displayed calcium-dependent lysophospholipase and phospholipase A activities in vitro. Finally, mutants of C. coli in which the pldA gene had been inactivated by allelic exchange were deficient in phospholipase A activity. Phospholipases are associated with lysis of erythrocytes by a number of bacterial pathogens. The pldA mutant was shown to have a reduced hemolytic activity compared to the wild-type strain, suggesting a role for the phospholipase A in the lysis of erythrocytes by C. coli. Since hemolysins are intimately associated with the disease-causing potential of a number of bacterial pathogens, it is likely that the phospholipase A plays some role in Campylobacter virulence.

Indexed as

Genes, BacterialAmino Acid SequenceBase SequenceCampylobacter coliCloning, MolecularHemolysisMolecular Sequence DataMutationPhospholipases ASequence AlignmentPhospholipases A

Identifiers

PMID9119448
PMCPMC175114
OpenAlexW2113168142

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.