Evidence map›Paper›PMID 23475617›Full record

ArticleApplied and environmental microbiology2013

Characterization of Helicobacter pylori bacteriophage KHP30.

Jumpei Uchiyama, Hiroaki Takeuchi, Shin-ichiro Kato, Keiji Gamoh, Iyo Takemura-Uchiyama, Takako Ujihara, Masanori Daibata, Shigenobu Matsuzaki

Open access · bronzeAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
5.8field-weighted citation impact, top 4% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 citations in OpenAlex.

  1. Worldwide research trends on theFrontiers in immunology · 2026
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  3. New Insights into CRISPR-like Arrays inPathogens (Basel, Switzerland) · 2026
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  7. Opportunities forMicroorganisms · 2024
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  9. Characterization and Genomic Analysis of a New Phage InfectingInternational journal of molecular sciences · 2022
    Article
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  11. Article
  12. Article
  13. Article
  14. Bacteriophages ofFrontiers in microbiology · 2020
    Review
  15. Article
  16. Review
  17. Relating Phage Genomes toInternational journal of molecular sciences · 2018
    Review
  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

8 authors at 1 institution in 1 country.

Jumpei UchiyamaDepartment of Microbiology and Infection, Kochi University, Kochi, Japan.
Hiroaki Takeuchi
Shin-ichiro Kato
Keiji Gamoh
Iyo Takemura-Uchiyama
Takako Ujihara
Masanori Daibata
Shigenobu Matsuzaki
Kōchi University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Helicobacter pylori inhabits the stomach mucosa and is a causative agent of stomach ulcer and cancer. In general, bacteriophages (phages) are strongly associated with bacterial evolution, including the development of pathogenicity. Several tailed phages have so far been reported in H. pylori. We have isolated an H. pylori phage, KHP30, and reported its genomic sequence. In this study, we examined the biological characteristics of phage KHP30. Phage KHP30 was found to be a spherical lipid-containing phage with a diameter of ca. 69 nm. Interestingly, it was stable from pH 2.5 to pH 10, suggesting that it is adapted to the highly acidic environment of the human stomach. Phage KHP30 multiplied on 63.6% of clinical H. pylori isolates. The latent period was ca. 140 min, shorter than the doubling time of H. pylori (ca. 180 min). The burst size was ca. 13, which was smaller than the burst sizes of other known tailed or spherical phages. Phage KHP30 seemed to be maintained as an episome in H. pylori strain NY43 cells, despite a predicted integrase gene in the KHP30 genomic sequence. Seven possible virion proteins of phage KHP30 were analyzed using N-terminal protein sequencing and mass spectrometry, and their genes were found to be located on its genomic DNA. The genomic organization of phage KHP30 differed from the genomic organizations in the known spherical phage families Corticoviridae and Tectiviridae. This evidence suggests that phage KHP30 is a new type of spherical phage that cannot be classified in any existing virus category.

Indexed as

Genome, ViralAmino Acid SequenceBacteriophagesDNA, ViralHelicobacter pyloriHydrogen-Ion ConcentrationMicroscopy, Electron, TransmissionMolecular Sequence DataOpen Reading FramesPlasmidsViral Plaque AssayViral ProteinsVirus LatencyDNA, ViralViral Proteins

Identifiers

PMID23475617
PMCPMC3685256
OpenAlexW2037726252

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.