Evidence map›Paper›PMID 20729360›Full record

ArticleJournal of bacteriology2010

An extreme thermophile, Thermus thermophilus, is a polyploid bacterium.

Naoto Ohtani, Masaru Tomita, Mitsuhiro Itaya

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed
2.3field-weighted citation impact, top 12% 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

64 citing papers in PubMed, 99 citations in OpenAlex.

  1. Polyploidy: A macromutational force pushing bioeconomic developments.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  4. Development of newApplied and environmental microbiology · 2025
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  6. Complete genome sequences ofMicrobiology resource announcements · 2024
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  7. Isolation and Characterization ofInternational journal of molecular sciences · 2023
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  11. Extreme Polyploidy ofMicrobiology spectrum · 2022
    Article
  12. Genomic attributes of thermophilic and hyperthermophilic bacteria and archaea.World journal of microbiology & biotechnology · 2022
    Review
  13. Article
  14. Study of ALDH fromCells · 2021
    Article
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  20. Article

4 more citing papers are in PubMed but not listed here.

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

3 authors at 1 institution in 1 country.

Naoto OhtaniInstitute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0017, Japan. ohtani@ttck.keio.ac.jp
Masaru Tomita
Mitsuhiro Itaya
Keio University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

An extremely thermophilic bacterium, Thermus thermophilus HB8, is one of the model organisms for systems biology. Its genome consists of a chromosome (1.85 Mb), a megaplasmid (0.26 Mb) designated pTT27, and a plasmid (9.3 kb) designated pTT8, and the complete sequence is available. We show here that T. thermophilus is a polyploid organism, harboring multiple genomic copies in a cell. In the case of the HB8 strain, the copy number of the chromosome was estimated to be four or five, and the copy number of the pTT27 megaplasmid seemed to be equal to that of the chromosome. It has never been discussed whether T. thermophilus is haploid or polyploid. However, the finding that it is polyploid is not surprising, as Deinococcus radiodurans, an extremely radioresistant bacterium closely related to Thermus, is well known to be a polyploid organism. As is the case for D. radiodurans in the radiation environment, the polyploidy of T. thermophilus might allow for genomic DNA protection, maintenance, and repair at elevated growth temperatures. Polyploidy often complicates the recognition of an essential gene in T. thermophilus as a model organism for systems biology.

Indexed as

PolyploidyBase CompositionChromosomes, BacterialGenome, BacterialPlasmidsThermus thermophilus

Identifiers

PMID20729360
PMCPMC2950507
OpenAlexW2143720549

What OpenQuestion holds

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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.