Evidence map›Paper›PMID 32620855›Full record

ArticleCommunications biology2020

Subtyping analysis reveals new variants and accelerated evolution of Clostridioides difficile toxin B.

Enhui Shen, Kangli Zhu, Danyang Li, Zhenrui Pan, Yun Luo, Qiao Bian, Liuqing He, Xiaojun Song, Ying Zhen, Dazhi Jin and 1 more

Open access · goldAbstract read
In one paragraph

Article in Communications biology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed
1.1field-weighted citation impact, top 13% 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

58 citing papers in PubMed, 81 citations in OpenAlex.

  1. Genomic and phenotypic insight intoEmerging microbes & infections · 2026
    Article
  2. Review
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  4. Clostridioides difficile pathogenesis and control.Nature reviews. Microbiology · 2026
    Review
  5. Article
  6. Article
  7. Article
  8. A single amino acid substitution determines susceptibility ofFrontiers in cellular and infection microbiology · 2026
    Article
  9. Frontiers in microbiology · 2026
    Article
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  11. HumanbioRxiv : the preprint server for biology · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. AgainstToxins · 2025
    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

11 authors at 4 institutions in 2 countries.

Enhui ShenKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.
Kangli ZhuKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.
Danyang LiKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.
Zhenrui PanKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.ORCID http://orcid.org/0000-0002-0355-5197
Yun LuoDepartment of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, 310051, China.
Qiao BianSchool of Medicine, Ningbo University, Ningbo, Zhejiang, 315211, China.
Liuqing HeKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.
Xiaojun SongCentre of Laboratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
Ying ZhenKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.
Dazhi JinCentre of Laboratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
Liang TaoKey Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China. taoliang@westlake.edu.cn.ORCID http://orcid.org/0000-0003-3441-698X
Westlake University · CNZhejiang Provincial People's Hospital · CNNingbo University · CNUNSW Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Clostridioides difficile toxins (TcdA and TcdB) are major exotoxins responsible for C. difficile infection (CDI) associated diseases. The previously reported TcdB variants showed distinct biological features, immunoactivities, and potential pathogenicity in disease progression. Here, we performed global comparisons of amino acid sequences of both TcdA and TcdB from 3,269 C. difficile genomes and clustered them according to the evolutionary relatedness. We found that TcdB was much diverse and could be divided into eight subtypes, of which four were first described. Further analysis indicates that the tcdB gene undergoes accelerated evolution to maximize diversity. By tracing TcdB subtypes back to their original isolates, we found that the distribution of TcdB subtypes was not completely aligned with the phylogeny of C. difficile. These findings suggest that the tcdB genes not only frequently mutate, but also continuously transfer and exchange among C. difficile strains.

Indexed as

Evolution, MolecularAnimalsBacterial ProteinsBacterial ToxinsClostridioides difficileClostridium InfectionsEnterotoxinsHumansMaleMiceMice, Inbred C57BLMultilocus Sequence TypingPhylogenyPolymorphism, Single NucleotideWhole Genome SequencingBacterial ProteinsBacterial ToxinsEnterotoxinstcdA protein, Clostridium difficiletoxB protein, Clostridium difficile

Identifiers

PMID32620855
PMCPMC7335066
OpenAlexW3040104294

What OpenQuestion holds

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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.