Evidence map›Paper›PMID 34903649›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Discovery of an ancient MHC category with both class I and class II features.

Kazuhiko Okamura, Johannes M Dijkstra, Kentaro Tsukamoto, Unni Grimholt, Geert F Wiegertjes, Akiko Kondow, Hisateru Yamaguchi, Keiichiro Hashimoto

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
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

15 citing papers in PubMed.

  1. Review
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  7. Review
  8. Cancer immunotherapy by γδ T cells.Science (New York, N.Y.) · 2024
    Review
  9. Review
  10. Article
  11. Universal open MHC-I molecules for rapid peptide loading and enhanced complex stability across HLA allotypes.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  12. Article
  13. Review
  14. Article
  15. The new W family reconstructs the evolution of MHC genes.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors.

Kazuhiko OkamuraFaculty of Clinical Engineering, School of Health Sciences, Fujita Health University, Toyoake 470-1192, Japan.
Johannes M DijkstraInstitute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan.ORCID 0000-0001-7097-3826
Kentaro TsukamotoLaboratory for Proteins and Genes, Center for Joint Research Facilities Support, Fujita Health University, Toyoake 470-1192, Japan.ORCID 0000-0003-0544-9811
Unni GrimholtFish Health Research Group, Norwegian Veterinary Institute 1433 Aas, Norway.ORCID 0000-0002-0202-8061
Geert F WiegertjesAquaculture and Fisheries Group, Department of Animal Sciences, Wageningen University and Research, 6700 AH Wageningen, The Netherlands.
Akiko KondowAdvanced Comprehensive Research Organization, Teikyo University, Tokyo 173-0003, Japan.ORCID 0000-0001-5342-1237
Hisateru YamaguchiDepartment of Medical Technology, School of Nursing and Medical Care, Yokkaichi Nursing and Medical Care University, Yokkaichi 512-8045, Japan.ORCID 0000-0002-4507-9598
Keiichiro HashimotoEmeritus Professor of Department of Biomedical Polymer Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan keihashi@fujita-hu.ac.jp.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Two classes of major histocompatibility complex (MHC) molecules, MHC class I and class II, play important roles in our immune system, presenting antigens to functionally distinct T lymphocyte populations. However, the origin of this essential MHC class divergence is poorly understood. Here, we discovered a category of MHC molecules (W-category) in the most primitive jawed vertebrates, cartilaginous fish, and also in bony fish and tetrapods. W-category, surprisingly, possesses class II-type α- and β-chain organization together with class I-specific sequence motifs for interdomain binding, and the W-category α2 domain shows unprecedented, phylogenetic similarity with β

Indexed as

Amino Acid SequenceAnimalsCluster AnalysisEvolution, MolecularFishesHistocompatibility AntigensHistocompatibility Antigens Class IHistocompatibility Antigens Class IIHumansMajor Histocompatibility ComplexMultigene FamilyPhylogenyProtein DomainsProtein MultimerizationVertebratesHistocompatibility AntigensHistocompatibility Antigens Class IHistocompatibility Antigens Class IImajor histocompatibility complexMHC class divergenceMHC class IMHC class IImolecular evolution

Identifiers

PMID34903649
PMCPMC8713811

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Registered trials

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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.