Evidence map›Paper›PMID 34730808›Full record

ArticleMolecular biology and evolution2022

Citrullination Was Introduced into Animals by Horizontal Gene Transfer from Cyanobacteria.

Thomas F M Cummings, Kevin Gori, Luis Sanchez-Pulido, Gavriil Gavriilidis, David Moi, Abigail R Wilson, Elizabeth Murchison, Christophe Dessimoz, Chris P Ponting, Maria A Christophorou

Open access · goldAbstract read
In one paragraph

Article in Molecular biology and evolution, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.1field-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

23 citing papers in PubMed, 28 citations in OpenAlex.

  1. Article
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  12. Neutrophil attachment via Mac-1 (Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Article
  13. Co-expression of PADI isoforms during progenitor differentiation enables functional diversity.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Article
  14. The fitness cost of spurious phosphorylation.bioRxiv : the preprint server for biology · 2023
    Article
  15. Article
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  17. Review
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  19. Article
  20. The virtues and vices of protein citrullination.Royal Society open science · 2022
    Review
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

10 authors at 3 institutions in 2 countries.

Thomas F M CummingsMRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom.ORCID 0000-0001-5214-9796
Kevin GoriTransmissible Cancer Group, Department of Veterinary Medicine, Cambridge, United Kingdom.
Luis Sanchez-PulidoMRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom.
Gavriil GavriilidisMRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom.
David MoiDepartment of Computational Biology, University of Lausanne, Lausanne, Switzerland.
Abigail R WilsonMRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom.
Elizabeth MurchisonTransmissible Cancer Group, Department of Veterinary Medicine, Cambridge, United Kingdom.
Christophe DessimozDepartment of Computational Biology, University of Lausanne, Lausanne, Switzerland.
Chris P PontingMRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom.ORCID 0000-0003-0202-7816
Maria A ChristophorouMRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom.ORCID 0000-0001-5455-7283
Western General Hospital · GBSIB Swiss Institute of Bioinformatics · CHBabraham Institute · GB

Funding

Medical Research Council MC_UU_00007/15Medical Research Council MC_UU_12008/1Wellcome TrustWellcome Trust 105642/A/14/Z
6 · The paper itself

Abstract

Protein posttranslational modifications add great sophistication to biological systems. Citrullination, a key regulatory mechanism in human physiology and pathophysiology, is enigmatic from an evolutionary perspective. Although the citrullinating enzymes peptidylarginine deiminases (PADIs) are ubiquitous across vertebrates, they are absent from yeast, worms, and flies. Based on this distribution PADIs were proposed to have been horizontally transferred, but this has been contested. Here, we map the evolutionary trajectory of PADIs into the animal lineage. We present strong phylogenetic support for a clade encompassing animal and cyanobacterial PADIs that excludes fungal and other bacterial homologs. The animal and cyanobacterial PADI proteins share functionally relevant primary and tertiary synapomorphic sequences that are distinct from a second PADI type present in fungi and actinobacteria. Molecular clock calculations and sequence divergence analyses using the fossil record estimate the last common ancestor of the cyanobacterial and animal PADIs to be less than 1 billion years old. Additionally, under an assumption of vertical descent, PADI sequence change during this evolutionary time frame is anachronistically low, even when compared with products of likely endosymbiont gene transfer, mitochondrial proteins, and some of the most highly conserved sequences in life. The consilience of evidence indicates that PADIs were introduced from cyanobacteria into animals by horizontal gene transfer (HGT). The ancestral cyanobacterial PADI is enzymatically active and can citrullinate eukaryotic proteins, suggesting that the PADI HGT event introduced a new catalytic capability into the regulatory repertoire of animals. This study reveals the unusual evolution of a pleiotropic protein modification.

Indexed as

CyanobacteriaGene Transfer, HorizontalAnimalsCitrullinationConserved SequenceEvolution, MolecularPhylogenycitrullinationenzymehorizontal gene transferposttranslational modification

Identifiers

PMID34730808
PMCPMC8826395
OpenAlexW3210363085

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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.