Evidence map›Paper›PMID 26764427›Full record

ArticleGenome biology and evolution2016

Recent Mobility of Casposons, Self-Synthesizing Transposons at the Origin of the CRISPR-Cas Immunity.

Mart Krupovic, Sergey Shmakov, Kira S Makarova, Patrick Forterre, Eugene V Koonin

Open access · goldAbstract read
In one paragraph

Article in Genome biology and evolution, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.3field-weighted citation impact, top 8% 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

25 citing papers in PubMed, 39 citations in OpenAlex.

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  15. Origins and evolution of CRISPR-Cas systems.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019
    Review
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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

5 authors at 5 institutions in 3 countries.

Mart KrupovicUnité Biologie Moléculaire Du Gène Chez Les Extrêmophiles, Department of Microbiology, Institut Pasteur, Paris, France krupovic@pasteur.fr.
Sergey ShmakovNational Library of Medicine, National Center for Biotechnology Information, National Institutes of Health, Bethesda, Maryland Skolkovo Institute of Science and Technology, Skolkovo, Russia.
Kira S MakarovaNational Library of Medicine, National Center for Biotechnology Information, National Institutes of Health, Bethesda, Maryland.
Patrick ForterreUnité Biologie Moléculaire Du Gène Chez Les Extrêmophiles, Department of Microbiology, Institut Pasteur, Paris, France.
Eugene V KooninNational Library of Medicine, National Center for Biotechnology Information, National Institutes of Health, Bethesda, Maryland.
Biology of Extremophiles Laboratory · FRInstitut Pasteur · FRNational Center for Biotechnology Information · USNational Institutes of Health · USSkolkovo Institute of Science and Technology · RU

Funding

Comparative Analysis Of Completely Sequenced GenomesZIALM000073 · NLM · NATIONAL LIBRARY OF MEDICINE · PI KOONIN, EUGENE V · 2009 to 2025
$43.1M
European Research Council 340440Intramural NIH HHS
6 · The paper itself

Abstract

Casposons are a superfamily of putative self-synthesizing transposable elements that are predicted to employ a homolog of Cas1 protein as a recombinase and could have contributed to the origin of the CRISPR-Cas adaptive immunity systems in archaea and bacteria. Casposons remain uncharacterized experimentally, except for the recent demonstration of the integrase activity of the Cas1 homolog, and given their relative rarity in archaea and bacteria, original comparative genomic analysis has not provided direct indications of their mobility. Here, we report evidence of casposon mobility obtained by comparison of the genomes of 62 strains of the archaeon Methanosarcina mazei. In these genomes, casposons are variably inserted in three distinct sites indicative of multiple, recent gains, and losses. Some casposons are inserted into other mobile genetic elements that might provide vehicles for horizontal transfer of the casposons. Additionally, many M. mazei genomes contain previously undetected solo terminal inverted repeats that apparently are derived from casposons and could resemble intermediates in CRISPR evolution. We further demonstrate the sequence specificity of casposon insertion and note clear parallels with the adaptation mechanism of CRISPR-Cas. Finally, besides identifying additional representatives in each of the three originally defined families, we describe a new, fourth, family of casposons.

Indexed as

Clustered Regularly Interspaced Short Palindromic RepeatsGene Transfer, HorizontalArchaeal ProteinsBase SequenceDNA Transposable ElementsEndodeoxyribonucleasesGenome, ArchaealMethanosarcina barkeriMolecular Sequence DataPhylogenyArchaeal ProteinsDNA Transposable ElementsEndodeoxyribonucleasescasposonsCRISPR-Casmobile genetic elementsself-synthesizing transposonstransposition

Identifiers

PMID26764427
PMCPMC4779613
OpenAlexW2268835452

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.