Evidence map›Paper›PMID 34145278›Full record

ArticleNature communications2021

Live-cell imaging of circadian clock protein dynamics in CRISPR-generated knock-in cells.

Christian H Gabriel, Marta Del Olmo, Amin Zehtabian, Marten Jäger, Silke Reischl, Hannah van Dijk, Carolin Ulbricht, Asylkhan Rakhymzhan, Thomas Korte, Barbara Koller and 9 more

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
5.3field-weighted citation impact, top 3% 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

46 citing papers in PubMed, 71 citations in OpenAlex.

  1. Review
  2. Review
  3. Article
  4. Article
  5. Article
  6. The CLOCK-BMAL1 complex in circadian regulation: structure, mechanisms, and therapeutic targeting.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2026
    Review
  7. Article
  8. Review
  9. Review
  10. Review
  11. Review
  12. Circadian clock and cancer.Military Medical Research · 2026
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Development of compounds for targeted degradation of mammalian cryptochrome proteins.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  19. Natural Compounds that Modulate Circadian Rhythms.Current topics in medicinal chemistry · 2025
    Review
  20. Circadian Effects of Melatonin Receptor-Targeting Molecules In Vitro.International journal of molecular sciences · 2024
    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

19 authors at 5 institutions in 1 country.

Christian H GabrielCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany.ORCID http://orcid.org/0000-0003-2081-1743
Marta Del OlmoInstitute for Theoretical Biology, Charité Universitätsmedizin Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0001-6530-4628
Amin ZehtabianInstitute for Chemistry and Biochemistry, Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0002-0718-4442
Marten JägerBerlin Institute of Health (BIH) Core Genomics Facility, Charité Universitätsmedizin Berlin, Berlin, Germany.
Silke ReischlCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany.ORCID http://orcid.org/0000-0003-4822-4137
Hannah van DijkCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany.ORCID http://orcid.org/0000-0002-9712-8371
Carolin UlbrichtImmune Dynamics, Rheumatology and Clinical Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0003-2983-6242
Asylkhan RakhymzhanBiophysical Analytics, Deutsches Rheuma-Forschungszentrum (DRFZ), a Leibniz Institute, Berlin, Germany.ORCID http://orcid.org/0000-0003-3152-1557
Thomas KorteMolecular Biophysics, Department of Biology, Humboldt Universität zu Berlin, Berlin, Germany.
Barbara KollerCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany.
Astrid GrudzieckiCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany.
Bert MaierCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany.
Andreas HerrmannMolecular Biophysics, Department of Biology, Humboldt Universität zu Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0002-6716-2026
Raluca NiesnerBiophysical Analytics, Deutsches Rheuma-Forschungszentrum (DRFZ), a Leibniz Institute, Berlin, Germany.ORCID http://orcid.org/0000-0001-8969-5432
Tomasz ZemojtelBerlin Institute of Health (BIH) Core Genomics Facility, Charité Universitätsmedizin Berlin, Berlin, Germany.
Helge EwersInstitute for Chemistry and Biochemistry, Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0003-3948-4332
Adrián E GranadaCharité Comprehensive Cancer Center, Charité Universitätsmedizin Berlin, Berlin, Germany.ORCID http://orcid.org/0000-0003-0537-9091
Hanspeter HerzelInstitute for Theoretical Biology, Charité Universitätsmedizin Berlin, Berlin, Germany.
Achim KramerCharité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany. achim.kramer@charite.de.ORCID http://orcid.org/0000-0001-9671-6078
Humboldt-Universität zu Berlin · DECharité - Universitätsmedizin Berlin · DEBerlin Institute of Health at Charité - Universitätsmedizin Berlin · DEFreie Universität Berlin · DELeibniz Association · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The cell biology of circadian clocks is still in its infancy. Here, we describe an efficient strategy for generating knock-in reporter cell lines using CRISPR technology that is particularly useful for genes expressed transiently or at low levels, such as those coding for circadian clock proteins. We generated single and double knock-in cells with endogenously expressed PER2 and CRY1 fused to fluorescent proteins allowing us to simultaneously monitor the dynamics of CRY1 and PER2 proteins in live single cells. Both proteins are highly rhythmic in the nucleus of human cells with PER2 showing a much higher amplitude than CRY1. Surprisingly, CRY1 protein is nuclear at all circadian times indicating the absence of circadian gating of nuclear import. Furthermore, in the nucleus of individual cells CRY1 abundance rhythms are phase-delayed (~5 hours), and CRY1 levels are much higher (>5 times) compared to PER2 questioning the current model of the circadian oscillator.

Indexed as

Cell Line, TumorCircadian ClocksCircadian RhythmCLOCK ProteinsCRISPR-Cas SystemsCryptochromesGene Knock-In TechniquesGenes, ReporterHCT116 CellsHumansPeriod Circadian ProteinsSingle-Cell AnalysisCLOCK protein, humanCLOCK ProteinsCRY1 protein, humanCryptochromesPER2 protein, humanPeriod Circadian Proteins

Identifiers

PMID34145278
PMCPMC8213786
OpenAlexW3169703554

What Socratic holds

Textmetadata
LicenceCC BY
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 Socratic graph.