Evidence map›Paper›PMID 24776794›Full record

ArticleNature2014

Signal amplification and transduction in phytochrome photosensors.

Heikki Takala, Alexander Björling, Oskar Berntsson, Heli Lehtivuori, Stephan Niebling, Maria Hoernke, Irina Kosheleva, Robert Henning, Andreas Menzel, Janne A Ihalainen and 1 more

Open access · greenAbstract read
In one paragraph

Article in Nature, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 205 papers.

0numbers the graph read from it
0cells of the map it votes in
205citing papers in PubMed
43.9field-weighted citation impact, top 1% 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

205 citing papers in PubMed, 370 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Article
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  7. Article
  8. FTIR Spectroscopy of Red and Far-Red-Light Sensing Phytochromes In vitro.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  9. Article
  10. Article
  11. Propagation of Photoinduced Electric Field Changes Through Phytochrome and their Impact on Conformational Transitions.Chemphyschem : a European journal of chemical physics and physical chemistry · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Circular dichroism spectroscopy reveals multiple phytochrome photoproducts in equilibrium.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2025
    Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

145 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 4 institutions in 4 countries.

Heikki Takala *Nanoscience Center, Department of Biological and Environmental Science, University of Jyväskylä, 40014 Jyväskylä, Finland.
Alexander Björling *Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden.
Oskar BerntssonDepartment of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden.
Heli LehtivuoriNanoscience Center, Department of Biological and Environmental Science, University of Jyväskylä, 40014 Jyväskylä, Finland.
Stephan NieblingDepartment of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden.
Maria HoernkeDepartment of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden.
Irina KoshelevaCenter for Advanced Radiation Sources, The University of Chicago, IL 60637, USA.
Robert HenningCenter for Advanced Radiation Sources, The University of Chicago, IL 60637, USA.
Andreas MenzelPaul Scherrer Institut, 5232 Villigen PSI, Switzerland.
Janne A IhalainenNanoscience Center, Department of Biological and Environmental Science, University of Jyväskylä, 40014 Jyväskylä, Finland.
Sebastian WestenhoffDepartment of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden.
University of Gothenburg · SEUniversity of Jyväskylä · FIUniversity of Chicago · USPaul Scherrer Institute · CH

Funding

BioCARS: A Synchrotron Structure Biology ResourceR24GM111072 · NIGMS · UNIVERSITY OF CHICAGO · PI MOFFAT, JOHN KEITH · 2013 to 2016
$2.3M
European Research Council 279944NIGMS NIH HHS 1R24GM111072NIGMS NIH HHS R24 GM111072
6 · The paper itself

Abstract

Sensory proteins must relay structural signals from the sensory site over large distances to regulatory output domains. Phytochromes are a major family of red-light-sensing kinases that control diverse cellular functions in plants, bacteria and fungi. Bacterial phytochromes consist of a photosensory core and a carboxy-terminal regulatory domain. Structures of photosensory cores are reported in the resting state and conformational responses to light activation have been proposed in the vicinity of the chromophore. However, the structure of the signalling state and the mechanism of downstream signal relay through the photosensory core remain elusive. Here we report crystal and solution structures of the resting and activated states of the photosensory core of the bacteriophytochrome from Deinococcus radiodurans. The structures show an open and closed form of the dimeric protein for the activated and resting states, respectively. This nanometre-scale rearrangement is controlled by refolding of an evolutionarily conserved 'tongue', which is in contact with the chromophore. The findings reveal an unusual mechanism in which atomic-scale conformational changes around the chromophore are first amplified into an ångstrom-scale distance change in the tongue, and further grow into a nanometre-scale conformational signal. The structural mechanism is a blueprint for understanding how phytochromes connect to the cellular signalling network.

Indexed as

Light Signal TransductionBacterial ProteinsBinding SitesCrystallography, X-RayDeinococcusModels, MolecularPhytochromeProtein ConformationBacterial ProteinsPhytochrome

Identifiers

PMID24776794
PMCPMC4015848
OpenAlexW2050903472

What OpenQuestion holds

Textmetadata
LicenceTDM
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.