Evidence map›Paper›PMID 21606338›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Structural basis of photosensitivity in a bacterial light-oxygen-voltage/helix-turn-helix (LOV-HTH) DNA-binding protein.

Abigail I Nash, Reginald McNulty, Mary Elizabeth Shillito, Trevor E Swartz, Roberto A Bogomolni, Hartmut Luecke, Kevin H Gardner

Erratum issuedAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 116 papers.

0numbers the graph read from it
0cells of the map it votes in
116citing papers in PubMed
15.6field-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

116 citing papers in PubMed, 210 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Biophysical journal · 2026
    Article
  5. Review
  6. Small Molecule Regulation of CLOCK:BMAL1 DNA Binding Activity.bioRxiv : the preprint server for biology · 2026
    Article
  7. Article
  8. Structural Basis of a Novel Heme Binding Bacterial One-Component Switch.bioRxiv : the preprint server for biology · 2026
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Sensing a rainbow of colors: algal photoreceptors.Frontiers in plant science · 2025
    Review
  20. Article

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

4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

7 authors at 3 institutions in 1 country.

Abigail I NashDepartment of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8816, USA.
Reginald McNulty
Mary Elizabeth Shillito
Trevor E Swartz
Roberto A Bogomolni
Hartmut Luecke
Kevin H Gardner
University of California, Irvine · USThe University of Texas Southwestern Medical Center · USUniversity of California, Santa Cruz · US

Funding

ZWITTERION SURFACTANT DDMAB FOR IMPROV STABIL OF PROTEINP41RR001209 · NCRR · STANFORD UNIVERSITY · PI GONZALEZ, ANA M · 1985 to 2011
$38.9M
Molecular Biophysics Predoctoral Training ProgramT32GM008297 · NIGMS · UT SOUTHWESTERN MEDICAL CENTER · PI CHOOK, YUH MIN · 1989 to 2018
$2.4M
Structural studies of PAS domain signaling mechanismsR01GM081875 · NIGMS · UT SOUTHWESTERN MEDICAL CENTER · PI GARDNER, KEVIN H · 2007 to 2010
$1.2M
NCRR NIH HHS P41 RR001209NIAID NIH HHS R01 AI07000NIGMS NIH HHS R01 GM081875NIGMS NIH HHS T32 GM008297
6 · The paper itself

Abstract

Light-oxygen-voltage (LOV) domains are blue light-activated signaling modules integral to a wide range of photosensory proteins. Upon illumination, LOV domains form internal protein-flavin adducts that generate conformational changes which control effector function. Here we advance our understanding of LOV regulation with structural, biophysical, and biochemical studies of EL222, a light-regulated DNA-binding protein. The dark-state crystal structure reveals interactions between the EL222 LOV and helix-turn-helix domains that we show inhibit DNA binding. Solution biophysical data indicate that illumination breaks these interactions, freeing the LOV and helix-turn-helix domains of each other. This conformational change has a key functional effect, allowing EL222 to bind DNA in a light-dependent manner. Our data reveal a conserved signaling mechanism among diverse LOV-containing proteins, where light-induced conformational changes trigger activation via a conserved interaction surface.

Indexed as

LightProtein Structure, TertiaryBacterial ProteinsBinding SitesCrystallography, X-RayCysteineDNA-Binding ProteinsElectrophoresis, Polyacrylamide GelFlavin MononucleotideHelix-Turn-Helix MotifsMagnetic Resonance SpectroscopyModels, MolecularOligonucleotidesProtein BindingProtein ConformationProtein Structure, SecondaryBacterial ProteinsCysteineDNA-Binding ProteinsFlavin MononucleotideOligonucleotides

Identifiers

PMID21606338
PMCPMC3111320
OpenAlexW2114712156

What OpenQuestion holds

Textmetadata
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.