Evidence map›Paper›PMID 28945234›Full record

ArticleNature chemical biology2017

A homodimer interface without base pairs in an RNA mimic of red fluorescent protein.

Katherine Deigan Warner, Ljiljana Sjekloća, Wenjiao Song, Grigory S Filonov, Samie R Jaffrey, Adrian R Ferré-D'Amaré

Open access · greenAbstract read
In one paragraph

Article in Nature chemical biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed
6.0field-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

69 citing papers in PubMed, 138 citations in OpenAlex.

  1. Honeydew: A Fluorescent Aptamer for Low-Cost Azo Food Dyes.Chembiochem : a European journal of chemical biology · 2026
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  11. Structure-based insights into fluorogenic RNA aptamers.Acta biochimica et biophysica Sinica · 2024
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9 more citing papers are in PubMed but not listed here.

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

6 authors at 2 institutions in 1 country.

Katherine Deigan WarnerBiochemistry and Biophysics Center, National Heart, Lung and Blood Institute, Bethesda, Maryland, USA.
Ljiljana SjekloćaBiochemistry and Biophysics Center, National Heart, Lung and Blood Institute, Bethesda, Maryland, USA.
Wenjiao SongDepartment of Pharmacology, Weill-Cornell Medical College, Cornell University, New York, New York, USA.
Grigory S FilonovDepartment of Pharmacology, Weill-Cornell Medical College, Cornell University, New York, New York, USA.
Samie R JaffreyDepartment of Pharmacology, Weill-Cornell Medical College, Cornell University, New York, New York, USA.
Adrian R Ferré-D'AmaréBiochemistry and Biophysics Center, National Heart, Lung and Blood Institute, Bethesda, Maryland, USA.
Cornell University · USNational Heart Lung and Blood Institute · US

Funding

RNA: Tools for Cell BiologyZIAHL006188 · NHLBI · NATIONAL HEART, LUNG, AND BLOOD INSTITUTE · PI FERRÉ-D'AMARÉ, ADRIAN · 2014 to 2025
$9.5M
Engineering RNA-activated fluorescence switches for RNA imaging and analyte sensiR01NS064516 · NINDS · WEILL MEDICAL COLL OF CORNELL UNIV · PI JAFFREY, SAMIE R · 2009 to 2018
$3.6M
Intramural NIH HHS Z99 HL999999NINDS NIH HHS R01 NS064516
6 · The paper itself

Abstract

Corn, a 28-nucleotide RNA, increases yellow fluorescence of its cognate ligand 3,5-difluoro-4-hydroxybenzylidene-imidazolinone-2-oxime (DFHO) by >400-fold. Corn was selected in vitro to overcome limitations of other fluorogenic RNAs, particularly rapid photobleaching. We now report the Corn-DFHO co-crystal structure, discovering that the functional species is a quasisymmetric homodimer. Unusually, the dimer interface, in which six unpaired adenosines break overall two-fold symmetry, lacks any intermolecular base pairs. The homodimer encapsulates one DFHO at its interprotomer interface, sandwiching it with a G-quadruplex from each protomer. Corn and the green-fluorescent Spinach RNA are structurally unrelated. Their convergent use of G-quadruplexes underscores the usefulness of this motif for RNA-induced small-molecule fluorescence. The asymmetric dimer interface of Corn could provide a basis for the development of mutants that only fluoresce as heterodimers. Such variants would be analogous to Split GFP, and may be useful for analyzing RNA co-expression or association, or for designing self-assembling RNA nanostructures.

Indexed as

DimerizationG-QuadruplexesNucleic Acid ConformationAptamers, NucleotideBase PairingBase SequenceFluorescent DyesHumansLuminescent ProteinsOptical ImagingRed Fluorescent ProteinAptamers, NucleotideFluorescent DyesLuminescent ProteinsRed Fluorescent Protein

Identifiers

PMID28945234
PMCPMC5663454
OpenAlexW2759158289

What OpenQuestion holds

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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.