Evidence map›Paper›PMID 30590801›Full record

ArticleNucleic acids research2019

Two-quartet kit* G-quadruplex is formed via double-stranded pre-folded structure.

Anita Kotar, Riccardo Rigo, Claudia Sissi, Janez Plavec

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
2.3field-weighted citation impact, top 10% 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

33 citing papers in PubMed, 54 citations in OpenAlex.

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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

4 authors at 3 institutions in 2 countries.

Anita KotarSlovenian NMR Center, National Institute of Chemistry, 1000 Ljubljana, Slovenia.
Riccardo RigoDepartment of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy.
Claudia SissiDepartment of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy.
Janez PlavecSlovenian NMR Center, National Institute of Chemistry, 1000 Ljubljana, Slovenia.
University of Padua · ITNational Institute of Chemistry · SIUniversity of Ljubljana · SI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In the promoter of c-KIT proto-oncogene, whose deregulation has been implicated in many cancers, three G-rich regions (kit1, kit* and kit2) are able to fold into G-quadruplexes. While kit1 and kit2 have been studied in depth, little information is available on kit* folding behavior despite its key role in regulation of c-KIT transcription. Notably, kit* contains consensus sites for SP1 and AP2 transcription factors. Herein, a set of complementary spectroscopic and biophysical methods reveals that kit*, d[GGCGAGGAGGGGCGTGGCCGGC], adopts a chair type antiparallel G-quadruplex with two G-quartets at physiological relevant concentrations of KCl. Heterogeneous ensemble of structures is observed in the presence of Na+ and NH4+ ions, which however stabilize pre-folded structure. In the presence of K+ ions stacking interactions of adenine and thymine residues on the top G-quartet contribute to structural stability together with a G10•C18 base pair and a fold-back motif of the five residues at the 3'-terminal under the bottom G-quartet. The 3'-tail enables formation of a bimolecular pre-folded structure that drives folding of kit* into a single G-quadruplex. Intriguingly, kinetics of kit* G-quadruplex formation matches timescale of transcriptional processes and might demonstrate interplay of kinetic and thermodynamic factors for understanding regulation of c-KIT proto-oncogene expression.

Indexed as

G-QuadruplexesModels, MolecularNucleic Acid ConformationAdenineAmmonium CompoundsBiophysical PhenomenaHumansIonsKineticsPromoter Regions, GeneticProto-Oncogene MasProto-Oncogene Proteins c-kitSodiumThermodynamicsThymineAdenineAmmonium CompoundsIonsKIT protein, humanMAS1 protein, humanProto-Oncogene MasProto-Oncogene Proteins c-kitSodiumThymine

Identifiers

PMID30590801
PMCPMC6411839
OpenAlexW2906248005

What OpenQuestion holds

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LicenceCC BY-NC
Read underepoch 390

Registered trials

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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.