Evidence map›Paper›PMID 33962653›Full record

ArticleGenome biology2021

Promoter G-quadruplex folding precedes transcription and is controlled by chromatin.

Jiazhen Shen, Dhaval Varshney, Angela Simeone, Xiaoyun Zhang, Santosh Adhikari, David Tannahill, Shankar Balasubramanian

Open access · goldAbstract read
In one paragraph

Article in Genome biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
8.6field-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

73 citing papers in PubMed, 136 citations in OpenAlex.

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13 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

7 authors at 2 institutions in 2 countries.

Jiazhen Shen *Li Ka Shing Centre, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK.
Dhaval Varshney *Li Ka Shing Centre, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK.
Angela SimeoneLi Ka Shing Centre, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK.
Xiaoyun ZhangYusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK.
Santosh AdhikariYusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK.
David TannahillLi Ka Shing Centre, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK.
Shankar BalasubramanianLi Ka Shing Centre, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK. sb10031@cam.ac.uk.ORCID 0000-0002-0281-5815
Cancer Research UK · GBUniversity of Cambridge · GB

Funding

Cancer Research UK 18618Cancer Research UK 19836Cancer Research UK 29214Cancer Research UK C9545/A19836Cancer Research UK C9681/A29214Wellcome Trust 209441/Z/17/Z
6 · The paper itself

Abstract

backgroundFour-stranded G-quadruplexes (G4s) are DNA secondary structures in the human genome that are primarily found in active promoters associated with elevated transcription. Here, we explore the relationship between the folding of promoter G4s, transcription and chromatin state.

resultsTranscriptional inhibition by DRB or by triptolide reveals that promoter G4 formation, as assessed by G4 ChIP-seq, does not depend on transcriptional activity. We then show that chromatin compaction can lead to loss of promoter G4s and is accompanied by a corresponding loss of RNA polymerase II (Pol II), thus establishing a link between G4 formation and chromatin accessibility. Furthermore, pre-treatment of cells with a G4-stabilising ligand mitigates the loss of Pol II at promoters induced by chromatin compaction.

conclusionsOverall, our findings show that G4 folding is coupled to the establishment of accessible chromatin and does not require active transcription.

Indexed as

G-QuadruplexesPromoter Regions, GeneticTranscription, GeneticCell HypoxiaCell Line, TumorChromatinHumansModels, GeneticRNA Polymerase IIChromatinRNA Polymerase IIChromatin compactionG-quadruplexesRNA polymerase IITranscription

Identifiers

PMID33962653
PMCPMC8103603
OpenAlexW3157271623

What OpenQuestion 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 OpenQuestion graph.