Evidence map›Paper›PMID 27025941›Full record

ArticleNature communications2016

Genome scale patterns of supercoiling in a bacterial chromosome.

Avantika Lal, Amlanjyoti Dhar, Andrei Trostel, Fedor Kouzine, Aswin S N Seshasayee, Sankar Adhya

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
15.9field-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

81 citing papers in PubMed, 128 citations in OpenAlex.

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  15. Bridging DNA contacts allow Dps frombioRxiv : the preprint server for biology · 2024
    Article
  16. In Vivo Genomic Supercoiling Mapping Using Psora-seq.Methods in molecular biology (Clifton, N.J.) · 2024
    Article
  17. Review
  18. Review
  19. Article
  20. Review

21 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 2 countries.

Avantika LalNational Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, Karnataka, India.ORCID http://orcid.org/0000-0002-5827-0826
Amlanjyoti DharLaboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA.
Andrei TrostelLaboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA.
Fedor KouzineLaboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA.
Aswin S N SeshasayeeNational Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, Karnataka, India.
Sankar AdhyaLaboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA.
National Institutes of Health · USTata Institute of Fundamental Research · IN

Funding

Regulation of Gene TranscriptionZIABC008751 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI ADHYA, SANKAR · 2009 to 2025
$24.3M
6 · The paper itself

Abstract

DNA in bacterial cells primarily exists in a negatively supercoiled state. The extent of supercoiling differs between regions of the chromosome, changes in response to external conditions and regulates gene expression. Here we report the use of trimethylpsoralen intercalation to map the extent of supercoiling across the Escherichia coli chromosome during exponential and stationary growth phases. We find that stationary phase E. coli cells display a gradient of negative supercoiling, with the terminus being more negatively supercoiled than the origin of replication, and that such a gradient is absent in exponentially growing cells. This stationary phase pattern is correlated with the binding of the nucleoid-associated protein HU, and we show that it is lost in an HU deletion strain. We suggest that HU establishes higher supercoiling near the terminus of the chromosome during stationary phase, whereas during exponential growth DNA gyrase and/or transcription equalizes supercoiling across the chromosome.

Indexed as

Genome, BacterialBacterial ProteinsChromosomes, BacterialDNA GyraseDNA, SuperhelicalEscherichia coliFicusinHydroxyureaProtein BindingTranscription, GeneticBacterial ProteinsDNA GyraseDNA, SuperhelicalFicusinHydroxyurea

Identifiers

PMID27025941
PMCPMC4820846
OpenAlexW2321058582

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.