Evidence map›Paper›PMID 19479049›Full record

ArticlePloS one2009

Concentration and length dependence of DNA looping in transcriptional regulation.

Lin Han, Hernan G Garcia, Seth Blumberg, Kevin B Towles, John F Beausang, Philip C Nelson, Rob Phillips

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
4.0field-weighted citation impact, top 5% 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

61 citing papers in PubMed, 94 citations in OpenAlex.

  1. 3D Genome Engineering Using CRISPR/dCas Systems.International journal of molecular sciences · 2026
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  2. Competition between glycine and GABAProceedings of the National Academy of Sciences of the United States of America · 2025
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  4. ACS chemical biology · 2024
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  5. mRNA initiation and termination are spatially coordinated.bioRxiv : the preprint server for biology · 2024
    Article
  6. Detecting DNA Loops Using Tethered Particle Motion.Methods in molecular biology (Clifton, N.J.) · 2024
    Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Tethered multifluorophore motion reveals equilibrium transition kinetics of single DNA double helices.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

1 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 1 country.

Lin HanDepartment of Applied Physics, California Institute of Technology, Pasadena, California, United States of America.
Hernan G Garcia
Seth Blumberg
Kevin B Towles
John F Beausang
Philip C Nelson
Rob Phillips
California Institute of Technology · USUniversity of Pennsylvania · US

Funding

NIH Director's Pioneer Award (RMI)DP1OD000217 · OD · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI PHILLIPS, ROB · 2004 to 2008
$4.0M
NIH HHS DP1 OD000217
6 · The paper itself

Abstract

In many cases, transcriptional regulation involves the binding of transcription factors at sites on the DNA that are not immediately adjacent to the promoter of interest. This action at a distance is often mediated by the formation of DNA loops: Binding at two or more sites on the DNA results in the formation of a loop, which can bring the transcription factor into the immediate neighborhood of the relevant promoter. These processes are important in settings ranging from the historic bacterial examples (bacterial metabolism and the lytic-lysogeny decision in bacteriophage), to the modern concept of gene regulation to regulatory processes central to pattern formation during development of multicellular organisms. Though there have been a variety of insights into the combinatorial aspects of transcriptional control, the mechanism of DNA looping as an agent of combinatorial control in both prokaryotes and eukaryotes remains unclear. We use single-molecule techniques to dissect DNA looping in the lac operon. In particular, we measure the propensity for DNA looping by the Lac repressor as a function of the concentration of repressor protein and as a function of the distance between repressor binding sites. As with earlier single-molecule studies, we find (at least) two distinct looped states and demonstrate that the presence of these two states depends both upon the concentration of repressor protein and the distance between the two repressor binding sites. We find that loops form even at interoperator spacings considerably shorter than the DNA persistence length, without the intervention of any other proteins to prebend the DNA. The concentration measurements also permit us to use a simple statistical mechanical model of DNA loop formation to determine the free energy of DNA looping, or equivalently, the for looping.

Indexed as

Gene Expression Regulation, BacterialNucleic Acid ConformationTranscription, GeneticBacterial ProteinsDNA, BacterialLac RepressorsMutagenesisOperator Regions, GeneticPromoter Regions, GeneticRepressor ProteinsBacterial ProteinsDNA, BacterialLac RepressorsRepressor Proteins

Identifiers

PMID19479049
PMCPMC2682762
OpenAlexW2078037305

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.