Evidence map›Paper›PMID 25223784›Full record

ArticleNucleic acids research2014

Unraveling the sequence-dependent polymorphic behavior of d(CpG) steps in B-DNA.

Pablo Daniel Dans, Ignacio Faustino, Federica Battistini, Krystyna Zakrzewska, Richard Lavery, Modesto Orozco

Abstract read
In one paragraph

Article in Nucleic acids research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
–field-weighted citation impact
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

40 citing papers in PubMed.

  1. hexABC seeking the physical code of DNA.Nature communications · 2026
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  3. Inferring DNA Kinkability from Biased MD Simulations.Journal of chemical theory and computation · 2026
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  4. Article
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  6. Review
  7. Deciphering the mechanical code of the genome and epigenome.Nature structural & molecular biology · 2022
    Article
  8. Twisting DNA by salt.Nucleic acids research · 2022
    Article
  9. Article
  10. Article
  11. Abnormal methylation in theQRB discovery · 2022
    Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Accurate modeling of DNA conformational flexibility by a multivariate Ising model.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  17. Article
  18. Article
  19. Article
  20. Article
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.

Pablo Daniel DansJoint BSC-CRG-IRB Research Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, Barcelona 08028, Spain.ORCID http://orcid.org/0000-0002-5927-372X
Ignacio FaustinoJoint BSC-CRG-IRB Research Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, Barcelona 08028, Spain.
Federica BattistiniJoint BSC-CRG-IRB Research Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, Barcelona 08028, Spain.
Krystyna ZakrzewskaBases Moléculaires et Structurales des Systèmes Infectieux, Univ. Lyon I/CNRS UMR 5086, IBCP, 7 Passage du Vercors, Lyon 69367, France.
Richard LaveryBases Moléculaires et Structurales des Systèmes Infectieux, Univ. Lyon I/CNRS UMR 5086, IBCP, 7 Passage du Vercors, Lyon 69367, France.
Modesto OrozcoJoint BSC-CRG-IRB Research Program in Computational Biology, Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, Barcelona 08028, Spain Departament de Bioquimica, Facultat de Biologia, Avgda Diagonal 647, Barcelona 08028, Spain modesto.orozco@irbbarcelona.org.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We have made a detailed study of one of the most surprising sources of polymorphism in B-DNA: the high twist/low twist (HT/LT) conformational change in the d(CpG) base pair step. Using extensive computations, complemented with database analysis, we were able to characterize the twist polymorphism in the d(CpG) step in all the possible tetranucleotide environment. We found that twist polymorphism is coupled with BI/BII transitions, and, quite surprisingly, with slide polymorphism in the neighboring step. Unexpectedly, the penetration of cations into the minor groove of the d(CpG) step seems to be the key element in promoting twist transitions. The tetranucleotide environment also plays an important role in the sequence-dependent d(CpG) polymorphism. In this connection, we have detected a previously unexplored intramolecular C-H···O hydrogen bond interaction that stabilizes the low twist state when 3'-purines flank the d(CpG) step. This work explains a coupled mechanism involving several apparently uncorrelated conformational transitions that has only been partially inferred by earlier experimental or theoretical studies. Our results provide a complete description of twist polymorphism in d(CpG) steps and a detailed picture of the molecular choreography associated with this conformational change.

Indexed as

CpG IslandsBase SequenceCationsDNA, B-FormHydrogen BondingNucleic Acid ConformationThermodynamicsTorsion, MechanicalCationsDNA, B-Form

Identifiers

PMID25223784
PMCPMC4191396

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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.