Evidence map›Paper›PMID 26673723›Full record

ArticleNucleic acids research2016

G-quadruplexes with (4n - 1) guanines in the G-tetrad core: formation of a G-triad·water complex and implication for small-molecule binding.

Brahim Heddi, Nerea Martín-Pintado, Zhalgas Serimbetov, Teuku Mahfuzh Aufar Kari, Anh Tuân Phan

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

45 citing papers in PubMed, 83 citations in OpenAlex.

  1. NA-CDQuant: Quantitative spectral analysis of nucleic acid structure by circular dichroism spectroscopy.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. G-Quadruplexes: Structural Diversity and Emerging Roles in Biomolecular Condensation.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. NMR Screen Reveals the Diverse Structural Landscape of a G-Quadruplex Library.Chemistry (Weinheim an der Bergstrasse, Germany) · 2024
    Article
  11. Article
  12. Review
  13. A TeZla micromixer for interrogating the early and broad folding landscape of G-quadruplex via multistage velocity descending.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  14. Review
  15. Review
  16. Article
  17. Fluorophore-mediated Photooxidation of the Guanine Heterocycle.Journal of physical organic chemistry · 2022
    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

5 authors at 1 institution in 1 country.

Brahim HeddiSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore heddibrahim@ntu.edu.sg.
Nerea Martín-PintadoSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
Zhalgas SerimbetovSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
Teuku Mahfuzh Aufar KariSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
Anh Tuân PhanSchool of Physical and Mathematical Sciences, Nanyang Technological University, Singapore phantuan@ntu.edu.sg.
Nanyang Technological University · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

G-quadruplexes are non-canonical structures of nucleic acids, in which guanine bases form planar G-tetrads (G·G·G·G) that stack on each other in the core of the structure. G-quadruplexes generally contain multiple times of four (4n) guanines in the core. Here, we study the structure of G-quadruplexes with only (4n - 1) guanines in the core. The solution structure of a DNA sequence containing 11 guanines showed the formation of a parallel G-quadruplex involving two G-tetrads and one G-triad with a vacant site. Molecular dynamics simulation established the formation of a stable G-triad·water complex, where water molecules mimic the position of the missing guanine in the vacant site. The concept of forming G-quadruplexes with missing guanines in the core broadens the current definition of G-quadruplex-forming sequences. The potential ability of such structures to bind different metabolites, including guanine, guanosine and GTP, in the vacant site, could have biological implications in regulatory functions. Formation of this unique binding pocket in the G-triad could be used as a specific target in drug design.

Indexed as

G-QuadruplexesCircular DichroismGuanineGuanosineMagnetic Resonance SpectroscopyMolecular Dynamics SimulationNucleic Acid ConformationSpectrophotometry, UltravioletWaterGuanineGuanosineWater

Identifiers

PMID26673723
PMCPMC4737152
OpenAlexW2229724153

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.