ArticleBiophysical journal2005
Interhelical spacing in liquid crystalline spermine and spermidine-DNA precipitates.
Article in Biophysical journal, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.
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Who cites it
50 citing papers in PubMed.
- Translational Entropy-Driven Competitive and Additive Effects on DNA Higher-Order Structure via Ion Exchange Between Cations of Different Valencies.Entropy (Basel, Switzerland) · 2026Review
- Helical correlations in curved DNA condensates.Nucleic acids research · 2025Article
- Single-molecule measurements of double-stranded DNA condensation.Biophysical journal · 2025Review
- Temperature-induced DNA density transition in phage λ capsid revealed with contrast-matching SANS.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Sequence-Dependent Orientational Coupling and Electrostatic Attraction in Cation-Mediated DNA-DNA Interactions.Journal of chemical theory and computation · 2023Article
- Local structure of DNA toroids reveals curvature-dependent intermolecular forces.Nucleic acids research · 2021Article
- Counterion-Dependent Mechanisms of DNA Origami Nanostructure Stabilization Revealed by Atomistic Molecular Simulation.ACS nano · 2019Article
- Opposite effect of polyamines on In vitro gene expression: Enhancement at low concentrations but inhibition at high concentrations.PloS one · 2018Article
- Role of Disulfide Bonds on DNA Packaging Forces in Bull Sperm Chromatin.Biophysical journal · 2017Article
- Spermine Condenses DNA, but Not RNA Duplexes.Biophysical journal · 2017Article
- Evidence of protein-free homology recognition in magnetic bead force-extension experiments.Proceedings. Mathematical, physical, and engineering sciences · 2016Article
- Coexistence of coil and globule domains within a single confined DNA chain.Nucleic acids research · 2016Article
- DNA under Force: Mechanics, Electrostatics, and Hydration.Nanomaterials (Basel, Switzerland) · 2015Review
- DNA compaction induced by a cationic polymer or surfactant impact gene expression and DNA degradation.PloS one · 2014Article
- Ion competition in condensed DNA arrays in the attractive regime.Biophysical journal · 2013Article
- DNA ejection from an archaeal virus--a single-molecule approach.Biophysical journal · 2013Article
- Helical structure determines different susceptibilities of dsDNA, dsRNA, and tsDNA to counterion-induced condensation.Biophysical journal · 2013Article
- A comparison of DNA compaction by arginine and lysine peptides: a physical basis for arginine rich protamines.Biochemistry · 2013Article
- DNA self-assembly: from chirality to evolution.International journal of molecular sciences · 2013Review
- DNA bending-induced phase transition of encapsidated genome in phage λ.Nucleic acids research · 2013Article
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3 authors.
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No grant is acknowledged in the PubMed record.
Abstract
The structure of polyamines-DNA precipitates was studied by x-ray diffraction. Precise measurements of the interhelix distance a(H) were obtained at different NaCl, polyamine, and DNA concentrations. Most of the results were obtained using spermine and few others using spermidine. The precipitates are liquid crystalline, either hexagonal and/or cholesteric, with an interhelical spacing that depends on the ionic concentrations and on the polyamine type. In our experimental conditions, the spacing varies from 28.15 to 33.4 angstroms. This variation is interpreted in terms of different ionic components that are present inside the precipitates and that are thought to regulate the value of the cohesive energy of DNA. These results are discussed in relation to the biological processes requiring a closeness of double helices and to the role played by polyamine analogs in cancer therapy.
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