Under the assumptions outlined in this paper and those of Manning's theory of polyelectrolyte screening the electrostatic interaction of histone 1 and DNA is examined and shown to lead to spontaneous bending of DNA. Critical variables for this bending are the ionic strength, the length of DNA interacting with each histone 1 molecule, and the fraction of DNA phosphate charges neutralized by the histone 1 molecule. This interaction is postulated as accounting for the observed folding of polynucleosomes into the "solenoid" regular structure. Wherever possible comparison is made between theoretical predictions and available experimental results. Finally, biological implications are briefly discussed.
ASJC Scopus subject areas
- Statistics and Probability
- Modeling and Simulation
- Biochemistry, Genetics and Molecular Biology(all)
- Immunology and Microbiology(all)
- Agricultural and Biological Sciences(all)
- Applied Mathematics