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. 1999 Nov;77(5):2366–2376. doi: 10.1016/S0006-3495(99)77074-8

From atomic to mesoscopic descriptions of the internal dynamics of DNA

N Bruant 1, D Flatters 1, R Lavery 1, D Genest 1
PMCID: PMC1300514  PMID: 10545340

Abstract

An analysis of four 1-ns molecular dynamics trajectories for two different 15-bp oligonucleotides is presented. Our aim is to show which groups of atoms can be treated as rigid bodies within a bead representation of DNA, independently of the base sequence and for any conformations belonging to the A/B family. Five models with moderate intragroup deformations are proposed in which the groups are formed of atoms belonging to a single nucleotide or to a complementary nucleotide pair. The influence of group deformation in two of these models is studied using canonical correlation analysis, and it is shown that the internal DNA dynamics is indeed dominated by the rigid motion of the defined atom groups. Finally, using one of the models within a bead representation of duplex DNA makes it possible to obtain stretching, torsional, and bending rigidities in reasonable agreement with experiment but points to strongly correlated stretching motions.

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Selected References

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