Computation of Ionic Distributions Around Charged Biomolecular Structures: Results for Right-handed and Left-handed DNA
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We introduce an efficient computational methodology employing the potentials of mean force approach for estimating the detailed three-dimensional ionic distributions around arbitrarily complex charged biomolecular structures for all monovalent salt concentrations of practical interest (e.g., 0.1-5.0 M NaCl). Such distributions are required for specifying thermodynamic and structure-specific features of ion-mediated interactions of charged proteins, DNA and RNA, membranes, and macromolecular assemblies. As a first application, we present results for distributions around the B and ZI conformers of the DNA oligomer d(C-G)18.d(C-G)18. The ionic microenvironment depends strongly on the DNA conformation, sequence, and bulk salt concentrations.
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San Biagio P, Martorana V, Bulone D, Palma-Vittorelli M, Palma M Biophys J. 2010; 77(5):2470-8.
PMID: 20540927 PMC: 1300523. DOI: 10.1016/S0006-3495(99)77083-9.
Thiyagarajan S, Rajan S, Gautham N Nucleic Acids Res. 2004; 32(19):5945-53.
PMID: 15534365 PMC: 528804. DOI: 10.1093/nar/gkh919.
A unified theory of the B-Z transition of DNA in high and low concentrations of multivalent ions.
Gueron M, Demaret J, Filoche M Biophys J. 2000; 78(2):1070-83.
PMID: 10653820 PMC: 1300710. DOI: 10.1016/s0006-3495(00)76665-3.
Ashbaugh H, Garde S, Hummer G, Kaler E, Paulaitis M Biophys J. 1999; 77(2):645-54.
PMID: 10423414 PMC: 1300360. DOI: 10.1016/S0006-3495(99)76920-1.
Ion-induced folding of the hammerhead ribozyme: a fluorescence resonance energy transfer study.
Bassi G, Murchie A, Walter F, Clegg R, Lilley D EMBO J. 1998; 16(24):7481-9.
PMID: 9405376 PMC: 1170347. DOI: 10.1093/emboj/16.24.7481.