Thermodynamics and kinetics of PNA-DNA quadruplex-forming chimeras.

Thermodynamics and kinetics of PNA-DNA quadruplex-forming chimeras. Petraccone, L., Pagano, B., Esposito, V., Randazzo, A., Piccialli, G., Barone, G., Mattia, C. a, & Giancola, C. Journal of the American Chemical Society, 127(46):16215–23, December, 2005. ISBN: 1135011354

Paper doi abstract bibtex

PNA-DNA chimeras present the interesting properties of PNA, such as the high binding affinity to complementary single-strand (DNA or RNA), and the resistance to nuclease and protease degradation. At the same time, the limitations of an oligomer containing all PNA residues, such as low water solubility, self-aggregation, and low cellular uptake, are effectively overcome. Further, PNA-DNA chimeras possess interesting biological properties as antisense agents. We have explored the ability of PNA-DNA chimeric strands to assemble in quadruplex structures. The rate constant for association of the quadruplexes and their thermodynamic properties have been determined by CD spectroscopy and differential scanning calorimetry (DSC). Thermal denaturation experiments indicated higher thermal and thermodynamic stabilities for chimeric quadruplexes in comparison with the corresponding unmodified DNA quadruplex. Singular value decomposition analysis (SVD) suggests the presence of kinetically stable intermediate species in the quadruplex formation process. The experimental results have been discussed on the basis of molecular dynamic simulations. The ability of PNA-DNA chimeras to form stable quadruplex structures expands their potential utility as therapeutic agents.

@article{Petraccone2005,
	title = {Thermodynamics and kinetics of {PNA}-{DNA} quadruplex-forming chimeras.},
	volume = {127},
	issn = {0002-7863},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/16287312},
	doi = {10.1021/ja0545923},
	abstract = {PNA-DNA chimeras present the interesting properties of PNA, such as the high binding affinity to complementary single-strand (DNA or RNA), and the resistance to nuclease and protease degradation. At the same time, the limitations of an oligomer containing all PNA residues, such as low water solubility, self-aggregation, and low cellular uptake, are effectively overcome. Further, PNA-DNA chimeras possess interesting biological properties as antisense agents. We have explored the ability of PNA-DNA chimeric strands to assemble in quadruplex structures. The rate constant for association of the quadruplexes and their thermodynamic properties have been determined by CD spectroscopy and differential scanning calorimetry (DSC). Thermal denaturation experiments indicated higher thermal and thermodynamic stabilities for chimeric quadruplexes in comparison with the corresponding unmodified DNA quadruplex. Singular value decomposition analysis (SVD) suggests the presence of kinetically stable intermediate species in the quadruplex formation process. The experimental results have been discussed on the basis of molecular dynamic simulations. The ability of PNA-DNA chimeras to form stable quadruplex structures expands their potential utility as therapeutic agents.},
	number = {46},
	journal = {Journal of the American Chemical Society},
	author = {Petraccone, Luigi and Pagano, Bruno and Esposito, Veronica and Randazzo, Antonio and Piccialli, Gennaro and Barone, Guido and Mattia, Carlo a and Giancola, Concetta},
	month = dec,
	year = {2005},
	pmid = {16287312},
	note = {ISBN: 1135011354},
	keywords = {\#nosource, Calorimetry, Chemical, Circular Dichroism, DNA, DNA: chemistry, G-Quadruplexes, Kinetics, Models, Nucleic Acid Conformation, Peptide Nucleic Acids, Peptide Nucleic Acids: chemistry, Protein Conformation, Temperature, Thermodynamics},
	pages = {16215--23},
}

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