Fine structure of DNA melting curves

Yu L. Lyubchenko, M. D. Frank–Kamenetskii, A. V. Volgodskii, Yu S. Lazurkin, G. G. Gause

Research output: Contribution to journalArticle

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Abstract

Theoretical calculations predict that the differential melting curves for random polynucleotide sequences having lengths up to several tens of thousands of base pairs have a clear‐cut fine structure. This structure appears in the form of multiple narrow peaks 0.3–0.4°C wide on the bell shaped main curve. The differential melting curves have different shapes for different specific sequences. The theory also predicts the disappearance of the fine structure when the length of the sequence increases and when circular, covalently closed DNA is considered instead of the open structure. The predictions of the theory were confirmed by the measurements of differential melting curves for open and covalently closed circular forms of DNA for PM2 phage (N = 104 base pairs) and also for other phage DNA's of different length: T7 (N = 3.8 × 104); SD (N = 9.2 × 104); T2 (N = 17 × 104). It was shown that the effect of fine structure results mainly from the cooperative melting out of DNA regions 300–500 base pairs long.

Original languageEnglish (US)
Pages (from-to)1019-1036
Number of pages18
JournalBiopolymers
Volume15
Issue number6
DOIs
StatePublished - Jun 1976

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Nucleic Acid Denaturation
Base Pairing
Freezing
Melting
DNA
Bacteriophages
Circular DNA
Polynucleotides

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Biomaterials
  • Organic Chemistry

Cite this

Lyubchenko, Y. L., Frank–Kamenetskii, M. D., Volgodskii, A. V., Lazurkin, Y. S., & Gause, G. G. (1976). Fine structure of DNA melting curves. Biopolymers, 15(6), 1019-1036. https://doi.org/10.1002/bip.1976.360150602

Fine structure of DNA melting curves. / Lyubchenko, Yu L.; Frank–Kamenetskii, M. D.; Volgodskii, A. V.; Lazurkin, Yu S.; Gause, G. G.

In: Biopolymers, Vol. 15, No. 6, 06.1976, p. 1019-1036.

Research output: Contribution to journalArticle

Lyubchenko, YL, Frank–Kamenetskii, MD, Volgodskii, AV, Lazurkin, YS & Gause, GG 1976, 'Fine structure of DNA melting curves', Biopolymers, vol. 15, no. 6, pp. 1019-1036. https://doi.org/10.1002/bip.1976.360150602
Lyubchenko YL, Frank–Kamenetskii MD, Volgodskii AV, Lazurkin YS, Gause GG. Fine structure of DNA melting curves. Biopolymers. 1976 Jun;15(6):1019-1036. https://doi.org/10.1002/bip.1976.360150602
Lyubchenko, Yu L. ; Frank–Kamenetskii, M. D. ; Volgodskii, A. V. ; Lazurkin, Yu S. ; Gause, G. G. / Fine structure of DNA melting curves. In: Biopolymers. 1976 ; Vol. 15, No. 6. pp. 1019-1036.
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