Duplex structure formation between oligo(dA)'s and oligo(dT)'s generated by thymine-specific interaction with netropsin.

C Zimmer; G Luck; I Fric

doi:10.1093/nar/3.6.1521

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Duplex structure formation between oligo(dA)'s and oligo(dT)'s generated by thymine-specific interaction with netropsin.

C Zimmer·G Luck·I Fric

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Abstract

The formation of oligomeric duplex molecules in the presence of the antibiotic netropsin in the series p(dA)n-p(dT)n is demonstrated using low-temperature CD measurements. Addition of Netropsin to mixtures of oligomers generates the same type of CD spectra as observed for poly(dA)-poly(dT) and maintains the duplex structure at temperatures at which base pairing of free oligomers is thermodynamically unstable. The shortest chain length forming a netropsin complex by thymine-specific interaction with the oligopeptide is represented by p(dA)4-p(dt)4. Studies with sequence isomers show that adjacent thymine residues strongly favour the complex formation with the oligopeptide.

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C Zimmer, G Luck, I Fric. 1976. Duplex structure formation between oligo(dA)'s and oligo(dT)'s generated by thymine-specific interaction with netropsin.. https://doi.org/10.1093/nar%2F3.6.1521

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