Specificity of DNA recognition in the nucleoprotein complex for site-specific recombination by Tn21 resolvase.

Abstract

Resolvases from Tn3-like transposons catalyse site-specific recombination at res sites. Each res site has 3 binding sites for resolvase, I, II, and III. The res sites in Tn3 and Tn21 have similar structures at I and II but they differ at III. Mutagenesis of the Tn21 res site showed that sub-site III is essential for recombination though the sequences in III… (More)

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