The recombinational enhancer for DNA inversion functions independent of its orientation as a consequence of dyad symmetry in the Fis-DNA complex.
AUTOR(ES)
Kanaar, R
RESUMO
The Escherichia coli Fis protein binds to specific DNA sequences whose base composition varies enormously. One known function of Fis is to stimulate site-specific DNA recombination. We used the Gin-mediated DNA inversion system of bacteriophage Mu to analyze Fis-DNA interaction. Efficient inversion requires an enhancer which consists of two Fis binding sites at a fixed distance from each other. Using mutant enhancers in which one of the Fis binding sites is replaced we show that Fis binds symmetrically to the DNA and we locate the center of symmetry. Furthermore, we show that one of the Fis binding sites can be replaced by a Fis binding site that normally functions in a process other than site-specific recombination.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=318259Documentos Relacionados
- Structure of the Escherichia coli Fis-DNA complex probed by protein conjugated with 1,10-phenanthroline copper(I) complex.
- Stimulation of DNA inversion by FIS: evidence for enhancer-independent contacts with the Gin-gix complex.
- Location, degree, and direction of DNA bending associated with the Hin recombinational enhancer sequence and Fis-enhancer complex.
- Intermediates in Hin-mediated DNA inversion: a role for Fis and the recombinational enhancer in the strand exchange reaction.
- Rho-independent termination: dyad symmetry in DNA causes RNA polymerase to pause during transcription in vitro.
