Related Experiment Videos
DNA-binding properties of the Hin recombinase
A C Glasgow1, M F Bruist, M I Simon
1Division of Biology, California Institute of Technology, Pasadena 91125.
The Journal of Biological Chemistry
|June 15, 1989
Summary
The Salmonella Hin recombinase recognizes specific DNA sequences (hix sites) independently. Hin binds these sites as a dimer, revealing novel DNA recognition mechanisms crucial for DNA inversion.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- The Salmonella Hin recombinase facilitates site-specific DNA recombination.
- This process involves two 26 bp inverted repeat sequences, hixL and hixR.
Purpose of the Study:
- To investigate how Hin recognizes and binds to the hix recombination sites.
- To understand the initial binding events and the nature of Hin-DNA complexes.
Main Methods:
- Nuclease and chemical protection studies on DNA substrates.
- DNA-binding assays with mutant sites and methylation interference experiments.
- Gel filtration assays with purified Hin protein.
Main Results:
- Hin binds hixL and hixR independently of other proteins (Fis, HU).
- Critical DNA bases for Hin recognition are within an 8-bp sequence in each 12-bp half-site.
- Hin likely binds the recombination sites as a dimer.
Conclusions:
- Hin exhibits novel DNA recognition properties.
- Understanding Hin-DNA interactions provides insights into the DNA inversion mechanism.