Flexibility in DNA recombination: structure of the lambda integrase catalytic core.
Kwon, H.J., Tirumalai, R., Landy, A., Ellenberger, T.(1997) Science 276: 126-131
- PubMed: 9082984 
- DOI: 10.1126/science.276.5309.126
- Primary Citation of Related Structures:  
1AE9 - PubMed Abstract: 
Lambda integrase is archetypic of site-specific recombinases that catalyze intermolecular DNA rearrangements without energetic input. DNA cleavage, strand exchange, and religation steps are linked by a covalent phosphotyrosine intermediate in which Tyr342 is attached to the 3'-phosphate of the DNA cut site ...