JBC, Vol. 250, Issue 8, 2823-2829, Apr, 1975
The ultraviolet endonuclease of bacteriophage T4. Further characterization
K. Minton, M. Durphy, R. Taylor and E. C. Friedberg
The T4 ultraviolet endonuclease was previously shown to produce strand
incisions (nicks) in ultraviolet-irradiated DNA on the 5' side of thymine
dimers. The present studies demonstrate that the purified endonuclease
creates 3'-OH and 5'-P termini at the sites of nicking. Photoreactivation
of ultraviolet-sensitive sites, thereby demonstrating directly
endonucleause has a molecular weight of approximately 18,000 and attacks
ultraviolet-irradiated single-stranded Escherichia coli and M-13 DNA.