Nucleic Acids Research, 1983, Vol. 11, No. 22 8103-8109
© 1983
ENZYMOLOGY |
T4 DNA ligase can seal a nick in double-stranded DNA limited by a 5'-phosphoryiated base-free deoxyribose residue
Biochimie, Faculté des Sciences, Université de Liége Sart Tilman B6, 4000 Liége I, Belgium
Received August 1, 1983. Revised October 17, 1983. Accepted October 17, 1983.
The 5' AP endodeoxyribonucleases hydrolyze the phosphodiester bond 5' to AP (apurinic or apyrimidinic) sites in double-stranded DNA leaving 3'-OH and 5'-phosphate ends. These nicks are sealed by T4 DNA ligase although the 5'-phosphate end belongs to a base-free deoxyribose.