Accepted name: DNA nucleotidylexotransferase
Reaction: 2′-deoxyribonucleoside 5′-triphosphate + DNAn = diphosphate + DNAn+1
Other name(s): terminal deoxyribonucleotidyltransferase; terminal addition enzyme; addase; deoxynucleotidyl terminal transferase; deoxyribonucleic acid nucleotidyltransferase; deoxyribonucleic nucleotidyltransferase; terminal deoxynucleotide transferase; TdT
Systematic name: 2′-deoxyribonucleoside-5′-triphosphate:DNA deoxynucleotidylexotransferase
Comments: Catalyses template-independent extension of the 3′- end of a DNA strand by one nucleotide at a time. Cannot initiate a chain de novo. Nucleoside may be ribo- or 2′-deoxyribo-.
1.  Bollum, F.J. Deoxynucleotide-polymerizing enzymes of calf thymus gland. V. Homogeneous terminal deoxynucleotidyl transferase. J. Biol. Chem. 246 (1971) 909–916. [PMID: 5543689]
2.  Gottesman, M.E. and Canellakis, E.S. The terminal nucleotidyltransferases of calf thymus nuclei. J. Biol. Chem. 241 (1966) 4339–4352. [PMID: 4288534]
3.  Krakow, J.S., Coutsogeorgopoulos, C. and Canellakis, E.S. Studies on the incorporation of deoxyribonucleic acid. Biochim. Biophys. Acta 55 (1962) 639–650. [PMID: 14459258]
[EC created 1972]