EC - DNA nucleotidylexotransferase

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IntEnz Enzyme Nomenclature


Accepted name:
DNA nucleotidylexotransferase
Other names:
deoxynucleotidyl terminal transferase
deoxyribonucleic acid nucleotidyltransferase
deoxyribonucleic nucleotidyltransferase
terminal addition enzyme
terminal deoxynucleotide transferase
terminal deoxyribonucleotidyltransferase
Systematic name:
nucleoside-triphosphate:DNA deoxynucleotidylexotransferase



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 deoxyribo-.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Protein domains and families: PROSITE:PDOC00452
Structural data: CSA , EC2PDB
Gene Ontology: GO:0003912
CAS Registry Number: 9027-67-2
UniProtKB/Swiss-Prot: (13) [show] [UniProt]


  1. Bollum, F.J.
    Deoxynucleotide-polymerizing enzymes of calf thymus gland. V. Homogeneous terminal deoxynucleotidyl transferase.
    J. Biol. Chem. 246 : 909-916 (1971). [PMID: 5543689]
  2. Gottesman, M.E. and Canellakis, E.S.
    The terminal nucleotidyltransferases of calf thymus nuclei.
    J. Biol. Chem. 241 : 4339-4352 (1966). [PMID: 4288534]
  3. Krakow, J.S., Coutsogeorgopoulos, C. and Canellakis, E.S.
    Studies on the incorporation of deoxyribonucleic acid.
    Biochim. Biophys. Acta 55 : 639-650 (1962).

[EC created 1972]