Recombinant Human DNA nucleotidylexotransferase (DNTT)

Uniprot Id

P04053

Target Species

Human

Target Name

DNTT

Target Full Name

DNA nucleotidylexotransferase

Target Function

Template-independent DNA polymerase which catalyzes the random addition of deoxynucleoside 5'-triphosphate to the 3'-end of a DNA initiator. One of the in vivo functions of this enzyme is the addition of nucleotides at the junction (N region) of rearranged Ig heavy chain and T-cell receptor gene segments during the maturation of B- and T-cells.

Target Subcellular Location

Nucleus.

Target Protein Families

DNA polymerase type-X family

Target Research Area

Immunology

Target Synonyms

Deoxynucleotidyltransferase terminal; DNA nucleotidylexotransferase; DNTT; Nucleosidetriphosphate DNA deoxynucleotidylexotransferase; TDT; TDT_HUMAN; Terminal addition enzyme; Terminal deoxynucleotidyltransferase; Terminal deoxyribonucleotidyltransferase; Terminal transferase

Target Background

This gene is a member of the DNA polymerase type-X family and encodes a template-independent DNA polymerase that catalyzes the addition of deoxynucleotides to the 3'-hydroxyl terminus of oligonucleotide primers. In vivo, the encoded protein is expressed in a restricted population of normal and malignant pre-B and pre-T lymphocytes during early differentiation, where it generates antigen receptor diversity by synthesizing non-germ line elements (N-regions) at the junctions of rearranged Ig heavy chain and T cell receptor gene segments. Alternatively spliced transcript variants encoding different isoforms of this gene have been described.