TDT (Terminal addition enzyme, Terminal deoxynucleotidyltransferase)

Terminal Deoxynucleotidyl Transferase, also known as TdT and terminal transferase, is a unique DNA polymerase without template direction catalyzes the addition of deoxyribonucleotides onto the 3-prime-hydroxyl end of DNA primers. Its gene is mapped to the region 10q23-q24. And TDT cDNA contains an open reading frame of 1,530 basepairs corresponding to a protein containing 510 amino acids. TDT may be responsible for inserting nucleotides (N regions) at the V(H)-D and D-J(H) junctions of immunoglobulin genes. The enzyme is present in immature thymocytes, some bone marrow cells, transformed pre-B and pre-T cell lines, and leukemia cells. Additionally, TdT catalyses the addition of nucleotides to the 3' terminus of a DNA molecule. Unlike most DNA polymerases it does not require a template. The preferred substrate of this enzyme is a 3'-overhang, but it can also add nucleotides to blunt or recessed 3' ends. Cobalt is a necessary cofactor.\n\nUniProt Number:\nP04053\n\nGene ID:\nDNTT\n\nApplications:\nSuitable for use in Western Blot.\n\nRecommended Dilution:\nOptimal dilutions to be determined by the researcher.\n\nStorage and Handling:\nStore at -20?C for one year. After reconstitution, store at 4?C for one month. Can also be aliquoted and stored frozen at -20?C for long term.\nAvoid repeated freezing and thawing. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

145253

Size

100ug

Applications

WB

Hosts

Rabbit

Reactivities

Hum

Form

Supplied as a lyophilized powder. Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3. Reconstitution: Add 0.2ml of distilled water will yield a concentration of 500ug/ml.

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

Isotype

IgG

References

1. Landau, N. R.; St. John, T. P.; Weissman, I. L.; Wolf, S. C.; Silverstone, A. E.; Baltimore, D. : Cloning of terminal transferase cDNA by antibody screening. Proc. Nat. Acad. Sci. 81: 5836-5840, 1984.\n2. Yang-Feng, T. L.; Landau, N. R.; Baltimore, D.; Francke, U. : The terminal deoxynucleotidyltransferase gene is located on human chromosome 10 (10q23-q24) and on mouse chromosome 19. Cytogenet. Cell Genet. 43: 121-126, 1986.\n3. Riley, L. K.; Morrow, J. K.; Danton, M. J.; Coleman, M. S. : Human terminal deoxyribonucleotidyltransferase: molecular cloning and structural analysis of the gene and 5-prime flanking region. Proc. Nat. Acad. Sci. 85: 2489-2493, 1988.

Additional Info

Recognizes human TDT. No crossreactivity with other proteins.