2'-Deoxyadenosine-5'-triphosphate (dATP) is a purine nucleotide and derivative of the nucleic acid adenosine 5'-triphosphate .1 dATP is a substrate for DNA polymerase in the synthesis of DNA.2 It is a noncompetitive inhibitor of ribonucleotide reductases, which provides feedback inhibition during DNA synthesis.1 dATP has commonly been used in DNA synthesis, sequencing, and labeling in research applications.3,4 dATP accumulates in adenosine deaminase deficiency, a disorder characterized by mutations in the gene for adenosine deaminase, the enzyme that catalyzes the deamination of adenosine and deoxyadenosine.5
1.Berg, J.M., Tymoczko, J.L., and Stryer, L.Key steps in nucleotide biosynthesis are regulated by feedback inhibitionBiochemistry(2002) 2.Berg, J.M., Tymoczko, J.L., and Stryer, L.DNA is replicated by polymerases that take instructions from templatesBiochemistry(2002) 3.Cadwell, R.C., and Joyce, G.F.Randomization of genes by PCR mutagenesisPCR Methods Appl.2(1)28-33(1992) 4.Steffens, D.L., Jang, G.Y., Sutter, S.L., et al.An infrared fluorescent dATP for labeling DNAGenome Res.5(4)393-399(1995) 5.Flinn, A.M., and Gennery, A.R.Adenosine deaminase deficiency: A reviewOrphanet J. Rare Dis.13(1)65(2018)