[Analogs of deoxyribonucleoside-5'-triphosphates modified in the base and sugar moieties: substrate properties in DNA biosynthesis in cell-free systems].
Incorporation of 2'-deoxyribonucleotide 5'-triphosphate derivatives, chemically modified both in the base and at 3'-position, into DNA by four different DNA polymerases was investigated. It is shown that 3'-azido- and 3'-amino-2',3'-dideoxy-(E)-5-(2-bromovinyl)-uridine 5'-triphosphates effectively terminate DNA synthesis catalyzed by E. coli DNA polymerase I, rat liver DNA polymerase beta, and AMV reverse transcriptase. Calf thymus DNA polymerase alpha incorporates only the 3'-amino derivative. DNA polymerases I and beta catalyse DNA synthesis in the presence of beta-D-(2'-deoxyribofuranosyl)-1-benzimidazol 5'-triphosphate, inserting the corresponding monophosphate in place of -dGTP, whereas 3'-substituted analogues of this compound were inactive in the reactions.
A M
AM
Atrazhev
N B
NB
Diatkina
T A
TA
Rozovskaia
L A
LA
Aleksandrova
Z G
ZG
Chidzhavadze
D002474:Cell-Free System; D055598:Chemical Phenomena; D002621:Chemistry; D004247:DNA / Q000096:biosynthesis*; D004256:DNA Polymerase I / Q000378:metabolism*; D003854:Deoxyribonucleotides; D013379:Substrate Specificity
D003854:Deoxyribonucleotides; D004247:DNA; D004256:DNA Polymerase I
Analogi dezoksiribonukleozid-5'-trifosfatov, modifitsirovannye po osnovaniiu i sakharnomu ostatku: substratnye svoĭstva pri biosinteze DNK v beskletochnykh sistemakh.