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[Substrate Properties of New Fluorescently Labeled Deoxycytidine Triphosphates in Enzymatic Synthesis of DNA with Polymerases of Families A and B]. 2018

D O Fesenko, and T O Guseinov, and S A Lapa, and V E Kuznetsova, and V E Shershov, and M A Spitsyn, and T V Nasedkina, and A S Zasedatelev, and A V Chudinov
Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia.

The efficiency of the incorporation of fluorescently labeled derivatives of 2'-deoxycytidine in DNA synthesized de novo has been studied using PCR with Taq and Tth polymerases of family A and Vent (exo-) and Deep Vent (exo-) polymerases of family B. Four derivatives of 5'-triphosphate-2'-deoxycytidine (dCTP) have different chemical structures of the indodicarbocyanine dye and Cy5 analogue attached to position 5 of cytosine. The kinetics of the accumulation of the PCR products and the intensity of the fluorescent signals in the hybridization analysis with immobilized DNA probes depend on the modification of the fluorescently labeled dCTP counterpart, its concentration, and the type of DNA polymerase. All labeled triphosphates showed some inhibitory effects on PCR. The best balance between the efficiency of incorporating labeled cytidine derivatives and the negative effect on the PCR kinetics has been shown in the case of Hot Taq polymerase in combination with the Cy5-dCTP analogue, which contains containing electrically neutral chro-mophore, the axis of which is a continuation of the linker between the chromophore and the pyrimidine base.

UI MeSH Term Description Entries
D002232 Carbocyanines Compounds that contain three methine groups. They are frequently used as cationic dyes used for differential staining of biological materials. Carbocyanine
D003845 Deoxycytosine Nucleotides Cytosine nucleotides which contain deoxyribose as the sugar moiety. Deoxycytidine Phosphates,Nucleotides, Deoxycytosine,Phosphates, Deoxycytidine
D004247 DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D004259 DNA-Directed DNA Polymerase DNA-dependent DNA polymerases found in bacteria, animal and plant cells. During the replication process, these enzymes catalyze the addition of deoxyribonucleotide residues to the end of a DNA strand in the presence of DNA as template-primer. They also possess exonuclease activity and therefore function in DNA repair. DNA Polymerase,DNA Polymerases,DNA-Dependent DNA Polymerases,DNA Polymerase N3,DNA Dependent DNA Polymerases,DNA Directed DNA Polymerase,DNA Polymerase, DNA-Directed,DNA Polymerases, DNA-Dependent,Polymerase N3, DNA,Polymerase, DNA,Polymerase, DNA-Directed DNA,Polymerases, DNA,Polymerases, DNA-Dependent DNA
D013194 Staining and Labeling The marking of biological material with a dye or other reagent for the purpose of identifying and quantitating components of tissues, cells or their extracts. Histological Labeling,Staining,Histological Labelings,Labeling and Staining,Labeling, Histological,Labelings, Histological,Stainings

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