Scholarlink

Abstract <p>In PCR with Taq polymerase on the <i>Staphylococcus aureus</i> genomic DNA template, the substrate properties of eight fluorescently labeled deoxyuridine and deoxycytidine triphosphates (Cy5-dUTP and Cy5-dCTP), which are dU–dC pairs with similar cyanine substituents, were compared during simultaneous introduction of such pairs in PCR. The different Cy5-dUTP and Cy5-dCTP pairs each had substituents with different linker lengths between the nitrogenous base and the fluorophore and between the quaternary ammonium group and the second heterocycle of the Cy5 fluorophore. The amplification efficiency, as well as the yield of the product, and the density of label incorporation were determined. It was found that, with the simultaneous introduction of Cy5-modified dU and dC into the reaction at equimolar concentrations, the inhibitory effect was not directly proportional to the concentration, in contrast to that with separate (individual) introduction of fluorescently labeled dNTPs. This allows one to use the simultaneous introduction of Cy5-modified dU and dC into PCR to increase sensitivity in methods based on the detection of a fluorescent signal, for example, in DNA-microarray technology.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Simultaneous Incorporation of Different Cy5-Labeled Deoxypyrimidine Nucleotides into a Synthesized DNA Chain

  • 期刊论文

  • 发表日期：

    2025年11月17日

查看全文
  • P. M. Monakova,
  • V. E. Shershov,
  • S. A. Surzhikov,
  • I. V. Grechishnikova,
  • S. A. Lapa,
  • A. V. Chudinov

摘要

Abstract

In PCR with Taq polymerase on the Staphylococcus aureus genomic DNA template, the substrate properties of eight fluorescently labeled deoxyuridine and deoxycytidine triphosphates (Cy5-dUTP and Cy5-dCTP), which are dU–dC pairs with similar cyanine substituents, were compared during simultaneous introduction of such pairs in PCR. The different Cy5-dUTP and Cy5-dCTP pairs each had substituents with different linker lengths between the nitrogenous base and the fluorophore and between the quaternary ammonium group and the second heterocycle of the Cy5 fluorophore. The amplification efficiency, as well as the yield of the product, and the density of label incorporation were determined. It was found that, with the simultaneous introduction of Cy5-modified dU and dC into the reaction at equimolar concentrations, the inhibitory effect was not directly proportional to the concentration, in contrast to that with separate (individual) introduction of fluorescently labeled dNTPs. This allows one to use the simultaneous introduction of Cy5-modified dU and dC into PCR to increase sensitivity in methods based on the detection of a fluorescent signal, for example, in DNA-microarray technology.