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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2024-19-5-408-417</article-id><article-id custom-type="edn" pub-id-type="custom">KLGQRR</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-2158</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOCHEMISTRY AND BIOTECHNOLOGY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>БИОХИМИЯ И БИОТЕХНОЛОГИЯ</subject></subj-group></article-categories><title-group><article-title>Investigation of the substrate properties of fluorescently labeled pyrimidine triphosphates in recombinase polymerase amplification</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование субстратных свойств флуоресцентно-меченых пиримидинтрифосфатов в рекомбиназной полимеразной амплификации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-5604-8171</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Епифанов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Epifanov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Епифанов Алексей Сергеевич, лаборант</p><p>119991, Москва, ул. Вавилова, д. 32</p></bio><bio xml:lang="en"><p>Aleksei S. Epifanov, Laboratory Assistant</p><p>32, Vavilova ul., Moscow, 119991</p></bio><email xlink:type="simple">alex.E.797@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3308-7133</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шершов</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Shershov</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шершов Валерий Евгеньевич, научный сотрудник</p><p>119991, Москва, ул. Вавилова, д. 32</p><p>Scopus Author ID 55581995700</p></bio><bio xml:lang="en"><p>Valeriy E. Shershov, Researcher</p><p>32, Vavilova ul., Moscow, 119991</p><p>Scopus Author ID 55581995700</p></bio><email xlink:type="simple">shershov@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6043-1182</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Суржиков</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Surzhikov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Суржиков Сергей Алексеевич, к.х.н., старший научный сотрудник</p><p>119991, Москва, ул. Вавилова, д. 32</p><p>Scopus Author ID 7006525454</p></bio><bio xml:lang="en"><p>Sergey A. Surzhikov, Cand. Sci. (Chem.), Senior Researcher</p><p>32, Vavilova ul., Moscow, 119991</p></bio><email xlink:type="simple">ssergey77@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5468-4119</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чудинов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chudinov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чудинов Александр Васильевич, к.х.н., заведующий лабораторией</p><p>119991, Москва, ул. Вавилова, д. 32</p><p>Scopus Author ID 7003833018</p></bio><bio xml:lang="en"><p>Alexander V. Chudinov, Cand. Sci. (Chem.), Head of the Laboratory</p><p>32, Vavilova ul., Moscow, 119991</p><p>Scopus Author ID 7003833018</p></bio><email xlink:type="simple">chud@eimb.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9011-134X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лапа</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lapa</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лапа Сергей Анатольевич, к.б.н., старший научный сотрудник</p><p>119991, Москва, ул. Вавилова, д. 32</p><p>Scopus Author ID 6603461000</p></bio><bio xml:lang="en"><p>Sergey A. Lapa, Cand. Sci. (Biol.), Senior Researcher</p><p>32, Vavilova ul., Moscow, 119991</p><p>Scopus Author ID 6603461000</p></bio><email xlink:type="simple">lapa@biochip.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт молекулярной биологии им. В.А. Энгельгардта, Российская академия наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Engelhardt Institute of Molecular Biology, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>03</day><month>11</month><year>2024</year></pub-date><volume>19</volume><issue>5</issue><fpage>408</fpage><lpage>417</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Epifanov A.S., Shershov V.E., Surzhikov S.A., Chudinov A.V., Lapa S.A., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Епифанов А.С., Шершов В.Е., Суржиков С.А., Чудинов А.В., Лапа С.А.</copyright-holder><copyright-holder xml:lang="en">Epifanov A.S., Shershov V.E., Surzhikov S.A., Chudinov A.V., Lapa S.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.finechem-mirea.ru/jour/article/view/2158">https://www.finechem-mirea.ru/jour/article/view/2158</self-uri><abstract><p>Objectives. To study the substrate properties of Cy5-labeled deoxynucleoside triphosphates of various natures (dU and dC) in the process of incorporation in the DNA chain during recombinase polymerase amplification (RPA).Methods. The work used the real-time RPA method. The method of horizontal electrophoresis was used to control the quality of the amplification products obtained.Results. The influence of the fluorophore structure and linker lengths on the substrate properties for deoxynucleoside triphosphates Cy5-dUTP and Cy5-dCTP was studied. The following values of the substrate efficiency parameters were determined: amplification efficiency (kinetic indicator), normalized product yield, and embedding coefficient.Conclusions. Modified deoxynucleoside triphosphates (dNTP) with long linkers between the fluorophore and the nitrogenous base, as well as between the quaternary ammonium group and the second heterocycle of the fluorophore, showed greater substrate efficiency than fluorescently labeled dNTP with short linkers. The modified dU in each pair demonstrated greater substrate efficiency compared to the modified dC.</p></abstract><trans-abstract xml:lang="ru"><p>Цели. Изучить субстратные свойства трифосфатов дезоксинуклеозидов различной природы (dU и dC), флуоресцентно-меченых красителями цианинового ряда Cy5, при их встраивании в цепь ДНК в процессе рекомбиназной полимеразной амплификации (RPA).Методы. В работе использовали метод RPA в режиме реального времени. Для контроля качества получаемых продуктов амплификации использовали метод горизонтального электрофореза.Результаты. Исследовано влияние строения флуорофора и длин линкеров между красителем и азотистым основанием нуклеотида, а также вторым гетероциклом флуорофора и четвертичной аммониевой группой, на субстратные свойства для дезоксинуклеозидтрифосфатов Cy5-dUTP и Cy5-dCTP. Определены значения параметров субстратной эффективности: эффективности амплификации (кинетического показателя), а также нормированного выхода продукта и коэффициента встраивания.Выводы. Модифицированные дезоксинуклеозидтрифосфаты (dNTP) с длинными линкерами между флуорофором и азотистым основанием нуклеотида, а также между четвертичной аммониевой группой и вторым гетероциклом флуорофора, показывали большую субстратную эффективность, в отличие от флуоресцентно-меченых dNTP с короткими линкерами. Модифицированные dU в каждой паре демонстрировали большую субстратную эффективность по сравнению с модифицированными dC.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>рекомбиназная полимеразная амплификация</kwd><kwd>флуоресцентно-меченые дезоксинуклеозидтрифосфаты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>recombinase polymerase amplification</kwd><kwd>fluorescently labeled deoxynucleoside triphosphates</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование поддержано грантом Российского научного фонда № 22-14-00257.</funding-statement><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation, grant No. 22-14-00257.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Boháčová S., Ludvíková L., Poštová Slavětínská L., Vaníková Z., Klán P., Hocek M. 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