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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-237</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="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>СПЕКТРОСКОПИЧЕСКОЕ ИССЛЕДОВАНИЕ СВЯЗЫВАНИЯ НЕТРОПСИНА И HOECHST 33258 С НУКЛЕИНОВЫМИ КИСЛОТАМИ</article-title><trans-title-group xml:lang="en"><trans-title>SPECTROSCOPIC STUDY OF THE BINDING OF NETROPSIN AND HOECHST 33258 WITH NUCLEIC ACIDS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вардеванян</surname><given-names>П. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Vardevanyan</surname><given-names>P. O.</given-names></name></name-alternatives><email xlink:type="simple">p.vardevanyan@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Парсаданян</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Parsadanyan</surname><given-names>M. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Антонян</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Antonyan</surname><given-names>A. P.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саакян</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Sahakyan</surname><given-names>V. G.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ереванский государственный университет</institution></aff><aff xml:lang="en"><institution>Yerevan State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>85</volume><issue>2</issue><fpage>321</fpage><lpage>326</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Вардеванян П.О., Парсаданян М.А., Антонян А.П., Саакян В.Г., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Вардеванян П.О., Парсаданян М.А., Антонян А.П., Саакян В.Г.</copyright-holder><copyright-holder xml:lang="en">Vardevanyan P.O., Parsadanyan M.A., Antonyan A.P., Sahakyan V.G.</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://zhps.ejournal.by/jour/article/view/237">https://zhps.ejournal.by/jour/article/view/237</self-uri><abstract><p>Спектрофотометрическим методом исследовано взаимодействие желобково связывающихся соединений - пептидного антибиотика (полиамида) нетропсина и флуоресцентного красителя (бис-бензимидазола) Hoechst 33258 - с двухцепочечной ДНК и с синтетическим двухцепочечным полинуклеотидом poly(rA)-poly(rU). Получены спектры поглощения указанных комплексов лигандов с нуклеиновыми кислотами (НК). Спектральные изменения при комплексообразовании отдельных лигандов с указанными НК выявляют схожесть связывания каждого из этих лигандов и с ДНК, и с РНК. На основании спектроскопических измерений определены параметры связывания нетропсина и Hoechst 33258 с ДНК и poly(rА)-poly(rU) - K и n, а также термодинамические параметры DS, DG и DH. Выявлено, что связывание Hoechst 33258 с обеими НК сопровождается положительным изменением энтальпии, в то время как в случае нетропсина изменение энтальпии отрицательное. При этом вклад энтропийного фактора в образование комплексов более выражен в случае Hoechst 33258. </p></abstract><trans-abstract xml:lang="en"><p>The interaction of the groove binding compounds - peptide antibiotic netropsin and fluorescent dye (bis-benzimidazole) Hoechst 33258 - with the double-stranded DNA and synthetic double-stranded polynucleotide poly(rA)-poly(rU) has been studied by spectrophotometry. The absorption spectra of these ligand complexes with the nucleic acids have been obtained. Spectral changes at the complexation of individual ligands with the mentioned nucleic acids reveal the similarity of binding of each of these ligands with both DNA and RNA. Based on the spectroscopic measurements, the parameters of netropsin and Hoechst 33258 binding with DNA and poly(rA)-poly(rU) - K and n, as well as the thermodynamic parameters DS, DG, and DH have been determined. It is found that the binding of Hoechst 33258 with both nucleic acids is accompanied by a positive change in enthalpy, while in the case of netropsin the change in enthalpy is negative. Moreover, the contribution of the entropy factor to the formation of the complexes is more pronounced in the case of Hoechst 33258. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>абсорбционная спектроскопия</kwd><kwd>спектр поглощения</kwd><kwd>нетропсин</kwd><kwd>Hoechst 33258</kwd><kwd>ДНК</kwd><kwd>poly(rA)-poly(rU)</kwd><kwd>термодинамические параметры</kwd><kwd>absorption spectroscopy</kwd><kwd>absorption spectrum</kwd><kwd>netropsin</kwd><kwd>Hoechst 33258</kwd><kwd>DNA</kwd><kwd>poly(rA)-poly(rU)</kwd><kwd>thermodynamic parameters</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">D. Rentzeperis, L. A. Marky, T. J. Dwyer, B. H. Gelerstanger, J. G. Pelton, D. E. Wemmer. 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