<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">10301</article-id><article-id pub-id-type="doi">10.32607/20758251-2019-11-1-29-37</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Thermodynamics of the DNA Repair Process by Endonuclease VIII</article-title><trans-title-group xml:lang="ru"><trans-title>Термодинамические параметры взаимодействия эндонуклеазы VIII с поврежденной ДНК</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kladova</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Кладова</surname><given-names>O. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fedorova@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuznetsov</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Кузнецов</surname><given-names>Н. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikita.kuznetsov@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Fedorova</surname><given-names>O. S.</given-names></name><name xml:lang="ru"><surname>Федорова</surname><given-names>O. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fedorova@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт химической биологии и фундаментальной медицины СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Novosibirsk State University</institution></aff><aff><institution xml:lang="ru">Новосибирский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2019</year></pub-date><volume>11</volume><issue>1</issue><issue-title xml:lang="en">VOL 11, NO1 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 11, №1 (2019)</issue-title><fpage>29</fpage><lpage>37</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Kladova O.A., Kuznetsov N.A., Fedorova O.S.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Кладова O.A., Кузнецов Н.A., Федорова O.С.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Kladova O.A., Kuznetsov N.A., Fedorova O.S.</copyright-holder><copyright-holder xml:lang="ru">Кладова O.A., Кузнецов Н.A., Федорова O.С.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/10301">https://actanaturae.ru/2075-8251/article/view/10301</self-uri><abstract xml:lang="en"><p>In the present work, a thermodynamic analysis of the interaction between endonuclease VIII (Endo VIII) and model DNA substrates containing damaged nucleotides, such as 5,6-dihydrouridine and 2-hydroxymethyl-3-hydroxytetrahydrofuran (F-site), was performed. The changes in the fluorescence intensity of the 1,3-diaza-2-oxophenoxazine (tCO) residue located in the complementary chain opposite to the specific site were recorded in the course of the enzyme-substrate interaction. The kinetics was analyzed by the stopped-flow method at different temperatures. The changes of standard Gibbs free energy, enthalpy, and entropy of sequential steps of DNA substrate binding, as well as activation enthalpy and entropy for the transition complex formation of the catalytic stage, were calculated. The comparison of the kinetic and thermodynamic data characterizing the conformational transitions of enzyme and DNA in the course of their interaction made it possible to specify the nature of the molecular processes occurring at the stages of substrate binding, recognition of the damaged base, and its removal from DNA.</p></abstract><trans-abstract xml:lang="ru"><p>Проведен термодинамический анализ взаимодействия эндонуклеазы VIII (Endo VIII) с модель ными ДНК, содержащими поврежденные нуклеотиды, такие, как 5,6-дигидроуридин и 2-гидроксиметил-3-гидрокситетрагидрофуран (F-сайт). Методом «остановленного потока» при разных температурах с реги страцией изменений интенсивности флуоресценции остатка 1,3-диаза-2-оксофеноксазина, расположенного в комплементарной цепи напротив специфического сайта, проведен анализ кинетики фермент-субстратного взаимодействия. Рассчитаны изменения стандартной свободной энергии Гиббса, энтальпии и энтропии для последовательных стадий ферментативного процесса, а также образования переходного состояния в каталитической стадии. Совокупный анализ кинетических и термодинамических данных о конформационных превращениях фермента Endo VIII и ДНК, протекающих в ходе их взаимодействия, позволил дета лизировать природу молекулярных процессов, происходящих на стадиях связывания субстрата, узнавания поврежденного основания и его удаления из ДНК.</p></trans-abstract><kwd-group xml:lang="en"><kwd>thermodynamics</kwd><kwd>pre-steady-state kinetics</kwd><kwd>kinetic mechanism</kwd><kwd>DNA glycosylase</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ДНК-гликозилаза</kwd><kwd>кинетический механизм</kwd><kwd>предстационарная кинетика</kwd><kwd>термодинамика</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by budget funding (No. VI.57.1.2, 0309-2016-0001). Using the funds of the Russian Science Foundation grant No. 18-14-00135, a pre-stationary kinetic analysis of the interaction of the enzyme with DNA substrates was performed.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при поддержке бюджетного финансирования (№ VI.57.1.2, 0309-2016-0001). За счет средств гранта РНФ № 18-14-00135 выполнен предстационарный кинетический анализ взаимодействия фермента c ДНК-субстратами.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Jiang D., Hatahet Z., Melamede R.J., Kow Y.W., Wallace S.S. // J. Biol. Chem. 1997, V.272, №51, P.32230-32239</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>[2] Melamede R.J., Hatahet Z., Kow Y.W., Ide H., Wallace S.S. // Biochemistry. 1994, V.33, №5, P.1255-1264</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>[3] Burgess S., Jaruga P., Dodson M.L., Dizdaroglu M., Lloyd R.S. // J. Biol. Chem. 2002, V.277, №25, P.2938-2944</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>[4] Kropachev K.Y., Zharkov D.O., Grollman A.P. // Biochemistry. 2006, V.45, P.12039-12049</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>[5] Golan G., Zharkov D.O., Feinberg H., Fernandes A.S., Zaika E.I., Kycia J.H., Grollman A.P., Shoham G. // Nucleic Acids Research 2005, V.33, №15, P.5006-5016</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>[6] Zharkov D.O., Golan G., Gilboa R., Fernandes A.S., Gerchman S.E., Kycia J.H., Rieger R.A., Grollman A.P., Shoham G. // EMBO J. 2002, V.21, №4, P.789-800</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>[7] Kuznetsov N.A., Koval V.V., Zharkov D.O., Fedorova O.S. // DNA Repair. 2012, V.11, №11, P.884-891</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>[8] Kuznetsova A.A., Kuznetsov N.A., Vorobjev Y.N., Barthes N.P.F., Michel B.Y., Burger A., Fedorova O.S. // PLoS One. 2014, V.9, №6, e100007</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>[9] Kladova O.A., Kuznetsova A.A., Fedorova O.S., Kuznetsov N.A. // Genes (Basel). 2017, V.8, №5, P.1-13</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>[10] // Fasman G.D. Handbook of Biochemistry and Molecular Biology. 3rd Ed. // Fasman G.D. Handbook of Biochemistry and Molecular Biology. 3rd Ed.// Cleveland: CRC Press, 1975. 1975</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>[11] Gill S.C., von Hippel P.H. // Anal. Biochem. 1989, V.182, P.319-326</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>[12] Kuzmic P. // Anal. Biochem. 1996, V.237, P.260-273</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>[13] Yakovlev D.A., Kuznetsova A.A., Fedorova O.S., Kuznetsov N.A. // Acta Naturae. 2017, V.9, №1, P.88-98</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>[14] Kuznetsova A.A., Iakovlev D.A., Misovets I.V., Ishchenko A.A., Saparbaev M.K., Kuznetsov N.A., Fedorova O.S. // Mol. Biosyst. 2017, V.13, №12, P.2638-2649</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>[15] Kuznetsov N.A., Kiryutin A.S., Kuznetsova A.A., Panov M.S., Barsukova M.O., Yurkovskaya A.V., Fedorova O.S. // J. Biomol. Struct. Dyn. 2017, V.35, №5, P.950-967</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>[16] Miroshnikova A.D., Kuznetsova A.A., Vorobjev Y.N., Kuznetsov N.A., Fedorova O.S. // Mol. BioSyst. 2016, V.12, №5, P.1527-1539</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>[17] Atkins P., Paula J. // Atkins’ Physical Chemistry. 8th Ed. Oxford university press, 2006. 2006</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>[18] Ragone R., Colonna G., Ambrosone L. // J. Phys. Chem. 1995, V.99, №34, P.13050</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>[19] Kuznetsov N.A., Vorobjev Y.N., Krasnoperov L.N., Fedorova O.S. // Nucleic Acids Research 2012, V.40, №15, P.7384-7392</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>[20] Kuznetsov N.A., Kuznetsova A.A., Vorobjev Y.N., Krasnoperov L.N., Fedorova O.S. // PLoS One. 2014, V.9, №6, e98495</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>[21] Miroshnikova A.D., Kuznetsova A.A., Kuznetsov N.A., Fedorova O.S. // Acta Naturae. 2016, V.8, №1, P.103-110</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>[22] Kladova O.A., Krasnoperov L.N., Kuznetsov N.A., Fedorova O.S. // Genes (Basel). 2018, V.9, №4, P.E190</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>[23] Kuznetsov N.A., Fedorova O.S. // Biochem. 2016, V.81, №10, P.1136-1152</mixed-citation></ref></ref-list></back></article>
