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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">ssmu</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень сибирской медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Siberian Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-0363</issn><issn pub-type="epub">1819-3684</issn><publisher><publisher-name>Siberian State Medical University, the Ministry of Healthcare of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20538/1682-0363-2020-3-6-14</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-3586</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>Конформационные особенности лактатдегидрогеназы: влияние температурного фактора в присутствии малых молекул, математическая модель</article-title><trans-title-group xml:lang="en"><trans-title>Conformational features of lactate dehydrogenase: temperature effect in presence of small molecules, mathematical model</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5992-3609</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гильмиярова</surname><given-names>Ф. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Gilmiyarova</surname><given-names>F. N.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">bio-sam@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/0000-0002-5232-1549</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузьмичева</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuzmicheva</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ординатор, кафедра фундаментальной и клинической биохимии с лабораторной диагностикой</p><p>Россия, 443099, г. Самара, ул. Чапаевская, 89</p></bio><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колотьева</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolotyeva</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. мед. наук, доцент, кафедра фундаментальной и клинической биохимии с лабораторной диагностикой</p><p>ОRCID 0000-0002-7583-6222</p><p>Россия, 443099, г. Самара, ул. Чапаевская, 89</p></bio><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6545-0035</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комарова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Komarova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, доцент, кафедра лазерных и биотехнологических систем</p><p>Россия, 443086, г. Самара, Московское шоссе, 34</p></bio><bio xml:lang="en"><p>34, Moscow Highway, Samara, 443086, Russian Federation</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8752-3837</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рыскина</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryskina</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р биол. наук, доцент, кафедра биохимии им. акад. Т.Т. Березова</p><p>Россия, 117198, г. Москва, ул. Миклухо-Маклая, 6 </p></bio><bio xml:lang="en"><p>6, Miklukho-Maklaya Str., Moscow, 117198, Russian Federation</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5619-4583</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гусякова</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gusyakova</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р мед. наук, зав. кафедрой фундаментальной и клинической биохимии с лабораторнойдиагностикой, зав. клинико-диагностической лабораторией клиник</p><p>Россия, 443099, г. Самара, ул. Чапаевская, 89</p></bio><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Виноградова</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Vinogradova</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>отделение молекулярной и радиационной биофизики</p><p>Россия, 188300, Ленинградская обл., г. Гатчина, мкр. Орлова роща, 1</p></bio><bio xml:lang="en"><p>1, Mkr. Orlova Roscha, Gatchina, Leningradskaya Oblast, 188300, Russian Federation</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4441-9025</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Салмин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Salmin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р физ.-мат. наук, профессор, зав. кафедрой медицинской и биологической физики,</p><p>Россия, 660022, г. Красноярск, ул. Партизана Железняка, 1</p></bio><bio xml:lang="en"><p>1, Partizana Zeleznyaka Str., Krasnoyarsk, 660022, Russian Federation</p></bio><xref ref-type="aff" rid="aff-5"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский государственный медицинский университет (СамГМУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Самарский национальный исследовательский университет им. акад. С.П. Королева (Самарский университет)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara National Research University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Российский университет дружбы народов (РУДН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Peoples Friendship University of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Петербургский институт ядерной физики им. Б.П. Константинова Национального исследовательского центра «Курчатовский институт» (НИЦ «Курчатовский институт» – ПИЯФ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Petersburg Nuclear Physics Institute named after B.P. Konstantinov of National Research Centre "Kurchatov Institute"</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Красноярский государственный медицинский университет (КрасГМУ) им. проф. В.Ф. Войно-Ясенецкого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Krasnoyarsk State Medical University named after Professor V.F. Voino-Yasenetsky</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>07</day><month>10</month><year>2020</year></pub-date><volume>19</volume><issue>3</issue><fpage>6</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гильмиярова Ф.Н., Кузьмичева В.И., Колотьева Н.А., Комарова М.В., Рыскина Е.А., Гусякова О.А., Виноградова Д.С., Салмин В.В., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Гильмиярова Ф.Н., Кузьмичева В.И., Колотьева Н.А., Комарова М.В., Рыскина Е.А., Гусякова О.А., Виноградова Д.С., Салмин В.В.</copyright-holder><copyright-holder xml:lang="en">Gilmiyarova F.N., Kuzmicheva V.I., Kolotyeva N.A., Komarova M.V., Ryskina E.A., Gusyakova O.A., Vinogradova D.S., Salmin V.V.</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://bulletin.ssmu.ru/jour/article/view/3586">https://bulletin.ssmu.ru/jour/article/view/3586</self-uri><abstract><sec><title>Цель</title><p>Цель. Исследовать конформационные изменения лактатдегидрогеназы под действием различных концентраций интермедиатов (пируват, оксалоацетат) в температурном градиенте с последующим построением математической модели.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Изучение термолабильности лактатдегидрогеназы проводили с  использованием метода дифференциальной сканирующей флуориметрии по изменению  эндогенной флуоресценции триптофана и тирозина в условиях стабильной концентрации лактатдегидрогеназы и изменяющихся концентраций пирувата и оксалоацетата. Далее была разработана математическая модель для более углубленного рассмотрения поведения каталитического белка.</p></sec><sec><title>Результаты</title><p>Результаты. Было выявлено, что пируват и оксалоацетат в низких концентрациях оказывают термостабилизирующее воздействие на конформацию лактатдегидрогеназы, влияние пирувата статистически более значимо в сравнении с оксалоацетатом (p &lt; 0,05). Изучаемые лиганды в высоких концентрациях снижают термостабильность лактатдегидрогеназы.</p></sec><sec><title>Заключение</title><p>Заключение. Понимание роли малых молекул в регуляции биологических и каталитических процессов долгое время оставалось в тени научного интереса, но сегодня работа в данном направлении выходит на качественно новый уровень.  Полученные данные свидетельствуют о возможности малых молекул выступать в качестве лигандов при взаимодействии с каталитическими белками.</p></sec></abstract><trans-abstract xml:lang="en"><p>The aim of this work was to study the conformational changes of lactate dehydrogenase under the influence of different concentrations of intermediates (pyruvate, oxaloacetate) in the temperature gradient with the  subsequent building of a mathematical model.</p><sec><title>Materials and methods</title><p>Materials and methods. Thermolability of lactate dehydrogenase was studied using the method of differential scanning fluorimetry to determine the change in endogenous fluorescence of tryptophan and tyrosine under the conditions of stable concentration of lactate dehydrogenase and changing concentrations of pyruvate and oxaloacetate. Further, a mathematical model was developed for a more in-depth consideration of the behavior of the catalytic protein.</p></sec><sec><title>Results</title><p>Results. We found that pyruvate and oxaloacetate in low concentrations have a thermostabilizing effect on lactate dehydrogenase conformation; the effect of pyruvate is statistically more significant in comparison with oxaloacetate (p &lt; 0.05). The studied ligands in high concentrations reduce the thermal stability of lactate dehydrogenase.</p></sec><sec><title>Conclusion</title><p>Conclusion. Understanding the role of small molecules in the regulation of biological and catalytic processes has long remained in the background of scientific interest, but today the work in this direction is reaching a new level. The data obtained indicate the possibility of small molecules acting as ligands when interacting with enzymes.  </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>лактатдегидрогеназа</kwd><kwd>конформация</kwd><kwd>дифференциальная сканирующая флуориметрия</kwd><kwd>оксалоацетат</kwd><kwd>пируват</kwd></kwd-group><kwd-group xml:lang="en"><kwd>lactate dehydrogenase</kwd><kwd>conformation</kwd><kwd>differential scanning fluorimetry</kwd><kwd>oxaloacetate</kwd><kwd>pyruvate</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">Castoreno A.B., Ulrike U.S. Small molecule probes of cellular pathways and networks. ACS Chem. Bio. 2010; 6: 86–94. 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