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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">sibmed</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский научный медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Сибирский научный медицинский журнал</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-2512</issn><issn pub-type="epub">2410-2520</issn><publisher><publisher-name>ИЦиГ СО РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15372/SSMJ20180302</article-id><article-id custom-type="elpub" pub-id-type="custom">sibmed-30</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>МЕДИКО-БИОЛОГИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOMEDICINE</subject></subj-group></article-categories><title-group><article-title>ХАРАКТЕРИСТИКИ СВЯЗЫВАНИЯ ТИРОКСИНА С ФРАКЦИЯМИ ЛИПОПРОТЕИНОВ ВЫСОКОЙ ПЛОТНОСТИ И АПОЛИПОПРОТЕИНОМ A-I</article-title><trans-title-group xml:lang="en"><trans-title>CHARACTERISTICS OF BINDING TYROXINE WITH FRACTIONS OF HIGH DENSITY LIPOPROTEINS AND APOLIPOPROTEIN A-I</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>Поляков</surname><given-names>Л. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Polyakov</surname><given-names>L. M.</given-names></name></name-alternatives><email xlink:type="simple">plm@niibch.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>Князев</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Knyasev</surname><given-names>R. A.</given-names></name></name-alternatives><email xlink:type="simple">Knjazev_roman@mail.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>Рябченко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryabchenko</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">borrelia@mail.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>Трифонова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Trifonova</surname><given-names>N. V.</given-names></name></name-alternatives><email xlink:type="simple">nataliya-tverdohleb@yandex.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>Котова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kotova</surname><given-names>M. V.</given-names></name></name-alternatives><email xlink:type="simple">zerokiri@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>НИИ биохимии ФИЦ фундаментальной и трансляционной медицины</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Biochemistry of Federal Research Center for Fundamental and Translational Medicine</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>20</day><month>02</month><year>2019</year></pub-date><volume>38</volume><issue>3</issue><fpage>10</fpage><lpage>15</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Поляков Л.М., Князев Р.А., Рябченко А.В., Трифонова Н.В., Котова М.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Поляков Л.М., Князев Р.А., Рябченко А.В., Трифонова Н.В., Котова М.В.</copyright-holder><copyright-holder xml:lang="en">Polyakov L.M., Knyasev R.A., Ryabchenko A.V., Trifonova N.V., Kotova M.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://sibmed.elpub.ru/jour/article/view/30">https://sibmed.elpub.ru/jour/article/view/30</self-uri><abstract><p>Целью исследования было изучение способности различных фракций липопротеинов плазмы крови человека (очень низкой (ЛПОНП), низкой (ЛПНП) и высокой плотности (ЛПВП) подфракций 2 (ЛПВП2) и 3 (ЛПВП3)) связываться с тироксином (Т4). Методами хроматографии на сефарозе CL-2В показано, что значительная часть меченого125I-тироксина элюируется в объеме выхода фракции ЛПВП, что может свидетельствовать о возможности образования комплексов ЛПВП с Т4. Процесс носил обратимый характер, поскольку введение в данную систему избыточного количества (10-6-10-7 М) немеченого Т4 приводило к вытеснению125I-Т4 из комплексов с ЛПВП, что свидетельствует о взаимодействии типа «белок - лиганд». Исследовано влияние условий среды на образование комплексов Т4 с ЛПВП. Повышение температуры до 40 °С приводило к более чем 50%-му снижению выхода радиоактивности с фракцией ЛПВП. Комплексообразование уменьшалось при 4 °С, однако при этом комплексы отличались наибольшей устойчивостью. Методом тушения триптофановой флуоресценции получены основные физико-химические характеристики взаимодействия Т4 с подфракциями ЛПВП2, ЛПВП3. Константы комплексообразования ЛПВП с Т4 составили порядка 106-107 М-1. Наибольшее сродство к Т4 обнаружено для частиц подфракции ЛПВП3. Установлено, что в комплексообразовании с Т4 принимает участие основной белковый компонент ЛПВП - аполипопротеин А-I, у которого имеется один центр связывания.</p></abstract><trans-abstract xml:lang="en"><p>The aim of the study was to study the binding of various fractions of human blood plasma lipoproteins (VLDL, LDL, HDL2 and HDL3) with thyroxine (T4). Chromatography on Sepharose CL-2B showed that a significant portion of the labeled125I-thyroxine eluted in the volume of the output of the HDL fraction, which may indicate the possibility of formation of HDL-T4 complexes. The process was reversible, since the introduction of an excessive amount (10-6-10-7 M) of unlabeled T4 into the system resulted in the displacement of125I-T4 from complexes with HDL, which indicates a «protein - ligand» type interaction. The effect of environmental conditions on the formation of complexes of T4 with HDL is investigated. An increase in temperature to 40 °C resulted in a more than 50 % decrease in the release of radioactivity with a fraction of HDL. Complexation decreased at 4 °C, however, the complexes showed the greatest stability. The main physicochemical characteristics of the interaction of T4 with subfractions of HDL2 and HDL3 were obtained by quenching tryptophan fluorescence. The complexation constants of HDL with T4 were of the order of 106-107 M-1. The greatest affinity for T4 was found for particles of subfraction of HDL3. It was established that the main protein component of HDL ─ apolipoprotein A-I takes part in complexation with T4, on which has one binding center.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>липопротеины высокой плотности</kwd><kwd>тироксин</kwd><kwd>аполипопротеин А-I</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">Attalah N.A., Lata G.F. 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