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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">problendo</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы Эндокринологии</journal-title><trans-title-group xml:lang="en"><trans-title>Problems of Endocrinology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0375-9660</issn><issn pub-type="epub">2308-1430</issn><publisher><publisher-name>Endocrinology Research Centre</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14341/probl199844137-40</article-id><article-id custom-type="elpub" pub-id-type="custom">problendo-11230</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Взаимодействие селективного агониста прогестерона 16а, 17а-циклогекс-3'-енопрогестерона с рецептором прогестерона матки крысы</article-title><trans-title-group xml:lang="en"><trans-title>Interaction of the selective progesterone 16a, 17a-cyclohex-3'-enoprogesterone agonist with the rat uterus progesterone receptor</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>Смирнов</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnov</surname><given-names>A. N.</given-names></name></name-alternatives><email xlink:type="simple">probl@endojournals.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>Покровская</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pokrovskaya</surname><given-names>E. V.</given-names></name></name-alternatives><email xlink:type="simple">probl@endojournals.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>Шевченко</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Shevchenko</surname><given-names>V. P.</given-names></name></name-alternatives><email xlink:type="simple">probl@endojournals.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>Левина</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Levina</surname><given-names>I. S.</given-names></name></name-alternatives><email xlink:type="simple">probl@endojournals.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>Камерницкий</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kamernitsky</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">probl@endojournals.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>&lt;p&gt;Московский государственный университет им. М. В. Ломоносова; Институт молекулярной генетики РАН; Институт органической химии им. Н. Д. Зелинского РАН&lt;/p&gt;</institution><country>Россия</country></aff><aff xml:lang="en"><institution>&lt;p&gt;Moscow State University M.V. Lomonosov; Institute of Molecular Genetics RAS; Institute of Organic Chemistry N. D. Zelinsky RAS&lt;/p&gt;</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>1998</year></pub-date><pub-date pub-type="epub"><day>01</day><month>02</month><year>1998</year></pub-date><volume>44</volume><issue>1</issue><issue-title>ТОМ 44, №1 (1998)</issue-title><fpage>37</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Смирнов А.Н., Покровская Е.В., Шевченко В.П., Левина И.С., Камерницкий А.В., 1998</copyright-statement><copyright-year>1998</copyright-year><copyright-holder xml:lang="ru">Смирнов А.Н., Покровская Е.В., Шевченко В.П., Левина И.С., Камерницкий А.В.</copyright-holder><copyright-holder xml:lang="en">Smirnov A.N., Pokrovskaya E.V., Shevchenko V.P., Levina I.S., Kamernitsky A.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://www.probl-endojournals.ru/jour/article/view/11230">https://www.probl-endojournals.ru/jour/article/view/11230</self-uri><abstract><p>Проведено сравнительное изучение характеристик связывания [3Н]-16а., 17а-циклогекс-3'-енопрогестерона (I) и [3 Н]-прогестерона (II) с белками растворимой фракции матки крысы. Установлено, что I специфически взаимодействует с рецептором прогестерона, но не с другими белками. Его сродство к рецептору, оцененное по величинам Kd (11,6 ± 2,0 нМ), Kj (15 нМ), относительной конкурентной активности (0,89 ± 0,35 и 0,33 ± 0,04 при использовании [3Н]-1 и [3Н]-П соответственно), лишь ненамного уступает сродству природного гормона (Kd = 6,9 ± 2,6 нМ; Kj = 8,5 нМ; относительная конкурентная активность = 1). Диссоциация комплексов [3Н]-1 и [3Н]-П с рецептором носила двухфазный характер при сходных величинах константы скорости диссоциации (k"j = 1,8 • 1(Г5 С-1; кД — 4,5-10^4 С-1). Особенностями взаимодействия [3Н]-1 с рецептором по сравнению с [3Н]-И служат меньшая доля быстродиссоциирующих [3Н]-1 -комплексов и меньшая способность [3Н]-1 предотвращать деградацию рецептора. Высказано предположение, что выявленные особенности отражают различия в конформации рецептора и сопряжены с селективностью действия I.</p></abstract><trans-abstract xml:lang="en"><p>Binding of [3H]-16a-cyclohex-3'-enoprogesterone (I) and [3 H]-progesterone (II) with soluble fraction proteins of the rat uterus is compared. I specifically reacts with progesterone receptor but not with other proteins. Its affinity to the receptor assessed from Kd (11.6+2.0 nM), Kj (15 nM) values and relative competitive'activity (0.89+0.35 and 0.33+0.04 with [3H]-I and [3H]-II, respectively) is just negligibly inferior to the affinity of the natural hormone (Kd=6.9+2.6 nM, Kj=8.5 nM, relative competitive activity =1). The dissociation of [3H]-I and [3H]-II complexes with the receptor was biphasic with similar constants of dissociation rate (kfI=1.8x.lO'5C'1; кД=4.5*10'4 C1). Specific features of [3H]-I reaction with the receptor in comparison with [3H]-II are a lesser share of rapidly dissociating [3H]-I complexes and a lower capacity of [3H]-I to prevent the receptor degradation. It is probable that the detected features reflect the differences in the receptor conformation and are associated with the selectivity of I action.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>прогестерон</kwd><kwd>белки растворимой фракции</kwd><kwd>сохранение беременности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>progesterone</kwd><kwd>soluble fraction proteins</kwd><kwd>pregnancy preservation</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">Камерницкий А. В., Левина И. С. // Хим.-фарм. журн. — 1991. - № 10. - С. 4-16.</mixed-citation><mixed-citation xml:lang="en">Камерницкий А. В., Левина И. 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